io_device.cc (8798:adaa92be9037) io_device.cc (8799:dac1e33e07b0)
1/*
2 * Copyright (c) 2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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42
43
44Tick
45PioPort::recvAtomic(PacketPtr pkt)
46{
47 return pkt->isRead() ? device->read(pkt) : device->write(pkt);
48}
49
1/*
2 * Copyright (c) 2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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42
43
44Tick
45PioPort::recvAtomic(PacketPtr pkt)
46{
47 return pkt->isRead() ? device->read(pkt) : device->write(pkt);
48}
49
50void
51PioPort::getDeviceAddressRanges(AddrRangeList &resp, bool &snoop)
50AddrRangeList
51PioPort::getAddrRanges()
52{
52{
53 snoop = false;
54 device->addressRanges(resp);
55 for (AddrRangeIter i = resp.begin(); i != resp.end(); i++)
56 DPRINTF(BusAddrRanges, "Adding Range %#x-%#x\n", i->start, i->end);
53 return device->getAddrRanges();
57}
58
59
60PioDevice::PioDevice(const Params *p)
61 : MemObject(p), sys(p->system), pioPort(NULL)
62{}
63
64PioDevice::~PioDevice()
65{
66 if (pioPort)
67 delete pioPort;
68}
69
70void
71PioDevice::init()
72{
73 if (!pioPort)
74 panic("Pio port of %s not connected to anything!", name());
54}
55
56
57PioDevice::PioDevice(const Params *p)
58 : MemObject(p), sys(p->system), pioPort(NULL)
59{}
60
61PioDevice::~PioDevice()
62{
63 if (pioPort)
64 delete pioPort;
65}
66
67void
68PioDevice::init()
69{
70 if (!pioPort)
71 panic("Pio port of %s not connected to anything!", name());
75 pioPort->sendStatusChange(Port::RangeChange);
72 pioPort->sendRangeChange();
76}
77
78Port *
79PioDevice::getPort(const std::string &if_name, int idx)
80{
81 if (if_name == "pio") {
82 if (pioPort != NULL)
83 fatal("%s: pio port already connected to %s",

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100 return count;
101}
102
103BasicPioDevice::BasicPioDevice(const Params *p)
104 : PioDevice(p), pioAddr(p->pio_addr), pioSize(0),
105 pioDelay(p->pio_latency)
106{}
107
73}
74
75Port *
76PioDevice::getPort(const std::string &if_name, int idx)
77{
78 if (if_name == "pio") {
79 if (pioPort != NULL)
80 fatal("%s: pio port already connected to %s",

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97 return count;
98}
99
100BasicPioDevice::BasicPioDevice(const Params *p)
101 : PioDevice(p), pioAddr(p->pio_addr), pioSize(0),
102 pioDelay(p->pio_latency)
103{}
104
108void
109BasicPioDevice::addressRanges(AddrRangeList &range_list)
105AddrRangeList
106BasicPioDevice::getAddrRanges()
110{
111 assert(pioSize != 0);
107{
108 assert(pioSize != 0);
112 range_list.clear();
109 AddrRangeList ranges;
113 DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize);
110 DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize);
114 range_list.push_back(RangeSize(pioAddr, pioSize));
111 ranges.push_back(RangeSize(pioAddr, pioSize));
112 return ranges;
115}
116
117
118DmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff,
119 bool recv_snoops)
120 : Port(dev->name() + "-dmaport", dev), device(dev), sys(s),
121 pendingCount(0), actionInProgress(0), drainEvent(NULL),
122 backoffTime(0), minBackoffDelay(min_backoff),
123 maxBackoffDelay(max_backoff), inRetry(false), recvSnoops(recv_snoops),
113}
114
115
116DmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff,
117 bool recv_snoops)
118 : Port(dev->name() + "-dmaport", dev), device(dev), sys(s),
119 pendingCount(0), actionInProgress(0), drainEvent(NULL),
120 backoffTime(0), minBackoffDelay(min_backoff),
121 maxBackoffDelay(max_backoff), inRetry(false), recvSnoops(recv_snoops),
124 snoopRangeSent(false), backoffEvent(this)
122 backoffEvent(this)
125{ }
126
127bool
128DmaPort::recvTiming(PacketPtr pkt)
129{
130 if (pkt->wasNacked()) {
131 DPRINTF(DMA, "Received nacked %s addr %#x\n",
132 pkt->cmdString(), pkt->getAddr());
133
134 if (backoffTime < minBackoffDelay)
135 backoffTime = minBackoffDelay;
136 else if (backoffTime < maxBackoffDelay)
137 backoffTime <<= 1;
138
123{ }
124
125bool
126DmaPort::recvTiming(PacketPtr pkt)
127{
128 if (pkt->wasNacked()) {
129 DPRINTF(DMA, "Received nacked %s addr %#x\n",
130 pkt->cmdString(), pkt->getAddr());
131
132 if (backoffTime < minBackoffDelay)
133 backoffTime = minBackoffDelay;
134 else if (backoffTime < maxBackoffDelay)
135 backoffTime <<= 1;
136
139 reschedule(backoffEvent, curTick() + backoffTime, true);
137 device->reschedule(backoffEvent, curTick() + backoffTime, true);
140
141 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime);
142
143 pkt->reinitNacked();
144 queueDma(pkt, true);
145 } else if (pkt->isRequest() && recvSnoops) {
146 return true;
147 } else if (pkt->senderState) {

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159 // We shouldn't ever get a block in ownership state
160 assert(!(pkt->memInhibitAsserted() && !pkt->sharedAsserted()));
161
162 state->numBytes += pkt->req->getSize();
163 assert(state->totBytes >= state->numBytes);
164 if (state->totBytes == state->numBytes) {
165 if (state->completionEvent) {
166 if (state->delay)
138
139 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime);
140
141 pkt->reinitNacked();
142 queueDma(pkt, true);
143 } else if (pkt->isRequest() && recvSnoops) {
144 return true;
145 } else if (pkt->senderState) {

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157 // We shouldn't ever get a block in ownership state
158 assert(!(pkt->memInhibitAsserted() && !pkt->sharedAsserted()));
159
160 state->numBytes += pkt->req->getSize();
161 assert(state->totBytes >= state->numBytes);
162 if (state->totBytes == state->numBytes) {
163 if (state->completionEvent) {
164 if (state->delay)
167 schedule(state->completionEvent, curTick() + state->delay);
165 device->schedule(state->completionEvent,
166 curTick() + state->delay);
168 else
169 state->completionEvent->process();
170 }
171 delete state;
172 }
173 delete pkt->req;
174 delete pkt;
175

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229 inRetry = true;
230 DPRINTF(DMA, "-- Failed, queued\n");
231 }
232 } while (!backoffTime && result && transmitList.size());
233
234 if (transmitList.size() && backoffTime && !inRetry) {
235 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick()+backoffTime);
236 if (!backoffEvent.scheduled())
167 else
168 state->completionEvent->process();
169 }
170 delete state;
171 }
172 delete pkt->req;
173 delete pkt;
174

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228 inRetry = true;
229 DPRINTF(DMA, "-- Failed, queued\n");
230 }
231 } while (!backoffTime && result && transmitList.size());
232
233 if (transmitList.size() && backoffTime && !inRetry) {
234 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick()+backoffTime);
235 if (!backoffEvent.scheduled())
237 schedule(backoffEvent, backoffTime + curTick());
236 device->schedule(backoffEvent, backoffTime + curTick());
238 }
239 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n",
240 transmitList.size(), backoffTime, inRetry,
241 backoffEvent.scheduled());
242}
243
244
245void

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315 DPRINTF(DMA, "-- Failed: queued\n");
316 }
317 } while (result && !backoffTime && transmitList.size());
318
319 if (transmitList.size() && backoffTime && !inRetry &&
320 !backoffEvent.scheduled()) {
321 DPRINTF(DMA, "-- Scheduling backoff timer for %d\n",
322 backoffTime+curTick());
237 }
238 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n",
239 transmitList.size(), backoffTime, inRetry,
240 backoffEvent.scheduled());
241}
242
243
244void

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314 DPRINTF(DMA, "-- Failed: queued\n");
315 }
316 } while (result && !backoffTime && transmitList.size());
317
318 if (transmitList.size() && backoffTime && !inRetry &&
319 !backoffEvent.scheduled()) {
320 DPRINTF(DMA, "-- Scheduling backoff timer for %d\n",
321 backoffTime+curTick());
323 schedule(backoffEvent, backoffTime + curTick());
322 device->schedule(backoffEvent, backoffTime + curTick());
324 }
325 } else if (state == Enums::atomic) {
326 transmitList.pop_front();
327
328 Tick lat;
329 DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n",
330 pkt->req->getPaddr(), pkt->req->getSize());
331 lat = sendAtomic(pkt);

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337 DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n",
338 pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes,
339 state->totBytes,
340 state->completionEvent ? state->completionEvent->scheduled() : 0 );
341
342 if (state->totBytes == state->numBytes) {
343 if (state->completionEvent) {
344 assert(!state->completionEvent->scheduled());
323 }
324 } else if (state == Enums::atomic) {
325 transmitList.pop_front();
326
327 Tick lat;
328 DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n",
329 pkt->req->getPaddr(), pkt->req->getSize());
330 lat = sendAtomic(pkt);

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336 DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n",
337 pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes,
338 state->totBytes,
339 state->completionEvent ? state->completionEvent->scheduled() : 0 );
340
341 if (state->totBytes == state->numBytes) {
342 if (state->completionEvent) {
343 assert(!state->completionEvent->scheduled());
345 schedule(state->completionEvent, curTick() + lat + state->delay);
344 device->schedule(state->completionEvent,
345 curTick() + lat + state->delay);
346 }
347 delete state;
348 delete pkt->req;
349 }
350 pendingCount--;
351 assert(pendingCount >= 0);
352 delete pkt;
353

--- 30 unchanged lines hidden --- 		346 }
347 delete state;
348 delete pkt->req;
349 }
350 pendingCount--;
351 assert(pendingCount >= 0);
352 delete pkt;
353

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