io_device.cc (8711:c7e14f52c682) io_device.cc (8742:9df38d259935)
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
50AddrRangeList
51PioPort::getAddrRanges()
50void
51PioPort::getDeviceAddressRanges(AddrRangeList &resp, bool &snoop)
52{
52{
53 return device->getAddrRanges();
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);
54}
55
56
57PioDevice::PioDevice(const Params *p)
57}
58
59
60PioDevice::PioDevice(const Params *p)
58 : MemObject(p), platform(p->platform), sys(p->system), pioPort(NULL)
61 : 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)
62{}
63
64PioDevice::~PioDevice()
65{
66 if (pioPort)
67 delete pioPort;
68}
69
70void
71PioDevice::init()
72{
73 if (!pioPort)
71 panic("Pio port of %s not connected to anything!", name());
72 pioPort->sendRangeChange();
74 panic("Pio port not connected to anything!");
75 pioPort->sendStatusChange(Port::RangeChange);
73}
74
76}
77
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",
81 name(), pioPort->getPeer()->name());
82 pioPort = new PioPort(this, sys);
83 return pioPort;
84 }
85 return NULL;
86}
87
88unsigned int
89PioDevice::drain(Event *de)
90{
91 unsigned int count;
92 count = pioPort->drain(de);
93 if (count)
94 changeState(Draining);
95 else
96 changeState(Drained);
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
78
79unsigned int
80PioDevice::drain(Event *de)
81{
82 unsigned int count;
83 count = pioPort->drain(de);
84 if (count)
85 changeState(Draining);
86 else
87 changeState(Drained);
88 return count;
89}
90
91BasicPioDevice::BasicPioDevice(const Params *p)
92 : PioDevice(p), pioAddr(p->pio_addr), pioSize(0),
93 pioDelay(p->pio_latency)
94{}
95
105AddrRangeList
106BasicPioDevice::getAddrRanges()
96void
97BasicPioDevice::addressRanges(AddrRangeList &range_list)
107{
108 assert(pioSize != 0);
98{
99 assert(pioSize != 0);
109 AddrRangeList ranges;
100 range_list.clear();
110 DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize);
101 DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize);
111 ranges.push_back(RangeSize(pioAddr, pioSize));
112 return ranges;
102 range_list.push_back(RangeSize(pioAddr, pioSize));
113}
114
115
103}
104
105
116DmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff,
117 bool recv_snoops)
106DmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff)
118 : Port(dev->name() + "-dmaport", dev), device(dev), sys(s),
119 pendingCount(0), actionInProgress(0), drainEvent(NULL),
120 backoffTime(0), minBackoffDelay(min_backoff),
107 : Port(dev->name() + "-dmaport", dev), device(dev), sys(s),
108 pendingCount(0), actionInProgress(0), drainEvent(NULL),
109 backoffTime(0), minBackoffDelay(min_backoff),
121 maxBackoffDelay(max_backoff), inRetry(false), recvSnoops(recv_snoops),
122 backoffEvent(this)
110 maxBackoffDelay(max_backoff), inRetry(false), backoffEvent(this)
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
111{ }
112
113bool
114DmaPort::recvTiming(PacketPtr pkt)
115{
116 if (pkt->wasNacked()) {
117 DPRINTF(DMA, "Received nacked %s addr %#x\n",
118 pkt->cmdString(), pkt->getAddr());
119
120 if (backoffTime < minBackoffDelay)
121 backoffTime = minBackoffDelay;
122 else if (backoffTime < maxBackoffDelay)
123 backoffTime <<= 1;
124
137 device->reschedule(backoffEvent, curTick() + backoffTime, true);
125 reschedule(backoffEvent, curTick() + backoffTime, true);
138
139 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime);
140
141 pkt->reinitNacked();
142 queueDma(pkt, true);
126
127 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime);
128
129 pkt->reinitNacked();
130 queueDma(pkt, true);
143 } else if (pkt->isRequest() && recvSnoops) {
144 return true;
145 } else if (pkt->senderState) {
146 DmaReqState *state;
147 backoffTime >>= 2;
148
149 DPRINTF(DMA, "Received response %s addr %#x size %#x\n",
150 pkt->cmdString(), pkt->getAddr(), pkt->req->getSize());
151 state = dynamic_cast<DmaReqState*>(pkt->senderState);
152 pendingCount--;

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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)
131 } else if (pkt->senderState) {
132 DmaReqState *state;
133 backoffTime >>= 2;
134
135 DPRINTF(DMA, "Received response %s addr %#x size %#x\n",
136 pkt->cmdString(), pkt->getAddr(), pkt->req->getSize());
137 state = dynamic_cast<DmaReqState*>(pkt->senderState);
138 pendingCount--;

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143 // We shouldn't ever get a block in ownership state
144 assert(!(pkt->memInhibitAsserted() && !pkt->sharedAsserted()));
145
146 state->numBytes += pkt->req->getSize();
147 assert(state->totBytes >= state->numBytes);
148 if (state->totBytes == state->numBytes) {
149 if (state->completionEvent) {
150 if (state->delay)
165 device->schedule(state->completionEvent,
166 curTick() + state->delay);
151 schedule(state->completionEvent, curTick() + state->delay);
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())
152 else
153 state->completionEvent->process();
154 }
155 delete state;
156 }
157 delete pkt->req;
158 delete pkt;
159

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213 inRetry = true;
214 DPRINTF(DMA, "-- Failed, queued\n");
215 }
216 } while (!backoffTime && result && transmitList.size());
217
218 if (transmitList.size() && backoffTime && !inRetry) {
219 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick()+backoffTime);
220 if (!backoffEvent.scheduled())
236 device->schedule(backoffEvent, backoffTime + curTick());
221 schedule(backoffEvent, 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());
222 }
223 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n",
224 transmitList.size(), backoffTime, inRetry,
225 backoffEvent.scheduled());
226}
227
228
229void

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299 DPRINTF(DMA, "-- Failed: queued\n");
300 }
301 } while (result && !backoffTime && transmitList.size());
302
303 if (transmitList.size() && backoffTime && !inRetry &&
304 !backoffEvent.scheduled()) {
305 DPRINTF(DMA, "-- Scheduling backoff timer for %d\n",
306 backoffTime+curTick());
322 device->schedule(backoffEvent, backoffTime + curTick());
307 schedule(backoffEvent, backoffTime + curTick());
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());
308 }
309 } else if (state == Enums::atomic) {
310 transmitList.pop_front();
311
312 Tick lat;
313 DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n",
314 pkt->req->getPaddr(), pkt->req->getSize());
315 lat = sendAtomic(pkt);

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321 DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n",
322 pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes,
323 state->totBytes,
324 state->completionEvent ? state->completionEvent->scheduled() : 0 );
325
326 if (state->totBytes == state->numBytes) {
327 if (state->completionEvent) {
328 assert(!state->completionEvent->scheduled());
344 device->schedule(state->completionEvent,
345 curTick() + lat + state->delay);
329 schedule(state->completionEvent, curTick() + lat + state->delay);
346 }
347 delete state;
348 delete pkt->req;
349 }
350 pendingCount--;
351 assert(pendingCount >= 0);
352 delete pkt;
353

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360 panic("Unknown memory command state.");
361}
362
363DmaDevice::~DmaDevice()
364{
365 if (dmaPort)
366 delete dmaPort;
367}
330 }
331 delete state;
332 delete pkt->req;
333 }
334 pendingCount--;
335 assert(pendingCount >= 0);
336 delete pkt;
337

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344 panic("Unknown memory command state.");
345}
346
347DmaDevice::~DmaDevice()
348{
349 if (dmaPort)
350 delete dmaPort;
351}
368
369
370Port *
371DmaDevice::getPort(const std::string &if_name, int idx)
372{
373 if (if_name == "dma") {
374 if (dmaPort != NULL)
375 fatal("%s: dma port already connected to %s",
376 name(), dmaPort->getPeer()->name());
377 dmaPort = new DmaPort(this, sys, params()->min_backoff_delay,
378 params()->max_backoff_delay);
379 return dmaPort;
380 }
381 return PioDevice::getPort(if_name, idx);
382}
383