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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Ali Saidi
29 * Nathan Binkert
30 */
31
32#include "base/chunk_generator.hh"
33#include "base/trace.hh"
34#include "dev/io_device.hh"
35#include "sim/system.hh"
36
37
38PioPort::PioPort(PioDevice *dev, System *s, std::string pname)
39 : SimpleTimingPort(dev->name() + pname, dev), device(dev)
40{ }
41
42
43Tick
44PioPort::recvAtomic(PacketPtr pkt)
45{
46 return pkt->isRead() ? device->read(pkt) : device->write(pkt);
47}
48
49void
50PioPort::getDeviceAddressRanges(AddrRangeList &resp, bool &snoop)
51{
52 snoop = false;
53 device->addressRanges(resp);
54 for (AddrRangeIter i = resp.begin(); i != resp.end(); i++)
55 DPRINTF(BusAddrRanges, "Adding Range %#x-%#x\n", i->start, i->end);
56}
57
58
59PioDevice::PioDevice(const Params *p)
60 : MemObject(p), platform(p->platform), sys(p->system), pioPort(NULL)
61{}
62
63PioDevice::~PioDevice()
64{
65 if (pioPort)
66 delete pioPort;
67}
68
69void
70PioDevice::init()
71{
72 if (!pioPort)
73 panic("Pio port not connected to anything!");
74 pioPort->sendStatusChange(Port::RangeChange);
75}
76
77
78unsigned int
79PioDevice::drain(Event *de)
80{
81 unsigned int count;
82 count = pioPort->drain(de);
83 if (count)
84 changeState(Draining);
85 else
86 changeState(Drained);
87 return count;
88}
89
90BasicPioDevice::BasicPioDevice(const Params *p)
91 : PioDevice(p), pioAddr(p->pio_addr), pioSize(0),
92 pioDelay(p->pio_latency)
93{}
94
95void
96BasicPioDevice::addressRanges(AddrRangeList &range_list)
97{
98 assert(pioSize != 0);
99 range_list.clear();
100 DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize);
101 range_list.push_back(RangeSize(pioAddr, pioSize));
102}
103
104
105DmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff)
106 : Port(dev->name() + "-dmaport", dev), device(dev), sys(s),
107 pendingCount(0), actionInProgress(0), drainEvent(NULL),
108 backoffTime(0), minBackoffDelay(min_backoff),
109 maxBackoffDelay(max_backoff), inRetry(false), backoffEvent(this)
110{ }
111
112bool
113DmaPort::recvTiming(PacketPtr pkt)
114{
115 if (pkt->wasNacked()) {
116 DPRINTF(DMA, "Received nacked %s addr %#x\n",
117 pkt->cmdString(), pkt->getAddr());
118
119 if (backoffTime < minBackoffDelay)
120 backoffTime = minBackoffDelay;
121 else if (backoffTime < maxBackoffDelay)
122 backoffTime <<= 1;
123
| 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;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Ali Saidi
29 * Nathan Binkert
30 */
31
32#include "base/chunk_generator.hh"
33#include "base/trace.hh"
34#include "dev/io_device.hh"
35#include "sim/system.hh"
36
37
38PioPort::PioPort(PioDevice *dev, System *s, std::string pname)
39 : SimpleTimingPort(dev->name() + pname, dev), device(dev)
40{ }
41
42
43Tick
44PioPort::recvAtomic(PacketPtr pkt)
45{
46 return pkt->isRead() ? device->read(pkt) : device->write(pkt);
47}
48
49void
50PioPort::getDeviceAddressRanges(AddrRangeList &resp, bool &snoop)
51{
52 snoop = false;
53 device->addressRanges(resp);
54 for (AddrRangeIter i = resp.begin(); i != resp.end(); i++)
55 DPRINTF(BusAddrRanges, "Adding Range %#x-%#x\n", i->start, i->end);
56}
57
58
59PioDevice::PioDevice(const Params *p)
60 : MemObject(p), platform(p->platform), sys(p->system), pioPort(NULL)
61{}
62
63PioDevice::~PioDevice()
64{
65 if (pioPort)
66 delete pioPort;
67}
68
69void
70PioDevice::init()
71{
72 if (!pioPort)
73 panic("Pio port not connected to anything!");
74 pioPort->sendStatusChange(Port::RangeChange);
75}
76
77
78unsigned int
79PioDevice::drain(Event *de)
80{
81 unsigned int count;
82 count = pioPort->drain(de);
83 if (count)
84 changeState(Draining);
85 else
86 changeState(Drained);
87 return count;
88}
89
90BasicPioDevice::BasicPioDevice(const Params *p)
91 : PioDevice(p), pioAddr(p->pio_addr), pioSize(0),
92 pioDelay(p->pio_latency)
93{}
94
95void
96BasicPioDevice::addressRanges(AddrRangeList &range_list)
97{
98 assert(pioSize != 0);
99 range_list.clear();
100 DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize);
101 range_list.push_back(RangeSize(pioAddr, pioSize));
102}
103
104
105DmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff)
106 : Port(dev->name() + "-dmaport", dev), device(dev), sys(s),
107 pendingCount(0), actionInProgress(0), drainEvent(NULL),
108 backoffTime(0), minBackoffDelay(min_backoff),
109 maxBackoffDelay(max_backoff), inRetry(false), backoffEvent(this)
110{ }
111
112bool
113DmaPort::recvTiming(PacketPtr pkt)
114{
115 if (pkt->wasNacked()) {
116 DPRINTF(DMA, "Received nacked %s addr %#x\n",
117 pkt->cmdString(), pkt->getAddr());
118
119 if (backoffTime < minBackoffDelay)
120 backoffTime = minBackoffDelay;
121 else if (backoffTime < maxBackoffDelay)
122 backoffTime <<= 1;
123
|
124 reschedule(backoffEvent, curTick + backoffTime, true);
| 124 reschedule(backoffEvent, curTick() + backoffTime, true);
|
125
126 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime);
127
128 pkt->reinitNacked();
129 queueDma(pkt, true);
130 } else if (pkt->senderState) {
131 DmaReqState *state;
132 backoffTime >>= 2;
133
134 DPRINTF(DMA, "Received response %s addr %#x size %#x\n",
135 pkt->cmdString(), pkt->getAddr(), pkt->req->getSize());
136 state = dynamic_cast<DmaReqState*>(pkt->senderState);
137 pendingCount--;
138
139 assert(pendingCount >= 0);
140 assert(state);
141
142 state->numBytes += pkt->req->getSize();
143 assert(state->totBytes >= state->numBytes);
144 if (state->totBytes == state->numBytes) {
145 if (state->completionEvent) {
146 if (state->delay)
| 125
126 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime);
127
128 pkt->reinitNacked();
129 queueDma(pkt, true);
130 } else if (pkt->senderState) {
131 DmaReqState *state;
132 backoffTime >>= 2;
133
134 DPRINTF(DMA, "Received response %s addr %#x size %#x\n",
135 pkt->cmdString(), pkt->getAddr(), pkt->req->getSize());
136 state = dynamic_cast<DmaReqState*>(pkt->senderState);
137 pendingCount--;
138
139 assert(pendingCount >= 0);
140 assert(state);
141
142 state->numBytes += pkt->req->getSize();
143 assert(state->totBytes >= state->numBytes);
144 if (state->totBytes == state->numBytes) {
145 if (state->completionEvent) {
146 if (state->delay)
|
147 schedule(state->completionEvent, curTick + state->delay);
| 147 schedule(state->completionEvent, curTick() + state->delay);
|
148 else
149 state->completionEvent->process();
150 }
151 delete state;
152 }
153 delete pkt->req;
154 delete pkt;
155
156 if (pendingCount == 0 && drainEvent) {
157 drainEvent->process();
158 drainEvent = NULL;
159 }
160 } else {
161 panic("Got packet without sender state... huh?\n");
162 }
163
164 return true;
165}
166
167DmaDevice::DmaDevice(const Params *p)
168 : PioDevice(p), dmaPort(NULL)
169{ }
170
171
172unsigned int
173DmaDevice::drain(Event *de)
174{
175 unsigned int count;
176 count = pioPort->drain(de) + dmaPort->drain(de);
177 if (count)
178 changeState(Draining);
179 else
180 changeState(Drained);
181 return count;
182}
183
184unsigned int
185DmaPort::drain(Event *de)
186{
187 if (pendingCount == 0)
188 return 0;
189 drainEvent = de;
190 return 1;
191}
192
193
194void
195DmaPort::recvRetry()
196{
197 assert(transmitList.size());
198 bool result = true;
199 do {
200 PacketPtr pkt = transmitList.front();
201 DPRINTF(DMA, "Retry on %s addr %#x\n",
202 pkt->cmdString(), pkt->getAddr());
203 result = sendTiming(pkt);
204 if (result) {
205 DPRINTF(DMA, "-- Done\n");
206 transmitList.pop_front();
207 inRetry = false;
208 } else {
209 inRetry = true;
210 DPRINTF(DMA, "-- Failed, queued\n");
211 }
212 } while (!backoffTime && result && transmitList.size());
213
214 if (transmitList.size() && backoffTime && !inRetry) {
| 148 else
149 state->completionEvent->process();
150 }
151 delete state;
152 }
153 delete pkt->req;
154 delete pkt;
155
156 if (pendingCount == 0 && drainEvent) {
157 drainEvent->process();
158 drainEvent = NULL;
159 }
160 } else {
161 panic("Got packet without sender state... huh?\n");
162 }
163
164 return true;
165}
166
167DmaDevice::DmaDevice(const Params *p)
168 : PioDevice(p), dmaPort(NULL)
169{ }
170
171
172unsigned int
173DmaDevice::drain(Event *de)
174{
175 unsigned int count;
176 count = pioPort->drain(de) + dmaPort->drain(de);
177 if (count)
178 changeState(Draining);
179 else
180 changeState(Drained);
181 return count;
182}
183
184unsigned int
185DmaPort::drain(Event *de)
186{
187 if (pendingCount == 0)
188 return 0;
189 drainEvent = de;
190 return 1;
191}
192
193
194void
195DmaPort::recvRetry()
196{
197 assert(transmitList.size());
198 bool result = true;
199 do {
200 PacketPtr pkt = transmitList.front();
201 DPRINTF(DMA, "Retry on %s addr %#x\n",
202 pkt->cmdString(), pkt->getAddr());
203 result = sendTiming(pkt);
204 if (result) {
205 DPRINTF(DMA, "-- Done\n");
206 transmitList.pop_front();
207 inRetry = false;
208 } else {
209 inRetry = true;
210 DPRINTF(DMA, "-- Failed, queued\n");
211 }
212 } while (!backoffTime && result && transmitList.size());
213
214 if (transmitList.size() && backoffTime && !inRetry) {
|
215 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick+backoffTime);
| 215 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick()+backoffTime);
|
216 if (!backoffEvent.scheduled())
| 216 if (!backoffEvent.scheduled())
|
217 schedule(backoffEvent, backoffTime + curTick);
| 217 schedule(backoffEvent, backoffTime + curTick());
|
218 }
219 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n",
220 transmitList.size(), backoffTime, inRetry,
221 backoffEvent.scheduled());
222}
223
224
225void
226DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
227 uint8_t *data, Tick delay, Request::Flags flag)
228{
229 assert(device->getState() == SimObject::Running);
230
231 DmaReqState *reqState = new DmaReqState(event, this, size, delay);
232
233
234 DPRINTF(DMA, "Starting DMA for addr: %#x size: %d sched: %d\n", addr, size,
235 event ? event->scheduled() : -1 );
236 for (ChunkGenerator gen(addr, size, peerBlockSize());
237 !gen.done(); gen.next()) {
238 Request *req = new Request(gen.addr(), gen.size(), flag);
239 PacketPtr pkt = new Packet(req, cmd, Packet::Broadcast);
240
241 // Increment the data pointer on a write
242 if (data)
243 pkt->dataStatic(data + gen.complete());
244
245 pkt->senderState = reqState;
246
247 assert(pendingCount >= 0);
248 pendingCount++;
249 DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(),
250 gen.size());
251 queueDma(pkt);
252 }
253
254}
255
256void
257DmaPort::queueDma(PacketPtr pkt, bool front)
258{
259
260 if (front)
261 transmitList.push_front(pkt);
262 else
263 transmitList.push_back(pkt);
264 sendDma();
265}
266
267
268void
269DmaPort::sendDma()
270{
271 // some kind of selction between access methods
272 // more work is going to have to be done to make
273 // switching actually work
274 assert(transmitList.size());
275 PacketPtr pkt = transmitList.front();
276
277 Enums::MemoryMode state = sys->getMemoryMode();
278 if (state == Enums::timing) {
279 if (backoffEvent.scheduled() || inRetry) {
280 DPRINTF(DMA, "Can't send immediately, waiting for retry or backoff timer\n");
281 return;
282 }
283
284 DPRINTF(DMA, "Attempting to send %s addr %#x\n",
285 pkt->cmdString(), pkt->getAddr());
286
287 bool result;
288 do {
289 result = sendTiming(pkt);
290 if (result) {
291 transmitList.pop_front();
292 DPRINTF(DMA, "-- Done\n");
293 } else {
294 inRetry = true;
295 DPRINTF(DMA, "-- Failed: queued\n");
296 }
297 } while (result && !backoffTime && transmitList.size());
298
299 if (transmitList.size() && backoffTime && !inRetry &&
300 !backoffEvent.scheduled()) {
301 DPRINTF(DMA, "-- Scheduling backoff timer for %d\n",
| 218 }
219 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n",
220 transmitList.size(), backoffTime, inRetry,
221 backoffEvent.scheduled());
222}
223
224
225void
226DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
227 uint8_t *data, Tick delay, Request::Flags flag)
228{
229 assert(device->getState() == SimObject::Running);
230
231 DmaReqState *reqState = new DmaReqState(event, this, size, delay);
232
233
234 DPRINTF(DMA, "Starting DMA for addr: %#x size: %d sched: %d\n", addr, size,
235 event ? event->scheduled() : -1 );
236 for (ChunkGenerator gen(addr, size, peerBlockSize());
237 !gen.done(); gen.next()) {
238 Request *req = new Request(gen.addr(), gen.size(), flag);
239 PacketPtr pkt = new Packet(req, cmd, Packet::Broadcast);
240
241 // Increment the data pointer on a write
242 if (data)
243 pkt->dataStatic(data + gen.complete());
244
245 pkt->senderState = reqState;
246
247 assert(pendingCount >= 0);
248 pendingCount++;
249 DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(),
250 gen.size());
251 queueDma(pkt);
252 }
253
254}
255
256void
257DmaPort::queueDma(PacketPtr pkt, bool front)
258{
259
260 if (front)
261 transmitList.push_front(pkt);
262 else
263 transmitList.push_back(pkt);
264 sendDma();
265}
266
267
268void
269DmaPort::sendDma()
270{
271 // some kind of selction between access methods
272 // more work is going to have to be done to make
273 // switching actually work
274 assert(transmitList.size());
275 PacketPtr pkt = transmitList.front();
276
277 Enums::MemoryMode state = sys->getMemoryMode();
278 if (state == Enums::timing) {
279 if (backoffEvent.scheduled() || inRetry) {
280 DPRINTF(DMA, "Can't send immediately, waiting for retry or backoff timer\n");
281 return;
282 }
283
284 DPRINTF(DMA, "Attempting to send %s addr %#x\n",
285 pkt->cmdString(), pkt->getAddr());
286
287 bool result;
288 do {
289 result = sendTiming(pkt);
290 if (result) {
291 transmitList.pop_front();
292 DPRINTF(DMA, "-- Done\n");
293 } else {
294 inRetry = true;
295 DPRINTF(DMA, "-- Failed: queued\n");
296 }
297 } while (result && !backoffTime && transmitList.size());
298
299 if (transmitList.size() && backoffTime && !inRetry &&
300 !backoffEvent.scheduled()) {
301 DPRINTF(DMA, "-- Scheduling backoff timer for %d\n",
|
302 backoffTime+curTick);
303 schedule(backoffEvent, backoffTime + curTick);
| 302 backoffTime+curTick());
303 schedule(backoffEvent, backoffTime + curTick());
|
304 }
305 } else if (state == Enums::atomic) {
306 transmitList.pop_front();
307
308 Tick lat;
309 DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n",
310 pkt->req->getPaddr(), pkt->req->getSize());
311 lat = sendAtomic(pkt);
312 assert(pkt->senderState);
313 DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
314 assert(state);
315 state->numBytes += pkt->req->getSize();
316
317 DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n",
318 pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes,
319 state->totBytes,
320 state->completionEvent ? state->completionEvent->scheduled() : 0 );
321
322 if (state->totBytes == state->numBytes) {
323 if (state->completionEvent) {
324 assert(!state->completionEvent->scheduled());
| 304 }
305 } else if (state == Enums::atomic) {
306 transmitList.pop_front();
307
308 Tick lat;
309 DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n",
310 pkt->req->getPaddr(), pkt->req->getSize());
311 lat = sendAtomic(pkt);
312 assert(pkt->senderState);
313 DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
314 assert(state);
315 state->numBytes += pkt->req->getSize();
316
317 DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n",
318 pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes,
319 state->totBytes,
320 state->completionEvent ? state->completionEvent->scheduled() : 0 );
321
322 if (state->totBytes == state->numBytes) {
323 if (state->completionEvent) {
324 assert(!state->completionEvent->scheduled());
|
325 schedule(state->completionEvent, curTick + lat + state->delay);
| 325 schedule(state->completionEvent, curTick() + lat + state->delay);
|
326 }
327 delete state;
328 delete pkt->req;
329 }
330 pendingCount--;
331 assert(pendingCount >= 0);
332 delete pkt;
333
334 if (pendingCount == 0 && drainEvent) {
335 drainEvent->process();
336 drainEvent = NULL;
337 }
338
339 } else
340 panic("Unknown memory command state.");
341}
342
343DmaDevice::~DmaDevice()
344{
345 if (dmaPort)
346 delete dmaPort;
347}
| 326 }
327 delete state;
328 delete pkt->req;
329 }
330 pendingCount--;
331 assert(pendingCount >= 0);
332 delete pkt;
333
334 if (pendingCount == 0 && drainEvent) {
335 drainEvent->process();
336 drainEvent = NULL;
337 }
338
339 } else
340 panic("Unknown memory command state.");
341}
342
343DmaDevice::~DmaDevice()
344{
345 if (dmaPort)
346 delete dmaPort;
347}
|