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/builder.hh"
36#include "sim/system.hh"
37
38
39PioPort::PioPort(PioDevice *dev, System *s, std::string pname)
40 : SimpleTimingPort(dev->name() + pname, dev), device(dev)
41{ }
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, AddrRangeList &snoop)
52{
53 snoop.clear();
54 device->addressRanges(resp);
55}
56
57
58PioDevice::~PioDevice()
59{
60 if (pioPort)
61 delete pioPort;
62}
63
64void
65PioDevice::init()
66{
67 if (!pioPort)
68 panic("Pio port not connected to anything!");
69 pioPort->sendStatusChange(Port::RangeChange);
70}
71
72
73unsigned int
74PioDevice::drain(Event *de)
75{
76 unsigned int count;
77 count = pioPort->drain(de);
78 if (count)
79 changeState(Draining);
80 else
81 changeState(Drained);
82 return count;
83}
84
85void
86BasicPioDevice::addressRanges(AddrRangeList &range_list)
87{
88 assert(pioSize != 0);
89 range_list.clear();
90 range_list.push_back(RangeSize(pioAddr, pioSize));
91}
92
93
94DmaPort::DmaPort(DmaDevice *dev, System *s)
95 : Port(dev->name() + "-dmaport", dev), device(dev), sys(s),
96 pendingCount(0), actionInProgress(0), drainEvent(NULL),
97 backoffTime(0), inRetry(false), backoffEvent(this)
98{ }
99
100bool
101DmaPort::recvTiming(PacketPtr pkt)
102{
103
104
105 if (pkt->result == Packet::Nacked) {
106 DPRINTF(DMA, "Received nacked Pkt %#x with State: %#x Addr: %#x\n",
107 pkt, pkt->senderState, pkt->getAddr());
108
109 if (backoffTime < device->minBackoffDelay)
110 backoffTime = device->minBackoffDelay;
111 else if (backoffTime < device->maxBackoffDelay)
112 backoffTime <<= 1;
113
| 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/builder.hh"
36#include "sim/system.hh"
37
38
39PioPort::PioPort(PioDevice *dev, System *s, std::string pname)
40 : SimpleTimingPort(dev->name() + pname, dev), device(dev)
41{ }
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, AddrRangeList &snoop)
52{
53 snoop.clear();
54 device->addressRanges(resp);
55}
56
57
58PioDevice::~PioDevice()
59{
60 if (pioPort)
61 delete pioPort;
62}
63
64void
65PioDevice::init()
66{
67 if (!pioPort)
68 panic("Pio port not connected to anything!");
69 pioPort->sendStatusChange(Port::RangeChange);
70}
71
72
73unsigned int
74PioDevice::drain(Event *de)
75{
76 unsigned int count;
77 count = pioPort->drain(de);
78 if (count)
79 changeState(Draining);
80 else
81 changeState(Drained);
82 return count;
83}
84
85void
86BasicPioDevice::addressRanges(AddrRangeList &range_list)
87{
88 assert(pioSize != 0);
89 range_list.clear();
90 range_list.push_back(RangeSize(pioAddr, pioSize));
91}
92
93
94DmaPort::DmaPort(DmaDevice *dev, System *s)
95 : Port(dev->name() + "-dmaport", dev), device(dev), sys(s),
96 pendingCount(0), actionInProgress(0), drainEvent(NULL),
97 backoffTime(0), inRetry(false), backoffEvent(this)
98{ }
99
100bool
101DmaPort::recvTiming(PacketPtr pkt)
102{
103
104
105 if (pkt->result == Packet::Nacked) {
106 DPRINTF(DMA, "Received nacked Pkt %#x with State: %#x Addr: %#x\n",
107 pkt, pkt->senderState, pkt->getAddr());
108
109 if (backoffTime < device->minBackoffDelay)
110 backoffTime = device->minBackoffDelay;
111 else if (backoffTime < device->maxBackoffDelay)
112 backoffTime <<= 1;
113
|
118
119 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime);
120
121 pkt->reinitNacked();
122 queueDma(pkt, true);
123 } else if (pkt->senderState) {
124 DmaReqState *state;
125 backoffTime >>= 2;
126
127 DPRINTF(DMA, "Received response Pkt %#x with State: %#x Addr: %#x size: %#x\n",
128 pkt, pkt->senderState, pkt->getAddr(), pkt->req->getSize());
129 state = dynamic_cast<DmaReqState*>(pkt->senderState);
130 pendingCount--;
131
132 assert(pendingCount >= 0);
133 assert(state);
134
135 state->numBytes += pkt->req->getSize();
136 assert(state->totBytes >= state->numBytes);
137 if (state->totBytes == state->numBytes) {
138 state->completionEvent->process();
139 delete state;
140 }
141 delete pkt->req;
142 delete pkt;
143
144 if (pendingCount == 0 && drainEvent) {
145 drainEvent->process();
146 drainEvent = NULL;
147 }
148 } else {
149 panic("Got packet without sender state... huh?\n");
150 }
151
152 return true;
153}
154
155DmaDevice::DmaDevice(Params *p)
156 : PioDevice(p), dmaPort(NULL), minBackoffDelay(p->min_backoff_delay),
157 maxBackoffDelay(p->max_backoff_delay)
158{ }
159
160
161unsigned int
162DmaDevice::drain(Event *de)
163{
164 unsigned int count;
165 count = pioPort->drain(de) + dmaPort->drain(de);
166 if (count)
167 changeState(Draining);
168 else
169 changeState(Drained);
170 return count;
171}
172
173unsigned int
174DmaPort::drain(Event *de)
175{
176 if (pendingCount == 0)
177 return 0;
178 drainEvent = de;
179 return 1;
180}
181
182
183void
184DmaPort::recvRetry()
185{
186 assert(transmitList.size());
187 PacketPtr pkt = transmitList.front();
188 bool result = true;
189 do {
190 DPRINTF(DMA, "Retry on Packet %#x with senderState: %#x\n",
191 pkt, pkt->senderState);
192 result = sendTiming(pkt);
193 if (result) {
194 DPRINTF(DMA, "-- Done\n");
195 transmitList.pop_front();
196 inRetry = false;
197 } else {
198 inRetry = true;
199 DPRINTF(DMA, "-- Failed, queued\n");
200 }
201 } while (!backoffTime && result && transmitList.size());
202
203 if (transmitList.size() && backoffTime && !inRetry) {
204 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick+backoffTime);
205 if (!backoffEvent.scheduled())
206 backoffEvent.schedule(backoffTime+curTick);
207 }
208 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n",
209 transmitList.size(), backoffTime, inRetry,
210 backoffEvent.scheduled());
211}
212
213
214void
215DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
216 uint8_t *data)
217{
218 assert(event);
219
220 assert(device->getState() == SimObject::Running);
221
222 DmaReqState *reqState = new DmaReqState(event, this, size);
223
224 for (ChunkGenerator gen(addr, size, peerBlockSize());
225 !gen.done(); gen.next()) {
226 Request *req = new Request(gen.addr(), gen.size(), 0);
227 PacketPtr pkt = new Packet(req, cmd, Packet::Broadcast);
228
229 // Increment the data pointer on a write
230 if (data)
231 pkt->dataStatic(data + gen.complete());
232
233 pkt->senderState = reqState;
234
235 assert(pendingCount >= 0);
236 pendingCount++;
237 queueDma(pkt);
238 }
239
240}
241
242void
243DmaPort::queueDma(PacketPtr pkt, bool front)
244{
245
246 if (front)
247 transmitList.push_front(pkt);
248 else
249 transmitList.push_back(pkt);
250 sendDma();
251}
252
253
254void
255DmaPort::sendDma()
256{
257 // some kind of selction between access methods
258 // more work is going to have to be done to make
259 // switching actually work
260 assert(transmitList.size());
261 PacketPtr pkt = transmitList.front();
262
263 System::MemoryMode state = sys->getMemoryMode();
264 if (state == System::Timing) {
265 if (backoffEvent.scheduled() || inRetry) {
266 DPRINTF(DMA, "Can't send immediately, waiting for retry or backoff timer\n");
267 return;
268 }
269
270 DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n",
271 pkt, pkt->getAddr());
272
273 bool result;
274 do {
275 result = sendTiming(pkt);
276 if (result) {
277 transmitList.pop_front();
278 DPRINTF(DMA, "-- Done\n");
279 } else {
280 inRetry = true;
281 DPRINTF(DMA, "-- Failed: queued\n");
282 }
283 } while (result && !backoffTime && transmitList.size());
284
285 if (transmitList.size() && backoffTime && !inRetry &&
286 !backoffEvent.scheduled()) {
287 backoffEvent.schedule(backoffTime+curTick);
288 }
289 } else if (state == System::Atomic) {
290 transmitList.pop_front();
291
292 Tick lat;
293 lat = sendAtomic(pkt);
294 assert(pkt->senderState);
295 DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
296 assert(state);
297
298 state->numBytes += pkt->req->getSize();
299 if (state->totBytes == state->numBytes) {
300 state->completionEvent->schedule(curTick + lat);
301 delete state;
302 delete pkt->req;
303 }
304 pendingCount--;
305 assert(pendingCount >= 0);
306 delete pkt;
307
308 if (pendingCount == 0 && drainEvent) {
309 drainEvent->process();
310 drainEvent = NULL;
311 }
312
313 } else
314 panic("Unknown memory command state.");
315}
316
317DmaDevice::~DmaDevice()
318{
319 if (dmaPort)
320 delete dmaPort;
321}
322
323
| 115
116 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime);
117
118 pkt->reinitNacked();
119 queueDma(pkt, true);
120 } else if (pkt->senderState) {
121 DmaReqState *state;
122 backoffTime >>= 2;
123
124 DPRINTF(DMA, "Received response Pkt %#x with State: %#x Addr: %#x size: %#x\n",
125 pkt, pkt->senderState, pkt->getAddr(), pkt->req->getSize());
126 state = dynamic_cast<DmaReqState*>(pkt->senderState);
127 pendingCount--;
128
129 assert(pendingCount >= 0);
130 assert(state);
131
132 state->numBytes += pkt->req->getSize();
133 assert(state->totBytes >= state->numBytes);
134 if (state->totBytes == state->numBytes) {
135 state->completionEvent->process();
136 delete state;
137 }
138 delete pkt->req;
139 delete pkt;
140
141 if (pendingCount == 0 && drainEvent) {
142 drainEvent->process();
143 drainEvent = NULL;
144 }
145 } else {
146 panic("Got packet without sender state... huh?\n");
147 }
148
149 return true;
150}
151
152DmaDevice::DmaDevice(Params *p)
153 : PioDevice(p), dmaPort(NULL), minBackoffDelay(p->min_backoff_delay),
154 maxBackoffDelay(p->max_backoff_delay)
155{ }
156
157
158unsigned int
159DmaDevice::drain(Event *de)
160{
161 unsigned int count;
162 count = pioPort->drain(de) + dmaPort->drain(de);
163 if (count)
164 changeState(Draining);
165 else
166 changeState(Drained);
167 return count;
168}
169
170unsigned int
171DmaPort::drain(Event *de)
172{
173 if (pendingCount == 0)
174 return 0;
175 drainEvent = de;
176 return 1;
177}
178
179
180void
181DmaPort::recvRetry()
182{
183 assert(transmitList.size());
184 PacketPtr pkt = transmitList.front();
185 bool result = true;
186 do {
187 DPRINTF(DMA, "Retry on Packet %#x with senderState: %#x\n",
188 pkt, pkt->senderState);
189 result = sendTiming(pkt);
190 if (result) {
191 DPRINTF(DMA, "-- Done\n");
192 transmitList.pop_front();
193 inRetry = false;
194 } else {
195 inRetry = true;
196 DPRINTF(DMA, "-- Failed, queued\n");
197 }
198 } while (!backoffTime && result && transmitList.size());
199
200 if (transmitList.size() && backoffTime && !inRetry) {
201 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick+backoffTime);
202 if (!backoffEvent.scheduled())
203 backoffEvent.schedule(backoffTime+curTick);
204 }
205 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n",
206 transmitList.size(), backoffTime, inRetry,
207 backoffEvent.scheduled());
208}
209
210
211void
212DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event,
213 uint8_t *data)
214{
215 assert(event);
216
217 assert(device->getState() == SimObject::Running);
218
219 DmaReqState *reqState = new DmaReqState(event, this, size);
220
221 for (ChunkGenerator gen(addr, size, peerBlockSize());
222 !gen.done(); gen.next()) {
223 Request *req = new Request(gen.addr(), gen.size(), 0);
224 PacketPtr pkt = new Packet(req, cmd, Packet::Broadcast);
225
226 // Increment the data pointer on a write
227 if (data)
228 pkt->dataStatic(data + gen.complete());
229
230 pkt->senderState = reqState;
231
232 assert(pendingCount >= 0);
233 pendingCount++;
234 queueDma(pkt);
235 }
236
237}
238
239void
240DmaPort::queueDma(PacketPtr pkt, bool front)
241{
242
243 if (front)
244 transmitList.push_front(pkt);
245 else
246 transmitList.push_back(pkt);
247 sendDma();
248}
249
250
251void
252DmaPort::sendDma()
253{
254 // some kind of selction between access methods
255 // more work is going to have to be done to make
256 // switching actually work
257 assert(transmitList.size());
258 PacketPtr pkt = transmitList.front();
259
260 System::MemoryMode state = sys->getMemoryMode();
261 if (state == System::Timing) {
262 if (backoffEvent.scheduled() || inRetry) {
263 DPRINTF(DMA, "Can't send immediately, waiting for retry or backoff timer\n");
264 return;
265 }
266
267 DPRINTF(DMA, "Attempting to send Packet %#x with addr: %#x\n",
268 pkt, pkt->getAddr());
269
270 bool result;
271 do {
272 result = sendTiming(pkt);
273 if (result) {
274 transmitList.pop_front();
275 DPRINTF(DMA, "-- Done\n");
276 } else {
277 inRetry = true;
278 DPRINTF(DMA, "-- Failed: queued\n");
279 }
280 } while (result && !backoffTime && transmitList.size());
281
282 if (transmitList.size() && backoffTime && !inRetry &&
283 !backoffEvent.scheduled()) {
284 backoffEvent.schedule(backoffTime+curTick);
285 }
286 } else if (state == System::Atomic) {
287 transmitList.pop_front();
288
289 Tick lat;
290 lat = sendAtomic(pkt);
291 assert(pkt->senderState);
292 DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState);
293 assert(state);
294
295 state->numBytes += pkt->req->getSize();
296 if (state->totBytes == state->numBytes) {
297 state->completionEvent->schedule(curTick + lat);
298 delete state;
299 delete pkt->req;
300 }
301 pendingCount--;
302 assert(pendingCount >= 0);
303 delete pkt;
304
305 if (pendingCount == 0 && drainEvent) {
306 drainEvent->process();
307 drainEvent = NULL;
308 }
309
310 } else
311 panic("Unknown memory command state.");
312}
313
314DmaDevice::~DmaDevice()
315{
316 if (dmaPort)
317 delete dmaPort;
318}
319
320
|