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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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
139 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)
167 device->schedule(state->completionEvent,
168 curTick() + state->delay);
169 else
170 state->completionEvent->process();
171 }
172 delete state;
173 }
174 delete pkt->req;
175 delete pkt;
176

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230 inRetry = true;
231 DPRINTF(DMA, "-- Failed, queued\n");
232 }
233 } while (!backoffTime && result && transmitList.size());
234
235 if (transmitList.size() && backoffTime && !inRetry) {
236 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick()+backoffTime);
237 if (!backoffEvent.scheduled())
238 device->schedule(backoffEvent, backoffTime + curTick());
239 }
240 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n",
241 transmitList.size(), backoffTime, inRetry,
242 backoffEvent.scheduled());
243}
244
245
246void

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

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338 DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n",
339 pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes,
340 state->totBytes,
341 state->completionEvent ? state->completionEvent->scheduled() : 0 );
342
343 if (state->totBytes == state->numBytes) {
344 if (state->completionEvent) {
345 assert(!state->completionEvent->scheduled());
346 device->schedule(state->completionEvent,
347 curTick() + lat + state->delay);
348 }
349 delete state;
350 delete pkt->req;
351 }
352 pendingCount--;
353 assert(pendingCount >= 0);
354 delete pkt;
355

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