io_device.cc (9015:7f4d25789dc4) | io_device.cc (9016:18093957a102) |
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1/* 2 * Copyright (c) 2012 ARM Limited 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software --- 27 unchanged lines hidden (view full) --- 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Ali Saidi 41 * Nathan Binkert 42 */ 43 | 1/* 2 * Copyright (c) 2012 ARM Limited 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software --- 27 unchanged lines hidden (view full) --- 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Ali Saidi 41 * Nathan Binkert 42 */ 43 |
44#include "base/chunk_generator.hh" | |
45#include "base/trace.hh" 46#include "debug/BusAddrRanges.hh" | 44#include "base/trace.hh" 45#include "debug/BusAddrRanges.hh" |
47#include "debug/DMA.hh" | |
48#include "dev/io_device.hh" 49#include "sim/system.hh" 50 51PioPort::PioPort(PioDevice *dev) | 46#include "dev/io_device.hh" 47#include "sim/system.hh" 48 49PioPort::PioPort(PioDevice *dev) |
52 : SimpleTimingPort(dev->name() + "-pioport", dev), device(dev) | 50 : SimpleTimingPort(dev->name() + "-pio", dev), device(dev) |
53{ 54} 55 | 51{ 52} 53 |
56 | |
57Tick 58PioPort::recvAtomic(PacketPtr pkt) 59{ 60 return pkt->isRead() ? device->read(pkt) : device->write(pkt); 61} 62 63AddrRangeList 64PioPort::getAddrRanges() 65{ 66 return device->getAddrRanges(); 67} 68 | 54Tick 55PioPort::recvAtomic(PacketPtr pkt) 56{ 57 return pkt->isRead() ? device->read(pkt) : device->write(pkt); 58} 59 60AddrRangeList 61PioPort::getAddrRanges() 62{ 63 return device->getAddrRanges(); 64} 65 |
69 | |
70PioDevice::PioDevice(const Params *p) 71 : MemObject(p), sys(p->system), pioPort(this) 72{} 73 74PioDevice::~PioDevice() 75{ 76} 77 --- 35 unchanged lines hidden (view full) --- 113BasicPioDevice::getAddrRanges() 114{ 115 assert(pioSize != 0); 116 AddrRangeList ranges; 117 DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize); 118 ranges.push_back(RangeSize(pioAddr, pioSize)); 119 return ranges; 120} | 66PioDevice::PioDevice(const Params *p) 67 : MemObject(p), sys(p->system), pioPort(this) 68{} 69 70PioDevice::~PioDevice() 71{ 72} 73 --- 35 unchanged lines hidden (view full) --- 109BasicPioDevice::getAddrRanges() 110{ 111 assert(pioSize != 0); 112 AddrRangeList ranges; 113 DPRINTF(BusAddrRanges, "registering range: %#x-%#x\n", pioAddr, pioSize); 114 ranges.push_back(RangeSize(pioAddr, pioSize)); 115 return ranges; 116} |
121 122 123DmaPort::DmaPort(MemObject *dev, System *s, Tick min_backoff, Tick max_backoff) 124 : MasterPort(dev->name() + "-dma", dev), device(dev), sys(s), 125 masterId(s->getMasterId(dev->name())), 126 pendingCount(0), actionInProgress(0), drainEvent(NULL), 127 backoffTime(0), minBackoffDelay(min_backoff), 128 maxBackoffDelay(max_backoff), inRetry(false), 129 backoffEvent(this) 130{ } 131 132bool 133DmaPort::recvTimingResp(PacketPtr pkt) 134{ 135 if (pkt->wasNacked()) { 136 DPRINTF(DMA, "Received nacked %s addr %#x\n", 137 pkt->cmdString(), pkt->getAddr()); 138 139 if (backoffTime < minBackoffDelay) 140 backoffTime = minBackoffDelay; 141 else if (backoffTime < maxBackoffDelay) 142 backoffTime <<= 1; 143 144 device->reschedule(backoffEvent, curTick() + backoffTime, true); 145 146 DPRINTF(DMA, "Backoff time set to %d ticks\n", backoffTime); 147 148 pkt->reinitNacked(); 149 queueDma(pkt, true); 150 } else if (pkt->senderState) { 151 DmaReqState *state; 152 backoffTime >>= 2; 153 154 DPRINTF(DMA, "Received response %s addr %#x size %#x\n", 155 pkt->cmdString(), pkt->getAddr(), pkt->req->getSize()); 156 state = dynamic_cast<DmaReqState*>(pkt->senderState); 157 pendingCount--; 158 159 assert(pendingCount >= 0); 160 assert(state); 161 162 // We shouldn't ever get a block in ownership state 163 assert(!(pkt->memInhibitAsserted() && !pkt->sharedAsserted())); 164 165 state->numBytes += pkt->req->getSize(); 166 assert(state->totBytes >= state->numBytes); 167 if (state->totBytes == state->numBytes) { 168 if (state->completionEvent) { 169 if (state->delay) 170 device->schedule(state->completionEvent, 171 curTick() + state->delay); 172 else 173 state->completionEvent->process(); 174 } 175 delete state; 176 } 177 delete pkt->req; 178 delete pkt; 179 180 if (pendingCount == 0 && drainEvent) { 181 drainEvent->process(); 182 drainEvent = NULL; 183 } 184 } else { 185 panic("Got packet without sender state... huh?\n"); 186 } 187 188 return true; 189} 190 191DmaDevice::DmaDevice(const Params *p) 192 : PioDevice(p), dmaPort(this, sys, params()->min_backoff_delay, 193 params()->max_backoff_delay) 194{ } 195 196void 197DmaDevice::init() 198{ 199 if (!dmaPort.isConnected()) 200 panic("DMA port of %s not connected to anything!", name()); 201 PioDevice::init(); 202} 203 204unsigned int 205DmaDevice::drain(Event *de) 206{ 207 unsigned int count; 208 count = pioPort.drain(de) + dmaPort.drain(de); 209 if (count) 210 changeState(Draining); 211 else 212 changeState(Drained); 213 return count; 214} 215 216unsigned int 217DmaPort::drain(Event *de) 218{ 219 if (pendingCount == 0) 220 return 0; 221 drainEvent = de; 222 return 1; 223} 224 225 226void 227DmaPort::recvRetry() 228{ 229 assert(transmitList.size()); 230 bool result = true; 231 do { 232 PacketPtr pkt = transmitList.front(); 233 DPRINTF(DMA, "Retry on %s addr %#x\n", 234 pkt->cmdString(), pkt->getAddr()); 235 result = sendTimingReq(pkt); 236 if (result) { 237 DPRINTF(DMA, "-- Done\n"); 238 transmitList.pop_front(); 239 inRetry = false; 240 } else { 241 inRetry = true; 242 DPRINTF(DMA, "-- Failed, queued\n"); 243 } 244 } while (!backoffTime && result && transmitList.size()); 245 246 if (transmitList.size() && backoffTime && !inRetry) { 247 DPRINTF(DMA, "Scheduling backoff for %d\n", curTick()+backoffTime); 248 if (!backoffEvent.scheduled()) 249 device->schedule(backoffEvent, backoffTime + curTick()); 250 } 251 DPRINTF(DMA, "TransmitList: %d, backoffTime: %d inRetry: %d es: %d\n", 252 transmitList.size(), backoffTime, inRetry, 253 backoffEvent.scheduled()); 254} 255 256 257void 258DmaPort::dmaAction(Packet::Command cmd, Addr addr, int size, Event *event, 259 uint8_t *data, Tick delay, Request::Flags flag) 260{ 261 assert(device->getState() == SimObject::Running); 262 263 DmaReqState *reqState = new DmaReqState(event, this, size, delay); 264 265 266 DPRINTF(DMA, "Starting DMA for addr: %#x size: %d sched: %d\n", addr, size, 267 event ? event->scheduled() : -1 ); 268 for (ChunkGenerator gen(addr, size, peerBlockSize()); 269 !gen.done(); gen.next()) { 270 Request *req = new Request(gen.addr(), gen.size(), flag, masterId); 271 PacketPtr pkt = new Packet(req, cmd); 272 273 // Increment the data pointer on a write 274 if (data) 275 pkt->dataStatic(data + gen.complete()); 276 277 pkt->senderState = reqState; 278 279 assert(pendingCount >= 0); 280 pendingCount++; 281 DPRINTF(DMA, "--Queuing DMA for addr: %#x size: %d\n", gen.addr(), 282 gen.size()); 283 queueDma(pkt); 284 } 285 286} 287 288void 289DmaPort::queueDma(PacketPtr pkt, bool front) 290{ 291 292 if (front) 293 transmitList.push_front(pkt); 294 else 295 transmitList.push_back(pkt); 296 sendDma(); 297} 298 299 300void 301DmaPort::sendDma() 302{ 303 // some kind of selction between access methods 304 // more work is going to have to be done to make 305 // switching actually work 306 assert(transmitList.size()); 307 PacketPtr pkt = transmitList.front(); 308 309 Enums::MemoryMode state = sys->getMemoryMode(); 310 if (state == Enums::timing) { 311 if (backoffEvent.scheduled() || inRetry) { 312 DPRINTF(DMA, "Can't send immediately, waiting for retry or backoff timer\n"); 313 return; 314 } 315 316 DPRINTF(DMA, "Attempting to send %s addr %#x\n", 317 pkt->cmdString(), pkt->getAddr()); 318 319 bool result; 320 do { 321 result = sendTimingReq(pkt); 322 if (result) { 323 transmitList.pop_front(); 324 DPRINTF(DMA, "-- Done\n"); 325 } else { 326 inRetry = true; 327 DPRINTF(DMA, "-- Failed: queued\n"); 328 } 329 } while (result && !backoffTime && transmitList.size()); 330 331 if (transmitList.size() && backoffTime && !inRetry && 332 !backoffEvent.scheduled()) { 333 DPRINTF(DMA, "-- Scheduling backoff timer for %d\n", 334 backoffTime+curTick()); 335 device->schedule(backoffEvent, backoffTime + curTick()); 336 } 337 } else if (state == Enums::atomic) { 338 transmitList.pop_front(); 339 340 Tick lat; 341 DPRINTF(DMA, "--Sending DMA for addr: %#x size: %d\n", 342 pkt->req->getPaddr(), pkt->req->getSize()); 343 lat = sendAtomic(pkt); 344 assert(pkt->senderState); 345 DmaReqState *state = dynamic_cast<DmaReqState*>(pkt->senderState); 346 assert(state); 347 state->numBytes += pkt->req->getSize(); 348 349 DPRINTF(DMA, "--Received response for DMA for addr: %#x size: %d nb: %d, tot: %d sched %d\n", 350 pkt->req->getPaddr(), pkt->req->getSize(), state->numBytes, 351 state->totBytes, 352 state->completionEvent ? state->completionEvent->scheduled() : 0 ); 353 354 if (state->totBytes == state->numBytes) { 355 if (state->completionEvent) { 356 assert(!state->completionEvent->scheduled()); 357 device->schedule(state->completionEvent, 358 curTick() + lat + state->delay); 359 } 360 delete state; 361 delete pkt->req; 362 } 363 pendingCount--; 364 assert(pendingCount >= 0); 365 delete pkt; 366 367 if (pendingCount == 0 && drainEvent) { 368 drainEvent->process(); 369 drainEvent = NULL; 370 } 371 372 } else 373 panic("Unknown memory command state."); 374} 375 376DmaDevice::~DmaDevice() 377{ 378} 379 380 381MasterPort & 382DmaDevice::getMasterPort(const std::string &if_name, int idx) 383{ 384 if (if_name == "dma") { 385 return dmaPort; 386 } 387 return PioDevice::getMasterPort(if_name, idx); 388} 389 | |