hw/dma/xilinx_axidma.c

   1 /*
   2  * QEMU model of Xilinx AXI-DMA block.
   3  *
   4  * Copyright (c) 2011 Edgar E. Iglesias.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "hw/sysbus.h"
  26 #include "qemu/timer.h"
  27 #include "hw/ptimer.h"
  28 #include "qemu/log.h"
  29 #include "qapi/qmp/qerror.h"
  30 #include "qemu/main-loop.h"
  31
  32 #include "hw/stream.h"
  33
  34 #define D(x)
  35
  36 #define TYPE_XILINX_AXI_DMA "xlnx.axi-dma"
  37 #define TYPE_XILINX_AXI_DMA_DATA_STREAM "xilinx-axi-dma-data-stream"
  38 #define TYPE_XILINX_AXI_DMA_CONTROL_STREAM "xilinx-axi-dma-control-stream"
  39
  40 #define XILINX_AXI_DMA(obj) \
  41      OBJECT_CHECK(XilinxAXIDMA, (obj), TYPE_XILINX_AXI_DMA)
  42
  43 #define XILINX_AXI_DMA_DATA_STREAM(obj) \
  44      OBJECT_CHECK(XilinxAXIDMAStreamSlave, (obj),\
  45      TYPE_XILINX_AXI_DMA_DATA_STREAM)
  46
  47 #define XILINX_AXI_DMA_CONTROL_STREAM(obj) \
  48      OBJECT_CHECK(XilinxAXIDMAStreamSlave, (obj),\
  49      TYPE_XILINX_AXI_DMA_CONTROL_STREAM)
  50
  51 #define R_DMACR             (0x00 / 4)
  52 #define R_DMASR             (0x04 / 4)
  53 #define R_CURDESC           (0x08 / 4)
  54 #define R_TAILDESC          (0x10 / 4)
  55 #define R_MAX               (0x30 / 4)
  56
  57 #define CONTROL_PAYLOAD_WORDS 5
  58 #define CONTROL_PAYLOAD_SIZE (CONTROL_PAYLOAD_WORDS * (sizeof(uint32_t)))
  59
  60 typedef struct XilinxAXIDMA XilinxAXIDMA;
  61 typedef struct XilinxAXIDMAStreamSlave XilinxAXIDMAStreamSlave;
  62
  63 enum {
  64     DMACR_RUNSTOP = 1,
  65     DMACR_TAILPTR_MODE = 2,
  66     DMACR_RESET = 4
  67 };
  68
  69 enum {
  70     DMASR_HALTED = 1,
  71     DMASR_IDLE  = 2,
  72     DMASR_IOC_IRQ  = 1 << 12,
  73     DMASR_DLY_IRQ  = 1 << 13,
  74
  75     DMASR_IRQ_MASK = 7 << 12
  76 };
  77
  78 struct SDesc {
  79     uint64_t nxtdesc;
  80     uint64_t buffer_address;
  81     uint64_t reserved;
  82     uint32_t control;
  83     uint32_t status;
  84     uint8_t app[CONTROL_PAYLOAD_SIZE];
  85 };
  86
  87 enum {
  88     SDESC_CTRL_EOF = (1 << 26),
  89     SDESC_CTRL_SOF = (1 << 27),
  90
  91     SDESC_CTRL_LEN_MASK = (1 << 23) - 1
  92 };
  93
  94 enum {
  95     SDESC_STATUS_EOF = (1 << 26),
  96     SDESC_STATUS_SOF_BIT = 27,
  97     SDESC_STATUS_SOF = (1 << SDESC_STATUS_SOF_BIT),
  98     SDESC_STATUS_COMPLETE = (1 << 31)
  99 };
 100
 101 struct Stream {
 102     QEMUBH *bh;
 103     ptimer_state *ptimer;
 104     qemu_irq irq;
 105
 106     int nr;
 107
 108     struct SDesc desc;
 109     int pos;
 110     unsigned int complete_cnt;
 111     uint32_t regs[R_MAX];
 112     uint8_t app[20];
 113 };
 114
 115 struct XilinxAXIDMAStreamSlave {
 116     Object parent;
 117
 118     struct XilinxAXIDMA *dma;
 119 };
 120
 121 struct XilinxAXIDMA {
 122     SysBusDevice busdev;
 123     MemoryRegion iomem;
 124     uint32_t freqhz;
 125     StreamSlave *tx_data_dev;
 126     StreamSlave *tx_control_dev;
 127     XilinxAXIDMAStreamSlave rx_data_dev;
 128     XilinxAXIDMAStreamSlave rx_control_dev;
 129
 130     struct Stream streams[2];
 131
 132     StreamCanPushNotifyFn notify;
 133     void *notify_opaque;
 134 };
 135
 136 /*
 137  * Helper calls to extract info from desriptors and other trivial
 138  * state from regs.
 139  */
 140 static inline int stream_desc_sof(struct SDesc *d)
 141 {
 142     return d->control & SDESC_CTRL_SOF;
 143 }
 144
 145 static inline int stream_desc_eof(struct SDesc *d)
 146 {
 147     return d->control & SDESC_CTRL_EOF;
 148 }
 149
 150 static inline int stream_resetting(struct Stream *s)
 151 {
 152     return !!(s->regs[R_DMACR] & DMACR_RESET);
 153 }
 154
 155 static inline int stream_running(struct Stream *s)
 156 {
 157     return s->regs[R_DMACR] & DMACR_RUNSTOP;
 158 }
 159
 160 static inline int stream_halted(struct Stream *s)
 161 {
 162     return s->regs[R_DMASR] & DMASR_HALTED;
 163 }
 164
 165 static inline int stream_idle(struct Stream *s)
 166 {
 167     return !!(s->regs[R_DMASR] & DMASR_IDLE);
 168 }
 169
 170 static void stream_reset(struct Stream *s)
 171 {
 172     s->regs[R_DMASR] = DMASR_HALTED;  /* starts up halted.  */
 173     s->regs[R_DMACR] = 1 << 16; /* Starts with one in compl threshold.  */
 174 }
 175
 176 /* Map an offset addr into a channel index.  */
 177 static inline int streamid_from_addr(hwaddr addr)
 178 {
 179     int sid;
 180
 181     sid = addr / (0x30);
 182     sid &= 1;
 183     return sid;
 184 }
 185
 186 #ifdef DEBUG_ENET
 187 static void stream_desc_show(struct SDesc *d)
 188 {
 189     qemu_log("buffer_addr  = " PRIx64 "\n", d->buffer_address);
 190     qemu_log("nxtdesc      = " PRIx64 "\n", d->nxtdesc);
 191     qemu_log("control      = %x\n", d->control);
 192     qemu_log("status       = %x\n", d->status);
 193 }
 194 #endif
 195
 196 static void stream_desc_load(struct Stream *s, hwaddr addr)
 197 {
 198     struct SDesc *d = &s->desc;
 199
 200     cpu_physical_memory_read(addr, d, sizeof *d);
 201
 202     /* Convert from LE into host endianness.  */
 203     d->buffer_address = le64_to_cpu(d->buffer_address);
 204     d->nxtdesc = le64_to_cpu(d->nxtdesc);
 205     d->control = le32_to_cpu(d->control);
 206     d->status = le32_to_cpu(d->status);
 207 }
 208
 209 static void stream_desc_store(struct Stream *s, hwaddr addr)
 210 {
 211     struct SDesc *d = &s->desc;
 212
 213     /* Convert from host endianness into LE.  */
 214     d->buffer_address = cpu_to_le64(d->buffer_address);
 215     d->nxtdesc = cpu_to_le64(d->nxtdesc);
 216     d->control = cpu_to_le32(d->control);
 217     d->status = cpu_to_le32(d->status);
 218     cpu_physical_memory_write(addr, d, sizeof *d);
 219 }
 220
 221 static void stream_update_irq(struct Stream *s)
 222 {
 223     unsigned int pending, mask, irq;
 224
 225     pending = s->regs[R_DMASR] & DMASR_IRQ_MASK;
 226     mask = s->regs[R_DMACR] & DMASR_IRQ_MASK;
 227
 228     irq = pending & mask;
 229
 230     qemu_set_irq(s->irq, !!irq);
 231 }
 232
 233 static void stream_reload_complete_cnt(struct Stream *s)
 234 {
 235     unsigned int comp_th;
 236     comp_th = (s->regs[R_DMACR] >> 16) & 0xff;
 237     s->complete_cnt = comp_th;
 238 }
 239
 240 static void timer_hit(void *opaque)
 241 {
 242     struct Stream *s = opaque;
 243
 244     stream_reload_complete_cnt(s);
 245     s->regs[R_DMASR] |= DMASR_DLY_IRQ;
 246     stream_update_irq(s);
 247 }
 248
 249 static void stream_complete(struct Stream *s)
 250 {
 251     unsigned int comp_delay;
 252
 253     /* Start the delayed timer.  */
 254     comp_delay = s->regs[R_DMACR] >> 24;
 255     if (comp_delay) {
 256         ptimer_stop(s->ptimer);
 257         ptimer_set_count(s->ptimer, comp_delay);
 258         ptimer_run(s->ptimer, 1);
 259     }
 260
 261     s->complete_cnt--;
 262     if (s->complete_cnt == 0) {
 263         /* Raise the IOC irq.  */
 264         s->regs[R_DMASR] |= DMASR_IOC_IRQ;
 265         stream_reload_complete_cnt(s);
 266     }
 267 }
 268
 269 static void stream_process_mem2s(struct Stream *s, StreamSlave *tx_data_dev,
 270                                  StreamSlave *tx_control_dev)
 271 {
 272     uint32_t prev_d;
 273     unsigned char txbuf[16 * 1024];
 274     unsigned int txlen;
 275
 276     if (!stream_running(s) || stream_idle(s)) {
 277         return;
 278     }
 279
 280     while (1) {
 281         stream_desc_load(s, s->regs[R_CURDESC]);
 282
 283         if (s->desc.status & SDESC_STATUS_COMPLETE) {
 284             s->regs[R_DMASR] |= DMASR_HALTED;
 285             break;
 286         }
 287
 288         if (stream_desc_sof(&s->desc)) {
 289             s->pos = 0;
 290             stream_push(tx_control_dev, s->desc.app, sizeof(s->desc.app));
 291         }
 292
 293         txlen = s->desc.control & SDESC_CTRL_LEN_MASK;
 294         if ((txlen + s->pos) > sizeof txbuf) {
 295             hw_error("%s: too small internal txbuf! %d\n", __func__,
 296                      txlen + s->pos);
 297         }
 298
 299         cpu_physical_memory_read(s->desc.buffer_address,
 300                                  txbuf + s->pos, txlen);
 301         s->pos += txlen;
 302
 303         if (stream_desc_eof(&s->desc)) {
 304             stream_push(tx_data_dev, txbuf, s->pos);
 305             s->pos = 0;
 306             stream_complete(s);
 307         }
 308
 309         /* Update the descriptor.  */
 310         s->desc.status = txlen | SDESC_STATUS_COMPLETE;
 311         stream_desc_store(s, s->regs[R_CURDESC]);
 312
 313         /* Advance.  */
 314         prev_d = s->regs[R_CURDESC];
 315         s->regs[R_CURDESC] = s->desc.nxtdesc;
 316         if (prev_d == s->regs[R_TAILDESC]) {
 317             s->regs[R_DMASR] |= DMASR_IDLE;
 318             break;
 319         }
 320     }
 321 }
 322
 323 static size_t stream_process_s2mem(struct Stream *s, unsigned char *buf,
 324                                    size_t len)
 325 {
 326     uint32_t prev_d;
 327     unsigned int rxlen;
 328     size_t pos = 0;
 329     int sof = 1;
 330
 331     if (!stream_running(s) || stream_idle(s)) {
 332         return 0;
 333     }
 334
 335     while (len) {
 336         stream_desc_load(s, s->regs[R_CURDESC]);
 337
 338         if (s->desc.status & SDESC_STATUS_COMPLETE) {
 339             s->regs[R_DMASR] |= DMASR_HALTED;
 340             break;
 341         }
 342
 343         rxlen = s->desc.control & SDESC_CTRL_LEN_MASK;
 344         if (rxlen > len) {
 345             /* It fits.  */
 346             rxlen = len;
 347         }
 348
 349         cpu_physical_memory_write(s->desc.buffer_address, buf + pos, rxlen);
 350         len -= rxlen;
 351         pos += rxlen;
 352
 353         /* Update the descriptor.  */
 354         if (!len) {
 355             stream_complete(s);
 356             memcpy(s->desc.app, s->app, sizeof(s->desc.app));
 357             s->desc.status |= SDESC_STATUS_EOF;
 358         }
 359
 360         s->desc.status |= sof << SDESC_STATUS_SOF_BIT;
 361         s->desc.status |= SDESC_STATUS_COMPLETE;
 362         stream_desc_store(s, s->regs[R_CURDESC]);
 363         sof = 0;
 364
 365         /* Advance.  */
 366         prev_d = s->regs[R_CURDESC];
 367         s->regs[R_CURDESC] = s->desc.nxtdesc;
 368         if (prev_d == s->regs[R_TAILDESC]) {
 369             s->regs[R_DMASR] |= DMASR_IDLE;
 370             break;
 371         }
 372     }
 373
 374     return pos;
 375 }
 376
 377 static void xilinx_axidma_reset(DeviceState *dev)
 378 {
 379     int i;
 380     XilinxAXIDMA *s = XILINX_AXI_DMA(dev);
 381
 382     for (i = 0; i < 2; i++) {
 383         stream_reset(&s->streams[i]);
 384     }
 385 }
 386
 387 static size_t
 388 xilinx_axidma_control_stream_push(StreamSlave *obj, unsigned char *buf,
 389                                   size_t len)
 390 {
 391     XilinxAXIDMAStreamSlave *cs = XILINX_AXI_DMA_CONTROL_STREAM(obj);
 392     struct Stream *s = &cs->dma->streams[1];
 393
 394     if (len != CONTROL_PAYLOAD_SIZE) {
 395         hw_error("AXI DMA requires %d byte control stream payload\n",
 396                  (int)CONTROL_PAYLOAD_SIZE);
 397     }
 398
 399     memcpy(s->app, buf, len);
 400     return len;
 401 }
 402
 403 static bool
 404 xilinx_axidma_data_stream_can_push(StreamSlave *obj,
 405                                    StreamCanPushNotifyFn notify,
 406                                    void *notify_opaque)
 407 {
 408     XilinxAXIDMAStreamSlave *ds = XILINX_AXI_DMA_DATA_STREAM(obj);
 409     struct Stream *s = &ds->dma->streams[1];
 410
 411     if (!stream_running(s) || stream_idle(s)) {
 412         ds->dma->notify = notify;
 413         ds->dma->notify_opaque = notify_opaque;
 414         return false;
 415     }
 416
 417     return true;
 418 }
 419
 420 static size_t
 421 xilinx_axidma_data_stream_push(StreamSlave *obj, unsigned char *buf, size_t len)
 422 {
 423     XilinxAXIDMAStreamSlave *ds = XILINX_AXI_DMA_DATA_STREAM(obj);
 424     struct Stream *s = &ds->dma->streams[1];
 425     size_t ret;
 426
 427     ret = stream_process_s2mem(s, buf, len);
 428     stream_update_irq(s);
 429     return ret;
 430 }
 431
 432 static uint64_t axidma_read(void *opaque, hwaddr addr,
 433                             unsigned size)
 434 {
 435     XilinxAXIDMA *d = opaque;
 436     struct Stream *s;
 437     uint32_t r = 0;
 438     int sid;
 439
 440     sid = streamid_from_addr(addr);
 441     s = &d->streams[sid];
 442
 443     addr = addr % 0x30;
 444     addr >>= 2;
 445     switch (addr) {
 446         case R_DMACR:
 447             /* Simulate one cycles reset delay.  */
 448             s->regs[addr] &= ~DMACR_RESET;
 449             r = s->regs[addr];
 450             break;
 451         case R_DMASR:
 452             s->regs[addr] &= 0xffff;
 453             s->regs[addr] |= (s->complete_cnt & 0xff) << 16;
 454             s->regs[addr] |= (ptimer_get_count(s->ptimer) & 0xff) << 24;
 455             r = s->regs[addr];
 456             break;
 457         default:
 458             r = s->regs[addr];
 459             D(qemu_log("%s ch=%d addr=" TARGET_FMT_plx " v=%x\n",
 460                            __func__, sid, addr * 4, r));
 461             break;
 462     }
 463     return r;
 464
 465 }
 466
 467 static void axidma_write(void *opaque, hwaddr addr,
 468                          uint64_t value, unsigned size)
 469 {
 470     XilinxAXIDMA *d = opaque;
 471     struct Stream *s;
 472     int sid;
 473
 474     sid = streamid_from_addr(addr);
 475     s = &d->streams[sid];
 476
 477     addr = addr % 0x30;
 478     addr >>= 2;
 479     switch (addr) {
 480         case R_DMACR:
 481             /* Tailptr mode is always on.  */
 482             value |= DMACR_TAILPTR_MODE;
 483             /* Remember our previous reset state.  */
 484             value |= (s->regs[addr] & DMACR_RESET);
 485             s->regs[addr] = value;
 486
 487             if (value & DMACR_RESET) {
 488                 stream_reset(s);
 489             }
 490
 491             if ((value & 1) && !stream_resetting(s)) {
 492                 /* Start processing.  */
 493                 s->regs[R_DMASR] &= ~(DMASR_HALTED | DMASR_IDLE);
 494             }
 495             stream_reload_complete_cnt(s);
 496             break;
 497
 498         case R_DMASR:
 499             /* Mask away write to clear irq lines.  */
 500             value &= ~(value & DMASR_IRQ_MASK);
 501             s->regs[addr] = value;
 502             break;
 503
 504         case R_TAILDESC:
 505             s->regs[addr] = value;
 506             s->regs[R_DMASR] &= ~DMASR_IDLE; /* Not idle.  */
 507             if (!sid) {
 508                 stream_process_mem2s(s, d->tx_data_dev, d->tx_control_dev);
 509             }
 510             break;
 511         default:
 512             D(qemu_log("%s: ch=%d addr=" TARGET_FMT_plx " v=%x\n",
 513                   __func__, sid, addr * 4, (unsigned)value));
 514             s->regs[addr] = value;
 515             break;
 516     }
 517     if (sid == 1 && d->notify) {
 518         StreamCanPushNotifyFn notifytmp = d->notify;
 519         d->notify = NULL;
 520         notifytmp(d->notify_opaque);
 521     }
 522     stream_update_irq(s);
 523 }
 524
 525 static const MemoryRegionOps axidma_ops = {
 526     .read = axidma_read,
 527     .write = axidma_write,
 528     .endianness = DEVICE_NATIVE_ENDIAN,
 529 };
 530
 531 static void xilinx_axidma_realize(DeviceState *dev, Error **errp)
 532 {
 533     XilinxAXIDMA *s = XILINX_AXI_DMA(dev);
 534     XilinxAXIDMAStreamSlave *ds = XILINX_AXI_DMA_DATA_STREAM(&s->rx_data_dev);
 535     XilinxAXIDMAStreamSlave *cs = XILINX_AXI_DMA_CONTROL_STREAM(
 536                                                             &s->rx_control_dev);
 537     Error *local_errp = NULL;
 538
 539     object_property_add_link(OBJECT(ds), "dma", TYPE_XILINX_AXI_DMA,
 540                              (Object **)&ds->dma, &local_errp);
 541     object_property_add_link(OBJECT(cs), "dma", TYPE_XILINX_AXI_DMA,
 542                              (Object **)&cs->dma, &local_errp);
 543     if (local_errp) {
 544         goto xilinx_axidma_realize_fail;
 545     }
 546     object_property_set_link(OBJECT(ds), OBJECT(s), "dma", &local_errp);
 547     object_property_set_link(OBJECT(cs), OBJECT(s), "dma", &local_errp);
 548     if (local_errp) {
 549         goto xilinx_axidma_realize_fail;
 550     }
 551
 552     int i;
 553
 554     for (i = 0; i < 2; i++) {
 555         s->streams[i].nr = i;
 556         s->streams[i].bh = qemu_bh_new(timer_hit, &s->streams[i]);
 557         s->streams[i].ptimer = ptimer_init(s->streams[i].bh);
 558         ptimer_set_freq(s->streams[i].ptimer, s->freqhz);
 559     }
 560     return;
 561
 562 xilinx_axidma_realize_fail:
 563     if (!*errp) {
 564         *errp = local_errp;
 565     }
 566 }
 567
 568 static void xilinx_axidma_init(Object *obj)
 569 {
 570     XilinxAXIDMA *s = XILINX_AXI_DMA(obj);
 571     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 572     Error *errp = NULL;
 573
 574     object_property_add_link(obj, "axistream-connected", TYPE_STREAM_SLAVE,
 575                              (Object **) &s->tx_data_dev, &errp);
 576     assert_no_error(errp);
 577     object_property_add_link(obj, "axistream-control-connected",
 578                              TYPE_STREAM_SLAVE,
 579                              (Object **) &s->tx_control_dev, &errp);
 580     assert_no_error(errp);
 581
 582     object_initialize(&s->rx_data_dev, TYPE_XILINX_AXI_DMA_DATA_STREAM);
 583     object_initialize(&s->rx_control_dev, TYPE_XILINX_AXI_DMA_CONTROL_STREAM);
 584     object_property_add_child(OBJECT(s), "axistream-connected-target",
 585                               (Object *)&s->rx_data_dev, &errp);
 586     assert_no_error(errp);
 587     object_property_add_child(OBJECT(s), "axistream-control-connected-target",
 588                               (Object *)&s->rx_control_dev, &errp);
 589     assert_no_error(errp);
 590
 591     sysbus_init_irq(sbd, &s->streams[0].irq);
 592     sysbus_init_irq(sbd, &s->streams[1].irq);
 593
 594     memory_region_init_io(&s->iomem, obj, &axidma_ops, s,
 595                           "xlnx.axi-dma", R_MAX * 4 * 2);
 596     sysbus_init_mmio(sbd, &s->iomem);
 597 }
 598
 599 static Property axidma_properties[] = {
 600     DEFINE_PROP_UINT32("freqhz", XilinxAXIDMA, freqhz, 50000000),
 601     DEFINE_PROP_END_OF_LIST(),
 602 };
 603
 604 static void axidma_class_init(ObjectClass *klass, void *data)
 605 {
 606     DeviceClass *dc = DEVICE_CLASS(klass);
 607
 608     dc->realize = xilinx_axidma_realize,
 609     dc->reset = xilinx_axidma_reset;
 610     dc->props = axidma_properties;
 611 }
 612
 613 static StreamSlaveClass xilinx_axidma_data_stream_class = {
 614     .push = xilinx_axidma_data_stream_push,
 615     .can_push = xilinx_axidma_data_stream_can_push,
 616 };
 617
 618 static StreamSlaveClass xilinx_axidma_control_stream_class = {
 619     .push = xilinx_axidma_control_stream_push,
 620 };
 621
 622 static void xilinx_axidma_stream_class_init(ObjectClass *klass, void *data)
 623 {
 624     StreamSlaveClass *ssc = STREAM_SLAVE_CLASS(klass);
 625
 626     ssc->push = ((StreamSlaveClass *)data)->push;
 627     ssc->can_push = ((StreamSlaveClass *)data)->can_push;
 628 }
 629
 630 static const TypeInfo axidma_info = {
 631     .name          = TYPE_XILINX_AXI_DMA,
 632     .parent        = TYPE_SYS_BUS_DEVICE,
 633     .instance_size = sizeof(XilinxAXIDMA),
 634     .class_init    = axidma_class_init,
 635     .instance_init = xilinx_axidma_init,
 636 };
 637
 638 static const TypeInfo xilinx_axidma_data_stream_info = {
 639     .name          = TYPE_XILINX_AXI_DMA_DATA_STREAM,
 640     .parent        = TYPE_OBJECT,
 641     .instance_size = sizeof(struct XilinxAXIDMAStreamSlave),
 642     .class_init    = xilinx_axidma_stream_class_init,
 643     .class_data    = &xilinx_axidma_data_stream_class,
 644     .interfaces = (InterfaceInfo[]) {
 645         { TYPE_STREAM_SLAVE },
 646         { }
 647     }
 648 };
 649
 650 static const TypeInfo xilinx_axidma_control_stream_info = {
 651     .name          = TYPE_XILINX_AXI_DMA_CONTROL_STREAM,
 652     .parent        = TYPE_OBJECT,
 653     .instance_size = sizeof(struct XilinxAXIDMAStreamSlave),
 654     .class_init    = xilinx_axidma_stream_class_init,
 655     .class_data    = &xilinx_axidma_control_stream_class,
 656     .interfaces = (InterfaceInfo[]) {
 657         { TYPE_STREAM_SLAVE },
 658         { }
 659     }
 660 };
 661
 662 static void xilinx_axidma_register_types(void)
 663 {
 664     type_register_static(&axidma_info);
 665     type_register_static(&xilinx_axidma_data_stream_info);
 666     type_register_static(&xilinx_axidma_control_stream_info);
 667 }
 668
 669 type_init(xilinx_axidma_register_types)