hw/net/can/ctucan_core.c

   1 /*
   2  * CTU CAN FD PCI device emulation
   3  * http://canbus.pages.fel.cvut.cz/
   4  *
   5  * Copyright (c) 2019 Jan Charvat (jancharvat.charvat@gmail.com)
   6  *
   7  * Based on Kvaser PCI CAN device (SJA1000 based) emulation implemented by
   8  * Jin Yang and Pavel Pisa
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  23  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26  * THE SOFTWARE.
  27  */
  28
  29 #include "qemu/osdep.h"
  30 #include "qemu/log.h"
  31 #include "chardev/char.h"
  32 #include "hw/irq.h"
  33 #include "migration/vmstate.h"
  34 #include "net/can_emu.h"
  35
  36 #include "ctucan_core.h"
  37
  38 #ifndef DEBUG_CAN
  39 #define DEBUG_CAN 0
  40 #endif /*DEBUG_CAN*/
  41
  42 #define DPRINTF(fmt, ...) \
  43     do { \
  44         if (DEBUG_CAN) { \
  45             qemu_log("[ctucan]: " fmt , ## __VA_ARGS__); \
  46         } \
  47     } while (0)
  48
  49 static void ctucan_buff2frame(const uint8_t *buff, qemu_can_frame *frame)
  50 {
  51     frame->can_id = 0;
  52     frame->can_dlc = 0;
  53     frame->flags = 0;
  54
  55     if (buff == NULL) {
  56         return;
  57     }
  58     {
  59         union ctu_can_fd_frame_form_w frame_form_w;
  60         union ctu_can_fd_identifier_w identifier_w;
  61         unsigned int ide;
  62         uint32_t w;
  63
  64         w = le32_to_cpu(*(uint32_t *)buff);
  65         frame_form_w = (union ctu_can_fd_frame_form_w)w;
  66         frame->can_dlc = can_dlc2len(frame_form_w.s.dlc);
  67
  68         w = le32_to_cpu(*(uint32_t *)(buff + 4));
  69         identifier_w = (union ctu_can_fd_identifier_w)w;
  70
  71         ide = frame_form_w.s.ide;
  72         if (ide) {
  73             frame->can_id = (identifier_w.s.identifier_base << 18) |
  74                             identifier_w.s.identifier_ext;
  75             frame->can_id |= QEMU_CAN_EFF_FLAG;
  76         } else {
  77             frame->can_id = identifier_w.s.identifier_base;
  78         }
  79
  80         if (frame_form_w.s.esi_rsv) {
  81             frame->flags |= QEMU_CAN_FRMF_ESI;
  82         }
  83
  84         if (frame_form_w.s.rtr) {
  85             frame->can_id |= QEMU_CAN_RTR_FLAG;
  86         }
  87
  88         if (frame_form_w.s.fdf) {   /*CAN FD*/
  89             frame->flags |= QEMU_CAN_FRMF_TYPE_FD;
  90             if (frame_form_w.s.brs) {
  91                 frame->flags |= QEMU_CAN_FRMF_BRS;
  92             }
  93         }
  94     }
  95
  96     memcpy(frame->data, buff + 0x10, 0x40);
  97 }
  98
  99
 100 static int ctucan_frame2buff(const qemu_can_frame *frame, uint8_t *buff)
 101 {
 102     unsigned int bytes_cnt = -1;
 103     memset(buff, 0, CTUCAN_MSG_MAX_LEN * sizeof(*buff));
 104
 105     if (frame == NULL) {
 106         return bytes_cnt;
 107     }
 108     {
 109         union ctu_can_fd_frame_form_w frame_form_w;
 110         union ctu_can_fd_identifier_w identifier_w;
 111
 112         frame_form_w.u32 = 0;
 113         identifier_w.u32 = 0;
 114
 115         bytes_cnt = frame->can_dlc;
 116         bytes_cnt = (bytes_cnt + 3) & ~3;
 117         bytes_cnt += 16;
 118         frame_form_w.s.rwcnt = (bytes_cnt >> 2) - 1;
 119
 120         frame_form_w.s.dlc = can_len2dlc(frame->can_dlc);
 121
 122         if (frame->can_id & QEMU_CAN_EFF_FLAG) {
 123             frame_form_w.s.ide = 1;
 124             identifier_w.s.identifier_base =
 125                                     (frame->can_id & 0x1FFC0000) >> 18;
 126             identifier_w.s.identifier_ext = frame->can_id & 0x3FFFF;
 127         } else {
 128             identifier_w.s.identifier_base = frame->can_id & 0x7FF;
 129         }
 130
 131         if (frame->flags & QEMU_CAN_FRMF_ESI) {
 132             frame_form_w.s.esi_rsv = 1;
 133         }
 134
 135         if (frame->can_id & QEMU_CAN_RTR_FLAG) {
 136             frame_form_w.s.rtr = 1;
 137         }
 138
 139         if (frame->flags & QEMU_CAN_FRMF_TYPE_FD) {  /*CAN FD*/
 140            frame_form_w.s.fdf = 1;
 141             if (frame->flags & QEMU_CAN_FRMF_BRS) {
 142                 frame_form_w.s.brs = 1;
 143             }
 144         }
 145         *(uint32_t *)buff = cpu_to_le32(frame_form_w.u32);
 146         *(uint32_t *)(buff + 4) = cpu_to_le32(identifier_w.u32);
 147     }
 148
 149     memcpy(buff + 0x10, frame->data, 0x40);
 150
 151     return bytes_cnt;
 152 }
 153
 154 static void ctucan_update_irq(CtuCanCoreState *s)
 155 {
 156     union ctu_can_fd_int_stat int_rq;
 157
 158     int_rq.u32 = 0;
 159
 160     if (s->rx_status_rx_settings.s.rxfrc) {
 161         int_rq.s.rbnei = 1;
 162     }
 163
 164     int_rq.u32 &= ~s->int_mask.u32;
 165     s->int_stat.u32 |= int_rq.u32;
 166     if (s->int_stat.u32 & s->int_ena.u32) {
 167         qemu_irq_raise(s->irq);
 168     } else {
 169         qemu_irq_lower(s->irq);
 170     }
 171 }
 172
 173 static void ctucan_update_txnf(CtuCanCoreState *s)
 174 {
 175     int i;
 176     int txnf;
 177     unsigned int buff_st;
 178
 179     txnf = 0;
 180
 181     for (i = 0; i < CTUCAN_CORE_TXBUF_NUM; i++) {
 182         buff_st = (s->tx_status.u32 >> (i * 4)) & 0xf;
 183         if (buff_st == TXT_ETY) {
 184             txnf = 1;
 185         }
 186     }
 187     s->status.s.txnf = txnf;
 188 }
 189
 190 void ctucan_hardware_reset(CtuCanCoreState *s)
 191 {
 192     DPRINTF("Hardware reset in progress!!!\n");
 193     int i;
 194     unsigned int buff_st;
 195     uint32_t buff_st_mask;
 196
 197     s->tx_status.u32 = 0;
 198     for (i = 0; i < CTUCAN_CORE_TXBUF_NUM; i++) {
 199         buff_st_mask = 0xf << (i * 4);
 200         buff_st = TXT_ETY;
 201         s->tx_status.u32 = (s->tx_status.u32 & ~buff_st_mask) |
 202             (buff_st << (i * 4));
 203     }
 204     s->status.s.idle = 1;
 205
 206     ctucan_update_txnf(s);
 207
 208     s->rx_status_rx_settings.u32 = 0;
 209     s->rx_tail_pos = 0;
 210     s->rx_cnt = 0;
 211     s->rx_frame_rem = 0;
 212
 213     /* Flush RX buffer */
 214     s->rx_tail_pos = 0;
 215     s->rx_cnt = 0;
 216     s->rx_frame_rem = 0;
 217
 218     /* Set on progdokum reset value */
 219     s->mode_settings.u32 = 0;
 220     s->mode_settings.s.fde = 1;
 221
 222     s->int_stat.u32 = 0;
 223     s->int_ena.u32 = 0;
 224     s->int_mask.u32 = 0;
 225
 226     s->rx_status_rx_settings.u32 = 0;
 227     s->rx_status_rx_settings.s.rxe = 0;
 228
 229     s->rx_fr_ctr.u32 = 0;
 230     s->tx_fr_ctr.u32 = 0;
 231
 232     s->yolo_reg.s.yolo_val = 3735928559;
 233
 234     qemu_irq_lower(s->irq);
 235 }
 236
 237 static void ctucan_send_ready_buffers(CtuCanCoreState *s)
 238 {
 239     qemu_can_frame frame;
 240     uint8_t *pf;
 241     int buff2tx_idx;
 242     uint32_t tx_prio_max;
 243
 244     if (!s->mode_settings.s.ena) {
 245         return;
 246     }
 247
 248     do {
 249         union ctu_can_fd_int_stat int_stat;
 250         int i;
 251         buff2tx_idx = -1;
 252         tx_prio_max = 0;
 253
 254         for (i = 0; i < CTUCAN_CORE_TXBUF_NUM; i++) {
 255             uint32_t prio;
 256
 257             if (extract32(s->tx_status.u32, i * 4, 4) != TXT_RDY) {
 258                 continue;
 259             }
 260             prio = (s->tx_priority.u32 >> (i * 4)) & 0x7;
 261             if (tx_prio_max < prio) {
 262                 tx_prio_max = prio;
 263                 buff2tx_idx = i;
 264             }
 265         }
 266         if (buff2tx_idx == -1) {
 267             break;
 268         }
 269         int_stat.u32 = 0;
 270         pf = s->tx_buffer[buff2tx_idx].data;
 271         ctucan_buff2frame(pf, &frame);
 272         s->status.s.idle = 0;
 273         s->status.s.txs = 1;
 274         can_bus_client_send(&s->bus_client, &frame, 1);
 275         s->status.s.idle = 1;
 276         s->status.s.txs = 0;
 277         s->tx_fr_ctr.s.tx_fr_ctr_val++;
 278         int_stat.s.txi = 1;
 279         int_stat.s.txbhci = 1;
 280         s->int_stat.u32 |= int_stat.u32 & ~s->int_mask.u32;
 281         s->tx_status.u32 = deposit32(s->tx_status.u32,
 282                                      buff2tx_idx * 4, 4, TXT_TOK);
 283     } while (1);
 284 }
 285
 286 #define CTUCAN_CORE_TXBUFF_SPAN \
 287             (CTU_CAN_FD_TXTB2_DATA_1 - CTU_CAN_FD_TXTB1_DATA_1)
 288
 289 void ctucan_mem_write(CtuCanCoreState *s, hwaddr addr, uint64_t val,
 290                        unsigned size)
 291 {
 292     int              i;
 293
 294     DPRINTF("write 0x%02llx addr 0x%02x\n",
 295             (unsigned long long)val, (unsigned int)addr);
 296
 297     if (addr >= CTUCAN_CORE_MEM_SIZE) {
 298         return;
 299     }
 300
 301     if (addr >= CTU_CAN_FD_TXTB1_DATA_1) {
 302         int buff_num;
 303         addr -= CTU_CAN_FD_TXTB1_DATA_1;
 304         buff_num = addr / CTUCAN_CORE_TXBUFF_SPAN;
 305         addr %= CTUCAN_CORE_TXBUFF_SPAN;
 306         if ((buff_num < CTUCAN_CORE_TXBUF_NUM) &&
 307             ((addr + size) <= sizeof(s->tx_buffer[buff_num].data))) {
 308             stn_le_p(s->tx_buffer[buff_num].data + addr, size, val);
 309         }
 310     } else {
 311         switch (addr & ~3) {
 312         case CTU_CAN_FD_MODE:
 313             s->mode_settings.u32 = (uint32_t)val;
 314             if (s->mode_settings.s.rst) {
 315                 ctucan_hardware_reset(s);
 316                 s->mode_settings.s.rst = 0;
 317             }
 318             break;
 319         case CTU_CAN_FD_COMMAND:
 320         {
 321             union ctu_can_fd_command command;
 322             command.u32 = (uint32_t)val;
 323             if (command.s.cdo) {
 324                 s->status.s.dor = 0;
 325             }
 326             if (command.s.rrb) {
 327                 s->rx_tail_pos = 0;
 328                 s->rx_cnt = 0;
 329                 s->rx_frame_rem = 0;
 330                 s->rx_status_rx_settings.s.rxfrc = 0;
 331             }
 332             if (command.s.txfcrst) {
 333                 s->tx_fr_ctr.s.tx_fr_ctr_val = 0;
 334             }
 335             if (command.s.rxfcrst) {
 336                 s->rx_fr_ctr.s.rx_fr_ctr_val = 0;
 337             }
 338             break;
 339         }
 340         case CTU_CAN_FD_INT_STAT:
 341             s->int_stat.u32 &= ~(uint32_t)val;
 342             break;
 343         case CTU_CAN_FD_INT_ENA_SET:
 344             s->int_ena.u32 |= (uint32_t)val;
 345             break;
 346         case CTU_CAN_FD_INT_ENA_CLR:
 347             s->int_ena.u32 &= ~(uint32_t)val;
 348             break;
 349         case CTU_CAN_FD_INT_MASK_SET:
 350             s->int_mask.u32 |= (uint32_t)val;
 351             break;
 352         case CTU_CAN_FD_INT_MASK_CLR:
 353             s->int_mask.u32 &= ~(uint32_t)val;
 354             break;
 355         case CTU_CAN_FD_TX_COMMAND:
 356             if (s->mode_settings.s.ena) {
 357                 union ctu_can_fd_tx_command tx_command;
 358                 union ctu_can_fd_tx_command mask;
 359                 unsigned int buff_st;
 360                 uint32_t buff_st_mask;
 361
 362                 tx_command.u32 = (uint32_t)val;
 363                 mask.u32 = 0;
 364                 mask.s.txb1 = 1;
 365
 366                 for (i = 0; i < CTUCAN_CORE_TXBUF_NUM; i++) {
 367                     if (!(tx_command.u32 & (mask.u32 << i))) {
 368                         continue;
 369                     }
 370                     buff_st_mask = 0xf << (i * 4);
 371                     buff_st = (s->tx_status.u32 >> (i * 4)) & 0xf;
 372                     if (tx_command.s.txca) {
 373                         if (buff_st == TXT_RDY) {
 374                             buff_st = TXT_ABT;
 375                         }
 376                     }
 377                     if (tx_command.s.txcr) {
 378                         if ((buff_st == TXT_TOK) || (buff_st == TXT_ERR) ||
 379                             (buff_st == TXT_ABT) || (buff_st == TXT_ETY))
 380                             buff_st = TXT_RDY;
 381                     }
 382                     if (tx_command.s.txce) {
 383                         if ((buff_st == TXT_TOK) || (buff_st == TXT_ERR) ||
 384                             (buff_st == TXT_ABT))
 385                             buff_st = TXT_ETY;
 386                     }
 387                     s->tx_status.u32 = (s->tx_status.u32 & ~buff_st_mask) |
 388                                         (buff_st << (i * 4));
 389                 }
 390
 391                 ctucan_send_ready_buffers(s);
 392                 ctucan_update_txnf(s);
 393             }
 394             break;
 395         case CTU_CAN_FD_TX_PRIORITY:
 396             s->tx_priority.u32 = (uint32_t)val;
 397             break;
 398         }
 399
 400         ctucan_update_irq(s);
 401     }
 402
 403     return;
 404 }
 405
 406 uint64_t ctucan_mem_read(CtuCanCoreState *s, hwaddr addr, unsigned size)
 407 {
 408     uint32_t val = 0;
 409
 410     DPRINTF("read addr 0x%02x ...\n", (unsigned int)addr);
 411
 412     if (addr > CTUCAN_CORE_MEM_SIZE) {
 413         return 0;
 414     }
 415
 416     switch (addr & ~3) {
 417     case CTU_CAN_FD_DEVICE_ID:
 418         {
 419             union ctu_can_fd_device_id_version idver;
 420             idver.u32 = 0;
 421             idver.s.device_id = CTU_CAN_FD_ID;
 422             idver.s.ver_major = 2;
 423             idver.s.ver_minor = 2;
 424             val = idver.u32;
 425         }
 426         break;
 427     case CTU_CAN_FD_MODE:
 428         val = s->mode_settings.u32;
 429         break;
 430     case CTU_CAN_FD_STATUS:
 431         val = s->status.u32;
 432         break;
 433     case CTU_CAN_FD_INT_STAT:
 434         val = s->int_stat.u32;
 435         break;
 436     case CTU_CAN_FD_INT_ENA_SET:
 437     case CTU_CAN_FD_INT_ENA_CLR:
 438         val = s->int_ena.u32;
 439         break;
 440     case CTU_CAN_FD_INT_MASK_SET:
 441     case CTU_CAN_FD_INT_MASK_CLR:
 442         val = s->int_mask.u32;
 443         break;
 444     case CTU_CAN_FD_RX_MEM_INFO:
 445         s->rx_mem_info.u32 = 0;
 446         s->rx_mem_info.s.rx_buff_size = CTUCAN_RCV_BUF_LEN >> 2;
 447         s->rx_mem_info.s.rx_mem_free = (CTUCAN_RCV_BUF_LEN -
 448                                         s->rx_cnt) >> 2;
 449         val = s->rx_mem_info.u32;
 450         break;
 451     case CTU_CAN_FD_RX_POINTERS:
 452     {
 453         uint32_t rx_head_pos = s->rx_tail_pos + s->rx_cnt;
 454         rx_head_pos %= CTUCAN_RCV_BUF_LEN;
 455         s->rx_pointers.s.rx_wpp = rx_head_pos;
 456         s->rx_pointers.s.rx_rpp = s->rx_tail_pos;
 457         val = s->rx_pointers.u32;
 458         break;
 459     }
 460     case CTU_CAN_FD_RX_STATUS:
 461     case CTU_CAN_FD_RX_SETTINGS:
 462         if (!s->rx_status_rx_settings.s.rxfrc) {
 463             s->rx_status_rx_settings.s.rxe = 1;
 464         } else {
 465             s->rx_status_rx_settings.s.rxe = 0;
 466         }
 467         if (((s->rx_cnt + 3) & ~3) == CTUCAN_RCV_BUF_LEN) {
 468             s->rx_status_rx_settings.s.rxf = 1;
 469         } else {
 470             s->rx_status_rx_settings.s.rxf = 0;
 471         }
 472         val = s->rx_status_rx_settings.u32;
 473         break;
 474     case CTU_CAN_FD_RX_DATA:
 475         if (s->rx_cnt) {
 476             memcpy(&val, s->rx_buff + s->rx_tail_pos, 4);
 477             val = le32_to_cpu(val);
 478             if (!s->rx_frame_rem) {
 479                 union ctu_can_fd_frame_form_w frame_form_w;
 480                 frame_form_w.u32 = val;
 481                 s->rx_frame_rem = frame_form_w.s.rwcnt * 4 + 4;
 482             }
 483             s->rx_cnt -= 4;
 484             s->rx_frame_rem -= 4;
 485             if (!s->rx_frame_rem) {
 486                 s->rx_status_rx_settings.s.rxfrc--;
 487                 if (!s->rx_status_rx_settings.s.rxfrc) {
 488                     s->status.s.rxne = 0;
 489                     s->status.s.idle = 1;
 490                     s->status.s.rxs = 0;
 491                 }
 492             }
 493             s->rx_tail_pos = (s->rx_tail_pos + 4) % CTUCAN_RCV_BUF_LEN;
 494         } else {
 495             val = 0;
 496         }
 497         break;
 498     case CTU_CAN_FD_TX_STATUS:
 499         val = s->tx_status.u32;
 500         break;
 501     case CTU_CAN_FD_TX_PRIORITY:
 502         val = s->tx_priority.u32;
 503         break;
 504     case CTU_CAN_FD_RX_FR_CTR:
 505         val = s->rx_fr_ctr.s.rx_fr_ctr_val;
 506         break;
 507     case CTU_CAN_FD_TX_FR_CTR:
 508         val = s->tx_fr_ctr.s.tx_fr_ctr_val;
 509         break;
 510     case CTU_CAN_FD_YOLO_REG:
 511         val = s->yolo_reg.s.yolo_val;
 512         break;
 513     }
 514
 515     val >>= ((addr & 3) << 3);
 516     if (size < 8) {
 517         val &= ((uint64_t)1 << (size << 3)) - 1;
 518     }
 519
 520     return val;
 521 }
 522
 523 bool ctucan_can_receive(CanBusClientState *client)
 524 {
 525     CtuCanCoreState *s = container_of(client, CtuCanCoreState, bus_client);
 526
 527     if (!s->mode_settings.s.ena) {
 528         return false;
 529     }
 530
 531     return true; /* always return true, when operation mode */
 532 }
 533
 534 ssize_t ctucan_receive(CanBusClientState *client, const qemu_can_frame *frames,
 535                         size_t frames_cnt)
 536 {
 537     CtuCanCoreState *s = container_of(client, CtuCanCoreState, bus_client);
 538     static uint8_t rcv[CTUCAN_MSG_MAX_LEN];
 539     int i;
 540     int ret = -1;
 541     const qemu_can_frame *frame = frames;
 542     union ctu_can_fd_int_stat int_stat;
 543     int_stat.u32 = 0;
 544
 545     if (frames_cnt <= 0) {
 546         return 0;
 547     }
 548
 549     ret = ctucan_frame2buff(frame, rcv);
 550
 551     if (s->rx_cnt + ret > CTUCAN_RCV_BUF_LEN) { /* Data overrun. */
 552         s->status.s.dor = 1;
 553         int_stat.s.doi = 1;
 554         s->int_stat.u32 |= int_stat.u32 & ~s->int_mask.u32;
 555         ctucan_update_irq(s);
 556         DPRINTF("Receive FIFO overrun\n");
 557         return ret;
 558     }
 559     s->status.s.idle = 0;
 560     s->status.s.rxs = 1;
 561     int_stat.s.rxi = 1;
 562     if (((s->rx_cnt + 3) & ~3) == CTUCAN_RCV_BUF_LEN) {
 563         int_stat.s.rxfi = 1;
 564     }
 565     s->int_stat.u32 |= int_stat.u32 & ~s->int_mask.u32;
 566     s->rx_fr_ctr.s.rx_fr_ctr_val++;
 567     s->rx_status_rx_settings.s.rxfrc++;
 568     for (i = 0; i < ret; i++) {
 569         s->rx_buff[(s->rx_tail_pos + s->rx_cnt) % CTUCAN_RCV_BUF_LEN] = rcv[i];
 570         s->rx_cnt++;
 571     }
 572     s->status.s.rxne = 1;
 573
 574     ctucan_update_irq(s);
 575
 576     return 1;
 577 }
 578
 579 static CanBusClientInfo ctucan_bus_client_info = {
 580     .can_receive = ctucan_can_receive,
 581     .receive = ctucan_receive,
 582 };
 583
 584
 585 int ctucan_connect_to_bus(CtuCanCoreState *s, CanBusState *bus)
 586 {
 587     s->bus_client.info = &ctucan_bus_client_info;
 588
 589     if (!bus) {
 590         return -EINVAL;
 591     }
 592
 593     if (can_bus_insert_client(bus, &s->bus_client) < 0) {
 594         return -1;
 595     }
 596
 597     return 0;
 598 }
 599
 600 void ctucan_disconnect(CtuCanCoreState *s)
 601 {
 602     can_bus_remove_client(&s->bus_client);
 603 }
 604
 605 int ctucan_init(CtuCanCoreState *s, qemu_irq irq)
 606 {
 607     s->irq = irq;
 608
 609     qemu_irq_lower(s->irq);
 610
 611     ctucan_hardware_reset(s);
 612
 613     return 0;
 614 }
 615
 616 const VMStateDescription vmstate_qemu_ctucan_tx_buffer = {
 617     .name = "qemu_ctucan_tx_buffer",
 618     .version_id = 1,
 619     .minimum_version_id = 1,
 620     .minimum_version_id_old = 1,
 621     .fields = (VMStateField[]) {
 622         VMSTATE_UINT8_ARRAY(data, CtuCanCoreMsgBuffer, CTUCAN_CORE_MSG_MAX_LEN),
 623         VMSTATE_END_OF_LIST()
 624     }
 625 };
 626
 627 static int ctucan_post_load(void *opaque, int version_id)
 628 {
 629     CtuCanCoreState *s = opaque;
 630     ctucan_update_irq(s);
 631     return 0;
 632 }
 633
 634 /* VMState is needed for live migration of QEMU images */
 635 const VMStateDescription vmstate_ctucan = {
 636     .name = "ctucan",
 637     .version_id = 1,
 638     .minimum_version_id = 1,
 639     .minimum_version_id_old = 1,
 640     .post_load = ctucan_post_load,
 641     .fields = (VMStateField[]) {
 642         VMSTATE_UINT32(mode_settings.u32, CtuCanCoreState),
 643         VMSTATE_UINT32(status.u32, CtuCanCoreState),
 644         VMSTATE_UINT32(int_stat.u32, CtuCanCoreState),
 645         VMSTATE_UINT32(int_ena.u32, CtuCanCoreState),
 646         VMSTATE_UINT32(int_mask.u32, CtuCanCoreState),
 647         VMSTATE_UINT32(brt.u32, CtuCanCoreState),
 648         VMSTATE_UINT32(brt_fd.u32, CtuCanCoreState),
 649         VMSTATE_UINT32(ewl_erp_fault_state.u32, CtuCanCoreState),
 650         VMSTATE_UINT32(rec_tec.u32, CtuCanCoreState),
 651         VMSTATE_UINT32(err_norm_err_fd.u32, CtuCanCoreState),
 652         VMSTATE_UINT32(ctr_pres.u32, CtuCanCoreState),
 653         VMSTATE_UINT32(filter_a_mask.u32, CtuCanCoreState),
 654         VMSTATE_UINT32(filter_a_val.u32, CtuCanCoreState),
 655         VMSTATE_UINT32(filter_b_mask.u32, CtuCanCoreState),
 656         VMSTATE_UINT32(filter_b_val.u32, CtuCanCoreState),
 657         VMSTATE_UINT32(filter_c_mask.u32, CtuCanCoreState),
 658         VMSTATE_UINT32(filter_c_val.u32, CtuCanCoreState),
 659         VMSTATE_UINT32(filter_ran_low.u32, CtuCanCoreState),
 660         VMSTATE_UINT32(filter_ran_high.u32, CtuCanCoreState),
 661         VMSTATE_UINT32(filter_control_filter_status.u32, CtuCanCoreState),
 662         VMSTATE_UINT32(rx_mem_info.u32, CtuCanCoreState),
 663         VMSTATE_UINT32(rx_pointers.u32, CtuCanCoreState),
 664         VMSTATE_UINT32(rx_status_rx_settings.u32, CtuCanCoreState),
 665         VMSTATE_UINT32(tx_status.u32, CtuCanCoreState),
 666         VMSTATE_UINT32(tx_priority.u32, CtuCanCoreState),
 667         VMSTATE_UINT32(err_capt_alc.u32, CtuCanCoreState),
 668         VMSTATE_UINT32(trv_delay_ssp_cfg.u32, CtuCanCoreState),
 669         VMSTATE_UINT32(rx_fr_ctr.u32, CtuCanCoreState),
 670         VMSTATE_UINT32(tx_fr_ctr.u32, CtuCanCoreState),
 671         VMSTATE_UINT32(debug_register.u32, CtuCanCoreState),
 672         VMSTATE_UINT32(yolo_reg.u32, CtuCanCoreState),
 673         VMSTATE_UINT32(timestamp_low.u32, CtuCanCoreState),
 674         VMSTATE_UINT32(timestamp_high.u32, CtuCanCoreState),
 675
 676         VMSTATE_STRUCT_ARRAY(tx_buffer, CtuCanCoreState,
 677                 CTUCAN_CORE_TXBUF_NUM, 0, vmstate_qemu_ctucan_tx_buffer,
 678                 CtuCanCoreMsgBuffer),
 679
 680         VMSTATE_BUFFER(rx_buff, CtuCanCoreState),
 681         VMSTATE_UINT32(rx_tail_pos, CtuCanCoreState),
 682         VMSTATE_UINT32(rx_cnt, CtuCanCoreState),
 683         VMSTATE_UINT32(rx_frame_rem, CtuCanCoreState),
 684
 685         VMSTATE_END_OF_LIST()
 686     }
 687 };