1 /* 2 * QEMU ESP/NCR53C9x emulation 3 * 4 * Copyright (c) 2005-2006 Fabrice Bellard 5 * Copyright (c) 2012 Herve Poussineau 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 #include "qemu/osdep.h" 27 #include "hw/sysbus.h" 28 #include "migration/vmstate.h" 29 #include "hw/irq.h" 30 #include "hw/scsi/esp.h" 31 #include "trace.h" 32 #include "qemu/log.h" 33 #include "qemu/module.h" 34 35 /* 36 * On Sparc32, this is the ESP (NCR53C90) part of chip STP2000 (Master I/O), 37 * also produced as NCR89C100. See 38 * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C100.txt 39 * and 40 * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR53C9X.txt 41 * 42 * On Macintosh Quadra it is a NCR53C96. 43 */ 44 45 static void esp_raise_irq(ESPState *s) 46 { 47 if (!(s->rregs[ESP_RSTAT] & STAT_INT)) { 48 s->rregs[ESP_RSTAT] |= STAT_INT; 49 qemu_irq_raise(s->irq); 50 trace_esp_raise_irq(); 51 } 52 } 53 54 static void esp_lower_irq(ESPState *s) 55 { 56 if (s->rregs[ESP_RSTAT] & STAT_INT) { 57 s->rregs[ESP_RSTAT] &= ~STAT_INT; 58 qemu_irq_lower(s->irq); 59 trace_esp_lower_irq(); 60 } 61 } 62 63 static void esp_raise_drq(ESPState *s) 64 { 65 qemu_irq_raise(s->irq_data); 66 trace_esp_raise_drq(); 67 } 68 69 static void esp_lower_drq(ESPState *s) 70 { 71 qemu_irq_lower(s->irq_data); 72 trace_esp_lower_drq(); 73 } 74 75 void esp_dma_enable(ESPState *s, int irq, int level) 76 { 77 if (level) { 78 s->dma_enabled = 1; 79 trace_esp_dma_enable(); 80 if (s->dma_cb) { 81 s->dma_cb(s); 82 s->dma_cb = NULL; 83 } 84 } else { 85 trace_esp_dma_disable(); 86 s->dma_enabled = 0; 87 } 88 } 89 90 void esp_request_cancelled(SCSIRequest *req) 91 { 92 ESPState *s = req->hba_private; 93 94 if (req == s->current_req) { 95 scsi_req_unref(s->current_req); 96 s->current_req = NULL; 97 s->current_dev = NULL; 98 s->async_len = 0; 99 } 100 } 101 102 static void esp_fifo_push(Fifo8 *fifo, uint8_t val) 103 { 104 if (fifo8_num_used(fifo) == fifo->capacity) { 105 trace_esp_error_fifo_overrun(); 106 return; 107 } 108 109 fifo8_push(fifo, val); 110 } 111 112 static uint8_t esp_fifo_pop(Fifo8 *fifo) 113 { 114 if (fifo8_is_empty(fifo)) { 115 return 0; 116 } 117 118 return fifo8_pop(fifo); 119 } 120 121 static uint32_t esp_fifo_pop_buf(Fifo8 *fifo, uint8_t *dest, int maxlen) 122 { 123 const uint8_t *buf; 124 uint32_t n; 125 126 if (maxlen == 0) { 127 return 0; 128 } 129 130 buf = fifo8_pop_buf(fifo, maxlen, &n); 131 if (dest) { 132 memcpy(dest, buf, n); 133 } 134 135 return n; 136 } 137 138 static uint32_t esp_get_tc(ESPState *s) 139 { 140 uint32_t dmalen; 141 142 dmalen = s->rregs[ESP_TCLO]; 143 dmalen |= s->rregs[ESP_TCMID] << 8; 144 dmalen |= s->rregs[ESP_TCHI] << 16; 145 146 return dmalen; 147 } 148 149 static void esp_set_tc(ESPState *s, uint32_t dmalen) 150 { 151 s->rregs[ESP_TCLO] = dmalen; 152 s->rregs[ESP_TCMID] = dmalen >> 8; 153 s->rregs[ESP_TCHI] = dmalen >> 16; 154 } 155 156 static uint32_t esp_get_stc(ESPState *s) 157 { 158 uint32_t dmalen; 159 160 dmalen = s->wregs[ESP_TCLO]; 161 dmalen |= s->wregs[ESP_TCMID] << 8; 162 dmalen |= s->wregs[ESP_TCHI] << 16; 163 164 return dmalen; 165 } 166 167 static uint8_t esp_pdma_read(ESPState *s) 168 { 169 uint8_t val; 170 171 if (s->do_cmd) { 172 val = esp_fifo_pop(&s->cmdfifo); 173 } else { 174 val = esp_fifo_pop(&s->fifo); 175 } 176 177 return val; 178 } 179 180 static void esp_pdma_write(ESPState *s, uint8_t val) 181 { 182 uint32_t dmalen = esp_get_tc(s); 183 184 if (dmalen == 0) { 185 return; 186 } 187 188 if (s->do_cmd) { 189 esp_fifo_push(&s->cmdfifo, val); 190 } else { 191 esp_fifo_push(&s->fifo, val); 192 } 193 194 dmalen--; 195 esp_set_tc(s, dmalen); 196 } 197 198 static void esp_set_pdma_cb(ESPState *s, enum pdma_cb cb) 199 { 200 s->pdma_cb = cb; 201 } 202 203 static int esp_select(ESPState *s) 204 { 205 int target; 206 207 target = s->wregs[ESP_WBUSID] & BUSID_DID; 208 209 s->ti_size = 0; 210 fifo8_reset(&s->fifo); 211 212 s->current_dev = scsi_device_find(&s->bus, 0, target, 0); 213 if (!s->current_dev) { 214 /* No such drive */ 215 s->rregs[ESP_RSTAT] = 0; 216 s->rregs[ESP_RINTR] = INTR_DC; 217 s->rregs[ESP_RSEQ] = SEQ_0; 218 esp_raise_irq(s); 219 return -1; 220 } 221 222 /* 223 * Note that we deliberately don't raise the IRQ here: this will be done 224 * either in do_command_phase() for DATA OUT transfers or by the deferred 225 * IRQ mechanism in esp_transfer_data() for DATA IN transfers 226 */ 227 s->rregs[ESP_RINTR] |= INTR_FC; 228 s->rregs[ESP_RSEQ] = SEQ_CD; 229 return 0; 230 } 231 232 static uint32_t get_cmd(ESPState *s, uint32_t maxlen) 233 { 234 uint8_t buf[ESP_CMDFIFO_SZ]; 235 uint32_t dmalen, n; 236 int target; 237 238 if (s->current_req) { 239 /* Started a new command before the old one finished. Cancel it. */ 240 scsi_req_cancel(s->current_req); 241 } 242 243 target = s->wregs[ESP_WBUSID] & BUSID_DID; 244 if (s->dma) { 245 dmalen = MIN(esp_get_tc(s), maxlen); 246 if (dmalen == 0) { 247 return 0; 248 } 249 if (s->dma_memory_read) { 250 s->dma_memory_read(s->dma_opaque, buf, dmalen); 251 dmalen = MIN(fifo8_num_free(&s->cmdfifo), dmalen); 252 fifo8_push_all(&s->cmdfifo, buf, dmalen); 253 } else { 254 if (esp_select(s) < 0) { 255 fifo8_reset(&s->cmdfifo); 256 return -1; 257 } 258 esp_raise_drq(s); 259 fifo8_reset(&s->cmdfifo); 260 return 0; 261 } 262 } else { 263 dmalen = MIN(fifo8_num_used(&s->fifo), maxlen); 264 if (dmalen == 0) { 265 return 0; 266 } 267 n = esp_fifo_pop_buf(&s->fifo, buf, dmalen); 268 n = MIN(fifo8_num_free(&s->cmdfifo), n); 269 fifo8_push_all(&s->cmdfifo, buf, n); 270 } 271 trace_esp_get_cmd(dmalen, target); 272 273 if (esp_select(s) < 0) { 274 fifo8_reset(&s->cmdfifo); 275 return -1; 276 } 277 return dmalen; 278 } 279 280 static void do_command_phase(ESPState *s) 281 { 282 uint32_t cmdlen; 283 int32_t datalen; 284 SCSIDevice *current_lun; 285 uint8_t buf[ESP_CMDFIFO_SZ]; 286 287 trace_esp_do_command_phase(s->lun); 288 cmdlen = fifo8_num_used(&s->cmdfifo); 289 if (!cmdlen || !s->current_dev) { 290 return; 291 } 292 esp_fifo_pop_buf(&s->cmdfifo, buf, cmdlen); 293 294 current_lun = scsi_device_find(&s->bus, 0, s->current_dev->id, s->lun); 295 s->current_req = scsi_req_new(current_lun, 0, s->lun, buf, cmdlen, s); 296 datalen = scsi_req_enqueue(s->current_req); 297 s->ti_size = datalen; 298 fifo8_reset(&s->cmdfifo); 299 if (datalen != 0) { 300 s->rregs[ESP_RSTAT] = STAT_TC; 301 s->rregs[ESP_RSEQ] = SEQ_CD; 302 s->ti_cmd = 0; 303 esp_set_tc(s, 0); 304 if (datalen > 0) { 305 /* 306 * Switch to DATA IN phase but wait until initial data xfer is 307 * complete before raising the command completion interrupt 308 */ 309 s->data_in_ready = false; 310 s->rregs[ESP_RSTAT] |= STAT_DI; 311 } else { 312 s->rregs[ESP_RSTAT] |= STAT_DO; 313 s->rregs[ESP_RINTR] |= INTR_BS | INTR_FC; 314 esp_raise_irq(s); 315 esp_lower_drq(s); 316 } 317 scsi_req_continue(s->current_req); 318 return; 319 } 320 } 321 322 static void do_message_phase(ESPState *s) 323 { 324 if (s->cmdfifo_cdb_offset) { 325 uint8_t message = esp_fifo_pop(&s->cmdfifo); 326 327 trace_esp_do_identify(message); 328 s->lun = message & 7; 329 s->cmdfifo_cdb_offset--; 330 } 331 332 /* Ignore extended messages for now */ 333 if (s->cmdfifo_cdb_offset) { 334 int len = MIN(s->cmdfifo_cdb_offset, fifo8_num_used(&s->cmdfifo)); 335 esp_fifo_pop_buf(&s->cmdfifo, NULL, len); 336 s->cmdfifo_cdb_offset = 0; 337 } 338 } 339 340 static void do_cmd(ESPState *s) 341 { 342 do_message_phase(s); 343 assert(s->cmdfifo_cdb_offset == 0); 344 do_command_phase(s); 345 } 346 347 static void satn_pdma_cb(ESPState *s) 348 { 349 if (!esp_get_tc(s) && !fifo8_is_empty(&s->cmdfifo)) { 350 s->cmdfifo_cdb_offset = 1; 351 s->do_cmd = 0; 352 do_cmd(s); 353 } 354 } 355 356 static void handle_satn(ESPState *s) 357 { 358 int32_t cmdlen; 359 360 if (s->dma && !s->dma_enabled) { 361 s->dma_cb = handle_satn; 362 return; 363 } 364 esp_set_pdma_cb(s, SATN_PDMA_CB); 365 cmdlen = get_cmd(s, ESP_CMDFIFO_SZ); 366 if (cmdlen > 0) { 367 s->cmdfifo_cdb_offset = 1; 368 s->do_cmd = 0; 369 do_cmd(s); 370 } else if (cmdlen == 0) { 371 s->do_cmd = 1; 372 /* Target present, but no cmd yet - switch to command phase */ 373 s->rregs[ESP_RSEQ] = SEQ_CD; 374 s->rregs[ESP_RSTAT] = STAT_CD; 375 } 376 } 377 378 static void s_without_satn_pdma_cb(ESPState *s) 379 { 380 if (!esp_get_tc(s) && !fifo8_is_empty(&s->cmdfifo)) { 381 s->cmdfifo_cdb_offset = 0; 382 s->do_cmd = 0; 383 do_cmd(s); 384 } 385 } 386 387 static void handle_s_without_atn(ESPState *s) 388 { 389 int32_t cmdlen; 390 391 if (s->dma && !s->dma_enabled) { 392 s->dma_cb = handle_s_without_atn; 393 return; 394 } 395 esp_set_pdma_cb(s, S_WITHOUT_SATN_PDMA_CB); 396 cmdlen = get_cmd(s, ESP_CMDFIFO_SZ); 397 if (cmdlen > 0) { 398 s->cmdfifo_cdb_offset = 0; 399 s->do_cmd = 0; 400 do_cmd(s); 401 } else if (cmdlen == 0) { 402 s->do_cmd = 1; 403 /* Target present, but no cmd yet - switch to command phase */ 404 s->rregs[ESP_RSEQ] = SEQ_CD; 405 s->rregs[ESP_RSTAT] = STAT_CD; 406 } 407 } 408 409 static void satn_stop_pdma_cb(ESPState *s) 410 { 411 if (!esp_get_tc(s) && !fifo8_is_empty(&s->cmdfifo)) { 412 trace_esp_handle_satn_stop(fifo8_num_used(&s->cmdfifo)); 413 s->do_cmd = 1; 414 s->cmdfifo_cdb_offset = 1; 415 s->rregs[ESP_RSTAT] = STAT_TC | STAT_CD; 416 s->rregs[ESP_RINTR] |= INTR_BS | INTR_FC; 417 s->rregs[ESP_RSEQ] = SEQ_CD; 418 esp_raise_irq(s); 419 } 420 } 421 422 static void handle_satn_stop(ESPState *s) 423 { 424 int32_t cmdlen; 425 426 if (s->dma && !s->dma_enabled) { 427 s->dma_cb = handle_satn_stop; 428 return; 429 } 430 esp_set_pdma_cb(s, SATN_STOP_PDMA_CB); 431 cmdlen = get_cmd(s, 1); 432 if (cmdlen > 0) { 433 trace_esp_handle_satn_stop(fifo8_num_used(&s->cmdfifo)); 434 s->do_cmd = 1; 435 s->cmdfifo_cdb_offset = 1; 436 s->rregs[ESP_RSTAT] = STAT_MO; 437 s->rregs[ESP_RINTR] |= INTR_BS | INTR_FC; 438 s->rregs[ESP_RSEQ] = SEQ_MO; 439 esp_raise_irq(s); 440 } else if (cmdlen == 0) { 441 s->do_cmd = 1; 442 /* Target present, switch to message out phase */ 443 s->rregs[ESP_RSEQ] = SEQ_MO; 444 s->rregs[ESP_RSTAT] = STAT_MO; 445 } 446 } 447 448 static void write_response_pdma_cb(ESPState *s) 449 { 450 s->rregs[ESP_RSTAT] = STAT_TC | STAT_ST; 451 s->rregs[ESP_RINTR] |= INTR_BS | INTR_FC; 452 s->rregs[ESP_RSEQ] = SEQ_CD; 453 esp_raise_irq(s); 454 } 455 456 static void write_response(ESPState *s) 457 { 458 uint8_t buf[2]; 459 460 trace_esp_write_response(s->status); 461 462 buf[0] = s->status; 463 buf[1] = 0; 464 465 if (s->dma) { 466 if (s->dma_memory_write) { 467 s->dma_memory_write(s->dma_opaque, buf, 2); 468 s->rregs[ESP_RSTAT] = STAT_TC | STAT_ST; 469 s->rregs[ESP_RINTR] |= INTR_BS | INTR_FC; 470 s->rregs[ESP_RSEQ] = SEQ_CD; 471 } else { 472 esp_set_pdma_cb(s, WRITE_RESPONSE_PDMA_CB); 473 esp_raise_drq(s); 474 return; 475 } 476 } else { 477 fifo8_reset(&s->fifo); 478 fifo8_push_all(&s->fifo, buf, 2); 479 s->rregs[ESP_RFLAGS] = 2; 480 } 481 esp_raise_irq(s); 482 } 483 484 static void esp_dma_done(ESPState *s) 485 { 486 s->rregs[ESP_RSTAT] |= STAT_TC; 487 s->rregs[ESP_RINTR] |= INTR_BS; 488 s->rregs[ESP_RFLAGS] = 0; 489 esp_set_tc(s, 0); 490 esp_raise_irq(s); 491 } 492 493 static void do_dma_pdma_cb(ESPState *s) 494 { 495 int to_device = ((s->rregs[ESP_RSTAT] & 7) == STAT_DO); 496 int len; 497 uint32_t n; 498 499 if (s->do_cmd) { 500 /* Ensure we have received complete command after SATN and stop */ 501 if (esp_get_tc(s) || fifo8_is_empty(&s->cmdfifo)) { 502 return; 503 } 504 505 s->ti_size = 0; 506 if ((s->rregs[ESP_RSTAT] & 7) == STAT_CD) { 507 /* No command received */ 508 if (s->cmdfifo_cdb_offset == fifo8_num_used(&s->cmdfifo)) { 509 return; 510 } 511 512 /* Command has been received */ 513 s->do_cmd = 0; 514 do_cmd(s); 515 } else { 516 /* 517 * Extra message out bytes received: update cmdfifo_cdb_offset 518 * and then switch to command phase 519 */ 520 s->cmdfifo_cdb_offset = fifo8_num_used(&s->cmdfifo); 521 s->rregs[ESP_RSTAT] = STAT_TC | STAT_CD; 522 s->rregs[ESP_RSEQ] = SEQ_CD; 523 s->rregs[ESP_RINTR] |= INTR_BS; 524 esp_raise_irq(s); 525 } 526 return; 527 } 528 529 if (!s->current_req) { 530 return; 531 } 532 533 if (to_device) { 534 /* Copy FIFO data to device */ 535 len = MIN(s->async_len, ESP_FIFO_SZ); 536 len = MIN(len, fifo8_num_used(&s->fifo)); 537 n = esp_fifo_pop_buf(&s->fifo, s->async_buf, len); 538 s->async_buf += n; 539 s->async_len -= n; 540 s->ti_size += n; 541 542 if (n < len) { 543 /* Unaligned accesses can cause FIFO wraparound */ 544 len = len - n; 545 n = esp_fifo_pop_buf(&s->fifo, s->async_buf, len); 546 s->async_buf += n; 547 s->async_len -= n; 548 s->ti_size += n; 549 } 550 551 if (s->async_len == 0) { 552 scsi_req_continue(s->current_req); 553 return; 554 } 555 556 if (esp_get_tc(s) == 0) { 557 esp_lower_drq(s); 558 esp_dma_done(s); 559 } 560 561 return; 562 } else { 563 if (s->async_len == 0) { 564 /* Defer until the scsi layer has completed */ 565 scsi_req_continue(s->current_req); 566 s->data_in_ready = false; 567 return; 568 } 569 570 if (esp_get_tc(s) != 0) { 571 /* Copy device data to FIFO */ 572 len = MIN(s->async_len, esp_get_tc(s)); 573 len = MIN(len, fifo8_num_free(&s->fifo)); 574 fifo8_push_all(&s->fifo, s->async_buf, len); 575 s->async_buf += len; 576 s->async_len -= len; 577 s->ti_size -= len; 578 esp_set_tc(s, esp_get_tc(s) - len); 579 580 if (esp_get_tc(s) == 0) { 581 /* Indicate transfer to FIFO is complete */ 582 s->rregs[ESP_RSTAT] |= STAT_TC; 583 } 584 return; 585 } 586 587 /* Partially filled a scsi buffer. Complete immediately. */ 588 esp_lower_drq(s); 589 esp_dma_done(s); 590 } 591 } 592 593 static void esp_do_dma(ESPState *s) 594 { 595 uint32_t len, cmdlen; 596 int to_device = ((s->rregs[ESP_RSTAT] & 7) == STAT_DO); 597 uint8_t buf[ESP_CMDFIFO_SZ]; 598 599 len = esp_get_tc(s); 600 if (s->do_cmd) { 601 /* 602 * handle_ti_cmd() case: esp_do_dma() is called only from 603 * handle_ti_cmd() with do_cmd != NULL (see the assert()) 604 */ 605 cmdlen = fifo8_num_used(&s->cmdfifo); 606 trace_esp_do_dma(cmdlen, len); 607 if (s->dma_memory_read) { 608 len = MIN(len, fifo8_num_free(&s->cmdfifo)); 609 s->dma_memory_read(s->dma_opaque, buf, len); 610 fifo8_push_all(&s->cmdfifo, buf, len); 611 } else { 612 esp_set_pdma_cb(s, DO_DMA_PDMA_CB); 613 esp_raise_drq(s); 614 return; 615 } 616 trace_esp_handle_ti_cmd(cmdlen); 617 s->ti_size = 0; 618 if ((s->rregs[ESP_RSTAT] & 7) == STAT_CD) { 619 /* No command received */ 620 if (s->cmdfifo_cdb_offset == fifo8_num_used(&s->cmdfifo)) { 621 return; 622 } 623 624 /* Command has been received */ 625 s->do_cmd = 0; 626 do_cmd(s); 627 } else { 628 /* 629 * Extra message out bytes received: update cmdfifo_cdb_offset 630 * and then switch to command phase 631 */ 632 s->cmdfifo_cdb_offset = fifo8_num_used(&s->cmdfifo); 633 s->rregs[ESP_RSTAT] = STAT_TC | STAT_CD; 634 s->rregs[ESP_RSEQ] = SEQ_CD; 635 s->rregs[ESP_RINTR] |= INTR_BS; 636 esp_raise_irq(s); 637 } 638 return; 639 } 640 if (!s->current_req) { 641 return; 642 } 643 if (s->async_len == 0) { 644 /* Defer until data is available. */ 645 return; 646 } 647 if (len > s->async_len) { 648 len = s->async_len; 649 } 650 if (to_device) { 651 if (s->dma_memory_read) { 652 s->dma_memory_read(s->dma_opaque, s->async_buf, len); 653 } else { 654 esp_set_pdma_cb(s, DO_DMA_PDMA_CB); 655 esp_raise_drq(s); 656 return; 657 } 658 } else { 659 if (s->dma_memory_write) { 660 s->dma_memory_write(s->dma_opaque, s->async_buf, len); 661 } else { 662 /* Adjust TC for any leftover data in the FIFO */ 663 if (!fifo8_is_empty(&s->fifo)) { 664 esp_set_tc(s, esp_get_tc(s) - fifo8_num_used(&s->fifo)); 665 } 666 667 /* Copy device data to FIFO */ 668 len = MIN(len, fifo8_num_free(&s->fifo)); 669 fifo8_push_all(&s->fifo, s->async_buf, len); 670 s->async_buf += len; 671 s->async_len -= len; 672 s->ti_size -= len; 673 674 /* 675 * MacOS toolbox uses a TI length of 16 bytes for all commands, so 676 * commands shorter than this must be padded accordingly 677 */ 678 if (len < esp_get_tc(s) && esp_get_tc(s) <= ESP_FIFO_SZ) { 679 while (fifo8_num_used(&s->fifo) < ESP_FIFO_SZ) { 680 esp_fifo_push(&s->fifo, 0); 681 len++; 682 } 683 } 684 685 esp_set_tc(s, esp_get_tc(s) - len); 686 esp_set_pdma_cb(s, DO_DMA_PDMA_CB); 687 esp_raise_drq(s); 688 689 /* Indicate transfer to FIFO is complete */ 690 s->rregs[ESP_RSTAT] |= STAT_TC; 691 return; 692 } 693 } 694 esp_set_tc(s, esp_get_tc(s) - len); 695 s->async_buf += len; 696 s->async_len -= len; 697 if (to_device) { 698 s->ti_size += len; 699 } else { 700 s->ti_size -= len; 701 } 702 if (s->async_len == 0) { 703 scsi_req_continue(s->current_req); 704 /* 705 * If there is still data to be read from the device then 706 * complete the DMA operation immediately. Otherwise defer 707 * until the scsi layer has completed. 708 */ 709 if (to_device || esp_get_tc(s) != 0 || s->ti_size == 0) { 710 return; 711 } 712 } 713 714 /* Partially filled a scsi buffer. Complete immediately. */ 715 esp_dma_done(s); 716 esp_lower_drq(s); 717 } 718 719 static void esp_do_nodma(ESPState *s) 720 { 721 int to_device = ((s->rregs[ESP_RSTAT] & 7) == STAT_DO); 722 uint32_t cmdlen; 723 int len; 724 725 if (s->do_cmd) { 726 cmdlen = fifo8_num_used(&s->cmdfifo); 727 trace_esp_handle_ti_cmd(cmdlen); 728 s->ti_size = 0; 729 if ((s->rregs[ESP_RSTAT] & 7) == STAT_CD) { 730 /* No command received */ 731 if (s->cmdfifo_cdb_offset == fifo8_num_used(&s->cmdfifo)) { 732 return; 733 } 734 735 /* Command has been received */ 736 s->do_cmd = 0; 737 do_cmd(s); 738 } else { 739 /* 740 * Extra message out bytes received: update cmdfifo_cdb_offset 741 * and then switch to command phase 742 */ 743 s->cmdfifo_cdb_offset = fifo8_num_used(&s->cmdfifo); 744 s->rregs[ESP_RSTAT] = STAT_TC | STAT_CD; 745 s->rregs[ESP_RSEQ] = SEQ_CD; 746 s->rregs[ESP_RINTR] |= INTR_BS; 747 esp_raise_irq(s); 748 } 749 return; 750 } 751 752 if (!s->current_req) { 753 return; 754 } 755 756 if (s->async_len == 0) { 757 /* Defer until data is available. */ 758 return; 759 } 760 761 if (to_device) { 762 len = MIN(fifo8_num_used(&s->fifo), ESP_FIFO_SZ); 763 esp_fifo_pop_buf(&s->fifo, s->async_buf, len); 764 s->async_buf += len; 765 s->async_len -= len; 766 s->ti_size += len; 767 } else { 768 if (fifo8_is_empty(&s->fifo)) { 769 fifo8_push(&s->fifo, s->async_buf[0]); 770 s->async_buf++; 771 s->async_len--; 772 s->ti_size--; 773 } 774 } 775 776 if (s->async_len == 0) { 777 scsi_req_continue(s->current_req); 778 return; 779 } 780 781 s->rregs[ESP_RINTR] |= INTR_BS; 782 esp_raise_irq(s); 783 } 784 785 static void esp_pdma_cb(ESPState *s) 786 { 787 switch (s->pdma_cb) { 788 case SATN_PDMA_CB: 789 satn_pdma_cb(s); 790 break; 791 case S_WITHOUT_SATN_PDMA_CB: 792 s_without_satn_pdma_cb(s); 793 break; 794 case SATN_STOP_PDMA_CB: 795 satn_stop_pdma_cb(s); 796 break; 797 case WRITE_RESPONSE_PDMA_CB: 798 write_response_pdma_cb(s); 799 break; 800 case DO_DMA_PDMA_CB: 801 do_dma_pdma_cb(s); 802 break; 803 default: 804 g_assert_not_reached(); 805 } 806 } 807 808 void esp_command_complete(SCSIRequest *req, size_t resid) 809 { 810 ESPState *s = req->hba_private; 811 int to_device = ((s->rregs[ESP_RSTAT] & 7) == STAT_DO); 812 813 trace_esp_command_complete(); 814 815 /* 816 * Non-DMA transfers from the target will leave the last byte in 817 * the FIFO so don't reset ti_size in this case 818 */ 819 if (s->dma || to_device) { 820 if (s->ti_size != 0) { 821 trace_esp_command_complete_unexpected(); 822 } 823 s->ti_size = 0; 824 } 825 826 s->async_len = 0; 827 if (req->status) { 828 trace_esp_command_complete_fail(); 829 } 830 s->status = req->status; 831 832 /* 833 * If the transfer is finished, switch to status phase. For non-DMA 834 * transfers from the target the last byte is still in the FIFO 835 */ 836 if (s->ti_size == 0) { 837 s->rregs[ESP_RSTAT] = STAT_TC | STAT_ST; 838 esp_dma_done(s); 839 esp_lower_drq(s); 840 } 841 842 if (s->current_req) { 843 scsi_req_unref(s->current_req); 844 s->current_req = NULL; 845 s->current_dev = NULL; 846 } 847 } 848 849 void esp_transfer_data(SCSIRequest *req, uint32_t len) 850 { 851 ESPState *s = req->hba_private; 852 int to_device = ((s->rregs[ESP_RSTAT] & 7) == STAT_DO); 853 uint32_t dmalen = esp_get_tc(s); 854 855 assert(!s->do_cmd); 856 trace_esp_transfer_data(dmalen, s->ti_size); 857 s->async_len = len; 858 s->async_buf = scsi_req_get_buf(req); 859 860 if (!to_device && !s->data_in_ready) { 861 /* 862 * Initial incoming data xfer is complete so raise command 863 * completion interrupt 864 */ 865 s->data_in_ready = true; 866 s->rregs[ESP_RSTAT] |= STAT_TC; 867 s->rregs[ESP_RINTR] |= INTR_BS; 868 esp_raise_irq(s); 869 } 870 871 if (s->ti_cmd == 0) { 872 /* 873 * Always perform the initial transfer upon reception of the next TI 874 * command to ensure the DMA/non-DMA status of the command is correct. 875 * It is not possible to use s->dma directly in the section below as 876 * some OSs send non-DMA NOP commands after a DMA transfer. Hence if the 877 * async data transfer is delayed then s->dma is set incorrectly. 878 */ 879 return; 880 } 881 882 if (s->ti_cmd == (CMD_TI | CMD_DMA)) { 883 if (dmalen) { 884 esp_do_dma(s); 885 } else if (s->ti_size <= 0) { 886 /* 887 * If this was the last part of a DMA transfer then the 888 * completion interrupt is deferred to here. 889 */ 890 esp_dma_done(s); 891 esp_lower_drq(s); 892 } 893 } else if (s->ti_cmd == CMD_TI) { 894 esp_do_nodma(s); 895 } 896 } 897 898 static void handle_ti(ESPState *s) 899 { 900 uint32_t dmalen; 901 902 if (s->dma && !s->dma_enabled) { 903 s->dma_cb = handle_ti; 904 return; 905 } 906 907 s->ti_cmd = s->rregs[ESP_CMD]; 908 if (s->dma) { 909 dmalen = esp_get_tc(s); 910 trace_esp_handle_ti(dmalen); 911 s->rregs[ESP_RSTAT] &= ~STAT_TC; 912 esp_do_dma(s); 913 } else { 914 trace_esp_handle_ti(s->ti_size); 915 esp_do_nodma(s); 916 } 917 } 918 919 void esp_hard_reset(ESPState *s) 920 { 921 memset(s->rregs, 0, ESP_REGS); 922 memset(s->wregs, 0, ESP_REGS); 923 s->tchi_written = 0; 924 s->ti_size = 0; 925 s->async_len = 0; 926 fifo8_reset(&s->fifo); 927 fifo8_reset(&s->cmdfifo); 928 s->dma = 0; 929 s->do_cmd = 0; 930 s->dma_cb = NULL; 931 932 s->rregs[ESP_CFG1] = 7; 933 } 934 935 static void esp_soft_reset(ESPState *s) 936 { 937 qemu_irq_lower(s->irq); 938 qemu_irq_lower(s->irq_data); 939 esp_hard_reset(s); 940 } 941 942 static void esp_bus_reset(ESPState *s) 943 { 944 bus_cold_reset(BUS(&s->bus)); 945 } 946 947 static void parent_esp_reset(ESPState *s, int irq, int level) 948 { 949 if (level) { 950 esp_soft_reset(s); 951 } 952 } 953 954 uint64_t esp_reg_read(ESPState *s, uint32_t saddr) 955 { 956 uint32_t val; 957 958 switch (saddr) { 959 case ESP_FIFO: 960 if (s->dma_memory_read && s->dma_memory_write && 961 (s->rregs[ESP_RSTAT] & STAT_PIO_MASK) == 0) { 962 /* Data out. */ 963 qemu_log_mask(LOG_UNIMP, "esp: PIO data read not implemented\n"); 964 s->rregs[ESP_FIFO] = 0; 965 } else { 966 if ((s->rregs[ESP_RSTAT] & 0x7) == STAT_DI) { 967 if (s->ti_size) { 968 esp_do_nodma(s); 969 } else { 970 /* 971 * The last byte of a non-DMA transfer has been read out 972 * of the FIFO so switch to status phase 973 */ 974 s->rregs[ESP_RSTAT] = STAT_TC | STAT_ST; 975 } 976 } 977 s->rregs[ESP_FIFO] = esp_fifo_pop(&s->fifo); 978 } 979 val = s->rregs[ESP_FIFO]; 980 break; 981 case ESP_RINTR: 982 /* 983 * Clear sequence step, interrupt register and all status bits 984 * except TC 985 */ 986 val = s->rregs[ESP_RINTR]; 987 s->rregs[ESP_RINTR] = 0; 988 s->rregs[ESP_RSTAT] &= ~STAT_TC; 989 /* 990 * According to the datasheet ESP_RSEQ should be cleared, but as the 991 * emulation currently defers information transfers to the next TI 992 * command leave it for now so that pedantic guests such as the old 993 * Linux 2.6 driver see the correct flags before the next SCSI phase 994 * transition. 995 * 996 * s->rregs[ESP_RSEQ] = SEQ_0; 997 */ 998 esp_lower_irq(s); 999 break; 1000 case ESP_TCHI: 1001 /* Return the unique id if the value has never been written */ 1002 if (!s->tchi_written) { 1003 val = s->chip_id; 1004 } else { 1005 val = s->rregs[saddr]; 1006 } 1007 break; 1008 case ESP_RFLAGS: 1009 /* Bottom 5 bits indicate number of bytes in FIFO */ 1010 val = fifo8_num_used(&s->fifo); 1011 break; 1012 default: 1013 val = s->rregs[saddr]; 1014 break; 1015 } 1016 1017 trace_esp_mem_readb(saddr, val); 1018 return val; 1019 } 1020 1021 void esp_reg_write(ESPState *s, uint32_t saddr, uint64_t val) 1022 { 1023 trace_esp_mem_writeb(saddr, s->wregs[saddr], val); 1024 switch (saddr) { 1025 case ESP_TCHI: 1026 s->tchi_written = true; 1027 /* fall through */ 1028 case ESP_TCLO: 1029 case ESP_TCMID: 1030 s->rregs[ESP_RSTAT] &= ~STAT_TC; 1031 break; 1032 case ESP_FIFO: 1033 if (s->do_cmd) { 1034 esp_fifo_push(&s->cmdfifo, val); 1035 1036 /* 1037 * If any unexpected message out/command phase data is 1038 * transferred using non-DMA, raise the interrupt 1039 */ 1040 if (s->rregs[ESP_CMD] == CMD_TI) { 1041 s->rregs[ESP_RINTR] |= INTR_BS; 1042 esp_raise_irq(s); 1043 } 1044 } else { 1045 esp_fifo_push(&s->fifo, val); 1046 } 1047 break; 1048 case ESP_CMD: 1049 s->rregs[saddr] = val; 1050 if (val & CMD_DMA) { 1051 s->dma = 1; 1052 /* Reload DMA counter. */ 1053 if (esp_get_stc(s) == 0) { 1054 esp_set_tc(s, 0x10000); 1055 } else { 1056 esp_set_tc(s, esp_get_stc(s)); 1057 } 1058 } else { 1059 s->dma = 0; 1060 } 1061 switch (val & CMD_CMD) { 1062 case CMD_NOP: 1063 trace_esp_mem_writeb_cmd_nop(val); 1064 break; 1065 case CMD_FLUSH: 1066 trace_esp_mem_writeb_cmd_flush(val); 1067 fifo8_reset(&s->fifo); 1068 break; 1069 case CMD_RESET: 1070 trace_esp_mem_writeb_cmd_reset(val); 1071 esp_soft_reset(s); 1072 break; 1073 case CMD_BUSRESET: 1074 trace_esp_mem_writeb_cmd_bus_reset(val); 1075 esp_bus_reset(s); 1076 if (!(s->wregs[ESP_CFG1] & CFG1_RESREPT)) { 1077 s->rregs[ESP_RINTR] |= INTR_RST; 1078 esp_raise_irq(s); 1079 } 1080 break; 1081 case CMD_TI: 1082 trace_esp_mem_writeb_cmd_ti(val); 1083 handle_ti(s); 1084 break; 1085 case CMD_ICCS: 1086 trace_esp_mem_writeb_cmd_iccs(val); 1087 write_response(s); 1088 s->rregs[ESP_RINTR] |= INTR_FC; 1089 s->rregs[ESP_RSTAT] |= STAT_MI; 1090 break; 1091 case CMD_MSGACC: 1092 trace_esp_mem_writeb_cmd_msgacc(val); 1093 s->rregs[ESP_RINTR] |= INTR_DC; 1094 s->rregs[ESP_RSEQ] = 0; 1095 s->rregs[ESP_RFLAGS] = 0; 1096 esp_raise_irq(s); 1097 break; 1098 case CMD_PAD: 1099 trace_esp_mem_writeb_cmd_pad(val); 1100 s->rregs[ESP_RSTAT] = STAT_TC; 1101 s->rregs[ESP_RINTR] |= INTR_FC; 1102 s->rregs[ESP_RSEQ] = 0; 1103 break; 1104 case CMD_SATN: 1105 trace_esp_mem_writeb_cmd_satn(val); 1106 break; 1107 case CMD_RSTATN: 1108 trace_esp_mem_writeb_cmd_rstatn(val); 1109 break; 1110 case CMD_SEL: 1111 trace_esp_mem_writeb_cmd_sel(val); 1112 handle_s_without_atn(s); 1113 break; 1114 case CMD_SELATN: 1115 trace_esp_mem_writeb_cmd_selatn(val); 1116 handle_satn(s); 1117 break; 1118 case CMD_SELATNS: 1119 trace_esp_mem_writeb_cmd_selatns(val); 1120 handle_satn_stop(s); 1121 break; 1122 case CMD_ENSEL: 1123 trace_esp_mem_writeb_cmd_ensel(val); 1124 s->rregs[ESP_RINTR] = 0; 1125 break; 1126 case CMD_DISSEL: 1127 trace_esp_mem_writeb_cmd_dissel(val); 1128 s->rregs[ESP_RINTR] = 0; 1129 esp_raise_irq(s); 1130 break; 1131 default: 1132 trace_esp_error_unhandled_command(val); 1133 break; 1134 } 1135 break; 1136 case ESP_WBUSID ... ESP_WSYNO: 1137 break; 1138 case ESP_CFG1: 1139 case ESP_CFG2: case ESP_CFG3: 1140 case ESP_RES3: case ESP_RES4: 1141 s->rregs[saddr] = val; 1142 break; 1143 case ESP_WCCF ... ESP_WTEST: 1144 break; 1145 default: 1146 trace_esp_error_invalid_write(val, saddr); 1147 return; 1148 } 1149 s->wregs[saddr] = val; 1150 } 1151 1152 static bool esp_mem_accepts(void *opaque, hwaddr addr, 1153 unsigned size, bool is_write, 1154 MemTxAttrs attrs) 1155 { 1156 return (size == 1) || (is_write && size == 4); 1157 } 1158 1159 static bool esp_is_before_version_5(void *opaque, int version_id) 1160 { 1161 ESPState *s = ESP(opaque); 1162 1163 version_id = MIN(version_id, s->mig_version_id); 1164 return version_id < 5; 1165 } 1166 1167 static bool esp_is_version_5(void *opaque, int version_id) 1168 { 1169 ESPState *s = ESP(opaque); 1170 1171 version_id = MIN(version_id, s->mig_version_id); 1172 return version_id >= 5; 1173 } 1174 1175 static bool esp_is_version_6(void *opaque, int version_id) 1176 { 1177 ESPState *s = ESP(opaque); 1178 1179 version_id = MIN(version_id, s->mig_version_id); 1180 return version_id >= 6; 1181 } 1182 1183 int esp_pre_save(void *opaque) 1184 { 1185 ESPState *s = ESP(object_resolve_path_component( 1186 OBJECT(opaque), "esp")); 1187 1188 s->mig_version_id = vmstate_esp.version_id; 1189 return 0; 1190 } 1191 1192 static int esp_post_load(void *opaque, int version_id) 1193 { 1194 ESPState *s = ESP(opaque); 1195 int len, i; 1196 1197 version_id = MIN(version_id, s->mig_version_id); 1198 1199 if (version_id < 5) { 1200 esp_set_tc(s, s->mig_dma_left); 1201 1202 /* Migrate ti_buf to fifo */ 1203 len = s->mig_ti_wptr - s->mig_ti_rptr; 1204 for (i = 0; i < len; i++) { 1205 fifo8_push(&s->fifo, s->mig_ti_buf[i]); 1206 } 1207 1208 /* Migrate cmdbuf to cmdfifo */ 1209 for (i = 0; i < s->mig_cmdlen; i++) { 1210 fifo8_push(&s->cmdfifo, s->mig_cmdbuf[i]); 1211 } 1212 } 1213 1214 s->mig_version_id = vmstate_esp.version_id; 1215 return 0; 1216 } 1217 1218 /* 1219 * PDMA (or pseudo-DMA) is only used on the Macintosh and requires the 1220 * guest CPU to perform the transfers between the SCSI bus and memory 1221 * itself. This is indicated by the dma_memory_read and dma_memory_write 1222 * functions being NULL (in contrast to the ESP PCI device) whilst 1223 * dma_enabled is still set. 1224 */ 1225 1226 static bool esp_pdma_needed(void *opaque) 1227 { 1228 ESPState *s = ESP(opaque); 1229 1230 return s->dma_memory_read == NULL && s->dma_memory_write == NULL && 1231 s->dma_enabled; 1232 } 1233 1234 static const VMStateDescription vmstate_esp_pdma = { 1235 .name = "esp/pdma", 1236 .version_id = 0, 1237 .minimum_version_id = 0, 1238 .needed = esp_pdma_needed, 1239 .fields = (VMStateField[]) { 1240 VMSTATE_UINT8(pdma_cb, ESPState), 1241 VMSTATE_END_OF_LIST() 1242 } 1243 }; 1244 1245 const VMStateDescription vmstate_esp = { 1246 .name = "esp", 1247 .version_id = 6, 1248 .minimum_version_id = 3, 1249 .post_load = esp_post_load, 1250 .fields = (VMStateField[]) { 1251 VMSTATE_BUFFER(rregs, ESPState), 1252 VMSTATE_BUFFER(wregs, ESPState), 1253 VMSTATE_INT32(ti_size, ESPState), 1254 VMSTATE_UINT32_TEST(mig_ti_rptr, ESPState, esp_is_before_version_5), 1255 VMSTATE_UINT32_TEST(mig_ti_wptr, ESPState, esp_is_before_version_5), 1256 VMSTATE_BUFFER_TEST(mig_ti_buf, ESPState, esp_is_before_version_5), 1257 VMSTATE_UINT32(status, ESPState), 1258 VMSTATE_UINT32_TEST(mig_deferred_status, ESPState, 1259 esp_is_before_version_5), 1260 VMSTATE_BOOL_TEST(mig_deferred_complete, ESPState, 1261 esp_is_before_version_5), 1262 VMSTATE_UINT32(dma, ESPState), 1263 VMSTATE_STATIC_BUFFER(mig_cmdbuf, ESPState, 0, 1264 esp_is_before_version_5, 0, 16), 1265 VMSTATE_STATIC_BUFFER(mig_cmdbuf, ESPState, 4, 1266 esp_is_before_version_5, 16, 1267 sizeof(typeof_field(ESPState, mig_cmdbuf))), 1268 VMSTATE_UINT32_TEST(mig_cmdlen, ESPState, esp_is_before_version_5), 1269 VMSTATE_UINT32(do_cmd, ESPState), 1270 VMSTATE_UINT32_TEST(mig_dma_left, ESPState, esp_is_before_version_5), 1271 VMSTATE_BOOL_TEST(data_in_ready, ESPState, esp_is_version_5), 1272 VMSTATE_UINT8_TEST(cmdfifo_cdb_offset, ESPState, esp_is_version_5), 1273 VMSTATE_FIFO8_TEST(fifo, ESPState, esp_is_version_5), 1274 VMSTATE_FIFO8_TEST(cmdfifo, ESPState, esp_is_version_5), 1275 VMSTATE_UINT8_TEST(ti_cmd, ESPState, esp_is_version_5), 1276 VMSTATE_UINT8_TEST(lun, ESPState, esp_is_version_6), 1277 VMSTATE_END_OF_LIST() 1278 }, 1279 .subsections = (const VMStateDescription * []) { 1280 &vmstate_esp_pdma, 1281 NULL 1282 } 1283 }; 1284 1285 static void sysbus_esp_mem_write(void *opaque, hwaddr addr, 1286 uint64_t val, unsigned int size) 1287 { 1288 SysBusESPState *sysbus = opaque; 1289 ESPState *s = ESP(&sysbus->esp); 1290 uint32_t saddr; 1291 1292 saddr = addr >> sysbus->it_shift; 1293 esp_reg_write(s, saddr, val); 1294 } 1295 1296 static uint64_t sysbus_esp_mem_read(void *opaque, hwaddr addr, 1297 unsigned int size) 1298 { 1299 SysBusESPState *sysbus = opaque; 1300 ESPState *s = ESP(&sysbus->esp); 1301 uint32_t saddr; 1302 1303 saddr = addr >> sysbus->it_shift; 1304 return esp_reg_read(s, saddr); 1305 } 1306 1307 static const MemoryRegionOps sysbus_esp_mem_ops = { 1308 .read = sysbus_esp_mem_read, 1309 .write = sysbus_esp_mem_write, 1310 .endianness = DEVICE_NATIVE_ENDIAN, 1311 .valid.accepts = esp_mem_accepts, 1312 }; 1313 1314 static void sysbus_esp_pdma_write(void *opaque, hwaddr addr, 1315 uint64_t val, unsigned int size) 1316 { 1317 SysBusESPState *sysbus = opaque; 1318 ESPState *s = ESP(&sysbus->esp); 1319 1320 trace_esp_pdma_write(size); 1321 1322 switch (size) { 1323 case 1: 1324 esp_pdma_write(s, val); 1325 break; 1326 case 2: 1327 esp_pdma_write(s, val >> 8); 1328 esp_pdma_write(s, val); 1329 break; 1330 } 1331 esp_pdma_cb(s); 1332 } 1333 1334 static uint64_t sysbus_esp_pdma_read(void *opaque, hwaddr addr, 1335 unsigned int size) 1336 { 1337 SysBusESPState *sysbus = opaque; 1338 ESPState *s = ESP(&sysbus->esp); 1339 uint64_t val = 0; 1340 1341 trace_esp_pdma_read(size); 1342 1343 switch (size) { 1344 case 1: 1345 val = esp_pdma_read(s); 1346 break; 1347 case 2: 1348 val = esp_pdma_read(s); 1349 val = (val << 8) | esp_pdma_read(s); 1350 break; 1351 } 1352 if (fifo8_num_used(&s->fifo) < 2) { 1353 esp_pdma_cb(s); 1354 } 1355 return val; 1356 } 1357 1358 static void *esp_load_request(QEMUFile *f, SCSIRequest *req) 1359 { 1360 ESPState *s = container_of(req->bus, ESPState, bus); 1361 1362 scsi_req_ref(req); 1363 s->current_req = req; 1364 return s; 1365 } 1366 1367 static const MemoryRegionOps sysbus_esp_pdma_ops = { 1368 .read = sysbus_esp_pdma_read, 1369 .write = sysbus_esp_pdma_write, 1370 .endianness = DEVICE_NATIVE_ENDIAN, 1371 .valid.min_access_size = 1, 1372 .valid.max_access_size = 4, 1373 .impl.min_access_size = 1, 1374 .impl.max_access_size = 2, 1375 }; 1376 1377 static const struct SCSIBusInfo esp_scsi_info = { 1378 .tcq = false, 1379 .max_target = ESP_MAX_DEVS, 1380 .max_lun = 7, 1381 1382 .load_request = esp_load_request, 1383 .transfer_data = esp_transfer_data, 1384 .complete = esp_command_complete, 1385 .cancel = esp_request_cancelled 1386 }; 1387 1388 static void sysbus_esp_gpio_demux(void *opaque, int irq, int level) 1389 { 1390 SysBusESPState *sysbus = SYSBUS_ESP(opaque); 1391 ESPState *s = ESP(&sysbus->esp); 1392 1393 switch (irq) { 1394 case 0: 1395 parent_esp_reset(s, irq, level); 1396 break; 1397 case 1: 1398 esp_dma_enable(opaque, irq, level); 1399 break; 1400 } 1401 } 1402 1403 static void sysbus_esp_realize(DeviceState *dev, Error **errp) 1404 { 1405 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 1406 SysBusESPState *sysbus = SYSBUS_ESP(dev); 1407 ESPState *s = ESP(&sysbus->esp); 1408 1409 if (!qdev_realize(DEVICE(s), NULL, errp)) { 1410 return; 1411 } 1412 1413 sysbus_init_irq(sbd, &s->irq); 1414 sysbus_init_irq(sbd, &s->irq_data); 1415 assert(sysbus->it_shift != -1); 1416 1417 s->chip_id = TCHI_FAS100A; 1418 memory_region_init_io(&sysbus->iomem, OBJECT(sysbus), &sysbus_esp_mem_ops, 1419 sysbus, "esp-regs", ESP_REGS << sysbus->it_shift); 1420 sysbus_init_mmio(sbd, &sysbus->iomem); 1421 memory_region_init_io(&sysbus->pdma, OBJECT(sysbus), &sysbus_esp_pdma_ops, 1422 sysbus, "esp-pdma", 4); 1423 sysbus_init_mmio(sbd, &sysbus->pdma); 1424 1425 qdev_init_gpio_in(dev, sysbus_esp_gpio_demux, 2); 1426 1427 scsi_bus_init(&s->bus, sizeof(s->bus), dev, &esp_scsi_info); 1428 } 1429 1430 static void sysbus_esp_hard_reset(DeviceState *dev) 1431 { 1432 SysBusESPState *sysbus = SYSBUS_ESP(dev); 1433 ESPState *s = ESP(&sysbus->esp); 1434 1435 esp_hard_reset(s); 1436 } 1437 1438 static void sysbus_esp_init(Object *obj) 1439 { 1440 SysBusESPState *sysbus = SYSBUS_ESP(obj); 1441 1442 object_initialize_child(obj, "esp", &sysbus->esp, TYPE_ESP); 1443 } 1444 1445 static const VMStateDescription vmstate_sysbus_esp_scsi = { 1446 .name = "sysbusespscsi", 1447 .version_id = 2, 1448 .minimum_version_id = 1, 1449 .pre_save = esp_pre_save, 1450 .fields = (VMStateField[]) { 1451 VMSTATE_UINT8_V(esp.mig_version_id, SysBusESPState, 2), 1452 VMSTATE_STRUCT(esp, SysBusESPState, 0, vmstate_esp, ESPState), 1453 VMSTATE_END_OF_LIST() 1454 } 1455 }; 1456 1457 static void sysbus_esp_class_init(ObjectClass *klass, void *data) 1458 { 1459 DeviceClass *dc = DEVICE_CLASS(klass); 1460 1461 dc->realize = sysbus_esp_realize; 1462 dc->reset = sysbus_esp_hard_reset; 1463 dc->vmsd = &vmstate_sysbus_esp_scsi; 1464 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1465 } 1466 1467 static const TypeInfo sysbus_esp_info = { 1468 .name = TYPE_SYSBUS_ESP, 1469 .parent = TYPE_SYS_BUS_DEVICE, 1470 .instance_init = sysbus_esp_init, 1471 .instance_size = sizeof(SysBusESPState), 1472 .class_init = sysbus_esp_class_init, 1473 }; 1474 1475 static void esp_finalize(Object *obj) 1476 { 1477 ESPState *s = ESP(obj); 1478 1479 fifo8_destroy(&s->fifo); 1480 fifo8_destroy(&s->cmdfifo); 1481 } 1482 1483 static void esp_init(Object *obj) 1484 { 1485 ESPState *s = ESP(obj); 1486 1487 fifo8_create(&s->fifo, ESP_FIFO_SZ); 1488 fifo8_create(&s->cmdfifo, ESP_CMDFIFO_SZ); 1489 } 1490 1491 static void esp_class_init(ObjectClass *klass, void *data) 1492 { 1493 DeviceClass *dc = DEVICE_CLASS(klass); 1494 1495 /* internal device for sysbusesp/pciespscsi, not user-creatable */ 1496 dc->user_creatable = false; 1497 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1498 } 1499 1500 static const TypeInfo esp_info = { 1501 .name = TYPE_ESP, 1502 .parent = TYPE_DEVICE, 1503 .instance_init = esp_init, 1504 .instance_finalize = esp_finalize, 1505 .instance_size = sizeof(ESPState), 1506 .class_init = esp_class_init, 1507 }; 1508 1509 static void esp_register_types(void) 1510 { 1511 type_register_static(&sysbus_esp_info); 1512 type_register_static(&esp_info); 1513 } 1514 1515 type_init(esp_register_types) 1516