1 /* 2 * QEMU AHCI Emulation 3 * 4 * Copyright (c) 2010 qiaochong@loongson.cn 5 * Copyright (c) 2010 Roland Elek <elek.roland@gmail.com> 6 * Copyright (c) 2010 Sebastian Herbszt <herbszt@gmx.de> 7 * Copyright (c) 2010 Alexander Graf <agraf@suse.de> 8 * 9 * This library is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2 of the License, or (at your option) any later version. 13 * 14 * This library is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 21 * 22 */ 23 24 #include <hw/hw.h> 25 #include <hw/pci/msi.h> 26 #include <hw/i386/pc.h> 27 #include <hw/pci/pci.h> 28 #include <hw/sysbus.h> 29 30 #include "qemu/error-report.h" 31 #include "sysemu/block-backend.h" 32 #include "sysemu/dma.h" 33 #include "internal.h" 34 #include <hw/ide/pci.h> 35 #include <hw/ide/ahci.h> 36 37 #define DEBUG_AHCI 0 38 39 #define DPRINTF(port, fmt, ...) \ 40 do { \ 41 if (DEBUG_AHCI) { \ 42 fprintf(stderr, "ahci: %s: [%d] ", __func__, port); \ 43 fprintf(stderr, fmt, ## __VA_ARGS__); \ 44 } \ 45 } while (0) 46 47 static void check_cmd(AHCIState *s, int port); 48 static int handle_cmd(AHCIState *s,int port,int slot); 49 static void ahci_reset_port(AHCIState *s, int port); 50 static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis); 51 static void ahci_init_d2h(AHCIDevice *ad); 52 static int ahci_dma_prepare_buf(IDEDMA *dma, int32_t limit); 53 static void ahci_commit_buf(IDEDMA *dma, uint32_t tx_bytes); 54 static bool ahci_map_clb_address(AHCIDevice *ad); 55 static bool ahci_map_fis_address(AHCIDevice *ad); 56 static void ahci_unmap_clb_address(AHCIDevice *ad); 57 static void ahci_unmap_fis_address(AHCIDevice *ad); 58 59 60 static uint32_t ahci_port_read(AHCIState *s, int port, int offset) 61 { 62 uint32_t val; 63 AHCIPortRegs *pr; 64 pr = &s->dev[port].port_regs; 65 66 switch (offset) { 67 case PORT_LST_ADDR: 68 val = pr->lst_addr; 69 break; 70 case PORT_LST_ADDR_HI: 71 val = pr->lst_addr_hi; 72 break; 73 case PORT_FIS_ADDR: 74 val = pr->fis_addr; 75 break; 76 case PORT_FIS_ADDR_HI: 77 val = pr->fis_addr_hi; 78 break; 79 case PORT_IRQ_STAT: 80 val = pr->irq_stat; 81 break; 82 case PORT_IRQ_MASK: 83 val = pr->irq_mask; 84 break; 85 case PORT_CMD: 86 val = pr->cmd; 87 break; 88 case PORT_TFDATA: 89 val = pr->tfdata; 90 break; 91 case PORT_SIG: 92 val = pr->sig; 93 break; 94 case PORT_SCR_STAT: 95 if (s->dev[port].port.ifs[0].blk) { 96 val = SATA_SCR_SSTATUS_DET_DEV_PRESENT_PHY_UP | 97 SATA_SCR_SSTATUS_SPD_GEN1 | SATA_SCR_SSTATUS_IPM_ACTIVE; 98 } else { 99 val = SATA_SCR_SSTATUS_DET_NODEV; 100 } 101 break; 102 case PORT_SCR_CTL: 103 val = pr->scr_ctl; 104 break; 105 case PORT_SCR_ERR: 106 val = pr->scr_err; 107 break; 108 case PORT_SCR_ACT: 109 pr->scr_act &= ~s->dev[port].finished; 110 s->dev[port].finished = 0; 111 val = pr->scr_act; 112 break; 113 case PORT_CMD_ISSUE: 114 val = pr->cmd_issue; 115 break; 116 case PORT_RESERVED: 117 default: 118 val = 0; 119 } 120 DPRINTF(port, "offset: 0x%x val: 0x%x\n", offset, val); 121 return val; 122 123 } 124 125 static void ahci_irq_raise(AHCIState *s, AHCIDevice *dev) 126 { 127 AHCIPCIState *d = container_of(s, AHCIPCIState, ahci); 128 PCIDevice *pci_dev = 129 (PCIDevice *)object_dynamic_cast(OBJECT(d), TYPE_PCI_DEVICE); 130 131 DPRINTF(0, "raise irq\n"); 132 133 if (pci_dev && msi_enabled(pci_dev)) { 134 msi_notify(pci_dev, 0); 135 } else { 136 qemu_irq_raise(s->irq); 137 } 138 } 139 140 static void ahci_irq_lower(AHCIState *s, AHCIDevice *dev) 141 { 142 AHCIPCIState *d = container_of(s, AHCIPCIState, ahci); 143 PCIDevice *pci_dev = 144 (PCIDevice *)object_dynamic_cast(OBJECT(d), TYPE_PCI_DEVICE); 145 146 DPRINTF(0, "lower irq\n"); 147 148 if (!pci_dev || !msi_enabled(pci_dev)) { 149 qemu_irq_lower(s->irq); 150 } 151 } 152 153 static void ahci_check_irq(AHCIState *s) 154 { 155 int i; 156 157 DPRINTF(-1, "check irq %#x\n", s->control_regs.irqstatus); 158 159 s->control_regs.irqstatus = 0; 160 for (i = 0; i < s->ports; i++) { 161 AHCIPortRegs *pr = &s->dev[i].port_regs; 162 if (pr->irq_stat & pr->irq_mask) { 163 s->control_regs.irqstatus |= (1 << i); 164 } 165 } 166 167 if (s->control_regs.irqstatus && 168 (s->control_regs.ghc & HOST_CTL_IRQ_EN)) { 169 ahci_irq_raise(s, NULL); 170 } else { 171 ahci_irq_lower(s, NULL); 172 } 173 } 174 175 static void ahci_trigger_irq(AHCIState *s, AHCIDevice *d, 176 int irq_type) 177 { 178 DPRINTF(d->port_no, "trigger irq %#x -> %x\n", 179 irq_type, d->port_regs.irq_mask & irq_type); 180 181 d->port_regs.irq_stat |= irq_type; 182 ahci_check_irq(s); 183 } 184 185 static void map_page(AddressSpace *as, uint8_t **ptr, uint64_t addr, 186 uint32_t wanted) 187 { 188 hwaddr len = wanted; 189 190 if (*ptr) { 191 dma_memory_unmap(as, *ptr, len, DMA_DIRECTION_FROM_DEVICE, len); 192 } 193 194 *ptr = dma_memory_map(as, addr, &len, DMA_DIRECTION_FROM_DEVICE); 195 if (len < wanted) { 196 dma_memory_unmap(as, *ptr, len, DMA_DIRECTION_FROM_DEVICE, len); 197 *ptr = NULL; 198 } 199 } 200 201 /** 202 * Check the cmd register to see if we should start or stop 203 * the DMA or FIS RX engines. 204 * 205 * @ad: Device to engage. 206 * @allow_stop: Allow device to transition from started to stopped? 207 * 'no' is useful for migration post_load, which does not expect a transition. 208 * 209 * @return 0 on success, -1 on error. 210 */ 211 static int ahci_cond_start_engines(AHCIDevice *ad, bool allow_stop) 212 { 213 AHCIPortRegs *pr = &ad->port_regs; 214 215 if (pr->cmd & PORT_CMD_START) { 216 if (ahci_map_clb_address(ad)) { 217 pr->cmd |= PORT_CMD_LIST_ON; 218 } else { 219 error_report("AHCI: Failed to start DMA engine: " 220 "bad command list buffer address"); 221 return -1; 222 } 223 } else if (pr->cmd & PORT_CMD_LIST_ON) { 224 if (allow_stop) { 225 ahci_unmap_clb_address(ad); 226 pr->cmd = pr->cmd & ~(PORT_CMD_LIST_ON); 227 } else { 228 error_report("AHCI: DMA engine should be off, " 229 "but appears to still be running"); 230 return -1; 231 } 232 } 233 234 if (pr->cmd & PORT_CMD_FIS_RX) { 235 if (ahci_map_fis_address(ad)) { 236 pr->cmd |= PORT_CMD_FIS_ON; 237 } else { 238 error_report("AHCI: Failed to start FIS receive engine: " 239 "bad FIS receive buffer address"); 240 return -1; 241 } 242 } else if (pr->cmd & PORT_CMD_FIS_ON) { 243 if (allow_stop) { 244 ahci_unmap_fis_address(ad); 245 pr->cmd = pr->cmd & ~(PORT_CMD_FIS_ON); 246 } else { 247 error_report("AHCI: FIS receive engine should be off, " 248 "but appears to still be running"); 249 return -1; 250 } 251 } 252 253 return 0; 254 } 255 256 static void ahci_port_write(AHCIState *s, int port, int offset, uint32_t val) 257 { 258 AHCIPortRegs *pr = &s->dev[port].port_regs; 259 260 DPRINTF(port, "offset: 0x%x val: 0x%x\n", offset, val); 261 switch (offset) { 262 case PORT_LST_ADDR: 263 pr->lst_addr = val; 264 break; 265 case PORT_LST_ADDR_HI: 266 pr->lst_addr_hi = val; 267 break; 268 case PORT_FIS_ADDR: 269 pr->fis_addr = val; 270 break; 271 case PORT_FIS_ADDR_HI: 272 pr->fis_addr_hi = val; 273 break; 274 case PORT_IRQ_STAT: 275 pr->irq_stat &= ~val; 276 ahci_check_irq(s); 277 break; 278 case PORT_IRQ_MASK: 279 pr->irq_mask = val & 0xfdc000ff; 280 ahci_check_irq(s); 281 break; 282 case PORT_CMD: 283 /* Block any Read-only fields from being set; 284 * including LIST_ON and FIS_ON. */ 285 pr->cmd = (pr->cmd & PORT_CMD_RO_MASK) | (val & ~PORT_CMD_RO_MASK); 286 287 /* Check FIS RX and CLB engines, allow transition to false: */ 288 ahci_cond_start_engines(&s->dev[port], true); 289 290 /* XXX usually the FIS would be pending on the bus here and 291 issuing deferred until the OS enables FIS receival. 292 Instead, we only submit it once - which works in most 293 cases, but is a hack. */ 294 if ((pr->cmd & PORT_CMD_FIS_ON) && 295 !s->dev[port].init_d2h_sent) { 296 ahci_init_d2h(&s->dev[port]); 297 s->dev[port].init_d2h_sent = true; 298 } 299 300 check_cmd(s, port); 301 break; 302 case PORT_TFDATA: 303 /* Read Only. */ 304 break; 305 case PORT_SIG: 306 /* Read Only */ 307 break; 308 case PORT_SCR_STAT: 309 /* Read Only */ 310 break; 311 case PORT_SCR_CTL: 312 if (((pr->scr_ctl & AHCI_SCR_SCTL_DET) == 1) && 313 ((val & AHCI_SCR_SCTL_DET) == 0)) { 314 ahci_reset_port(s, port); 315 } 316 pr->scr_ctl = val; 317 break; 318 case PORT_SCR_ERR: 319 pr->scr_err &= ~val; 320 break; 321 case PORT_SCR_ACT: 322 /* RW1 */ 323 pr->scr_act |= val; 324 break; 325 case PORT_CMD_ISSUE: 326 pr->cmd_issue |= val; 327 check_cmd(s, port); 328 break; 329 default: 330 break; 331 } 332 } 333 334 static uint64_t ahci_mem_read_32(void *opaque, hwaddr addr) 335 { 336 AHCIState *s = opaque; 337 uint32_t val = 0; 338 339 if (addr < AHCI_GENERIC_HOST_CONTROL_REGS_MAX_ADDR) { 340 switch (addr) { 341 case HOST_CAP: 342 val = s->control_regs.cap; 343 break; 344 case HOST_CTL: 345 val = s->control_regs.ghc; 346 break; 347 case HOST_IRQ_STAT: 348 val = s->control_regs.irqstatus; 349 break; 350 case HOST_PORTS_IMPL: 351 val = s->control_regs.impl; 352 break; 353 case HOST_VERSION: 354 val = s->control_regs.version; 355 break; 356 } 357 358 DPRINTF(-1, "(addr 0x%08X), val 0x%08X\n", (unsigned) addr, val); 359 } else if ((addr >= AHCI_PORT_REGS_START_ADDR) && 360 (addr < (AHCI_PORT_REGS_START_ADDR + 361 (s->ports * AHCI_PORT_ADDR_OFFSET_LEN)))) { 362 val = ahci_port_read(s, (addr - AHCI_PORT_REGS_START_ADDR) >> 7, 363 addr & AHCI_PORT_ADDR_OFFSET_MASK); 364 } 365 366 return val; 367 } 368 369 370 /** 371 * AHCI 1.3 section 3 ("HBA Memory Registers") 372 * Support unaligned 8/16/32 bit reads, and 64 bit aligned reads. 373 * Caller is responsible for masking unwanted higher order bytes. 374 */ 375 static uint64_t ahci_mem_read(void *opaque, hwaddr addr, unsigned size) 376 { 377 hwaddr aligned = addr & ~0x3; 378 int ofst = addr - aligned; 379 uint64_t lo = ahci_mem_read_32(opaque, aligned); 380 uint64_t hi; 381 382 /* if < 8 byte read does not cross 4 byte boundary */ 383 if (ofst + size <= 4) { 384 return lo >> (ofst * 8); 385 } 386 g_assert_cmpint(size, >, 1); 387 388 /* If the 64bit read is unaligned, we will produce undefined 389 * results. AHCI does not support unaligned 64bit reads. */ 390 hi = ahci_mem_read_32(opaque, aligned + 4); 391 return (hi << 32 | lo) >> (ofst * 8); 392 } 393 394 395 static void ahci_mem_write(void *opaque, hwaddr addr, 396 uint64_t val, unsigned size) 397 { 398 AHCIState *s = opaque; 399 400 /* Only aligned reads are allowed on AHCI */ 401 if (addr & 3) { 402 fprintf(stderr, "ahci: Mis-aligned write to addr 0x" 403 TARGET_FMT_plx "\n", addr); 404 return; 405 } 406 407 if (addr < AHCI_GENERIC_HOST_CONTROL_REGS_MAX_ADDR) { 408 DPRINTF(-1, "(addr 0x%08X), val 0x%08"PRIX64"\n", (unsigned) addr, val); 409 410 switch (addr) { 411 case HOST_CAP: /* R/WO, RO */ 412 /* FIXME handle R/WO */ 413 break; 414 case HOST_CTL: /* R/W */ 415 if (val & HOST_CTL_RESET) { 416 DPRINTF(-1, "HBA Reset\n"); 417 ahci_reset(s); 418 } else { 419 s->control_regs.ghc = (val & 0x3) | HOST_CTL_AHCI_EN; 420 ahci_check_irq(s); 421 } 422 break; 423 case HOST_IRQ_STAT: /* R/WC, RO */ 424 s->control_regs.irqstatus &= ~val; 425 ahci_check_irq(s); 426 break; 427 case HOST_PORTS_IMPL: /* R/WO, RO */ 428 /* FIXME handle R/WO */ 429 break; 430 case HOST_VERSION: /* RO */ 431 /* FIXME report write? */ 432 break; 433 default: 434 DPRINTF(-1, "write to unknown register 0x%x\n", (unsigned)addr); 435 } 436 } else if ((addr >= AHCI_PORT_REGS_START_ADDR) && 437 (addr < (AHCI_PORT_REGS_START_ADDR + 438 (s->ports * AHCI_PORT_ADDR_OFFSET_LEN)))) { 439 ahci_port_write(s, (addr - AHCI_PORT_REGS_START_ADDR) >> 7, 440 addr & AHCI_PORT_ADDR_OFFSET_MASK, val); 441 } 442 443 } 444 445 static const MemoryRegionOps ahci_mem_ops = { 446 .read = ahci_mem_read, 447 .write = ahci_mem_write, 448 .endianness = DEVICE_LITTLE_ENDIAN, 449 }; 450 451 static uint64_t ahci_idp_read(void *opaque, hwaddr addr, 452 unsigned size) 453 { 454 AHCIState *s = opaque; 455 456 if (addr == s->idp_offset) { 457 /* index register */ 458 return s->idp_index; 459 } else if (addr == s->idp_offset + 4) { 460 /* data register - do memory read at location selected by index */ 461 return ahci_mem_read(opaque, s->idp_index, size); 462 } else { 463 return 0; 464 } 465 } 466 467 static void ahci_idp_write(void *opaque, hwaddr addr, 468 uint64_t val, unsigned size) 469 { 470 AHCIState *s = opaque; 471 472 if (addr == s->idp_offset) { 473 /* index register - mask off reserved bits */ 474 s->idp_index = (uint32_t)val & ((AHCI_MEM_BAR_SIZE - 1) & ~3); 475 } else if (addr == s->idp_offset + 4) { 476 /* data register - do memory write at location selected by index */ 477 ahci_mem_write(opaque, s->idp_index, val, size); 478 } 479 } 480 481 static const MemoryRegionOps ahci_idp_ops = { 482 .read = ahci_idp_read, 483 .write = ahci_idp_write, 484 .endianness = DEVICE_LITTLE_ENDIAN, 485 }; 486 487 488 static void ahci_reg_init(AHCIState *s) 489 { 490 int i; 491 492 s->control_regs.cap = (s->ports - 1) | 493 (AHCI_NUM_COMMAND_SLOTS << 8) | 494 (AHCI_SUPPORTED_SPEED_GEN1 << AHCI_SUPPORTED_SPEED) | 495 HOST_CAP_NCQ | HOST_CAP_AHCI; 496 497 s->control_regs.impl = (1 << s->ports) - 1; 498 499 s->control_regs.version = AHCI_VERSION_1_0; 500 501 for (i = 0; i < s->ports; i++) { 502 s->dev[i].port_state = STATE_RUN; 503 } 504 } 505 506 static void check_cmd(AHCIState *s, int port) 507 { 508 AHCIPortRegs *pr = &s->dev[port].port_regs; 509 int slot; 510 511 if ((pr->cmd & PORT_CMD_START) && pr->cmd_issue) { 512 for (slot = 0; (slot < 32) && pr->cmd_issue; slot++) { 513 if ((pr->cmd_issue & (1U << slot)) && 514 !handle_cmd(s, port, slot)) { 515 pr->cmd_issue &= ~(1U << slot); 516 } 517 } 518 } 519 } 520 521 static void ahci_check_cmd_bh(void *opaque) 522 { 523 AHCIDevice *ad = opaque; 524 525 qemu_bh_delete(ad->check_bh); 526 ad->check_bh = NULL; 527 528 if ((ad->busy_slot != -1) && 529 !(ad->port.ifs[0].status & (BUSY_STAT|DRQ_STAT))) { 530 /* no longer busy */ 531 ad->port_regs.cmd_issue &= ~(1 << ad->busy_slot); 532 ad->busy_slot = -1; 533 } 534 535 check_cmd(ad->hba, ad->port_no); 536 } 537 538 static void ahci_init_d2h(AHCIDevice *ad) 539 { 540 uint8_t init_fis[20]; 541 IDEState *ide_state = &ad->port.ifs[0]; 542 543 memset(init_fis, 0, sizeof(init_fis)); 544 545 init_fis[4] = 1; 546 init_fis[12] = 1; 547 548 if (ide_state->drive_kind == IDE_CD) { 549 init_fis[5] = ide_state->lcyl; 550 init_fis[6] = ide_state->hcyl; 551 } 552 553 ahci_write_fis_d2h(ad, init_fis); 554 } 555 556 static void ahci_reset_port(AHCIState *s, int port) 557 { 558 AHCIDevice *d = &s->dev[port]; 559 AHCIPortRegs *pr = &d->port_regs; 560 IDEState *ide_state = &d->port.ifs[0]; 561 int i; 562 563 DPRINTF(port, "reset port\n"); 564 565 ide_bus_reset(&d->port); 566 ide_state->ncq_queues = AHCI_MAX_CMDS; 567 568 pr->scr_stat = 0; 569 pr->scr_err = 0; 570 pr->scr_act = 0; 571 pr->tfdata = 0x7F; 572 pr->sig = 0xFFFFFFFF; 573 d->busy_slot = -1; 574 d->init_d2h_sent = false; 575 576 ide_state = &s->dev[port].port.ifs[0]; 577 if (!ide_state->blk) { 578 return; 579 } 580 581 /* reset ncq queue */ 582 for (i = 0; i < AHCI_MAX_CMDS; i++) { 583 NCQTransferState *ncq_tfs = &s->dev[port].ncq_tfs[i]; 584 if (!ncq_tfs->used) { 585 continue; 586 } 587 588 if (ncq_tfs->aiocb) { 589 blk_aio_cancel(ncq_tfs->aiocb); 590 ncq_tfs->aiocb = NULL; 591 } 592 593 /* Maybe we just finished the request thanks to blk_aio_cancel() */ 594 if (!ncq_tfs->used) { 595 continue; 596 } 597 598 qemu_sglist_destroy(&ncq_tfs->sglist); 599 ncq_tfs->used = 0; 600 } 601 602 s->dev[port].port_state = STATE_RUN; 603 if (!ide_state->blk) { 604 pr->sig = 0; 605 ide_state->status = SEEK_STAT | WRERR_STAT; 606 } else if (ide_state->drive_kind == IDE_CD) { 607 pr->sig = SATA_SIGNATURE_CDROM; 608 ide_state->lcyl = 0x14; 609 ide_state->hcyl = 0xeb; 610 DPRINTF(port, "set lcyl = %d\n", ide_state->lcyl); 611 ide_state->status = SEEK_STAT | WRERR_STAT | READY_STAT; 612 } else { 613 pr->sig = SATA_SIGNATURE_DISK; 614 ide_state->status = SEEK_STAT | WRERR_STAT; 615 } 616 617 ide_state->error = 1; 618 ahci_init_d2h(d); 619 } 620 621 static void debug_print_fis(uint8_t *fis, int cmd_len) 622 { 623 #if DEBUG_AHCI 624 int i; 625 626 fprintf(stderr, "fis:"); 627 for (i = 0; i < cmd_len; i++) { 628 if ((i & 0xf) == 0) { 629 fprintf(stderr, "\n%02x:",i); 630 } 631 fprintf(stderr, "%02x ",fis[i]); 632 } 633 fprintf(stderr, "\n"); 634 #endif 635 } 636 637 static bool ahci_map_fis_address(AHCIDevice *ad) 638 { 639 AHCIPortRegs *pr = &ad->port_regs; 640 map_page(ad->hba->as, &ad->res_fis, 641 ((uint64_t)pr->fis_addr_hi << 32) | pr->fis_addr, 256); 642 return ad->res_fis != NULL; 643 } 644 645 static void ahci_unmap_fis_address(AHCIDevice *ad) 646 { 647 dma_memory_unmap(ad->hba->as, ad->res_fis, 256, 648 DMA_DIRECTION_FROM_DEVICE, 256); 649 ad->res_fis = NULL; 650 } 651 652 static bool ahci_map_clb_address(AHCIDevice *ad) 653 { 654 AHCIPortRegs *pr = &ad->port_regs; 655 ad->cur_cmd = NULL; 656 map_page(ad->hba->as, &ad->lst, 657 ((uint64_t)pr->lst_addr_hi << 32) | pr->lst_addr, 1024); 658 return ad->lst != NULL; 659 } 660 661 static void ahci_unmap_clb_address(AHCIDevice *ad) 662 { 663 dma_memory_unmap(ad->hba->as, ad->lst, 1024, 664 DMA_DIRECTION_FROM_DEVICE, 1024); 665 ad->lst = NULL; 666 } 667 668 static void ahci_write_fis_sdb(AHCIState *s, int port, uint32_t finished) 669 { 670 AHCIDevice *ad = &s->dev[port]; 671 AHCIPortRegs *pr = &ad->port_regs; 672 IDEState *ide_state; 673 SDBFIS *sdb_fis; 674 675 if (!s->dev[port].res_fis || 676 !(pr->cmd & PORT_CMD_FIS_RX)) { 677 return; 678 } 679 680 sdb_fis = (SDBFIS *)&ad->res_fis[RES_FIS_SDBFIS]; 681 ide_state = &ad->port.ifs[0]; 682 683 sdb_fis->type = SATA_FIS_TYPE_SDB; 684 /* Interrupt pending & Notification bit */ 685 sdb_fis->flags = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0); 686 sdb_fis->status = ide_state->status & 0x77; 687 sdb_fis->error = ide_state->error; 688 /* update SAct field in SDB_FIS */ 689 s->dev[port].finished |= finished; 690 sdb_fis->payload = cpu_to_le32(ad->finished); 691 692 /* Update shadow registers (except BSY 0x80 and DRQ 0x08) */ 693 pr->tfdata = (ad->port.ifs[0].error << 8) | 694 (ad->port.ifs[0].status & 0x77) | 695 (pr->tfdata & 0x88); 696 697 ahci_trigger_irq(s, ad, PORT_IRQ_SDB_FIS); 698 } 699 700 static void ahci_write_fis_pio(AHCIDevice *ad, uint16_t len) 701 { 702 AHCIPortRegs *pr = &ad->port_regs; 703 uint8_t *pio_fis, *cmd_fis; 704 uint64_t tbl_addr; 705 dma_addr_t cmd_len = 0x80; 706 IDEState *s = &ad->port.ifs[0]; 707 708 if (!ad->res_fis || !(pr->cmd & PORT_CMD_FIS_RX)) { 709 return; 710 } 711 712 /* map cmd_fis */ 713 tbl_addr = le64_to_cpu(ad->cur_cmd->tbl_addr); 714 cmd_fis = dma_memory_map(ad->hba->as, tbl_addr, &cmd_len, 715 DMA_DIRECTION_TO_DEVICE); 716 717 if (cmd_fis == NULL) { 718 DPRINTF(ad->port_no, "dma_memory_map failed in ahci_write_fis_pio"); 719 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_HBUS_ERR); 720 return; 721 } 722 723 if (cmd_len != 0x80) { 724 DPRINTF(ad->port_no, 725 "dma_memory_map mapped too few bytes in ahci_write_fis_pio"); 726 dma_memory_unmap(ad->hba->as, cmd_fis, cmd_len, 727 DMA_DIRECTION_TO_DEVICE, cmd_len); 728 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_HBUS_ERR); 729 return; 730 } 731 732 pio_fis = &ad->res_fis[RES_FIS_PSFIS]; 733 734 pio_fis[0] = SATA_FIS_TYPE_PIO_SETUP; 735 pio_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0); 736 pio_fis[2] = s->status; 737 pio_fis[3] = s->error; 738 739 pio_fis[4] = s->sector; 740 pio_fis[5] = s->lcyl; 741 pio_fis[6] = s->hcyl; 742 pio_fis[7] = s->select; 743 pio_fis[8] = s->hob_sector; 744 pio_fis[9] = s->hob_lcyl; 745 pio_fis[10] = s->hob_hcyl; 746 pio_fis[11] = 0; 747 pio_fis[12] = cmd_fis[12]; 748 pio_fis[13] = cmd_fis[13]; 749 pio_fis[14] = 0; 750 pio_fis[15] = s->status; 751 pio_fis[16] = len & 255; 752 pio_fis[17] = len >> 8; 753 pio_fis[18] = 0; 754 pio_fis[19] = 0; 755 756 /* Update shadow registers: */ 757 pr->tfdata = (ad->port.ifs[0].error << 8) | 758 ad->port.ifs[0].status; 759 760 if (pio_fis[2] & ERR_STAT) { 761 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_TF_ERR); 762 } 763 764 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_PIOS_FIS); 765 766 dma_memory_unmap(ad->hba->as, cmd_fis, cmd_len, 767 DMA_DIRECTION_TO_DEVICE, cmd_len); 768 } 769 770 static void ahci_write_fis_d2h(AHCIDevice *ad, uint8_t *cmd_fis) 771 { 772 AHCIPortRegs *pr = &ad->port_regs; 773 uint8_t *d2h_fis; 774 int i; 775 dma_addr_t cmd_len = 0x80; 776 int cmd_mapped = 0; 777 IDEState *s = &ad->port.ifs[0]; 778 779 if (!ad->res_fis || !(pr->cmd & PORT_CMD_FIS_RX)) { 780 return; 781 } 782 783 if (!cmd_fis) { 784 /* map cmd_fis */ 785 uint64_t tbl_addr = le64_to_cpu(ad->cur_cmd->tbl_addr); 786 cmd_fis = dma_memory_map(ad->hba->as, tbl_addr, &cmd_len, 787 DMA_DIRECTION_TO_DEVICE); 788 cmd_mapped = 1; 789 } 790 791 d2h_fis = &ad->res_fis[RES_FIS_RFIS]; 792 793 d2h_fis[0] = SATA_FIS_TYPE_REGISTER_D2H; 794 d2h_fis[1] = (ad->hba->control_regs.irqstatus ? (1 << 6) : 0); 795 d2h_fis[2] = s->status; 796 d2h_fis[3] = s->error; 797 798 d2h_fis[4] = s->sector; 799 d2h_fis[5] = s->lcyl; 800 d2h_fis[6] = s->hcyl; 801 d2h_fis[7] = s->select; 802 d2h_fis[8] = s->hob_sector; 803 d2h_fis[9] = s->hob_lcyl; 804 d2h_fis[10] = s->hob_hcyl; 805 d2h_fis[11] = 0; 806 d2h_fis[12] = cmd_fis[12]; 807 d2h_fis[13] = cmd_fis[13]; 808 for (i = 14; i < 20; i++) { 809 d2h_fis[i] = 0; 810 } 811 812 /* Update shadow registers: */ 813 pr->tfdata = (ad->port.ifs[0].error << 8) | 814 ad->port.ifs[0].status; 815 816 if (d2h_fis[2] & ERR_STAT) { 817 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_TF_ERR); 818 } 819 820 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_D2H_REG_FIS); 821 822 if (cmd_mapped) { 823 dma_memory_unmap(ad->hba->as, cmd_fis, cmd_len, 824 DMA_DIRECTION_TO_DEVICE, cmd_len); 825 } 826 } 827 828 static int prdt_tbl_entry_size(const AHCI_SG *tbl) 829 { 830 /* flags_size is zero-based */ 831 return (le32_to_cpu(tbl->flags_size) & AHCI_PRDT_SIZE_MASK) + 1; 832 } 833 834 static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist, 835 int64_t limit, int32_t offset) 836 { 837 AHCICmdHdr *cmd = ad->cur_cmd; 838 uint16_t opts = le16_to_cpu(cmd->opts); 839 uint16_t prdtl = le16_to_cpu(cmd->prdtl); 840 uint64_t cfis_addr = le64_to_cpu(cmd->tbl_addr); 841 uint64_t prdt_addr = cfis_addr + 0x80; 842 dma_addr_t prdt_len = (prdtl * sizeof(AHCI_SG)); 843 dma_addr_t real_prdt_len = prdt_len; 844 uint8_t *prdt; 845 int i; 846 int r = 0; 847 uint64_t sum = 0; 848 int off_idx = -1; 849 int64_t off_pos = -1; 850 int tbl_entry_size; 851 IDEBus *bus = &ad->port; 852 BusState *qbus = BUS(bus); 853 854 /* 855 * Note: AHCI PRDT can describe up to 256GiB. SATA/ATA only support 856 * transactions of up to 32MiB as of ATA8-ACS3 rev 1b, assuming a 857 * 512 byte sector size. We limit the PRDT in this implementation to 858 * a reasonably large 2GiB, which can accommodate the maximum transfer 859 * request for sector sizes up to 32K. 860 */ 861 862 if (!prdtl) { 863 DPRINTF(ad->port_no, "no sg list given by guest: 0x%08x\n", opts); 864 return -1; 865 } 866 867 /* map PRDT */ 868 if (!(prdt = dma_memory_map(ad->hba->as, prdt_addr, &prdt_len, 869 DMA_DIRECTION_TO_DEVICE))){ 870 DPRINTF(ad->port_no, "map failed\n"); 871 return -1; 872 } 873 874 if (prdt_len < real_prdt_len) { 875 DPRINTF(ad->port_no, "mapped less than expected\n"); 876 r = -1; 877 goto out; 878 } 879 880 /* Get entries in the PRDT, init a qemu sglist accordingly */ 881 if (prdtl > 0) { 882 AHCI_SG *tbl = (AHCI_SG *)prdt; 883 sum = 0; 884 for (i = 0; i < prdtl; i++) { 885 tbl_entry_size = prdt_tbl_entry_size(&tbl[i]); 886 if (offset < (sum + tbl_entry_size)) { 887 off_idx = i; 888 off_pos = offset - sum; 889 break; 890 } 891 sum += tbl_entry_size; 892 } 893 if ((off_idx == -1) || (off_pos < 0) || (off_pos > tbl_entry_size)) { 894 DPRINTF(ad->port_no, "%s: Incorrect offset! " 895 "off_idx: %d, off_pos: %"PRId64"\n", 896 __func__, off_idx, off_pos); 897 r = -1; 898 goto out; 899 } 900 901 qemu_sglist_init(sglist, qbus->parent, (prdtl - off_idx), 902 ad->hba->as); 903 qemu_sglist_add(sglist, le64_to_cpu(tbl[off_idx].addr) + off_pos, 904 MIN(prdt_tbl_entry_size(&tbl[off_idx]) - off_pos, 905 limit)); 906 907 for (i = off_idx + 1; i < prdtl && sglist->size < limit; i++) { 908 qemu_sglist_add(sglist, le64_to_cpu(tbl[i].addr), 909 MIN(prdt_tbl_entry_size(&tbl[i]), 910 limit - sglist->size)); 911 if (sglist->size > INT32_MAX) { 912 error_report("AHCI Physical Region Descriptor Table describes " 913 "more than 2 GiB.\n"); 914 qemu_sglist_destroy(sglist); 915 r = -1; 916 goto out; 917 } 918 } 919 } 920 921 out: 922 dma_memory_unmap(ad->hba->as, prdt, prdt_len, 923 DMA_DIRECTION_TO_DEVICE, prdt_len); 924 return r; 925 } 926 927 static void ncq_err(NCQTransferState *ncq_tfs) 928 { 929 IDEState *ide_state = &ncq_tfs->drive->port.ifs[0]; 930 931 ide_state->error = ABRT_ERR; 932 ide_state->status = READY_STAT | ERR_STAT; 933 ncq_tfs->drive->port_regs.scr_err |= (1 << ncq_tfs->tag); 934 } 935 936 static void ncq_cb(void *opaque, int ret) 937 { 938 NCQTransferState *ncq_tfs = (NCQTransferState *)opaque; 939 IDEState *ide_state = &ncq_tfs->drive->port.ifs[0]; 940 941 if (ret == -ECANCELED) { 942 return; 943 } 944 /* Clear bit for this tag in SActive */ 945 ncq_tfs->drive->port_regs.scr_act &= ~(1 << ncq_tfs->tag); 946 947 if (ret < 0) { 948 ncq_err(ncq_tfs); 949 } else { 950 ide_state->status = READY_STAT | SEEK_STAT; 951 } 952 953 ahci_write_fis_sdb(ncq_tfs->drive->hba, ncq_tfs->drive->port_no, 954 (1 << ncq_tfs->tag)); 955 956 DPRINTF(ncq_tfs->drive->port_no, "NCQ transfer tag %d finished\n", 957 ncq_tfs->tag); 958 959 block_acct_done(blk_get_stats(ncq_tfs->drive->port.ifs[0].blk), 960 &ncq_tfs->acct); 961 qemu_sglist_destroy(&ncq_tfs->sglist); 962 ncq_tfs->used = 0; 963 } 964 965 static int is_ncq(uint8_t ata_cmd) 966 { 967 /* Based on SATA 3.2 section 13.6.3.2 */ 968 switch (ata_cmd) { 969 case READ_FPDMA_QUEUED: 970 case WRITE_FPDMA_QUEUED: 971 case NCQ_NON_DATA: 972 case RECEIVE_FPDMA_QUEUED: 973 case SEND_FPDMA_QUEUED: 974 return 1; 975 default: 976 return 0; 977 } 978 } 979 980 static void process_ncq_command(AHCIState *s, int port, uint8_t *cmd_fis, 981 int slot) 982 { 983 AHCIDevice *ad = &s->dev[port]; 984 IDEState *ide_state = &ad->port.ifs[0]; 985 NCQFrame *ncq_fis = (NCQFrame*)cmd_fis; 986 uint8_t tag = ncq_fis->tag >> 3; 987 NCQTransferState *ncq_tfs = &ad->ncq_tfs[tag]; 988 size_t size; 989 990 g_assert(is_ncq(ncq_fis->command)); 991 if (ncq_tfs->used) { 992 /* error - already in use */ 993 fprintf(stderr, "%s: tag %d already used\n", __FUNCTION__, tag); 994 return; 995 } 996 997 ncq_tfs->used = 1; 998 ncq_tfs->drive = ad; 999 ncq_tfs->slot = slot; 1000 ncq_tfs->cmd = ncq_fis->command; 1001 ncq_tfs->lba = ((uint64_t)ncq_fis->lba5 << 40) | 1002 ((uint64_t)ncq_fis->lba4 << 32) | 1003 ((uint64_t)ncq_fis->lba3 << 24) | 1004 ((uint64_t)ncq_fis->lba2 << 16) | 1005 ((uint64_t)ncq_fis->lba1 << 8) | 1006 (uint64_t)ncq_fis->lba0; 1007 ncq_tfs->tag = tag; 1008 1009 /* Sanity-check the NCQ packet */ 1010 if (tag != slot) { 1011 DPRINTF(port, "Warn: NCQ slot (%d) did not match the given tag (%d)\n", 1012 slot, tag); 1013 } 1014 1015 if (ncq_fis->aux0 || ncq_fis->aux1 || ncq_fis->aux2 || ncq_fis->aux3) { 1016 DPRINTF(port, "Warn: Attempt to use NCQ auxiliary fields.\n"); 1017 } 1018 if (ncq_fis->prio || ncq_fis->icc) { 1019 DPRINTF(port, "Warn: Unsupported attempt to use PRIO/ICC fields\n"); 1020 } 1021 if (ncq_fis->fua & NCQ_FIS_FUA_MASK) { 1022 DPRINTF(port, "Warn: Unsupported attempt to use Force Unit Access\n"); 1023 } 1024 if (ncq_fis->tag & NCQ_FIS_RARC_MASK) { 1025 DPRINTF(port, "Warn: Unsupported attempt to use Rebuild Assist\n"); 1026 } 1027 1028 ncq_tfs->sector_count = ((uint16_t)ncq_fis->sector_count_high << 8) | 1029 ncq_fis->sector_count_low; 1030 size = ncq_tfs->sector_count * 512; 1031 ahci_populate_sglist(ad, &ncq_tfs->sglist, size, 0); 1032 1033 if (ncq_tfs->sglist.size < size) { 1034 error_report("ahci: PRDT length for NCQ command (0x%zx) " 1035 "is smaller than the requested size (0x%zx)", 1036 ncq_tfs->sglist.size, size); 1037 qemu_sglist_destroy(&ncq_tfs->sglist); 1038 ncq_err(ncq_tfs); 1039 ahci_trigger_irq(ad->hba, ad, PORT_IRQ_OVERFLOW); 1040 return; 1041 } else if (ncq_tfs->sglist.size != size) { 1042 DPRINTF(port, "Warn: PRDTL (0x%zx)" 1043 " does not match requested size (0x%zx)", 1044 ncq_tfs->sglist.size, size); 1045 } 1046 1047 DPRINTF(port, "NCQ transfer LBA from %"PRId64" to %"PRId64", " 1048 "drive max %"PRId64"\n", 1049 ncq_tfs->lba, ncq_tfs->lba + ncq_tfs->sector_count - 1, 1050 ide_state->nb_sectors - 1); 1051 1052 switch (ncq_tfs->cmd) { 1053 case READ_FPDMA_QUEUED: 1054 DPRINTF(port, "NCQ reading %d sectors from LBA %"PRId64", tag %d\n", 1055 ncq_tfs->sector_count, ncq_tfs->lba, ncq_tfs->tag); 1056 1057 DPRINTF(port, "tag %d aio read %"PRId64"\n", 1058 ncq_tfs->tag, ncq_tfs->lba); 1059 1060 dma_acct_start(ide_state->blk, &ncq_tfs->acct, 1061 &ncq_tfs->sglist, BLOCK_ACCT_READ); 1062 ncq_tfs->aiocb = dma_blk_read(ide_state->blk, &ncq_tfs->sglist, 1063 ncq_tfs->lba, ncq_cb, ncq_tfs); 1064 break; 1065 case WRITE_FPDMA_QUEUED: 1066 DPRINTF(port, "NCQ writing %d sectors to LBA %"PRId64", tag %d\n", 1067 ncq_tfs->sector_count, ncq_tfs->lba, ncq_tfs->tag); 1068 1069 DPRINTF(port, "tag %d aio write %"PRId64"\n", 1070 ncq_tfs->tag, ncq_tfs->lba); 1071 1072 dma_acct_start(ide_state->blk, &ncq_tfs->acct, 1073 &ncq_tfs->sglist, BLOCK_ACCT_WRITE); 1074 ncq_tfs->aiocb = dma_blk_write(ide_state->blk, &ncq_tfs->sglist, 1075 ncq_tfs->lba, ncq_cb, ncq_tfs); 1076 break; 1077 default: 1078 DPRINTF(port, "error: unsupported NCQ command (0x%02x) received\n", 1079 ncq_tfs->cmd); 1080 qemu_sglist_destroy(&ncq_tfs->sglist); 1081 ncq_err(ncq_tfs); 1082 } 1083 } 1084 1085 static void handle_reg_h2d_fis(AHCIState *s, int port, 1086 int slot, uint8_t *cmd_fis) 1087 { 1088 IDEState *ide_state = &s->dev[port].port.ifs[0]; 1089 AHCICmdHdr *cmd = s->dev[port].cur_cmd; 1090 uint16_t opts = le16_to_cpu(cmd->opts); 1091 1092 if (cmd_fis[1] & 0x0F) { 1093 DPRINTF(port, "Port Multiplier not supported." 1094 " cmd_fis[0]=%02x cmd_fis[1]=%02x cmd_fis[2]=%02x\n", 1095 cmd_fis[0], cmd_fis[1], cmd_fis[2]); 1096 return; 1097 } 1098 1099 if (cmd_fis[1] & 0x70) { 1100 DPRINTF(port, "Reserved flags set in H2D Register FIS." 1101 " cmd_fis[0]=%02x cmd_fis[1]=%02x cmd_fis[2]=%02x\n", 1102 cmd_fis[0], cmd_fis[1], cmd_fis[2]); 1103 return; 1104 } 1105 1106 if (!(cmd_fis[1] & SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER)) { 1107 switch (s->dev[port].port_state) { 1108 case STATE_RUN: 1109 if (cmd_fis[15] & ATA_SRST) { 1110 s->dev[port].port_state = STATE_RESET; 1111 } 1112 break; 1113 case STATE_RESET: 1114 if (!(cmd_fis[15] & ATA_SRST)) { 1115 ahci_reset_port(s, port); 1116 } 1117 break; 1118 } 1119 return; 1120 } 1121 1122 /* Check for NCQ command */ 1123 if (is_ncq(cmd_fis[2])) { 1124 process_ncq_command(s, port, cmd_fis, slot); 1125 return; 1126 } 1127 1128 /* Decompose the FIS: 1129 * AHCI does not interpret FIS packets, it only forwards them. 1130 * SATA 1.0 describes how to decode LBA28 and CHS FIS packets. 1131 * Later specifications, e.g, SATA 3.2, describe LBA48 FIS packets. 1132 * 1133 * ATA4 describes sector number for LBA28/CHS commands. 1134 * ATA6 describes sector number for LBA48 commands. 1135 * ATA8 deprecates CHS fully, describing only LBA28/48. 1136 * 1137 * We dutifully convert the FIS into IDE registers, and allow the 1138 * core layer to interpret them as needed. */ 1139 ide_state->feature = cmd_fis[3]; 1140 ide_state->sector = cmd_fis[4]; /* LBA 7:0 */ 1141 ide_state->lcyl = cmd_fis[5]; /* LBA 15:8 */ 1142 ide_state->hcyl = cmd_fis[6]; /* LBA 23:16 */ 1143 ide_state->select = cmd_fis[7]; /* LBA 27:24 (LBA28) */ 1144 ide_state->hob_sector = cmd_fis[8]; /* LBA 31:24 */ 1145 ide_state->hob_lcyl = cmd_fis[9]; /* LBA 39:32 */ 1146 ide_state->hob_hcyl = cmd_fis[10]; /* LBA 47:40 */ 1147 ide_state->hob_feature = cmd_fis[11]; 1148 ide_state->nsector = (int64_t)((cmd_fis[13] << 8) | cmd_fis[12]); 1149 /* 14, 16, 17, 18, 19: Reserved (SATA 1.0) */ 1150 /* 15: Only valid when UPDATE_COMMAND not set. */ 1151 1152 /* Copy the ACMD field (ATAPI packet, if any) from the AHCI command 1153 * table to ide_state->io_buffer */ 1154 if (opts & AHCI_CMD_ATAPI) { 1155 memcpy(ide_state->io_buffer, &cmd_fis[AHCI_COMMAND_TABLE_ACMD], 0x10); 1156 debug_print_fis(ide_state->io_buffer, 0x10); 1157 s->dev[port].done_atapi_packet = false; 1158 /* XXX send PIO setup FIS */ 1159 } 1160 1161 ide_state->error = 0; 1162 1163 /* Reset transferred byte counter */ 1164 cmd->status = 0; 1165 1166 /* We're ready to process the command in FIS byte 2. */ 1167 ide_exec_cmd(&s->dev[port].port, cmd_fis[2]); 1168 } 1169 1170 static int handle_cmd(AHCIState *s, int port, int slot) 1171 { 1172 IDEState *ide_state; 1173 uint64_t tbl_addr; 1174 AHCICmdHdr *cmd; 1175 uint8_t *cmd_fis; 1176 dma_addr_t cmd_len; 1177 1178 if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) { 1179 /* Engine currently busy, try again later */ 1180 DPRINTF(port, "engine busy\n"); 1181 return -1; 1182 } 1183 1184 if (!s->dev[port].lst) { 1185 DPRINTF(port, "error: lst not given but cmd handled"); 1186 return -1; 1187 } 1188 cmd = &((AHCICmdHdr *)s->dev[port].lst)[slot]; 1189 /* remember current slot handle for later */ 1190 s->dev[port].cur_cmd = cmd; 1191 1192 /* The device we are working for */ 1193 ide_state = &s->dev[port].port.ifs[0]; 1194 if (!ide_state->blk) { 1195 DPRINTF(port, "error: guest accessed unused port"); 1196 return -1; 1197 } 1198 1199 tbl_addr = le64_to_cpu(cmd->tbl_addr); 1200 cmd_len = 0x80; 1201 cmd_fis = dma_memory_map(s->as, tbl_addr, &cmd_len, 1202 DMA_DIRECTION_FROM_DEVICE); 1203 if (!cmd_fis) { 1204 DPRINTF(port, "error: guest passed us an invalid cmd fis\n"); 1205 return -1; 1206 } else if (cmd_len != 0x80) { 1207 ahci_trigger_irq(s, &s->dev[port], PORT_IRQ_HBUS_ERR); 1208 DPRINTF(port, "error: dma_memory_map failed: " 1209 "(len(%02"PRIx64") != 0x80)\n", 1210 cmd_len); 1211 goto out; 1212 } 1213 debug_print_fis(cmd_fis, 0x80); 1214 1215 switch (cmd_fis[0]) { 1216 case SATA_FIS_TYPE_REGISTER_H2D: 1217 handle_reg_h2d_fis(s, port, slot, cmd_fis); 1218 break; 1219 default: 1220 DPRINTF(port, "unknown command cmd_fis[0]=%02x cmd_fis[1]=%02x " 1221 "cmd_fis[2]=%02x\n", cmd_fis[0], cmd_fis[1], 1222 cmd_fis[2]); 1223 break; 1224 } 1225 1226 out: 1227 dma_memory_unmap(s->as, cmd_fis, cmd_len, DMA_DIRECTION_FROM_DEVICE, 1228 cmd_len); 1229 1230 if (s->dev[port].port.ifs[0].status & (BUSY_STAT|DRQ_STAT)) { 1231 /* async command, complete later */ 1232 s->dev[port].busy_slot = slot; 1233 return -1; 1234 } 1235 1236 /* done handling the command */ 1237 return 0; 1238 } 1239 1240 /* DMA dev <-> ram */ 1241 static void ahci_start_transfer(IDEDMA *dma) 1242 { 1243 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); 1244 IDEState *s = &ad->port.ifs[0]; 1245 uint32_t size = (uint32_t)(s->data_end - s->data_ptr); 1246 /* write == ram -> device */ 1247 uint16_t opts = le16_to_cpu(ad->cur_cmd->opts); 1248 int is_write = opts & AHCI_CMD_WRITE; 1249 int is_atapi = opts & AHCI_CMD_ATAPI; 1250 int has_sglist = 0; 1251 1252 if (is_atapi && !ad->done_atapi_packet) { 1253 /* already prepopulated iobuffer */ 1254 ad->done_atapi_packet = true; 1255 size = 0; 1256 goto out; 1257 } 1258 1259 if (ahci_dma_prepare_buf(dma, size)) { 1260 has_sglist = 1; 1261 } 1262 1263 DPRINTF(ad->port_no, "%sing %d bytes on %s w/%s sglist\n", 1264 is_write ? "writ" : "read", size, is_atapi ? "atapi" : "ata", 1265 has_sglist ? "" : "o"); 1266 1267 if (has_sglist && size) { 1268 if (is_write) { 1269 dma_buf_write(s->data_ptr, size, &s->sg); 1270 } else { 1271 dma_buf_read(s->data_ptr, size, &s->sg); 1272 } 1273 } 1274 1275 out: 1276 /* declare that we processed everything */ 1277 s->data_ptr = s->data_end; 1278 1279 /* Update number of transferred bytes, destroy sglist */ 1280 ahci_commit_buf(dma, size); 1281 1282 s->end_transfer_func(s); 1283 1284 if (!(s->status & DRQ_STAT)) { 1285 /* done with PIO send/receive */ 1286 ahci_write_fis_pio(ad, le32_to_cpu(ad->cur_cmd->status)); 1287 } 1288 } 1289 1290 static void ahci_start_dma(IDEDMA *dma, IDEState *s, 1291 BlockCompletionFunc *dma_cb) 1292 { 1293 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); 1294 DPRINTF(ad->port_no, "\n"); 1295 s->io_buffer_offset = 0; 1296 dma_cb(s, 0); 1297 } 1298 1299 static void ahci_restart_dma(IDEDMA *dma) 1300 { 1301 /* Nothing to do, ahci_start_dma already resets s->io_buffer_offset. */ 1302 } 1303 1304 /** 1305 * Called in DMA R/W chains to read the PRDT, utilizing ahci_populate_sglist. 1306 * Not currently invoked by PIO R/W chains, 1307 * which invoke ahci_populate_sglist via ahci_start_transfer. 1308 */ 1309 static int32_t ahci_dma_prepare_buf(IDEDMA *dma, int32_t limit) 1310 { 1311 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); 1312 IDEState *s = &ad->port.ifs[0]; 1313 1314 if (ahci_populate_sglist(ad, &s->sg, limit, s->io_buffer_offset) == -1) { 1315 DPRINTF(ad->port_no, "ahci_dma_prepare_buf failed.\n"); 1316 return -1; 1317 } 1318 s->io_buffer_size = s->sg.size; 1319 1320 DPRINTF(ad->port_no, "len=%#x\n", s->io_buffer_size); 1321 return s->io_buffer_size; 1322 } 1323 1324 /** 1325 * Destroys the scatter-gather list, 1326 * and updates the command header with a bytes-read value. 1327 * called explicitly via ahci_dma_rw_buf (ATAPI DMA), 1328 * and ahci_start_transfer (PIO R/W), 1329 * and called via callback from ide_dma_cb for DMA R/W paths. 1330 */ 1331 static void ahci_commit_buf(IDEDMA *dma, uint32_t tx_bytes) 1332 { 1333 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); 1334 IDEState *s = &ad->port.ifs[0]; 1335 1336 tx_bytes += le32_to_cpu(ad->cur_cmd->status); 1337 ad->cur_cmd->status = cpu_to_le32(tx_bytes); 1338 1339 qemu_sglist_destroy(&s->sg); 1340 } 1341 1342 static int ahci_dma_rw_buf(IDEDMA *dma, int is_write) 1343 { 1344 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); 1345 IDEState *s = &ad->port.ifs[0]; 1346 uint8_t *p = s->io_buffer + s->io_buffer_index; 1347 int l = s->io_buffer_size - s->io_buffer_index; 1348 1349 if (ahci_populate_sglist(ad, &s->sg, l, s->io_buffer_offset)) { 1350 return 0; 1351 } 1352 1353 if (is_write) { 1354 dma_buf_read(p, l, &s->sg); 1355 } else { 1356 dma_buf_write(p, l, &s->sg); 1357 } 1358 1359 /* free sglist, update byte count */ 1360 ahci_commit_buf(dma, l); 1361 1362 s->io_buffer_index += l; 1363 s->io_buffer_offset += l; 1364 1365 DPRINTF(ad->port_no, "len=%#x\n", l); 1366 1367 return 1; 1368 } 1369 1370 static void ahci_cmd_done(IDEDMA *dma) 1371 { 1372 AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma); 1373 1374 DPRINTF(ad->port_no, "cmd done\n"); 1375 1376 /* update d2h status */ 1377 ahci_write_fis_d2h(ad, NULL); 1378 1379 if (!ad->check_bh) { 1380 /* maybe we still have something to process, check later */ 1381 ad->check_bh = qemu_bh_new(ahci_check_cmd_bh, ad); 1382 qemu_bh_schedule(ad->check_bh); 1383 } 1384 } 1385 1386 static void ahci_irq_set(void *opaque, int n, int level) 1387 { 1388 } 1389 1390 static const IDEDMAOps ahci_dma_ops = { 1391 .start_dma = ahci_start_dma, 1392 .restart_dma = ahci_restart_dma, 1393 .start_transfer = ahci_start_transfer, 1394 .prepare_buf = ahci_dma_prepare_buf, 1395 .commit_buf = ahci_commit_buf, 1396 .rw_buf = ahci_dma_rw_buf, 1397 .cmd_done = ahci_cmd_done, 1398 }; 1399 1400 void ahci_init(AHCIState *s, DeviceState *qdev, AddressSpace *as, int ports) 1401 { 1402 qemu_irq *irqs; 1403 int i; 1404 1405 s->as = as; 1406 s->ports = ports; 1407 s->dev = g_new0(AHCIDevice, ports); 1408 ahci_reg_init(s); 1409 /* XXX BAR size should be 1k, but that breaks, so bump it to 4k for now */ 1410 memory_region_init_io(&s->mem, OBJECT(qdev), &ahci_mem_ops, s, 1411 "ahci", AHCI_MEM_BAR_SIZE); 1412 memory_region_init_io(&s->idp, OBJECT(qdev), &ahci_idp_ops, s, 1413 "ahci-idp", 32); 1414 1415 irqs = qemu_allocate_irqs(ahci_irq_set, s, s->ports); 1416 1417 for (i = 0; i < s->ports; i++) { 1418 AHCIDevice *ad = &s->dev[i]; 1419 1420 ide_bus_new(&ad->port, sizeof(ad->port), qdev, i, 1); 1421 ide_init2(&ad->port, irqs[i]); 1422 1423 ad->hba = s; 1424 ad->port_no = i; 1425 ad->port.dma = &ad->dma; 1426 ad->port.dma->ops = &ahci_dma_ops; 1427 ide_register_restart_cb(&ad->port); 1428 } 1429 } 1430 1431 void ahci_uninit(AHCIState *s) 1432 { 1433 g_free(s->dev); 1434 } 1435 1436 void ahci_reset(AHCIState *s) 1437 { 1438 AHCIPortRegs *pr; 1439 int i; 1440 1441 s->control_regs.irqstatus = 0; 1442 /* AHCI Enable (AE) 1443 * The implementation of this bit is dependent upon the value of the 1444 * CAP.SAM bit. If CAP.SAM is '0', then GHC.AE shall be read-write and 1445 * shall have a reset value of '0'. If CAP.SAM is '1', then AE shall be 1446 * read-only and shall have a reset value of '1'. 1447 * 1448 * We set HOST_CAP_AHCI so we must enable AHCI at reset. 1449 */ 1450 s->control_regs.ghc = HOST_CTL_AHCI_EN; 1451 1452 for (i = 0; i < s->ports; i++) { 1453 pr = &s->dev[i].port_regs; 1454 pr->irq_stat = 0; 1455 pr->irq_mask = 0; 1456 pr->scr_ctl = 0; 1457 pr->cmd = PORT_CMD_SPIN_UP | PORT_CMD_POWER_ON; 1458 ahci_reset_port(s, i); 1459 } 1460 } 1461 1462 static const VMStateDescription vmstate_ahci_device = { 1463 .name = "ahci port", 1464 .version_id = 1, 1465 .fields = (VMStateField[]) { 1466 VMSTATE_IDE_BUS(port, AHCIDevice), 1467 VMSTATE_IDE_DRIVE(port.ifs[0], AHCIDevice), 1468 VMSTATE_UINT32(port_state, AHCIDevice), 1469 VMSTATE_UINT32(finished, AHCIDevice), 1470 VMSTATE_UINT32(port_regs.lst_addr, AHCIDevice), 1471 VMSTATE_UINT32(port_regs.lst_addr_hi, AHCIDevice), 1472 VMSTATE_UINT32(port_regs.fis_addr, AHCIDevice), 1473 VMSTATE_UINT32(port_regs.fis_addr_hi, AHCIDevice), 1474 VMSTATE_UINT32(port_regs.irq_stat, AHCIDevice), 1475 VMSTATE_UINT32(port_regs.irq_mask, AHCIDevice), 1476 VMSTATE_UINT32(port_regs.cmd, AHCIDevice), 1477 VMSTATE_UINT32(port_regs.tfdata, AHCIDevice), 1478 VMSTATE_UINT32(port_regs.sig, AHCIDevice), 1479 VMSTATE_UINT32(port_regs.scr_stat, AHCIDevice), 1480 VMSTATE_UINT32(port_regs.scr_ctl, AHCIDevice), 1481 VMSTATE_UINT32(port_regs.scr_err, AHCIDevice), 1482 VMSTATE_UINT32(port_regs.scr_act, AHCIDevice), 1483 VMSTATE_UINT32(port_regs.cmd_issue, AHCIDevice), 1484 VMSTATE_BOOL(done_atapi_packet, AHCIDevice), 1485 VMSTATE_INT32(busy_slot, AHCIDevice), 1486 VMSTATE_BOOL(init_d2h_sent, AHCIDevice), 1487 VMSTATE_END_OF_LIST() 1488 }, 1489 }; 1490 1491 static int ahci_state_post_load(void *opaque, int version_id) 1492 { 1493 int i; 1494 struct AHCIDevice *ad; 1495 AHCIState *s = opaque; 1496 1497 for (i = 0; i < s->ports; i++) { 1498 ad = &s->dev[i]; 1499 1500 /* Only remap the CLB address if appropriate, disallowing a state 1501 * transition from 'on' to 'off' it should be consistent here. */ 1502 if (ahci_cond_start_engines(ad, false) != 0) { 1503 return -1; 1504 } 1505 1506 /* 1507 * If an error is present, ad->busy_slot will be valid and not -1. 1508 * In this case, an operation is waiting to resume and will re-check 1509 * for additional AHCI commands to execute upon completion. 1510 * 1511 * In the case where no error was present, busy_slot will be -1, 1512 * and we should check to see if there are additional commands waiting. 1513 */ 1514 if (ad->busy_slot == -1) { 1515 check_cmd(s, i); 1516 } else { 1517 /* We are in the middle of a command, and may need to access 1518 * the command header in guest memory again. */ 1519 if (ad->busy_slot < 0 || ad->busy_slot >= AHCI_MAX_CMDS) { 1520 return -1; 1521 } 1522 ad->cur_cmd = &((AHCICmdHdr *)ad->lst)[ad->busy_slot]; 1523 } 1524 } 1525 1526 return 0; 1527 } 1528 1529 const VMStateDescription vmstate_ahci = { 1530 .name = "ahci", 1531 .version_id = 1, 1532 .post_load = ahci_state_post_load, 1533 .fields = (VMStateField[]) { 1534 VMSTATE_STRUCT_VARRAY_POINTER_INT32(dev, AHCIState, ports, 1535 vmstate_ahci_device, AHCIDevice), 1536 VMSTATE_UINT32(control_regs.cap, AHCIState), 1537 VMSTATE_UINT32(control_regs.ghc, AHCIState), 1538 VMSTATE_UINT32(control_regs.irqstatus, AHCIState), 1539 VMSTATE_UINT32(control_regs.impl, AHCIState), 1540 VMSTATE_UINT32(control_regs.version, AHCIState), 1541 VMSTATE_UINT32(idp_index, AHCIState), 1542 VMSTATE_INT32_EQUAL(ports, AHCIState), 1543 VMSTATE_END_OF_LIST() 1544 }, 1545 }; 1546 1547 #define TYPE_SYSBUS_AHCI "sysbus-ahci" 1548 #define SYSBUS_AHCI(obj) OBJECT_CHECK(SysbusAHCIState, (obj), TYPE_SYSBUS_AHCI) 1549 1550 typedef struct SysbusAHCIState { 1551 /*< private >*/ 1552 SysBusDevice parent_obj; 1553 /*< public >*/ 1554 1555 AHCIState ahci; 1556 uint32_t num_ports; 1557 } SysbusAHCIState; 1558 1559 static const VMStateDescription vmstate_sysbus_ahci = { 1560 .name = "sysbus-ahci", 1561 .fields = (VMStateField[]) { 1562 VMSTATE_AHCI(ahci, SysbusAHCIState), 1563 VMSTATE_END_OF_LIST() 1564 }, 1565 }; 1566 1567 static void sysbus_ahci_reset(DeviceState *dev) 1568 { 1569 SysbusAHCIState *s = SYSBUS_AHCI(dev); 1570 1571 ahci_reset(&s->ahci); 1572 } 1573 1574 static void sysbus_ahci_realize(DeviceState *dev, Error **errp) 1575 { 1576 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 1577 SysbusAHCIState *s = SYSBUS_AHCI(dev); 1578 1579 ahci_init(&s->ahci, dev, &address_space_memory, s->num_ports); 1580 1581 sysbus_init_mmio(sbd, &s->ahci.mem); 1582 sysbus_init_irq(sbd, &s->ahci.irq); 1583 } 1584 1585 static Property sysbus_ahci_properties[] = { 1586 DEFINE_PROP_UINT32("num-ports", SysbusAHCIState, num_ports, 1), 1587 DEFINE_PROP_END_OF_LIST(), 1588 }; 1589 1590 static void sysbus_ahci_class_init(ObjectClass *klass, void *data) 1591 { 1592 DeviceClass *dc = DEVICE_CLASS(klass); 1593 1594 dc->realize = sysbus_ahci_realize; 1595 dc->vmsd = &vmstate_sysbus_ahci; 1596 dc->props = sysbus_ahci_properties; 1597 dc->reset = sysbus_ahci_reset; 1598 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 1599 } 1600 1601 static const TypeInfo sysbus_ahci_info = { 1602 .name = TYPE_SYSBUS_AHCI, 1603 .parent = TYPE_SYS_BUS_DEVICE, 1604 .instance_size = sizeof(SysbusAHCIState), 1605 .class_init = sysbus_ahci_class_init, 1606 }; 1607 1608 static void sysbus_ahci_register_types(void) 1609 { 1610 type_register_static(&sysbus_ahci_info); 1611 } 1612 1613 type_init(sysbus_ahci_register_types) 1614 1615 void ahci_ide_create_devs(PCIDevice *dev, DriveInfo **hd) 1616 { 1617 AHCIPCIState *d = ICH_AHCI(dev); 1618 AHCIState *ahci = &d->ahci; 1619 int i; 1620 1621 for (i = 0; i < ahci->ports; i++) { 1622 if (hd[i] == NULL) { 1623 continue; 1624 } 1625 ide_create_drive(&ahci->dev[i].port, 0, hd[i]); 1626 } 1627 1628 } 1629