tests/ide-test.c

   1 /*
   2  * IDE test cases
   3  *
   4  * Copyright (c) 2013 Kevin Wolf <kwolf@redhat.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu/osdep.h"
  26
  27
  28 #include "libqtest.h"
  29 #include "libqos/libqos.h"
  30 #include "libqos/pci-pc.h"
  31 #include "libqos/malloc-pc.h"
  32
  33 #include "qemu-common.h"
  34 #include "qemu/bswap.h"
  35 #include "hw/pci/pci_ids.h"
  36 #include "hw/pci/pci_regs.h"
  37
  38 #define TEST_IMAGE_SIZE 64 * 1024 * 1024
  39
  40 #define IDE_PCI_DEV     1
  41 #define IDE_PCI_FUNC    1
  42
  43 #define IDE_BASE 0x1f0
  44 #define IDE_PRIMARY_IRQ 14
  45
  46 #define ATAPI_BLOCK_SIZE 2048
  47
  48 /* How many bytes to receive via ATAPI PIO at one time.
  49  * Must be less than 0xFFFF. */
  50 #define BYTE_COUNT_LIMIT 5120
  51
  52 enum {
  53     reg_data        = 0x0,
  54     reg_feature     = 0x1,
  55     reg_nsectors    = 0x2,
  56     reg_lba_low     = 0x3,
  57     reg_lba_middle  = 0x4,
  58     reg_lba_high    = 0x5,
  59     reg_device      = 0x6,
  60     reg_status      = 0x7,
  61     reg_command     = 0x7,
  62 };
  63
  64 enum {
  65     BSY     = 0x80,
  66     DRDY    = 0x40,
  67     DF      = 0x20,
  68     DRQ     = 0x08,
  69     ERR     = 0x01,
  70 };
  71
  72 enum {
  73     DEV     = 0x10,
  74     LBA     = 0x40,
  75 };
  76
  77 enum {
  78     bmreg_cmd       = 0x0,
  79     bmreg_status    = 0x2,
  80     bmreg_prdt      = 0x4,
  81 };
  82
  83 enum {
  84     CMD_READ_DMA    = 0xc8,
  85     CMD_WRITE_DMA   = 0xca,
  86     CMD_FLUSH_CACHE = 0xe7,
  87     CMD_IDENTIFY    = 0xec,
  88     CMD_PACKET      = 0xa0,
  89
  90     CMDF_ABORT      = 0x100,
  91     CMDF_NO_BM      = 0x200,
  92 };
  93
  94 enum {
  95     BM_CMD_START    =  0x1,
  96     BM_CMD_WRITE    =  0x8, /* write = from device to memory */
  97 };
  98
  99 enum {
 100     BM_STS_ACTIVE   =  0x1,
 101     BM_STS_ERROR    =  0x2,
 102     BM_STS_INTR     =  0x4,
 103 };
 104
 105 enum {
 106     PRDT_EOT        = 0x80000000,
 107 };
 108
 109 #define assert_bit_set(data, mask) g_assert_cmphex((data) & (mask), ==, (mask))
 110 #define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
 111
 112 static QPCIBus *pcibus = NULL;
 113 static QGuestAllocator *guest_malloc;
 114
 115 static char tmp_path[] = "/tmp/qtest.XXXXXX";
 116 static char debug_path[] = "/tmp/qtest-blkdebug.XXXXXX";
 117
 118 static void ide_test_start(const char *cmdline_fmt, ...)
 119 {
 120     va_list ap;
 121     char *cmdline;
 122
 123     va_start(ap, cmdline_fmt);
 124     cmdline = g_strdup_vprintf(cmdline_fmt, ap);
 125     va_end(ap);
 126
 127     qtest_start(cmdline);
 128     guest_malloc = pc_alloc_init();
 129
 130     g_free(cmdline);
 131 }
 132
 133 static void ide_test_quit(void)
 134 {
 135     pc_alloc_uninit(guest_malloc);
 136     guest_malloc = NULL;
 137     qtest_end();
 138 }
 139
 140 static QPCIDevice *get_pci_device(uint16_t *bmdma_base)
 141 {
 142     QPCIDevice *dev;
 143     uint16_t vendor_id, device_id;
 144
 145     if (!pcibus) {
 146         pcibus = qpci_init_pc();
 147     }
 148
 149     /* Find PCI device and verify it's the right one */
 150     dev = qpci_device_find(pcibus, QPCI_DEVFN(IDE_PCI_DEV, IDE_PCI_FUNC));
 151     g_assert(dev != NULL);
 152
 153     vendor_id = qpci_config_readw(dev, PCI_VENDOR_ID);
 154     device_id = qpci_config_readw(dev, PCI_DEVICE_ID);
 155     g_assert(vendor_id == PCI_VENDOR_ID_INTEL);
 156     g_assert(device_id == PCI_DEVICE_ID_INTEL_82371SB_1);
 157
 158     /* Map bmdma BAR */
 159     *bmdma_base = (uint16_t)(uintptr_t) qpci_iomap(dev, 4, NULL);
 160
 161     qpci_device_enable(dev);
 162
 163     return dev;
 164 }
 165
 166 static void free_pci_device(QPCIDevice *dev)
 167 {
 168     /* libqos doesn't have a function for this, so free it manually */
 169     g_free(dev);
 170 }
 171
 172 typedef struct PrdtEntry {
 173     uint32_t addr;
 174     uint32_t size;
 175 } QEMU_PACKED PrdtEntry;
 176
 177 #define assert_bit_set(data, mask) g_assert_cmphex((data) & (mask), ==, (mask))
 178 #define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
 179
 180 static int send_dma_request(int cmd, uint64_t sector, int nb_sectors,
 181                             PrdtEntry *prdt, int prdt_entries,
 182                             void(*post_exec)(uint64_t sector, int nb_sectors))
 183 {
 184     QPCIDevice *dev;
 185     uint16_t bmdma_base;
 186     uintptr_t guest_prdt;
 187     size_t len;
 188     bool from_dev;
 189     uint8_t status;
 190     int flags;
 191
 192     dev = get_pci_device(&bmdma_base);
 193
 194     flags = cmd & ~0xff;
 195     cmd &= 0xff;
 196
 197     switch (cmd) {
 198     case CMD_READ_DMA:
 199     case CMD_PACKET:
 200         /* Assuming we only test data reads w/ ATAPI, otherwise we need to know
 201          * the SCSI command being sent in the packet, too. */
 202         from_dev = true;
 203         break;
 204     case CMD_WRITE_DMA:
 205         from_dev = false;
 206         break;
 207     default:
 208         g_assert_not_reached();
 209     }
 210
 211     if (flags & CMDF_NO_BM) {
 212         qpci_config_writew(dev, PCI_COMMAND,
 213                            PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
 214     }
 215
 216     /* Select device 0 */
 217     outb(IDE_BASE + reg_device, 0 | LBA);
 218
 219     /* Stop any running transfer, clear any pending interrupt */
 220     outb(bmdma_base + bmreg_cmd, 0);
 221     outb(bmdma_base + bmreg_status, BM_STS_INTR);
 222
 223     /* Setup PRDT */
 224     len = sizeof(*prdt) * prdt_entries;
 225     guest_prdt = guest_alloc(guest_malloc, len);
 226     memwrite(guest_prdt, prdt, len);
 227     outl(bmdma_base + bmreg_prdt, guest_prdt);
 228
 229     /* ATA DMA command */
 230     if (cmd == CMD_PACKET) {
 231         /* Enables ATAPI DMA; otherwise PIO is attempted */
 232         outb(IDE_BASE + reg_feature, 0x01);
 233     } else {
 234         outb(IDE_BASE + reg_nsectors, nb_sectors);
 235         outb(IDE_BASE + reg_lba_low,    sector & 0xff);
 236         outb(IDE_BASE + reg_lba_middle, (sector >> 8) & 0xff);
 237         outb(IDE_BASE + reg_lba_high,   (sector >> 16) & 0xff);
 238     }
 239
 240     outb(IDE_BASE + reg_command, cmd);
 241
 242     if (post_exec) {
 243         post_exec(sector, nb_sectors);
 244     }
 245
 246     /* Start DMA transfer */
 247     outb(bmdma_base + bmreg_cmd, BM_CMD_START | (from_dev ? BM_CMD_WRITE : 0));
 248
 249     if (flags & CMDF_ABORT) {
 250         outb(bmdma_base + bmreg_cmd, 0);
 251     }
 252
 253     /* Wait for the DMA transfer to complete */
 254     do {
 255         status = inb(bmdma_base + bmreg_status);
 256     } while ((status & (BM_STS_ACTIVE | BM_STS_INTR)) == BM_STS_ACTIVE);
 257
 258     g_assert_cmpint(get_irq(IDE_PRIMARY_IRQ), ==, !!(status & BM_STS_INTR));
 259
 260     /* Check IDE status code */
 261     assert_bit_set(inb(IDE_BASE + reg_status), DRDY);
 262     assert_bit_clear(inb(IDE_BASE + reg_status), BSY | DRQ);
 263
 264     /* Reading the status register clears the IRQ */
 265     g_assert(!get_irq(IDE_PRIMARY_IRQ));
 266
 267     /* Stop DMA transfer if still active */
 268     if (status & BM_STS_ACTIVE) {
 269         outb(bmdma_base + bmreg_cmd, 0);
 270     }
 271
 272     free_pci_device(dev);
 273
 274     return status;
 275 }
 276
 277 static void test_bmdma_simple_rw(void)
 278 {
 279     uint8_t status;
 280     uint8_t *buf;
 281     uint8_t *cmpbuf;
 282     size_t len = 512;
 283     uintptr_t guest_buf = guest_alloc(guest_malloc, len);
 284
 285     PrdtEntry prdt[] = {
 286         {
 287             .addr = cpu_to_le32(guest_buf),
 288             .size = cpu_to_le32(len | PRDT_EOT),
 289         },
 290     };
 291
 292     buf = g_malloc(len);
 293     cmpbuf = g_malloc(len);
 294
 295     /* Write 0x55 pattern to sector 0 */
 296     memset(buf, 0x55, len);
 297     memwrite(guest_buf, buf, len);
 298
 299     status = send_dma_request(CMD_WRITE_DMA, 0, 1, prdt,
 300                               ARRAY_SIZE(prdt), NULL);
 301     g_assert_cmphex(status, ==, BM_STS_INTR);
 302     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 303
 304     /* Write 0xaa pattern to sector 1 */
 305     memset(buf, 0xaa, len);
 306     memwrite(guest_buf, buf, len);
 307
 308     status = send_dma_request(CMD_WRITE_DMA, 1, 1, prdt,
 309                               ARRAY_SIZE(prdt), NULL);
 310     g_assert_cmphex(status, ==, BM_STS_INTR);
 311     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 312
 313     /* Read and verify 0x55 pattern in sector 0 */
 314     memset(cmpbuf, 0x55, len);
 315
 316     status = send_dma_request(CMD_READ_DMA, 0, 1, prdt, ARRAY_SIZE(prdt), NULL);
 317     g_assert_cmphex(status, ==, BM_STS_INTR);
 318     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 319
 320     memread(guest_buf, buf, len);
 321     g_assert(memcmp(buf, cmpbuf, len) == 0);
 322
 323     /* Read and verify 0xaa pattern in sector 1 */
 324     memset(cmpbuf, 0xaa, len);
 325
 326     status = send_dma_request(CMD_READ_DMA, 1, 1, prdt, ARRAY_SIZE(prdt), NULL);
 327     g_assert_cmphex(status, ==, BM_STS_INTR);
 328     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 329
 330     memread(guest_buf, buf, len);
 331     g_assert(memcmp(buf, cmpbuf, len) == 0);
 332
 333
 334     g_free(buf);
 335     g_free(cmpbuf);
 336 }
 337
 338 static void test_bmdma_short_prdt(void)
 339 {
 340     uint8_t status;
 341
 342     PrdtEntry prdt[] = {
 343         {
 344             .addr = 0,
 345             .size = cpu_to_le32(0x10 | PRDT_EOT),
 346         },
 347     };
 348
 349     /* Normal request */
 350     status = send_dma_request(CMD_READ_DMA, 0, 1,
 351                               prdt, ARRAY_SIZE(prdt), NULL);
 352     g_assert_cmphex(status, ==, 0);
 353     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 354
 355     /* Abort the request before it completes */
 356     status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 1,
 357                               prdt, ARRAY_SIZE(prdt), NULL);
 358     g_assert_cmphex(status, ==, 0);
 359     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 360 }
 361
 362 static void test_bmdma_one_sector_short_prdt(void)
 363 {
 364     uint8_t status;
 365
 366     /* Read 2 sectors but only give 1 sector in PRDT */
 367     PrdtEntry prdt[] = {
 368         {
 369             .addr = 0,
 370             .size = cpu_to_le32(0x200 | PRDT_EOT),
 371         },
 372     };
 373
 374     /* Normal request */
 375     status = send_dma_request(CMD_READ_DMA, 0, 2,
 376                               prdt, ARRAY_SIZE(prdt), NULL);
 377     g_assert_cmphex(status, ==, 0);
 378     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 379
 380     /* Abort the request before it completes */
 381     status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 2,
 382                               prdt, ARRAY_SIZE(prdt), NULL);
 383     g_assert_cmphex(status, ==, 0);
 384     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 385 }
 386
 387 static void test_bmdma_long_prdt(void)
 388 {
 389     uint8_t status;
 390
 391     PrdtEntry prdt[] = {
 392         {
 393             .addr = 0,
 394             .size = cpu_to_le32(0x1000 | PRDT_EOT),
 395         },
 396     };
 397
 398     /* Normal request */
 399     status = send_dma_request(CMD_READ_DMA, 0, 1,
 400                               prdt, ARRAY_SIZE(prdt), NULL);
 401     g_assert_cmphex(status, ==, BM_STS_ACTIVE | BM_STS_INTR);
 402     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 403
 404     /* Abort the request before it completes */
 405     status = send_dma_request(CMD_READ_DMA | CMDF_ABORT, 0, 1,
 406                               prdt, ARRAY_SIZE(prdt), NULL);
 407     g_assert_cmphex(status, ==, BM_STS_INTR);
 408     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 409 }
 410
 411 static void test_bmdma_no_busmaster(void)
 412 {
 413     uint8_t status;
 414
 415     /* No PRDT_EOT, each entry addr 0/size 64k, and in theory qemu shouldn't be
 416      * able to access it anyway because the Bus Master bit in the PCI command
 417      * register isn't set. This is complete nonsense, but it used to be pretty
 418      * good at confusing and occasionally crashing qemu. */
 419     PrdtEntry prdt[4096] = { };
 420
 421     status = send_dma_request(CMD_READ_DMA | CMDF_NO_BM, 0, 512,
 422                               prdt, ARRAY_SIZE(prdt), NULL);
 423
 424     /* Not entirely clear what the expected result is, but this is what we get
 425      * in practice. At least we want to be aware of any changes. */
 426     g_assert_cmphex(status, ==, BM_STS_ACTIVE | BM_STS_INTR);
 427     assert_bit_clear(inb(IDE_BASE + reg_status), DF | ERR);
 428 }
 429
 430 static void test_bmdma_setup(void)
 431 {
 432     ide_test_start(
 433         "-drive file=%s,if=ide,serial=%s,cache=writeback,format=raw "
 434         "-global ide-hd.ver=%s",
 435         tmp_path, "testdisk", "version");
 436     qtest_irq_intercept_in(global_qtest, "ioapic");
 437 }
 438
 439 static void test_bmdma_teardown(void)
 440 {
 441     ide_test_quit();
 442 }
 443
 444 static void string_cpu_to_be16(uint16_t *s, size_t bytes)
 445 {
 446     g_assert((bytes & 1) == 0);
 447     bytes /= 2;
 448
 449     while (bytes--) {
 450         *s = cpu_to_be16(*s);
 451         s++;
 452     }
 453 }
 454
 455 static void test_identify(void)
 456 {
 457     uint8_t data;
 458     uint16_t buf[256];
 459     int i;
 460     int ret;
 461
 462     ide_test_start(
 463         "-drive file=%s,if=ide,serial=%s,cache=writeback,format=raw "
 464         "-global ide-hd.ver=%s",
 465         tmp_path, "testdisk", "version");
 466
 467     /* IDENTIFY command on device 0*/
 468     outb(IDE_BASE + reg_device, 0);
 469     outb(IDE_BASE + reg_command, CMD_IDENTIFY);
 470
 471     /* Read in the IDENTIFY buffer and check registers */
 472     data = inb(IDE_BASE + reg_device);
 473     g_assert_cmpint(data & DEV, ==, 0);
 474
 475     for (i = 0; i < 256; i++) {
 476         data = inb(IDE_BASE + reg_status);
 477         assert_bit_set(data, DRDY | DRQ);
 478         assert_bit_clear(data, BSY | DF | ERR);
 479
 480         ((uint16_t*) buf)[i] = inw(IDE_BASE + reg_data);
 481     }
 482
 483     data = inb(IDE_BASE + reg_status);
 484     assert_bit_set(data, DRDY);
 485     assert_bit_clear(data, BSY | DF | ERR | DRQ);
 486
 487     /* Check serial number/version in the buffer */
 488     string_cpu_to_be16(&buf[10], 20);
 489     ret = memcmp(&buf[10], "testdisk            ", 20);
 490     g_assert(ret == 0);
 491
 492     string_cpu_to_be16(&buf[23], 8);
 493     ret = memcmp(&buf[23], "version ", 8);
 494     g_assert(ret == 0);
 495
 496     /* Write cache enabled bit */
 497     assert_bit_set(buf[85], 0x20);
 498
 499     ide_test_quit();
 500 }
 501
 502 static void test_flush(void)
 503 {
 504     uint8_t data;
 505
 506     ide_test_start(
 507         "-drive file=blkdebug::%s,if=ide,cache=writeback,format=raw",
 508         tmp_path);
 509
 510     /* Delay the completion of the flush request until we explicitly do it */
 511     g_free(hmp("qemu-io ide0-hd0 \"break flush_to_os A\""));
 512
 513     /* FLUSH CACHE command on device 0*/
 514     outb(IDE_BASE + reg_device, 0);
 515     outb(IDE_BASE + reg_command, CMD_FLUSH_CACHE);
 516
 517     /* Check status while request is in flight*/
 518     data = inb(IDE_BASE + reg_status);
 519     assert_bit_set(data, BSY | DRDY);
 520     assert_bit_clear(data, DF | ERR | DRQ);
 521
 522     /* Complete the command */
 523     g_free(hmp("qemu-io ide0-hd0 \"resume A\""));
 524
 525     /* Check registers */
 526     data = inb(IDE_BASE + reg_device);
 527     g_assert_cmpint(data & DEV, ==, 0);
 528
 529     do {
 530         data = inb(IDE_BASE + reg_status);
 531     } while (data & BSY);
 532
 533     assert_bit_set(data, DRDY);
 534     assert_bit_clear(data, BSY | DF | ERR | DRQ);
 535
 536     ide_test_quit();
 537 }
 538
 539 static void test_retry_flush(const char *machine)
 540 {
 541     uint8_t data;
 542     const char *s;
 543
 544     prepare_blkdebug_script(debug_path, "flush_to_disk");
 545
 546     ide_test_start(
 547         "-vnc none "
 548         "-drive file=blkdebug:%s:%s,if=ide,cache=writeback,format=raw,"
 549         "rerror=stop,werror=stop",
 550         debug_path, tmp_path);
 551
 552     /* FLUSH CACHE command on device 0*/
 553     outb(IDE_BASE + reg_device, 0);
 554     outb(IDE_BASE + reg_command, CMD_FLUSH_CACHE);
 555
 556     /* Check status while request is in flight*/
 557     data = inb(IDE_BASE + reg_status);
 558     assert_bit_set(data, BSY | DRDY);
 559     assert_bit_clear(data, DF | ERR | DRQ);
 560
 561     qmp_eventwait("STOP");
 562
 563     /* Complete the command */
 564     s = "{'execute':'cont' }";
 565     qmp_discard_response(s);
 566
 567     /* Check registers */
 568     data = inb(IDE_BASE + reg_device);
 569     g_assert_cmpint(data & DEV, ==, 0);
 570
 571     do {
 572         data = inb(IDE_BASE + reg_status);
 573     } while (data & BSY);
 574
 575     assert_bit_set(data, DRDY);
 576     assert_bit_clear(data, BSY | DF | ERR | DRQ);
 577
 578     ide_test_quit();
 579 }
 580
 581 static void test_flush_nodev(void)
 582 {
 583     ide_test_start("");
 584
 585     /* FLUSH CACHE command on device 0*/
 586     outb(IDE_BASE + reg_device, 0);
 587     outb(IDE_BASE + reg_command, CMD_FLUSH_CACHE);
 588
 589     /* Just testing that qemu doesn't crash... */
 590
 591     ide_test_quit();
 592 }
 593
 594 static void test_pci_retry_flush(void)
 595 {
 596     test_retry_flush("pc");
 597 }
 598
 599 static void test_isa_retry_flush(void)
 600 {
 601     test_retry_flush("isapc");
 602 }
 603
 604 typedef struct Read10CDB {
 605     uint8_t opcode;
 606     uint8_t flags;
 607     uint32_t lba;
 608     uint8_t reserved;
 609     uint16_t nblocks;
 610     uint8_t control;
 611     uint16_t padding;
 612 } __attribute__((__packed__)) Read10CDB;
 613
 614 static void send_scsi_cdb_read10(uint64_t lba, int nblocks)
 615 {
 616     Read10CDB pkt = { .padding = 0 };
 617     int i;
 618
 619     g_assert_cmpint(lba, <=, UINT32_MAX);
 620     g_assert_cmpint(nblocks, <=, UINT16_MAX);
 621     g_assert_cmpint(nblocks, >=, 0);
 622
 623     /* Construct SCSI CDB packet */
 624     pkt.opcode = 0x28;
 625     pkt.lba = cpu_to_be32(lba);
 626     pkt.nblocks = cpu_to_be16(nblocks);
 627
 628     /* Send Packet */
 629     for (i = 0; i < sizeof(Read10CDB)/2; i++) {
 630         outw(IDE_BASE + reg_data, cpu_to_le16(((uint16_t *)&pkt)[i]));
 631     }
 632 }
 633
 634 static void nsleep(int64_t nsecs)
 635 {
 636     const struct timespec val = { .tv_nsec = nsecs };
 637     nanosleep(&val, NULL);
 638     clock_set(nsecs);
 639 }
 640
 641 static uint8_t ide_wait_clear(uint8_t flag)
 642 {
 643     uint8_t data;
 644     time_t st;
 645
 646     /* Wait with a 5 second timeout */
 647     time(&st);
 648     while (true) {
 649         data = inb(IDE_BASE + reg_status);
 650         if (!(data & flag)) {
 651             return data;
 652         }
 653         if (difftime(time(NULL), st) > 5.0) {
 654             break;
 655         }
 656         nsleep(400);
 657     }
 658     g_assert_not_reached();
 659 }
 660
 661 static void ide_wait_intr(int irq)
 662 {
 663     time_t st;
 664     bool intr;
 665
 666     time(&st);
 667     while (true) {
 668         intr = get_irq(irq);
 669         if (intr) {
 670             return;
 671         }
 672         if (difftime(time(NULL), st) > 5.0) {
 673             break;
 674         }
 675         nsleep(400);
 676     }
 677
 678     g_assert_not_reached();
 679 }
 680
 681 static void cdrom_pio_impl(int nblocks)
 682 {
 683     FILE *fh;
 684     int patt_blocks = MAX(16, nblocks);
 685     size_t patt_len = ATAPI_BLOCK_SIZE * patt_blocks;
 686     char *pattern = g_malloc(patt_len);
 687     size_t rxsize = ATAPI_BLOCK_SIZE * nblocks;
 688     uint16_t *rx = g_malloc0(rxsize);
 689     int i, j;
 690     uint8_t data;
 691     uint16_t limit;
 692
 693     /* Prepopulate the CDROM with an interesting pattern */
 694     generate_pattern(pattern, patt_len, ATAPI_BLOCK_SIZE);
 695     fh = fopen(tmp_path, "w+");
 696     fwrite(pattern, ATAPI_BLOCK_SIZE, patt_blocks, fh);
 697     fclose(fh);
 698
 699     ide_test_start("-drive if=none,file=%s,media=cdrom,format=raw,id=sr0,index=0 "
 700                    "-device ide-cd,drive=sr0,bus=ide.0", tmp_path);
 701     qtest_irq_intercept_in(global_qtest, "ioapic");
 702
 703     /* PACKET command on device 0 */
 704     outb(IDE_BASE + reg_device, 0);
 705     outb(IDE_BASE + reg_lba_middle, BYTE_COUNT_LIMIT & 0xFF);
 706     outb(IDE_BASE + reg_lba_high, (BYTE_COUNT_LIMIT >> 8 & 0xFF));
 707     outb(IDE_BASE + reg_command, CMD_PACKET);
 708     /* HP0: Check_Status_A State */
 709     nsleep(400);
 710     data = ide_wait_clear(BSY);
 711     /* HP1: Send_Packet State */
 712     assert_bit_set(data, DRQ | DRDY);
 713     assert_bit_clear(data, ERR | DF | BSY);
 714
 715     /* SCSI CDB (READ10) -- read n*2048 bytes from block 0 */
 716     send_scsi_cdb_read10(0, nblocks);
 717
 718     /* Read data back: occurs in bursts of 'BYTE_COUNT_LIMIT' bytes.
 719      * If BYTE_COUNT_LIMIT is odd, we transfer BYTE_COUNT_LIMIT - 1 bytes.
 720      * We allow an odd limit only when the remaining transfer size is
 721      * less than BYTE_COUNT_LIMIT. However, SCSI's read10 command can only
 722      * request n blocks, so our request size is always even.
 723      * For this reason, we assume there is never a hanging byte to fetch. */
 724     g_assert(!(rxsize & 1));
 725     limit = BYTE_COUNT_LIMIT & ~1;
 726     for (i = 0; i < DIV_ROUND_UP(rxsize, limit); i++) {
 727         size_t offset = i * (limit / 2);
 728         size_t rem = (rxsize / 2) - offset;
 729
 730         /* HP3: INTRQ_Wait */
 731         ide_wait_intr(IDE_PRIMARY_IRQ);
 732
 733         /* HP2: Check_Status_B (and clear IRQ) */
 734         data = ide_wait_clear(BSY);
 735         assert_bit_set(data, DRQ | DRDY);
 736         assert_bit_clear(data, ERR | DF | BSY);
 737
 738         /* HP4: Transfer_Data */
 739         for (j = 0; j < MIN((limit / 2), rem); j++) {
 740             rx[offset + j] = le16_to_cpu(inw(IDE_BASE + reg_data));
 741         }
 742     }
 743
 744     /* Check for final completion IRQ */
 745     ide_wait_intr(IDE_PRIMARY_IRQ);
 746
 747     /* Sanity check final state */
 748     data = ide_wait_clear(DRQ);
 749     assert_bit_set(data, DRDY);
 750     assert_bit_clear(data, DRQ | ERR | DF | BSY);
 751
 752     g_assert_cmpint(memcmp(pattern, rx, rxsize), ==, 0);
 753     g_free(pattern);
 754     g_free(rx);
 755     test_bmdma_teardown();
 756 }
 757
 758 static void test_cdrom_pio(void)
 759 {
 760     cdrom_pio_impl(1);
 761 }
 762
 763 static void test_cdrom_pio_large(void)
 764 {
 765     /* Test a few loops of the PIO DRQ mechanism. */
 766     cdrom_pio_impl(BYTE_COUNT_LIMIT * 4 / ATAPI_BLOCK_SIZE);
 767 }
 768
 769
 770 static void test_cdrom_dma(void)
 771 {
 772     static const size_t len = ATAPI_BLOCK_SIZE;
 773     char *pattern = g_malloc(ATAPI_BLOCK_SIZE * 16);
 774     char *rx = g_malloc0(len);
 775     uintptr_t guest_buf;
 776     PrdtEntry prdt[1];
 777     FILE *fh;
 778
 779     ide_test_start("-drive if=none,file=%s,media=cdrom,format=raw,id=sr0,index=0 "
 780                    "-device ide-cd,drive=sr0,bus=ide.0", tmp_path);
 781     qtest_irq_intercept_in(global_qtest, "ioapic");
 782
 783     guest_buf = guest_alloc(guest_malloc, len);
 784     prdt[0].addr = cpu_to_le32(guest_buf);
 785     prdt[0].size = cpu_to_le32(len | PRDT_EOT);
 786
 787     generate_pattern(pattern, ATAPI_BLOCK_SIZE * 16, ATAPI_BLOCK_SIZE);
 788     fh = fopen(tmp_path, "w+");
 789     fwrite(pattern, ATAPI_BLOCK_SIZE, 16, fh);
 790     fclose(fh);
 791
 792     send_dma_request(CMD_PACKET, 0, 1, prdt, 1, send_scsi_cdb_read10);
 793
 794     /* Read back data from guest memory into local qtest memory */
 795     memread(guest_buf, rx, len);
 796     g_assert_cmpint(memcmp(pattern, rx, len), ==, 0);
 797
 798     g_free(pattern);
 799     g_free(rx);
 800     test_bmdma_teardown();
 801 }
 802
 803 int main(int argc, char **argv)
 804 {
 805     const char *arch = qtest_get_arch();
 806     int fd;
 807     int ret;
 808
 809     /* Check architecture */
 810     if (strcmp(arch, "i386") && strcmp(arch, "x86_64")) {
 811         g_test_message("Skipping test for non-x86\n");
 812         return 0;
 813     }
 814
 815     /* Create temporary blkdebug instructions */
 816     fd = mkstemp(debug_path);
 817     g_assert(fd >= 0);
 818     close(fd);
 819
 820     /* Create a temporary raw image */
 821     fd = mkstemp(tmp_path);
 822     g_assert(fd >= 0);
 823     ret = ftruncate(fd, TEST_IMAGE_SIZE);
 824     g_assert(ret == 0);
 825     close(fd);
 826
 827     /* Run the tests */
 828     g_test_init(&argc, &argv, NULL);
 829
 830     qtest_add_func("/ide/identify", test_identify);
 831
 832     qtest_add_func("/ide/bmdma/setup", test_bmdma_setup);
 833     qtest_add_func("/ide/bmdma/simple_rw", test_bmdma_simple_rw);
 834     qtest_add_func("/ide/bmdma/short_prdt", test_bmdma_short_prdt);
 835     qtest_add_func("/ide/bmdma/one_sector_short_prdt",
 836                    test_bmdma_one_sector_short_prdt);
 837     qtest_add_func("/ide/bmdma/long_prdt", test_bmdma_long_prdt);
 838     qtest_add_func("/ide/bmdma/no_busmaster", test_bmdma_no_busmaster);
 839     qtest_add_func("/ide/bmdma/teardown", test_bmdma_teardown);
 840
 841     qtest_add_func("/ide/flush", test_flush);
 842     qtest_add_func("/ide/flush/nodev", test_flush_nodev);
 843     qtest_add_func("/ide/flush/retry_pci", test_pci_retry_flush);
 844     qtest_add_func("/ide/flush/retry_isa", test_isa_retry_flush);
 845
 846     qtest_add_func("/ide/cdrom/pio", test_cdrom_pio);
 847     qtest_add_func("/ide/cdrom/pio_large", test_cdrom_pio_large);
 848     qtest_add_func("/ide/cdrom/dma", test_cdrom_dma);
 849
 850     ret = g_test_run();
 851
 852     /* Cleanup */
 853     unlink(tmp_path);
 854     unlink(debug_path);
 855
 856     return ret;
 857 }