tests/fdc-test.c

   1 /*
   2  * Floppy test cases.
   3  *
   4  * Copyright (c) 2012 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 <stdint.h>
  26 #include <string.h>
  27 #include <stdio.h>
  28
  29 #include <glib.h>
  30
  31 #include "libqtest.h"
  32 #include "qemu-common.h"
  33
  34 #define TEST_IMAGE_SIZE 1440 * 1024
  35
  36 #define FLOPPY_BASE 0x3f0
  37 #define FLOPPY_IRQ 6
  38
  39 enum {
  40     reg_sra         = 0x0,
  41     reg_srb         = 0x1,
  42     reg_dor         = 0x2,
  43     reg_msr         = 0x4,
  44     reg_dsr         = 0x4,
  45     reg_fifo        = 0x5,
  46     reg_dir         = 0x7,
  47 };
  48
  49 enum {
  50     CMD_SENSE_INT           = 0x08,
  51     CMD_READ_ID             = 0x0a,
  52     CMD_SEEK                = 0x0f,
  53     CMD_VERIFY              = 0x16,
  54     CMD_READ                = 0xe6,
  55     CMD_RELATIVE_SEEK_OUT   = 0x8f,
  56     CMD_RELATIVE_SEEK_IN    = 0xcf,
  57 };
  58
  59 enum {
  60     BUSY    = 0x10,
  61     NONDMA  = 0x20,
  62     RQM     = 0x80,
  63     DIO     = 0x40,
  64
  65     DSKCHG  = 0x80,
  66 };
  67
  68 char test_image[] = "/tmp/qtest.XXXXXX";
  69
  70 #define assert_bit_set(data, mask) g_assert_cmphex((data) & (mask), ==, (mask))
  71 #define assert_bit_clear(data, mask) g_assert_cmphex((data) & (mask), ==, 0)
  72
  73 static uint8_t base = 0x70;
  74
  75 enum {
  76     CMOS_FLOPPY     = 0x10,
  77 };
  78
  79 static void floppy_send(uint8_t byte)
  80 {
  81     uint8_t msr;
  82
  83     msr = inb(FLOPPY_BASE + reg_msr);
  84     assert_bit_set(msr, RQM);
  85     assert_bit_clear(msr, DIO);
  86
  87     outb(FLOPPY_BASE + reg_fifo, byte);
  88 }
  89
  90 static uint8_t floppy_recv(void)
  91 {
  92     uint8_t msr;
  93
  94     msr = inb(FLOPPY_BASE + reg_msr);
  95     assert_bit_set(msr, RQM | DIO);
  96
  97     return inb(FLOPPY_BASE + reg_fifo);
  98 }
  99
 100 /* pcn: Present Cylinder Number */
 101 static void ack_irq(uint8_t *pcn)
 102 {
 103     uint8_t ret;
 104
 105     g_assert(get_irq(FLOPPY_IRQ));
 106     floppy_send(CMD_SENSE_INT);
 107     floppy_recv();
 108
 109     ret = floppy_recv();
 110     if (pcn != NULL) {
 111         *pcn = ret;
 112     }
 113
 114     g_assert(!get_irq(FLOPPY_IRQ));
 115 }
 116
 117 static uint8_t send_read_command(uint8_t cmd)
 118 {
 119     uint8_t drive = 0;
 120     uint8_t head = 0;
 121     uint8_t cyl = 0;
 122     uint8_t sect_addr = 1;
 123     uint8_t sect_size = 2;
 124     uint8_t eot = 1;
 125     uint8_t gap = 0x1b;
 126     uint8_t gpl = 0xff;
 127
 128     uint8_t msr = 0;
 129     uint8_t st0;
 130
 131     uint8_t ret = 0;
 132
 133     floppy_send(cmd);
 134     floppy_send(head << 2 | drive);
 135     g_assert(!get_irq(FLOPPY_IRQ));
 136     floppy_send(cyl);
 137     floppy_send(head);
 138     floppy_send(sect_addr);
 139     floppy_send(sect_size);
 140     floppy_send(eot);
 141     floppy_send(gap);
 142     floppy_send(gpl);
 143
 144     uint8_t i = 0;
 145     uint8_t n = 2;
 146     for (; i < n; i++) {
 147         msr = inb(FLOPPY_BASE + reg_msr);
 148         if (msr == 0xd0) {
 149             break;
 150         }
 151         sleep(1);
 152     }
 153
 154     if (i >= n) {
 155         return 1;
 156     }
 157
 158     st0 = floppy_recv();
 159     if (st0 != 0x40) {
 160         ret = 1;
 161     }
 162
 163     floppy_recv();
 164     floppy_recv();
 165     floppy_recv();
 166     floppy_recv();
 167     floppy_recv();
 168     floppy_recv();
 169
 170     return ret;
 171 }
 172
 173 static uint8_t send_read_no_dma_command(int nb_sect, uint8_t expected_st0)
 174 {
 175     uint8_t drive = 0;
 176     uint8_t head = 0;
 177     uint8_t cyl = 0;
 178     uint8_t sect_addr = 1;
 179     uint8_t sect_size = 2;
 180     uint8_t eot = nb_sect;
 181     uint8_t gap = 0x1b;
 182     uint8_t gpl = 0xff;
 183
 184     uint8_t msr = 0;
 185     uint8_t st0;
 186
 187     uint8_t ret = 0;
 188
 189     floppy_send(CMD_READ);
 190     floppy_send(head << 2 | drive);
 191     g_assert(!get_irq(FLOPPY_IRQ));
 192     floppy_send(cyl);
 193     floppy_send(head);
 194     floppy_send(sect_addr);
 195     floppy_send(sect_size);
 196     floppy_send(eot);
 197     floppy_send(gap);
 198     floppy_send(gpl);
 199
 200     uint16_t i = 0;
 201     uint8_t n = 2;
 202     for (; i < n; i++) {
 203         msr = inb(FLOPPY_BASE + reg_msr);
 204         if (msr == (BUSY | NONDMA | DIO | RQM)) {
 205             break;
 206         }
 207         sleep(1);
 208     }
 209
 210     if (i >= n) {
 211         return 1;
 212     }
 213
 214     /* Non-DMA mode */
 215     for (i = 0; i < 512 * 2 * nb_sect; i++) {
 216         msr = inb(FLOPPY_BASE + reg_msr);
 217         assert_bit_set(msr, BUSY | RQM | DIO);
 218         inb(FLOPPY_BASE + reg_fifo);
 219     }
 220
 221     st0 = floppy_recv();
 222     if (st0 != expected_st0) {
 223         ret = 1;
 224     }
 225
 226     floppy_recv();
 227     floppy_recv();
 228     floppy_recv();
 229     floppy_recv();
 230     floppy_recv();
 231     floppy_recv();
 232
 233     return ret;
 234 }
 235
 236 static void send_seek(int cyl)
 237 {
 238     int drive = 0;
 239     int head = 0;
 240
 241     floppy_send(CMD_SEEK);
 242     floppy_send(head << 2 | drive);
 243     g_assert(!get_irq(FLOPPY_IRQ));
 244     floppy_send(cyl);
 245     ack_irq(NULL);
 246 }
 247
 248 static uint8_t cmos_read(uint8_t reg)
 249 {
 250     outb(base + 0, reg);
 251     return inb(base + 1);
 252 }
 253
 254 static void test_cmos(void)
 255 {
 256     uint8_t cmos;
 257
 258     cmos = cmos_read(CMOS_FLOPPY);
 259     g_assert(cmos == 0x40);
 260 }
 261
 262 static void test_no_media_on_start(void)
 263 {
 264     uint8_t dir;
 265
 266     /* Media changed bit must be set all time after start if there is
 267      * no media in drive. */
 268     dir = inb(FLOPPY_BASE + reg_dir);
 269     assert_bit_set(dir, DSKCHG);
 270     dir = inb(FLOPPY_BASE + reg_dir);
 271     assert_bit_set(dir, DSKCHG);
 272     send_seek(1);
 273     dir = inb(FLOPPY_BASE + reg_dir);
 274     assert_bit_set(dir, DSKCHG);
 275     dir = inb(FLOPPY_BASE + reg_dir);
 276     assert_bit_set(dir, DSKCHG);
 277 }
 278
 279 static void test_read_without_media(void)
 280 {
 281     uint8_t ret;
 282
 283     ret = send_read_command(CMD_READ);
 284     g_assert(ret == 0);
 285 }
 286
 287 static void test_media_insert(void)
 288 {
 289     uint8_t dir;
 290
 291     /* Insert media in drive. DSKCHK should not be reset until a step pulse
 292      * is sent. */
 293     qmp_discard_response("{'execute':'change', 'arguments':{"
 294                          " 'device':'floppy0', 'target': '%s' }}",
 295                          test_image);
 296     qmp_discard_response(""); /* ignore event
 297                                  (FIXME open -> open transition?!) */
 298     qmp_discard_response(""); /* ignore event */
 299
 300     dir = inb(FLOPPY_BASE + reg_dir);
 301     assert_bit_set(dir, DSKCHG);
 302     dir = inb(FLOPPY_BASE + reg_dir);
 303     assert_bit_set(dir, DSKCHG);
 304
 305     send_seek(0);
 306     dir = inb(FLOPPY_BASE + reg_dir);
 307     assert_bit_set(dir, DSKCHG);
 308     dir = inb(FLOPPY_BASE + reg_dir);
 309     assert_bit_set(dir, DSKCHG);
 310
 311     /* Step to next track should clear DSKCHG bit. */
 312     send_seek(1);
 313     dir = inb(FLOPPY_BASE + reg_dir);
 314     assert_bit_clear(dir, DSKCHG);
 315     dir = inb(FLOPPY_BASE + reg_dir);
 316     assert_bit_clear(dir, DSKCHG);
 317 }
 318
 319 static void test_media_change(void)
 320 {
 321     uint8_t dir;
 322
 323     test_media_insert();
 324
 325     /* Eject the floppy and check that DSKCHG is set. Reading it out doesn't
 326      * reset the bit. */
 327     qmp_discard_response("{'execute':'eject', 'arguments':{"
 328                          " 'device':'floppy0' }}");
 329     qmp_discard_response(""); /* ignore event */
 330
 331     dir = inb(FLOPPY_BASE + reg_dir);
 332     assert_bit_set(dir, DSKCHG);
 333     dir = inb(FLOPPY_BASE + reg_dir);
 334     assert_bit_set(dir, DSKCHG);
 335
 336     send_seek(0);
 337     dir = inb(FLOPPY_BASE + reg_dir);
 338     assert_bit_set(dir, DSKCHG);
 339     dir = inb(FLOPPY_BASE + reg_dir);
 340     assert_bit_set(dir, DSKCHG);
 341
 342     send_seek(1);
 343     dir = inb(FLOPPY_BASE + reg_dir);
 344     assert_bit_set(dir, DSKCHG);
 345     dir = inb(FLOPPY_BASE + reg_dir);
 346     assert_bit_set(dir, DSKCHG);
 347 }
 348
 349 static void test_sense_interrupt(void)
 350 {
 351     int drive = 0;
 352     int head = 0;
 353     int cyl = 0;
 354     int ret = 0;
 355
 356     floppy_send(CMD_SENSE_INT);
 357     ret = floppy_recv();
 358     g_assert(ret == 0x80);
 359
 360     floppy_send(CMD_SEEK);
 361     floppy_send(head << 2 | drive);
 362     g_assert(!get_irq(FLOPPY_IRQ));
 363     floppy_send(cyl);
 364
 365     floppy_send(CMD_SENSE_INT);
 366     ret = floppy_recv();
 367     g_assert(ret == 0x20);
 368     floppy_recv();
 369 }
 370
 371 static void test_relative_seek(void)
 372 {
 373     uint8_t drive = 0;
 374     uint8_t head = 0;
 375     uint8_t cyl = 1;
 376     uint8_t pcn;
 377
 378     /* Send seek to track 0 */
 379     send_seek(0);
 380
 381     /* Send relative seek to increase track by 1 */
 382     floppy_send(CMD_RELATIVE_SEEK_IN);
 383     floppy_send(head << 2 | drive);
 384     g_assert(!get_irq(FLOPPY_IRQ));
 385     floppy_send(cyl);
 386
 387     ack_irq(&pcn);
 388     g_assert(pcn == 1);
 389
 390     /* Send relative seek to decrease track by 1 */
 391     floppy_send(CMD_RELATIVE_SEEK_OUT);
 392     floppy_send(head << 2 | drive);
 393     g_assert(!get_irq(FLOPPY_IRQ));
 394     floppy_send(cyl);
 395
 396     ack_irq(&pcn);
 397     g_assert(pcn == 0);
 398 }
 399
 400 static void test_read_id(void)
 401 {
 402     uint8_t drive = 0;
 403     uint8_t head = 0;
 404     uint8_t cyl;
 405     uint8_t st0;
 406
 407     /* Seek to track 0 and check with READ ID */
 408     send_seek(0);
 409
 410     floppy_send(CMD_READ_ID);
 411     g_assert(!get_irq(FLOPPY_IRQ));
 412     floppy_send(head << 2 | drive);
 413
 414     while (!get_irq(FLOPPY_IRQ)) {
 415         /* qemu involves a timer with READ ID... */
 416         clock_step(1000000000LL / 50);
 417     }
 418
 419     st0 = floppy_recv();
 420     floppy_recv();
 421     floppy_recv();
 422     cyl = floppy_recv();
 423     head = floppy_recv();
 424     floppy_recv();
 425     floppy_recv();
 426
 427     g_assert_cmpint(cyl, ==, 0);
 428     g_assert_cmpint(head, ==, 0);
 429     g_assert_cmpint(st0, ==, head << 2);
 430
 431     /* Seek to track 8 on head 1 and check with READ ID */
 432     head = 1;
 433     cyl = 8;
 434
 435     floppy_send(CMD_SEEK);
 436     floppy_send(head << 2 | drive);
 437     g_assert(!get_irq(FLOPPY_IRQ));
 438     floppy_send(cyl);
 439     g_assert(get_irq(FLOPPY_IRQ));
 440     ack_irq(NULL);
 441
 442     floppy_send(CMD_READ_ID);
 443     g_assert(!get_irq(FLOPPY_IRQ));
 444     floppy_send(head << 2 | drive);
 445
 446     while (!get_irq(FLOPPY_IRQ)) {
 447         /* qemu involves a timer with READ ID... */
 448         clock_step(1000000000LL / 50);
 449     }
 450
 451     st0 = floppy_recv();
 452     floppy_recv();
 453     floppy_recv();
 454     cyl = floppy_recv();
 455     head = floppy_recv();
 456     floppy_recv();
 457     floppy_recv();
 458
 459     g_assert_cmpint(cyl, ==, 8);
 460     g_assert_cmpint(head, ==, 1);
 461     g_assert_cmpint(st0, ==, head << 2);
 462 }
 463
 464 static void test_read_no_dma_1(void)
 465 {
 466     uint8_t ret;
 467
 468     outb(FLOPPY_BASE + reg_dor, inb(FLOPPY_BASE + reg_dor) & ~0x08);
 469     send_seek(0);
 470     ret = send_read_no_dma_command(1, 0x04);
 471     g_assert(ret == 0);
 472 }
 473
 474 static void test_read_no_dma_18(void)
 475 {
 476     uint8_t ret;
 477
 478     outb(FLOPPY_BASE + reg_dor, inb(FLOPPY_BASE + reg_dor) & ~0x08);
 479     send_seek(0);
 480     ret = send_read_no_dma_command(18, 0x04);
 481     g_assert(ret == 0);
 482 }
 483
 484 static void test_read_no_dma_19(void)
 485 {
 486     uint8_t ret;
 487
 488     outb(FLOPPY_BASE + reg_dor, inb(FLOPPY_BASE + reg_dor) & ~0x08);
 489     send_seek(0);
 490     ret = send_read_no_dma_command(19, 0x20);
 491     g_assert(ret == 0);
 492 }
 493
 494 static void test_verify(void)
 495 {
 496     uint8_t ret;
 497
 498     ret = send_read_command(CMD_VERIFY);
 499     g_assert(ret == 0);
 500 }
 501
 502 /* success if no crash or abort */
 503 static void fuzz_registers(void)
 504 {
 505     unsigned int i;
 506
 507     for (i = 0; i < 1000; i++) {
 508         uint8_t reg, val;
 509
 510         reg = (uint8_t)g_test_rand_int_range(0, 8);
 511         val = (uint8_t)g_test_rand_int_range(0, 256);
 512
 513         outb(FLOPPY_BASE + reg, val);
 514         inb(FLOPPY_BASE + reg);
 515     }
 516 }
 517
 518 int main(int argc, char **argv)
 519 {
 520     const char *arch = qtest_get_arch();
 521     int fd;
 522     int ret;
 523
 524     /* Check architecture */
 525     if (strcmp(arch, "i386") && strcmp(arch, "x86_64")) {
 526         g_test_message("Skipping test for non-x86\n");
 527         return 0;
 528     }
 529
 530     /* Create a temporary raw image */
 531     fd = mkstemp(test_image);
 532     g_assert(fd >= 0);
 533     ret = ftruncate(fd, TEST_IMAGE_SIZE);
 534     g_assert(ret == 0);
 535     close(fd);
 536
 537     /* Run the tests */
 538     g_test_init(&argc, &argv, NULL);
 539
 540     qtest_start(NULL);
 541     qtest_irq_intercept_in(global_qtest, "ioapic");
 542     qtest_add_func("/fdc/cmos", test_cmos);
 543     qtest_add_func("/fdc/no_media_on_start", test_no_media_on_start);
 544     qtest_add_func("/fdc/read_without_media", test_read_without_media);
 545     qtest_add_func("/fdc/media_change", test_media_change);
 546     qtest_add_func("/fdc/sense_interrupt", test_sense_interrupt);
 547     qtest_add_func("/fdc/relative_seek", test_relative_seek);
 548     qtest_add_func("/fdc/read_id", test_read_id);
 549     qtest_add_func("/fdc/verify", test_verify);
 550     qtest_add_func("/fdc/media_insert", test_media_insert);
 551     qtest_add_func("/fdc/read_no_dma_1", test_read_no_dma_1);
 552     qtest_add_func("/fdc/read_no_dma_18", test_read_no_dma_18);
 553     qtest_add_func("/fdc/read_no_dma_19", test_read_no_dma_19);
 554     qtest_add_func("/fdc/fuzz-registers", fuzz_registers);
 555
 556     ret = g_test_run();
 557
 558     /* Cleanup */
 559     qtest_end();
 560     unlink(test_image);
 561
 562     return ret;
 563 }