1 /* This file contains the device dependent part of a driver for the IBM-AT 2 * winchester controller. Written by Adri Koppes. 3 * 4 * Changes: 5 * Oct 2, 2013 drop non-PCI support; one controller per instance (David) 6 * Aug 19, 2005 ATA PCI support, supports SATA (Ben Gras) 7 * Nov 18, 2004 moved AT disk driver to user-space (Jorrit N. Herder) 8 * Aug 20, 2004 watchdogs replaced by sync alarms (Jorrit N. Herder) 9 * Mar 23, 2000 added ATAPI CDROM support (Michael Temari) 10 * May 14, 2000 d-d/i rewrite (Kees J. Bot) 11 * Apr 13, 1992 device dependent/independent split (Kees J. Bot) 12 */ 13 14 #include "at_wini.h" 15 16 #include <minix/sysutil.h> 17 #include <minix/type.h> 18 #include <minix/endpoint.h> 19 #include <sys/ioc_disk.h> 20 #include <machine/pci.h> 21 #include <sys/mman.h> 22 23 /* Variables. */ 24 25 /* Common command block */ 26 struct command { 27 u8_t precomp; /* REG_PRECOMP, etc. */ 28 u8_t count; 29 u8_t sector; 30 u8_t cyl_lo; 31 u8_t cyl_hi; 32 u8_t ldh; 33 u8_t command; 34 35 /* The following at for LBA48 */ 36 u8_t count_prev; 37 u8_t sector_prev; 38 u8_t cyl_lo_prev; 39 u8_t cyl_hi_prev; 40 }; 41 42 /* Timeouts and max retries. */ 43 static int timeout_usecs = DEF_TIMEOUT_USECS; 44 static int max_errors = MAX_ERRORS; 45 static long w_standard_timeouts = 0; 46 static long w_pci_debug = 0; 47 static long w_instance = 0; 48 static long disable_dma = 0; 49 static long atapi_debug = 0; 50 static long w_identify_wakeup_ticks; 51 static long wakeup_ticks; 52 static long w_atapi_dma; 53 54 static int w_testing = 0; 55 static int w_silent = 0; 56 57 static u32_t system_hz; 58 59 /* The struct wini is indexed by drive (0-3). */ 60 static struct wini { /* main drive struct, one entry per drive */ 61 unsigned state; /* drive state: deaf, initialized, dead */ 62 unsigned short w_status; /* device status register */ 63 unsigned base_cmd; /* command base register */ 64 unsigned base_ctl; /* control base register */ 65 unsigned base_dma; /* dma base register */ 66 unsigned char native; /* if set, drive is native (not compat.) */ 67 unsigned char lba48; /* if set, drive supports lba48 */ 68 unsigned char dma; /* if set, drive supports dma */ 69 unsigned char dma_intseen; /* if set, drive has seen an interrupt */ 70 int irq_hook_id; /* id of irq hook at the kernel */ 71 unsigned cylinders; /* physical number of cylinders */ 72 unsigned heads; /* physical number of heads */ 73 unsigned sectors; /* physical number of sectors per track */ 74 unsigned ldhpref; /* top four bytes of the LDH (head) register */ 75 unsigned max_count; /* max request for this drive */ 76 unsigned open_ct; /* in-use count */ 77 struct device part[DEV_PER_DRIVE]; /* disks and partitions */ 78 struct device subpart[SUB_PER_DRIVE]; /* subpartitions */ 79 } wini[MAX_DRIVES], *w_wn; 80 81 static int w_device = -1; 82 83 int w_command; /* current command in execution */ 84 static int w_drive; /* selected drive */ 85 static struct device *w_dv; /* device's base and size */ 86 87 static u8_t *tmp_buf; 88 89 #define ATA_DMA_SECTORS 64 90 #define ATA_DMA_BUF_SIZE (ATA_DMA_SECTORS*SECTOR_SIZE) 91 92 static char *dma_buf; 93 static phys_bytes dma_buf_phys; 94 95 #define N_PRDTE 1024 /* Should be enough for large requests */ 96 97 struct prdte 98 { 99 phys_bytes prdte_base; 100 u16_t prdte_count; 101 u8_t prdte_reserved; 102 u8_t prdte_flags; 103 }; 104 105 #define PRDT_BYTES (sizeof(struct prdte) * N_PRDTE) 106 static struct prdte *prdt; 107 static phys_bytes prdt_phys; 108 109 #define PRDTE_FL_EOT 0x80 /* End of table */ 110 111 static int w_probe(int skip, u16_t *vidp, u16_t *didp); 112 static void w_init(int devind, u16_t vid, u16_t did); 113 static int init_params(void); 114 static int w_do_open(devminor_t minor, int access); 115 static struct device *w_prepare(devminor_t dev); 116 static struct device *w_part(devminor_t minor); 117 static int w_identify(void); 118 static char *w_name(void); 119 static int w_specify(void); 120 static int w_io_test(void); 121 static ssize_t w_transfer(devminor_t minor, int do_write, u64_t position, 122 endpoint_t proc_nr, iovec_t *iov, unsigned int nr_req, int flags); 123 static int com_out(struct command *cmd); 124 static int com_out_ext(struct command *cmd); 125 static int setup_dma(unsigned *sizep, endpoint_t proc_nr, iovec_t *iov, 126 size_t addr_offset, int do_write); 127 static void w_need_reset(void); 128 static int w_do_close(devminor_t minor); 129 static int w_ioctl(devminor_t minor, unsigned long request, endpoint_t endpt, 130 cp_grant_id_t grant, endpoint_t user_endpt); 131 static void w_hw_int(unsigned int irqs); 132 static int com_simple(struct command *cmd); 133 static void w_timeout(void); 134 static int w_reset(void); 135 static void w_intr_wait(void); 136 static int at_intr_wait(void); 137 static int w_waitfor(int mask, int value); 138 static int w_waitfor_dma(unsigned int mask, unsigned int value); 139 static void w_geometry(devminor_t minor, struct part_geom *entry); 140 static int atapi_sendpacket(u8_t *packet, unsigned cnt, int do_dma); 141 static int atapi_intr_wait(int dma, size_t max); 142 static int atapi_open(void); 143 static void atapi_close(void); 144 static int atapi_transfer(int do_write, u64_t position, endpoint_t 145 endpt, iovec_t *iov, unsigned int nr_req); 146 147 /* Entry points to this driver. */ 148 static struct blockdriver w_dtab = { 149 .bdr_type = BLOCKDRIVER_TYPE_DISK, /* handle partition requests */ 150 .bdr_open = w_do_open, /* open or mount request, initialize device */ 151 .bdr_close = w_do_close, /* release device */ 152 .bdr_transfer = w_transfer, /* do the I/O */ 153 .bdr_ioctl = w_ioctl, /* I/O control requests */ 154 .bdr_part = w_part, /* return partition information */ 155 .bdr_geometry = w_geometry, /* tell the geometry of the disk */ 156 .bdr_intr = w_hw_int, /* leftover hardware interrupts */ 157 }; 158 159 /* SEF functions and variables. */ 160 static void sef_local_startup(void); 161 static int sef_cb_init_fresh(int type, sef_init_info_t *info); 162 163 /*===========================================================================* 164 * at_winchester_task * 165 *===========================================================================*/ 166 int main(int argc, char *argv[]) 167 { 168 /* SEF local startup. */ 169 env_setargs(argc, argv); 170 sef_local_startup(); 171 172 /* Call the generic receive loop. */ 173 blockdriver_task(&w_dtab); 174 175 return(OK); 176 } 177 178 /*===========================================================================* 179 * sef_local_startup * 180 *===========================================================================*/ 181 static void sef_local_startup(void) 182 { 183 /* Register init callbacks. */ 184 sef_setcb_init_fresh(sef_cb_init_fresh); 185 186 /* Register live update callbacks. */ 187 sef_setcb_lu_prepare(sef_cb_lu_prepare); 188 sef_setcb_lu_state_isvalid(sef_cb_lu_state_isvalid); 189 sef_setcb_lu_state_dump(sef_cb_lu_state_dump); 190 191 /* Let SEF perform startup. */ 192 sef_startup(); 193 } 194 195 /*===========================================================================* 196 * sef_cb_init_fresh * 197 *===========================================================================*/ 198 static int sef_cb_init_fresh(int type, sef_init_info_t *UNUSED(info)) 199 { 200 /* Initialize the at_wini driver. */ 201 int skip, devind; 202 u16_t vid, did; 203 204 system_hz = sys_hz(); 205 206 if (!(tmp_buf = alloc_contig(2*DMA_BUF_SIZE, AC_ALIGN4K, NULL))) 207 panic("unable to allocate temporary buffer"); 208 209 w_identify_wakeup_ticks = WAKEUP_TICKS; 210 wakeup_ticks = WAKEUP_TICKS; 211 212 /* Set special disk parameters. */ 213 skip = init_params(); 214 215 /* Find the PCI device to use. If none found, terminate immediately. */ 216 devind = w_probe(skip, &vid, &did); 217 if (devind < 0) { 218 /* For now, complain only if even the first at_wini instance cannot 219 * find a device. There may be only one IDE controller after all, 220 * but if there are none, the system should probably be booted with 221 * another driver, and that's something the user might want to know. 222 */ 223 if (w_instance == 0) 224 panic("no matching device found"); 225 return ENODEV; /* the actual error code doesn't matter */ 226 } 227 228 /* Initialize the device. */ 229 w_init(devind, vid, did); 230 231 /* Announce we are up! */ 232 blockdriver_announce(type); 233 234 return(OK); 235 } 236 237 /*===========================================================================* 238 * init_params * 239 *===========================================================================*/ 240 static int init_params(void) 241 { 242 /* This routine is called at startup to initialize the drive parameters. */ 243 int drive; 244 long wakeup_secs = WAKEUP_SECS; 245 246 /* Boot variables. */ 247 env_parse("instance", "d", 0, &w_instance, 0, 8); 248 env_parse("ata_std_timeout", "d", 0, &w_standard_timeouts, 0, 1); 249 env_parse("ata_pci_debug", "d", 0, &w_pci_debug, 0, 1); 250 env_parse(NO_DMA_VAR, "d", 0, &disable_dma, 0, 1); 251 env_parse("ata_id_timeout", "d", 0, &wakeup_secs, 1, 60); 252 env_parse("atapi_debug", "d", 0, &atapi_debug, 0, 1); 253 env_parse("atapi_dma", "d", 0, &w_atapi_dma, 0, 1); 254 255 w_identify_wakeup_ticks = wakeup_secs * system_hz; 256 257 if(atapi_debug) 258 panic("atapi_debug"); 259 260 if(w_identify_wakeup_ticks <= 0) { 261 printf("changing wakeup from %ld to %d ticks.\n", 262 w_identify_wakeup_ticks, WAKEUP_TICKS); 263 w_identify_wakeup_ticks = WAKEUP_TICKS; 264 } 265 266 if (disable_dma) { 267 printf("at_wini%ld: DMA for ATA devices is disabled.\n", w_instance); 268 } else { 269 /* Ask for anonymous memory for DMA, that is physically contiguous. */ 270 dma_buf = alloc_contig(ATA_DMA_BUF_SIZE, 0, &dma_buf_phys); 271 prdt = alloc_contig(PRDT_BYTES, 0, &prdt_phys); 272 if(!dma_buf || !prdt) { 273 disable_dma = 1; 274 printf("at_wini%ld: no dma\n", w_instance); 275 } 276 } 277 278 for (drive = 0; drive < MAX_DRIVES; drive++) 279 wini[drive].state = IGNORING; 280 281 return (int) w_instance; 282 } 283 284 /*===========================================================================* 285 * init_drive * 286 *===========================================================================*/ 287 static void init_drive(int drive, int base_cmd, int base_ctl, int base_dma, 288 int native, int hook) 289 { 290 struct wini *w; 291 292 w = &wini[drive]; 293 294 w->state = 0; 295 w->w_status = 0; 296 w->base_cmd = base_cmd; 297 w->base_ctl = base_ctl; 298 w->base_dma = base_dma; 299 if (w_pci_debug) 300 printf("at_wini%ld: drive %d: base_cmd 0x%x, base_ctl 0x%x, " 301 "base_dma 0x%x\n", w_instance, drive, w->base_cmd, w->base_ctl, 302 w->base_dma); 303 w->native = native; 304 w->irq_hook_id = hook; 305 w->ldhpref = ldh_init(drive); 306 w->max_count = MAX_SECS << SECTOR_SHIFT; 307 w->lba48 = 0; 308 w->dma = 0; 309 } 310 311 /*===========================================================================* 312 * w_probe * 313 *===========================================================================*/ 314 static int w_probe(int skip, u16_t *vidp, u16_t *didp) 315 { 316 /* Go through the PCI devices that have been made visible to us, skipping as 317 * many as requested and then reserving the first one after that. We assume 318 * that all visible devices are in fact devices we can handle. 319 */ 320 int r, devind; 321 322 pci_init(); 323 324 r = pci_first_dev(&devind, vidp, didp); 325 if (r <= 0) 326 return -1; 327 328 while (skip--) { 329 r = pci_next_dev(&devind, vidp, didp); 330 if (r <= 0) 331 return -1; 332 } 333 334 pci_reserve(devind); 335 336 return devind; 337 } 338 339 /*===========================================================================* 340 * w_init * 341 *===========================================================================*/ 342 static void w_init(int devind, u16_t vid, u16_t did) 343 { 344 /* Initialize drives on the controller that we found and reserved. Each 345 * controller has two channels, each of which may have up to two disks 346 * attached, so the maximum number of disks per controller is always four. 347 * In this function, we always initialize the slots for all four disks; later, 348 * during normal operation, we determine whether the disks are actually there. 349 * For pure IDE devices (as opposed to e.g. RAID devices), each of the two 350 * channels on the controller may be in native or compatibility mode. The PCI 351 * interface field tells us which channel is in which mode. For native 352 * channels, we get the IRQ and the channel's base control and command 353 * addresses from the PCI slot, and we manually acknowledge interrupts. For 354 * compatibility channels, we use the hardcoded legacy IRQs and addresses, and 355 * enable automatic IRQ reenabling. In both cases, we get the base DMA address 356 * from the PCI slot if it is there. 357 */ 358 int r, irq, native_hook, compat_hook, is_ide, nhooks; 359 u8_t bcr, scr, interface; 360 u16_t cr; 361 u32_t base_cmd, base_ctl, base_dma; 362 363 bcr= pci_attr_r8(devind, PCI_BCR); 364 scr= pci_attr_r8(devind, PCI_SCR); 365 interface= pci_attr_r8(devind, PCI_PIFR); 366 367 is_ide = (bcr == PCI_BCR_MASS_STORAGE && scr == PCI_MS_IDE); 368 369 irq = pci_attr_r8(devind, PCI_ILR); 370 base_dma = pci_attr_r32(devind, PCI_BAR_5) & PCI_BAR_IO_MASK; 371 372 nhooks = 0; /* we don't care about notify IDs, but they must be unique */ 373 374 /* Any native drives? Then register their native IRQ first. */ 375 if (!is_ide || (interface & (ATA_IF_NATIVE0 | ATA_IF_NATIVE1))) { 376 native_hook = nhooks++; 377 if ((r = sys_irqsetpolicy(irq, 0, &native_hook)) != OK) 378 panic("couldn't set native IRQ policy %d: %d", irq, r); 379 if ((r = sys_irqenable(&native_hook)) != OK) 380 panic("couldn't enable native IRQ line %d: %d", irq, r); 381 } 382 383 /* Add drives on the primary channel. */ 384 if (!is_ide || (interface & ATA_IF_NATIVE0)) { 385 base_cmd = pci_attr_r32(devind, PCI_BAR) & PCI_BAR_IO_MASK; 386 base_ctl = pci_attr_r32(devind, PCI_BAR_2) & PCI_BAR_IO_MASK; 387 388 init_drive(0, base_cmd, base_ctl+PCI_CTL_OFF, base_dma, TRUE, 389 native_hook); 390 init_drive(1, base_cmd, base_ctl+PCI_CTL_OFF, base_dma, TRUE, 391 native_hook); 392 393 if (w_pci_debug) 394 printf("at_wini%ld: native 0 on %d: 0x%x 0x%x irq %d\n", 395 w_instance, devind, base_cmd, base_ctl, irq); 396 } else { 397 /* Register first compatibility IRQ. */ 398 compat_hook = nhooks++; 399 if ((r = sys_irqsetpolicy(AT_WINI_0_IRQ, IRQ_REENABLE, 400 &compat_hook)) != OK) 401 panic("couldn't set compat(0) IRQ policy: %d", r); 402 if ((r = sys_irqenable(&compat_hook)) != OK) 403 panic("couldn't enable compat(0) IRQ line: %d", r); 404 405 init_drive(0, REG_CMD_BASE0, REG_CTL_BASE0, base_dma, FALSE, 406 compat_hook); 407 init_drive(1, REG_CMD_BASE0, REG_CTL_BASE0, base_dma, FALSE, 408 compat_hook); 409 410 if (w_pci_debug) 411 printf("at_wini%ld: compat 0 on %d\n", w_instance, devind); 412 } 413 414 /* Add drives on the secondary channel. */ 415 if (base_dma != 0) 416 base_dma += PCI_DMA_2ND_OFF; 417 if (!is_ide || (interface & ATA_IF_NATIVE1)) { 418 base_cmd = pci_attr_r32(devind, PCI_BAR_3) & PCI_BAR_IO_MASK; 419 base_ctl = pci_attr_r32(devind, PCI_BAR_4) & PCI_BAR_IO_MASK; 420 init_drive(2, base_cmd, base_ctl+PCI_CTL_OFF, base_dma, TRUE, 421 native_hook); 422 init_drive(3, base_cmd, base_ctl+PCI_CTL_OFF, base_dma, TRUE, 423 native_hook); 424 if (w_pci_debug) 425 printf("at_wini%ld: native 1 on %d: 0x%x 0x%x irq %d\n", 426 w_instance, devind, base_cmd, base_ctl, irq); 427 } else { 428 /* Register secondary compatibility IRQ. */ 429 compat_hook = nhooks++; 430 if ((r = sys_irqsetpolicy(AT_WINI_1_IRQ, IRQ_REENABLE, 431 &compat_hook)) != OK) 432 panic("couldn't set compat(1) IRQ policy: %d", r); 433 if ((r = sys_irqenable(&compat_hook)) != OK) 434 panic("couldn't enable compat(1) IRQ line: %d", r); 435 436 init_drive(2, REG_CMD_BASE1, REG_CTL_BASE1, base_dma, FALSE, 437 compat_hook); 438 init_drive(3, REG_CMD_BASE1, REG_CTL_BASE1, base_dma, FALSE, 439 compat_hook); 440 441 if (w_pci_debug) 442 printf("at_wini%ld: compat 1 on %d\n", w_instance, devind); 443 } 444 445 /* Enable busmastering if necessary. */ 446 cr = pci_attr_r16(devind, PCI_CR); 447 if (!(cr & PCI_CR_MAST_EN)) 448 pci_attr_w16(devind, PCI_CR, cr | PCI_CR_MAST_EN); 449 } 450 451 /*===========================================================================* 452 * w_do_open * 453 *===========================================================================*/ 454 static int w_do_open(devminor_t minor, int access) 455 { 456 /* Device open: Initialize the controller and read the partition table. */ 457 458 struct wini *wn; 459 460 if (w_prepare(minor) == NULL) return(ENXIO); 461 462 wn = w_wn; 463 464 /* If we've probed it before and it failed, don't probe it again. */ 465 if (wn->state & IGNORING) return ENXIO; 466 467 /* If we haven't identified it yet, or it's gone deaf, 468 * (re-)identify it. 469 */ 470 if (!(wn->state & IDENTIFIED) || (wn->state & DEAF)) { 471 /* Try to identify the device. */ 472 if (w_identify() != OK) { 473 #if VERBOSE 474 printf("%s: identification failed\n", w_name()); 475 #endif 476 if (wn->state & DEAF){ 477 int err = w_reset(); 478 if( err != OK ){ 479 return err; 480 } 481 } 482 wn->state = IGNORING; 483 return(ENXIO); 484 } 485 /* Do a test transaction unless it's a CD drive (then 486 * we can believe the controller, and a test may fail 487 * due to no CD being in the drive). If it fails, ignore 488 * the device forever. 489 */ 490 if (!(wn->state & ATAPI) && w_io_test() != OK) { 491 wn->state |= IGNORING; 492 return(ENXIO); 493 } 494 } 495 496 if ((wn->state & ATAPI) && (access & BDEV_W_BIT)) 497 return(EACCES); 498 499 /* Partition the drive if it's being opened for the first time, 500 * or being opened after being closed. 501 */ 502 if (wn->open_ct == 0) { 503 if (wn->state & ATAPI) { 504 int r; 505 if ((r = atapi_open()) != OK) return(r); 506 } 507 508 /* Partition the disk. */ 509 partition(&w_dtab, w_drive * DEV_PER_DRIVE, P_PRIMARY, 510 wn->state & ATAPI); 511 } 512 wn->open_ct++; 513 return(OK); 514 } 515 516 /*===========================================================================* 517 * w_prepare * 518 *===========================================================================*/ 519 static struct device *w_prepare(devminor_t device) 520 { 521 /* Prepare for I/O on a device. */ 522 w_device = (int) device; 523 524 if (device >= 0 && device < NR_MINORS) { /* d0, d0p[0-3], d1, ... */ 525 w_drive = device / DEV_PER_DRIVE; /* save drive number */ 526 if (w_drive >= MAX_DRIVES) return(NULL); 527 w_wn = &wini[w_drive]; 528 w_dv = &w_wn->part[device % DEV_PER_DRIVE]; 529 } else 530 if ((unsigned) (device -= MINOR_d0p0s0) < NR_SUBDEVS) {/*d[0-7]p[0-3]s[0-3]*/ 531 w_drive = device / SUB_PER_DRIVE; 532 if (w_drive >= MAX_DRIVES) return(NULL); 533 w_wn = &wini[w_drive]; 534 w_dv = &w_wn->subpart[device % SUB_PER_DRIVE]; 535 } else { 536 w_device = -1; 537 return(NULL); 538 } 539 return(w_dv); 540 } 541 542 /*===========================================================================* 543 * w_part * 544 *===========================================================================*/ 545 static struct device *w_part(devminor_t device) 546 { 547 /* Return a pointer to the partition information of the given minor device. */ 548 549 return w_prepare(device); 550 } 551 552 #define id_byte(n) (&tmp_buf[2 * (n)]) 553 #define id_word(n) (((u16_t) id_byte(n)[0] << 0) \ 554 |((u16_t) id_byte(n)[1] << 8)) 555 #define id_longword(n) (((u32_t) id_byte(n)[0] << 0) \ 556 |((u32_t) id_byte(n)[1] << 8) \ 557 |((u32_t) id_byte(n)[2] << 16) \ 558 |((u32_t) id_byte(n)[3] << 24)) 559 560 /*===========================================================================* 561 * check_dma * 562 *===========================================================================*/ 563 static void 564 check_dma(struct wini *wn) 565 { 566 u32_t dma_status, dma_base; 567 int id_dma, ultra_dma; 568 u16_t w; 569 570 wn->dma= 0; 571 572 if (disable_dma) 573 return; 574 575 w= id_word(ID_CAPABILITIES); 576 id_dma= !!(w & ID_CAP_DMA); 577 w= id_byte(ID_FIELD_VALIDITY)[0]; 578 ultra_dma= !!(w & ID_FV_88); 579 dma_base= wn->base_dma; 580 581 if (dma_base) { 582 if (sys_inb(dma_base + DMA_STATUS, &dma_status) != OK) { 583 panic("unable to read DMA status register"); 584 } 585 } 586 587 if (id_dma && dma_base) { 588 w= id_word(ID_MULTIWORD_DMA); 589 if (w_pci_debug && 590 (w & (ID_MWDMA_2_SUP|ID_MWDMA_1_SUP|ID_MWDMA_0_SUP))) { 591 printf( 592 "%s: multiword DMA modes supported:%s%s%s\n", 593 w_name(), 594 (w & ID_MWDMA_0_SUP) ? " 0" : "", 595 (w & ID_MWDMA_1_SUP) ? " 1" : "", 596 (w & ID_MWDMA_2_SUP) ? " 2" : ""); 597 } 598 if (w_pci_debug && 599 (w & (ID_MWDMA_0_SEL|ID_MWDMA_1_SEL|ID_MWDMA_2_SEL))) { 600 printf( 601 "%s: multiword DMA mode selected:%s%s%s\n", 602 w_name(), 603 (w & ID_MWDMA_0_SEL) ? " 0" : "", 604 (w & ID_MWDMA_1_SEL) ? " 1" : "", 605 (w & ID_MWDMA_2_SEL) ? " 2" : ""); 606 } 607 if (w_pci_debug && ultra_dma) { 608 w= id_word(ID_ULTRA_DMA); 609 if (w & (ID_UDMA_0_SUP|ID_UDMA_1_SUP| 610 ID_UDMA_2_SUP|ID_UDMA_3_SUP| 611 ID_UDMA_4_SUP|ID_UDMA_5_SUP)) { 612 printf( 613 "%s: Ultra DMA modes supported:%s%s%s%s%s%s\n", 614 w_name(), 615 (w & ID_UDMA_0_SUP) ? " 0" : "", 616 (w & ID_UDMA_1_SUP) ? " 1" : "", 617 (w & ID_UDMA_2_SUP) ? " 2" : "", 618 (w & ID_UDMA_3_SUP) ? " 3" : "", 619 (w & ID_UDMA_4_SUP) ? " 4" : "", 620 (w & ID_UDMA_5_SUP) ? " 5" : ""); 621 } 622 if (w & (ID_UDMA_0_SEL|ID_UDMA_1_SEL| 623 ID_UDMA_2_SEL|ID_UDMA_3_SEL| 624 ID_UDMA_4_SEL|ID_UDMA_5_SEL)) { 625 printf( 626 "%s: Ultra DMA mode selected:%s%s%s%s%s%s\n", 627 w_name(), 628 (w & ID_UDMA_0_SEL) ? " 0" : "", 629 (w & ID_UDMA_1_SEL) ? " 1" : "", 630 (w & ID_UDMA_2_SEL) ? " 2" : "", 631 (w & ID_UDMA_3_SEL) ? " 3" : "", 632 (w & ID_UDMA_4_SEL) ? " 4" : "", 633 (w & ID_UDMA_5_SEL) ? " 5" : ""); 634 } 635 } 636 wn->dma= 1; 637 } else if (id_dma || dma_base) { 638 printf("id_dma %d, dma_base 0x%x\n", id_dma, dma_base); 639 } else 640 printf("no DMA support\n"); 641 } 642 643 /*===========================================================================* 644 * w_identify * 645 *===========================================================================*/ 646 static int w_identify(void) 647 { 648 /* Find out if a device exists, if it is an old AT disk, or a newer ATA 649 * drive, a removable media device, etc. 650 */ 651 652 struct wini *wn = w_wn; 653 struct command cmd; 654 int s; 655 u16_t w; 656 unsigned long size; 657 int prev_wakeup; 658 int r; 659 660 /* Try to identify the device. */ 661 cmd.ldh = wn->ldhpref; 662 cmd.command = ATA_IDENTIFY; 663 664 /* In testing mode, a drive will get ignored at the first timeout. */ 665 w_testing = 1; 666 667 /* Execute *_IDENTIFY with configured *_IDENTIFY timeout. */ 668 prev_wakeup = wakeup_ticks; 669 wakeup_ticks = w_identify_wakeup_ticks; 670 r = com_simple(&cmd); 671 672 if (r == OK && w_waitfor(STATUS_DRQ, STATUS_DRQ) && 673 !(wn->w_status & (STATUS_ERR|STATUS_WF))) { 674 675 /* Device information. */ 676 if ((s=sys_insw(wn->base_cmd + REG_DATA, SELF, tmp_buf, SECTOR_SIZE)) != OK) 677 panic("Call to sys_insw() failed: %d", s); 678 679 /* This is an ATA device. */ 680 wn->state |= SMART; 681 682 /* Preferred CHS translation mode. */ 683 wn->cylinders = id_word(1); 684 wn->heads = id_word(3); 685 wn->sectors = id_word(6); 686 size = (u32_t) wn->cylinders * wn->heads * wn->sectors; 687 688 w= id_word(ID_CAPABILITIES); 689 if ((w & ID_CAP_LBA) && size > 512L*1024*2) { 690 /* Drive is LBA capable and is big enough to trust it to 691 * not make a mess of it. 692 */ 693 wn->ldhpref |= LDH_LBA; 694 size = id_longword(60); 695 696 w= id_word(ID_CSS); 697 if (size < LBA48_CHECK_SIZE) 698 { 699 /* No need to check for LBA48 */ 700 } 701 else if (w & ID_CSS_LBA48) { 702 /* Drive is LBA48 capable (and LBA48 is turned on). */ 703 if (id_longword(102)) { 704 /* If no. of sectors doesn't fit in 32 bits, 705 * trunacte to this. So it's LBA32 for now. 706 * This can still address devices up to 2TB 707 * though. 708 */ 709 size = ULONG_MAX; 710 } else { 711 /* Actual number of sectors fits in 32 bits. */ 712 size = id_longword(100); 713 } 714 wn->lba48 = 1; 715 } 716 717 check_dma(wn); 718 } 719 } else if (cmd.command = ATAPI_IDENTIFY, 720 com_simple(&cmd) == OK && w_waitfor(STATUS_DRQ, STATUS_DRQ) && 721 !(wn->w_status & (STATUS_ERR|STATUS_WF))) { 722 /* An ATAPI device. */ 723 wn->state |= ATAPI; 724 725 /* Device information. */ 726 if ((s=sys_insw(wn->base_cmd + REG_DATA, SELF, tmp_buf, 512)) != OK) 727 panic("Call to sys_insw() failed: %d", s); 728 729 size = 0; /* Size set later. */ 730 check_dma(wn); 731 } else { 732 /* Not an ATA device; no translations, no special features. Don't 733 * touch it. 734 */ 735 wakeup_ticks = prev_wakeup; 736 w_testing = 0; 737 return(ERR); 738 } 739 740 /* Restore wakeup_ticks and unset testing mode. */ 741 wakeup_ticks = prev_wakeup; 742 w_testing = 0; 743 744 /* Size of the whole drive */ 745 wn->part[0].dv_size = (u64_t)size * SECTOR_SIZE; 746 747 /* Reset/calibrate (where necessary) */ 748 if (w_specify() != OK && w_specify() != OK) { 749 return(ERR); 750 } 751 752 wn->state |= IDENTIFIED; 753 return(OK); 754 } 755 756 /*===========================================================================* 757 * w_name * 758 *===========================================================================*/ 759 static char *w_name(void) 760 { 761 /* Return a name for the current device. */ 762 static char name[] = "AT0-D0"; 763 764 name[2] = '0' + w_instance; 765 name[5] = '0' + w_drive; 766 return name; 767 } 768 769 /*===========================================================================* 770 * w_io_test * 771 *===========================================================================*/ 772 static int w_io_test(void) 773 { 774 int save_dev; 775 int save_timeout, save_errors, save_wakeup; 776 iovec_t iov; 777 static char *buf; 778 ssize_t r; 779 780 #define BUFSIZE CD_SECTOR_SIZE 781 STATICINIT(buf, BUFSIZE); 782 783 iov.iov_addr = (vir_bytes) buf; 784 iov.iov_size = BUFSIZE; 785 save_dev = w_device; 786 787 /* Reduce timeout values for this test transaction. */ 788 save_timeout = timeout_usecs; 789 save_errors = max_errors; 790 save_wakeup = wakeup_ticks; 791 792 if (!w_standard_timeouts) { 793 timeout_usecs = 4000000; 794 wakeup_ticks = system_hz * 6; 795 max_errors = 3; 796 } 797 798 w_testing = 1; 799 800 /* Try I/O on the actual drive (not any (sub)partition). */ 801 r = w_transfer(w_drive * DEV_PER_DRIVE, FALSE /*do_write*/, 0, 802 SELF, &iov, 1, BDEV_NOFLAGS); 803 804 /* Switch back. */ 805 if (w_prepare(save_dev) == NULL) 806 panic("Couldn't switch back devices"); 807 808 /* Restore parameters. */ 809 timeout_usecs = save_timeout; 810 max_errors = save_errors; 811 wakeup_ticks = save_wakeup; 812 w_testing = 0; 813 814 /* Test if everything worked. */ 815 if (r != BUFSIZE) { 816 return ERR; 817 } 818 819 /* Everything worked. */ 820 return OK; 821 } 822 823 /*===========================================================================* 824 * w_specify * 825 *===========================================================================*/ 826 static int w_specify(void) 827 { 828 /* Routine to initialize the drive after boot or when a reset is needed. */ 829 830 struct wini *wn = w_wn; 831 struct command cmd; 832 833 if ((wn->state & DEAF) && w_reset() != OK) { 834 return(ERR); 835 } 836 837 if (!(wn->state & ATAPI)) { 838 /* Specify parameters: precompensation, number of heads and sectors. */ 839 cmd.precomp = 0; 840 cmd.count = wn->sectors; 841 cmd.ldh = w_wn->ldhpref | (wn->heads - 1); 842 cmd.command = CMD_SPECIFY; /* Specify some parameters */ 843 844 /* Output command block and see if controller accepts the parameters. */ 845 if (com_simple(&cmd) != OK) return(ERR); 846 847 if (!(wn->state & SMART)) { 848 /* Calibrate an old disk. */ 849 cmd.sector = 0; 850 cmd.cyl_lo = 0; 851 cmd.cyl_hi = 0; 852 cmd.ldh = w_wn->ldhpref; 853 cmd.command = CMD_RECALIBRATE; 854 855 if (com_simple(&cmd) != OK) return(ERR); 856 } 857 } 858 wn->state |= INITIALIZED; 859 return(OK); 860 } 861 862 /*===========================================================================* 863 * do_transfer * 864 *===========================================================================*/ 865 static int do_transfer(const struct wini *wn, unsigned int count, 866 unsigned int sector, unsigned int do_write, int do_dma) 867 { 868 struct command cmd; 869 unsigned int sector_high; 870 unsigned secspcyl = wn->heads * wn->sectors; 871 int do_lba48; 872 873 sector_high= 0; /* For future extensions */ 874 875 do_lba48= 0; 876 if (sector >= LBA48_CHECK_SIZE || sector_high != 0) 877 { 878 if (wn->lba48) 879 do_lba48= 1; 880 else if (sector > LBA_MAX_SIZE || sector_high != 0) 881 { 882 /* Strange sector count for LBA device */ 883 return EIO; 884 } 885 } 886 887 cmd.precomp = 0; 888 cmd.count = count; 889 if (do_dma) 890 { 891 cmd.command = do_write ? CMD_WRITE_DMA : CMD_READ_DMA; 892 } 893 else 894 cmd.command = do_write ? CMD_WRITE : CMD_READ; 895 896 if (do_lba48) { 897 if (do_dma) 898 { 899 cmd.command = (do_write ? 900 CMD_WRITE_DMA_EXT : CMD_READ_DMA_EXT); 901 } 902 else 903 { 904 cmd.command = (do_write ? 905 CMD_WRITE_EXT : CMD_READ_EXT); 906 } 907 cmd.count_prev= (count >> 8); 908 cmd.sector = (sector >> 0) & 0xFF; 909 cmd.cyl_lo = (sector >> 8) & 0xFF; 910 cmd.cyl_hi = (sector >> 16) & 0xFF; 911 cmd.sector_prev= (sector >> 24) & 0xFF; 912 cmd.cyl_lo_prev= (sector_high) & 0xFF; 913 cmd.cyl_hi_prev= (sector_high >> 8) & 0xFF; 914 cmd.ldh = wn->ldhpref; 915 916 return com_out_ext(&cmd); 917 } else if (wn->ldhpref & LDH_LBA) { 918 cmd.sector = (sector >> 0) & 0xFF; 919 cmd.cyl_lo = (sector >> 8) & 0xFF; 920 cmd.cyl_hi = (sector >> 16) & 0xFF; 921 cmd.ldh = wn->ldhpref | ((sector >> 24) & 0xF); 922 } else { 923 int cylinder, head, sec; 924 cylinder = sector / secspcyl; 925 head = (sector % secspcyl) / wn->sectors; 926 sec = sector % wn->sectors; 927 cmd.sector = sec + 1; 928 cmd.cyl_lo = cylinder & BYTE; 929 cmd.cyl_hi = (cylinder >> 8) & BYTE; 930 cmd.ldh = wn->ldhpref | head; 931 } 932 933 return com_out(&cmd); 934 } 935 936 static void stop_dma(const struct wini *wn) 937 { 938 int r; 939 940 /* Stop bus master operation */ 941 r= sys_outb(wn->base_dma + DMA_COMMAND, 0); 942 if (r != 0) panic("stop_dma: sys_outb failed: %d", r); 943 } 944 945 static void start_dma(const struct wini *wn, int do_write) 946 { 947 u32_t v; 948 int r; 949 950 /* Assume disk reads. Start DMA */ 951 v= DMA_CMD_START; 952 if (!do_write) 953 { 954 /* Disk reads generate PCI write cycles. */ 955 v |= DMA_CMD_WRITE; 956 } 957 r= sys_outb(wn->base_dma + DMA_COMMAND, v); 958 if (r != 0) panic("start_dma: sys_outb failed: %d", r); 959 } 960 961 static int error_dma(const struct wini *wn) 962 { 963 int r; 964 u32_t v; 965 966 #define DMAERR(msg) \ 967 printf("at_wini%ld: bad DMA: %s. Disabling DMA for drive %d.\n", \ 968 w_instance, msg, wn - wini); \ 969 printf("at_wini%ld: workaround: set %s=1 in boot monitor.\n", \ 970 w_instance, NO_DMA_VAR); \ 971 return 1; \ 972 973 r= sys_inb(wn->base_dma + DMA_STATUS, &v); 974 if (r != 0) panic("w_transfer: sys_inb failed: %d", r); 975 976 if (!wn->dma_intseen) { 977 /* DMA did not complete successfully */ 978 if (v & DMA_ST_BM_ACTIVE) { 979 DMAERR("DMA did not complete"); 980 } else if (v & DMA_ST_ERROR) { 981 DMAERR("DMA error"); 982 } else { 983 DMAERR("DMA buffer too small"); 984 } 985 } else if ((v & DMA_ST_BM_ACTIVE)) { 986 DMAERR("DMA buffer too large"); 987 } 988 989 return 0; 990 } 991 992 993 /*===========================================================================* 994 * w_transfer * 995 *===========================================================================*/ 996 static ssize_t w_transfer( 997 devminor_t minor, /* minor device to perform the transfer on */ 998 int do_write, /* read or write? */ 999 u64_t position, /* offset on device to read or write */ 1000 endpoint_t proc_nr, /* process doing the request */ 1001 iovec_t *iov, /* pointer to read or write request vector */ 1002 unsigned int nr_req, /* length of request vector */ 1003 int UNUSED(flags) /* transfer flags */ 1004 ) 1005 { 1006 struct wini *wn; 1007 iovec_t *iop, *iov_end = iov + nr_req; 1008 int r, s, errors, do_dma; 1009 unsigned long block; 1010 u32_t w_status; 1011 u64_t dv_size; 1012 unsigned int n, nbytes; 1013 unsigned dma_buf_offset; 1014 ssize_t total = 0; 1015 size_t addr_offset = 0; 1016 1017 if (w_prepare(minor) == NULL) return(ENXIO); 1018 1019 wn = w_wn; 1020 dv_size = w_dv->dv_size; 1021 1022 if (w_wn->state & ATAPI) { 1023 return atapi_transfer(do_write, position, proc_nr, iov, nr_req); 1024 } 1025 1026 /* Check disk address. */ 1027 if ((unsigned)(position % SECTOR_SIZE) != 0) return(EINVAL); 1028 1029 errors = 0; 1030 1031 while (nr_req > 0) { 1032 /* How many bytes to transfer? */ 1033 nbytes = 0; 1034 for (iop = iov; iop < iov_end; iop++) nbytes += iop->iov_size; 1035 if ((nbytes & SECTOR_MASK) != 0) return(EINVAL); 1036 1037 /* Which block on disk and how close to EOF? */ 1038 if (position >= dv_size) return(total); /* At EOF */ 1039 if (position + nbytes > dv_size) 1040 nbytes = (unsigned)(dv_size - position); 1041 block = (unsigned long)((w_dv->dv_base + position) / SECTOR_SIZE); 1042 1043 do_dma= wn->dma; 1044 1045 if (nbytes >= wn->max_count) { 1046 /* The drive can't do more then max_count at once. */ 1047 nbytes = wn->max_count; 1048 } 1049 1050 /* First check to see if a reinitialization is needed. */ 1051 if (!(wn->state & INITIALIZED) && w_specify() != OK) return(EIO); 1052 1053 if (do_dma) { 1054 stop_dma(wn); 1055 if (!setup_dma(&nbytes, proc_nr, iov, addr_offset, do_write)) { 1056 do_dma = 0; 1057 } 1058 #if 0 1059 printf("nbytes = %d\n", nbytes); 1060 #endif 1061 } 1062 1063 /* Tell the controller to transfer nbytes bytes. */ 1064 r = do_transfer(wn, (nbytes >> SECTOR_SHIFT), block, do_write, do_dma); 1065 1066 if (do_dma) 1067 start_dma(wn, do_write); 1068 1069 if (do_write) { 1070 /* The specs call for a 400 ns wait after issuing the command. 1071 * Reading the alternate status register is the suggested 1072 * way to implement this wait. 1073 */ 1074 if (sys_inb((wn->base_ctl+REG_CTL_ALTSTAT), &w_status) != OK) 1075 panic("couldn't get status"); 1076 } 1077 1078 if (do_dma) { 1079 /* Wait for the interrupt, check DMA status and optionally 1080 * copy out. 1081 */ 1082 1083 wn->dma_intseen = 0; 1084 if ((r = at_intr_wait()) != OK) 1085 { 1086 /* Don't retry if sector marked bad or too many 1087 * errors. 1088 */ 1089 if (r == ERR_BAD_SECTOR || ++errors == max_errors) { 1090 w_command = CMD_IDLE; 1091 return(EIO); 1092 } 1093 continue; 1094 } 1095 1096 /* Wait for DMA_ST_INT to get set */ 1097 if (!wn->dma_intseen) { 1098 if(w_waitfor_dma(DMA_ST_INT, DMA_ST_INT)) 1099 wn->dma_intseen = 1; 1100 } 1101 1102 if (error_dma(wn)) { 1103 wn->dma = 0; 1104 continue; 1105 } 1106 1107 stop_dma(wn); 1108 1109 dma_buf_offset= 0; 1110 while (r == OK && nbytes > 0) 1111 { 1112 n= iov->iov_size; 1113 if (n > nbytes) 1114 n= nbytes; 1115 1116 /* Book the bytes successfully transferred. */ 1117 nbytes -= n; 1118 position= position + n; 1119 total += n; 1120 addr_offset += n; 1121 if ((iov->iov_size -= n) == 0) { 1122 iov++; nr_req--; addr_offset = 0; 1123 } 1124 dma_buf_offset += n; 1125 } 1126 } 1127 1128 while (r == OK && nbytes > 0) { 1129 /* For each sector, wait for an interrupt and fetch the data 1130 * (read), or supply data to the controller and wait for an 1131 * interrupt (write). 1132 */ 1133 1134 if (!do_write) { 1135 /* First an interrupt, then data. */ 1136 if ((r = at_intr_wait()) != OK) { 1137 /* An error, send data to the bit bucket. */ 1138 if (w_wn->w_status & STATUS_DRQ) { 1139 if ((s=sys_insw(wn->base_cmd+REG_DATA, 1140 SELF, tmp_buf, 1141 SECTOR_SIZE)) != OK) { 1142 panic("Call to sys_insw() failed: %d", s); 1143 } 1144 } 1145 break; 1146 } 1147 } 1148 1149 /* Wait for busy to clear. */ 1150 if (!w_waitfor(STATUS_BSY, 0)) { r = ERR; break; } 1151 1152 /* Wait for data transfer requested. */ 1153 if (!w_waitfor(STATUS_DRQ, STATUS_DRQ)) { r = ERR; break; } 1154 1155 /* Copy bytes to or from the device's buffer. */ 1156 if (!do_write) { 1157 if(proc_nr != SELF) { 1158 s=sys_safe_insw(wn->base_cmd + REG_DATA, proc_nr, 1159 (void *) (iov->iov_addr), addr_offset, 1160 SECTOR_SIZE); 1161 } else { 1162 s=sys_insw(wn->base_cmd + REG_DATA, proc_nr, 1163 (void *) (iov->iov_addr + addr_offset), 1164 SECTOR_SIZE); 1165 } 1166 if(s != OK) { 1167 panic("Call to sys_insw() failed: %d", s); 1168 } 1169 } else { 1170 if(proc_nr != SELF) { 1171 s=sys_safe_outsw(wn->base_cmd + REG_DATA, proc_nr, 1172 (void *) (iov->iov_addr), addr_offset, 1173 SECTOR_SIZE); 1174 } else { 1175 s=sys_outsw(wn->base_cmd + REG_DATA, proc_nr, 1176 (void *) (iov->iov_addr + addr_offset), 1177 SECTOR_SIZE); 1178 } 1179 1180 if(s != OK) { 1181 panic("Call to sys_outsw() failed: %d", s); 1182 } 1183 1184 /* Data sent, wait for an interrupt. */ 1185 if ((r = at_intr_wait()) != OK) break; 1186 } 1187 1188 /* Book the bytes successfully transferred. */ 1189 nbytes -= SECTOR_SIZE; 1190 position = position + SECTOR_SIZE; 1191 addr_offset += SECTOR_SIZE; 1192 total += SECTOR_SIZE; 1193 if ((iov->iov_size -= SECTOR_SIZE) == 0) { 1194 iov++; 1195 nr_req--; 1196 addr_offset = 0; 1197 } 1198 } 1199 1200 /* Any errors? */ 1201 if (r != OK) { 1202 /* Don't retry if sector marked bad or too many errors. */ 1203 if (r == ERR_BAD_SECTOR || ++errors == max_errors) { 1204 w_command = CMD_IDLE; 1205 return(EIO); 1206 } 1207 } 1208 } 1209 1210 w_command = CMD_IDLE; 1211 return(total); 1212 } 1213 1214 /*===========================================================================* 1215 * com_out * 1216 *===========================================================================*/ 1217 static int com_out(cmd) 1218 struct command *cmd; /* Command block */ 1219 { 1220 /* Output the command block to the winchester controller and return status */ 1221 1222 struct wini *wn = w_wn; 1223 unsigned base_cmd = wn->base_cmd; 1224 unsigned base_ctl = wn->base_ctl; 1225 pvb_pair_t outbyte[7]; /* vector for sys_voutb() */ 1226 int s; /* status for sys_(v)outb() */ 1227 1228 if (w_wn->state & IGNORING) return ERR; 1229 1230 if (!w_waitfor(STATUS_BSY, 0)) { 1231 printf("%s: controller not ready\n", w_name()); 1232 return(ERR); 1233 } 1234 1235 /* Select drive. */ 1236 if ((s=sys_outb(base_cmd + REG_LDH, cmd->ldh)) != OK) 1237 panic("Couldn't write register to select drive: %d", s); 1238 1239 if (!w_waitfor(STATUS_BSY, 0)) { 1240 printf("%s: com_out: drive not ready\n", w_name()); 1241 return(ERR); 1242 } 1243 1244 /* Schedule a wakeup call, some controllers are flaky. This is done with a 1245 * synchronous alarm. If a timeout occurs a notify from CLOCK is sent, so that 1246 * w_intr_wait() can call w_timeout() in case the controller was not able to 1247 * execute the command. Leftover timeouts are simply ignored by the main loop. 1248 */ 1249 sys_setalarm(wakeup_ticks, 0); 1250 1251 wn->w_status = STATUS_ADMBSY; 1252 w_command = cmd->command; 1253 pv_set(outbyte[0], base_ctl + REG_CTL, wn->heads >= 8 ? CTL_EIGHTHEADS : 0); 1254 pv_set(outbyte[1], base_cmd + REG_PRECOMP, cmd->precomp); 1255 pv_set(outbyte[2], base_cmd + REG_COUNT, cmd->count); 1256 pv_set(outbyte[3], base_cmd + REG_SECTOR, cmd->sector); 1257 pv_set(outbyte[4], base_cmd + REG_CYL_LO, cmd->cyl_lo); 1258 pv_set(outbyte[5], base_cmd + REG_CYL_HI, cmd->cyl_hi); 1259 pv_set(outbyte[6], base_cmd + REG_COMMAND, cmd->command); 1260 if ((s=sys_voutb(outbyte,7)) != OK) 1261 panic("Couldn't write registers with sys_voutb(): %d", s); 1262 return(OK); 1263 } 1264 1265 /*===========================================================================* 1266 * com_out_ext * 1267 *===========================================================================*/ 1268 static int com_out_ext(cmd) 1269 struct command *cmd; /* Command block */ 1270 { 1271 /* Output the command block to the winchester controller and return status */ 1272 1273 struct wini *wn = w_wn; 1274 unsigned base_cmd = wn->base_cmd; 1275 unsigned base_ctl = wn->base_ctl; 1276 pvb_pair_t outbyte[11]; /* vector for sys_voutb() */ 1277 int s; /* status for sys_(v)outb() */ 1278 1279 if (w_wn->state & IGNORING) return ERR; 1280 1281 if (!w_waitfor(STATUS_BSY, 0)) { 1282 printf("%s: controller not ready\n", w_name()); 1283 return(ERR); 1284 } 1285 1286 /* Select drive. */ 1287 if ((s=sys_outb(base_cmd + REG_LDH, cmd->ldh)) != OK) 1288 panic("Couldn't write register to select drive: %d", s); 1289 1290 if (!w_waitfor(STATUS_BSY, 0)) { 1291 printf("%s: com_out: drive not ready\n", w_name()); 1292 return(ERR); 1293 } 1294 1295 /* Schedule a wakeup call, some controllers are flaky. This is done with a 1296 * synchronous alarm. If a timeout occurs a notify from CLOCK is sent, so that 1297 * w_intr_wait() can call w_timeout() in case the controller was not able to 1298 * execute the command. Leftover timeouts are simply ignored by the main loop. 1299 */ 1300 sys_setalarm(wakeup_ticks, 0); 1301 1302 wn->w_status = STATUS_ADMBSY; 1303 w_command = cmd->command; 1304 pv_set(outbyte[0], base_ctl + REG_CTL, 0); 1305 pv_set(outbyte[1], base_cmd + REG_COUNT, cmd->count_prev); 1306 pv_set(outbyte[2], base_cmd + REG_SECTOR, cmd->sector_prev); 1307 pv_set(outbyte[3], base_cmd + REG_CYL_LO, cmd->cyl_lo_prev); 1308 pv_set(outbyte[4], base_cmd + REG_CYL_HI, cmd->cyl_hi_prev); 1309 pv_set(outbyte[5], base_cmd + REG_COUNT, cmd->count); 1310 pv_set(outbyte[6], base_cmd + REG_SECTOR, cmd->sector); 1311 pv_set(outbyte[7], base_cmd + REG_CYL_LO, cmd->cyl_lo); 1312 pv_set(outbyte[8], base_cmd + REG_CYL_HI, cmd->cyl_hi); 1313 pv_set(outbyte[9], base_cmd + REG_COMMAND, cmd->command); 1314 if ((s=sys_voutb(outbyte, 10)) != OK) 1315 panic("Couldn't write registers with sys_voutb(): %d", s); 1316 1317 return(OK); 1318 } 1319 /*===========================================================================* 1320 * setup_dma * 1321 *===========================================================================*/ 1322 static int setup_dma( 1323 unsigned *sizep, 1324 endpoint_t proc_nr, 1325 iovec_t *iov, 1326 size_t addr_offset, 1327 int UNUSED(do_write) 1328 ) 1329 { 1330 phys_bytes user_phys; 1331 unsigned n, offset, size; 1332 int i, j, r; 1333 u32_t v; 1334 struct wini *wn = w_wn; 1335 1336 /* First try direct scatter/gather to the supplied buffers */ 1337 size= *sizep; 1338 i= 0; /* iov index */ 1339 j= 0; /* prdt index */ 1340 offset= 0; /* Offset in current iov */ 1341 1342 #if VERBOSE_DMA 1343 printf("at_wini: setup_dma: proc_nr %d\n", proc_nr); 1344 #endif 1345 1346 while (size > 0) 1347 { 1348 #if VERBOSE_DMA 1349 printf( 1350 "at_wini: setup_dma: iov[%d]: addr 0x%lx, size %ld offset %d, size %d\n", 1351 i, iov[i].iov_addr, iov[i].iov_size, offset, size); 1352 #endif 1353 1354 n= iov[i].iov_size-offset; 1355 if (n > size) 1356 n= size; 1357 if (n == 0 || (n & 1)) 1358 panic("bad size in iov: 0x%lx", iov[i].iov_size); 1359 if(proc_nr != SELF) { 1360 r= sys_umap(proc_nr, VM_GRANT, iov[i].iov_addr, n, 1361 &user_phys); 1362 if (r != 0) 1363 panic("can't map user buffer (VM_GRANT): %d", r); 1364 user_phys += offset + addr_offset; 1365 } else { 1366 r= sys_umap(proc_nr, VM_D, 1367 iov[i].iov_addr+offset+addr_offset, n, 1368 &user_phys); 1369 if (r != 0) 1370 panic("can't map user buffer (VM_D): %d", r); 1371 } 1372 if (user_phys & 1) 1373 { 1374 /* Buffer is not aligned */ 1375 printf("setup_dma: user buffer is not aligned\n"); 1376 return 0; 1377 } 1378 1379 /* vector is not allowed to cross a 64K boundary */ 1380 if (user_phys/0x10000 != (user_phys+n-1)/0x10000) 1381 n= ((user_phys/0x10000)+1)*0x10000 - user_phys; 1382 1383 /* vector is not allowed to be bigger than 64K, but we get that 1384 * for free. 1385 */ 1386 1387 if (j >= N_PRDTE) 1388 { 1389 /* Too many entries */ 1390 printf("setup_dma: user buffer has too many entries\n"); 1391 return 0; 1392 } 1393 1394 prdt[j].prdte_base= user_phys; 1395 prdt[j].prdte_count= n; 1396 prdt[j].prdte_reserved= 0; 1397 prdt[j].prdte_flags= 0; 1398 j++; 1399 1400 offset += n; 1401 if (offset >= iov[i].iov_size) 1402 { 1403 i++; 1404 offset= 0; 1405 addr_offset= 0; 1406 } 1407 1408 size -= n; 1409 } 1410 1411 if (j <= 0 || j > N_PRDTE) 1412 panic("bad prdt index: %d", j); 1413 prdt[j-1].prdte_flags |= PRDTE_FL_EOT; 1414 1415 #if VERBOSE_DMA 1416 printf("dma not bad\n"); 1417 for (i= 0; i<j; i++) { 1418 printf("prdt[%d]: base 0x%lx, size %d, flags 0x%x\n", 1419 i, prdt[i].prdte_base, prdt[i].prdte_count, 1420 prdt[i].prdte_flags); 1421 } 1422 #endif 1423 1424 /* Verify that the bus master is not active */ 1425 r= sys_inb(wn->base_dma + DMA_STATUS, &v); 1426 if (r != 0) panic("setup_dma: sys_inb failed: %d", r); 1427 if (v & DMA_ST_BM_ACTIVE) 1428 panic("Bus master IDE active"); 1429 1430 if (prdt_phys & 3) 1431 panic("prdt not aligned: 0x%lx", prdt_phys); 1432 r= sys_outl(wn->base_dma + DMA_PRDTP, prdt_phys); 1433 if (r != 0) panic("setup_dma: sys_outl failed: %d", r); 1434 1435 /* Clear interrupt and error flags */ 1436 r= sys_outb(wn->base_dma + DMA_STATUS, DMA_ST_INT | DMA_ST_ERROR); 1437 if (r != 0) panic("setup_dma: sys_outb failed: %d", r); 1438 1439 return 1; 1440 } 1441 1442 1443 /*===========================================================================* 1444 * w_need_reset * 1445 *===========================================================================*/ 1446 static void w_need_reset(void) 1447 { 1448 /* The controller needs to be reset. */ 1449 struct wini *wn; 1450 1451 for (wn = wini; wn < &wini[MAX_DRIVES]; wn++) { 1452 if (wn->base_cmd == w_wn->base_cmd) { 1453 wn->state |= DEAF; 1454 wn->state &= ~INITIALIZED; 1455 } 1456 } 1457 } 1458 1459 /*===========================================================================* 1460 * w_do_close * 1461 *===========================================================================*/ 1462 static int w_do_close(devminor_t minor) 1463 { 1464 /* Device close: Release a device. */ 1465 if (w_prepare(minor) == NULL) 1466 return(ENXIO); 1467 w_wn->open_ct--; 1468 if (w_wn->open_ct == 0 && (w_wn->state & ATAPI)) atapi_close(); 1469 return(OK); 1470 } 1471 1472 /*===========================================================================* 1473 * com_simple * 1474 *===========================================================================*/ 1475 static int com_simple(cmd) 1476 struct command *cmd; /* Command block */ 1477 { 1478 /* A simple controller command, only one interrupt and no data-out phase. */ 1479 int r; 1480 1481 if (w_wn->state & IGNORING) return ERR; 1482 1483 if ((r = com_out(cmd)) == OK) r = at_intr_wait(); 1484 w_command = CMD_IDLE; 1485 return(r); 1486 } 1487 1488 /*===========================================================================* 1489 * w_timeout * 1490 *===========================================================================*/ 1491 static void w_timeout(void) 1492 { 1493 struct wini *wn = w_wn; 1494 1495 switch (w_command) { 1496 case CMD_IDLE: 1497 break; /* fine */ 1498 case CMD_READ: 1499 case CMD_READ_EXT: 1500 case CMD_WRITE: 1501 case CMD_WRITE_EXT: 1502 /* Impossible, but not on PC's: The controller does not respond. */ 1503 1504 /* Limiting multisector I/O seems to help. */ 1505 if (wn->max_count > 8 * SECTOR_SIZE) { 1506 wn->max_count = 8 * SECTOR_SIZE; 1507 } else { 1508 wn->max_count = SECTOR_SIZE; 1509 } 1510 /*FALL THROUGH*/ 1511 default: 1512 /* Some other command. */ 1513 if (w_testing) wn->state |= IGNORING; /* Kick out this drive. */ 1514 else if (!w_silent) printf("%s: timeout on command 0x%02x\n", 1515 w_name(), w_command); 1516 w_need_reset(); 1517 wn->w_status = 0; 1518 } 1519 } 1520 1521 /*===========================================================================* 1522 * w_reset * 1523 *===========================================================================*/ 1524 static int w_reset(void) 1525 { 1526 /* Issue a reset to the controller. This is done after any catastrophe, 1527 * like the controller refusing to respond. 1528 */ 1529 int s; 1530 struct wini *wn = w_wn; 1531 1532 /* Don't bother if this drive is forgotten. */ 1533 if (w_wn->state & IGNORING) return ERR; 1534 1535 /* Wait for any internal drive recovery. */ 1536 tickdelay(RECOVERY_TICKS); 1537 1538 /* Strobe reset bit */ 1539 if ((s=sys_outb(wn->base_ctl + REG_CTL, CTL_RESET)) != OK) 1540 panic("Couldn't strobe reset bit: %d", s); 1541 tickdelay(DELAY_TICKS); 1542 if ((s=sys_outb(wn->base_ctl + REG_CTL, 0)) != OK) 1543 panic("Couldn't strobe reset bit: %d", s); 1544 tickdelay(DELAY_TICKS); 1545 1546 /* Wait for controller ready */ 1547 if (!w_waitfor(STATUS_BSY, 0)) { 1548 printf("%s: reset failed, drive busy\n", w_name()); 1549 return(ERR); 1550 } 1551 1552 /* The error register should be checked now, but some drives mess it up. */ 1553 1554 for (wn = wini; wn < &wini[MAX_DRIVES]; wn++) { 1555 if (wn->base_cmd == w_wn->base_cmd) { 1556 wn->state &= ~DEAF; 1557 if (w_wn->native) { 1558 /* Make sure irq is actually enabled.. */ 1559 sys_irqenable(&w_wn->irq_hook_id); 1560 } 1561 } 1562 } 1563 1564 return(OK); 1565 } 1566 1567 /*===========================================================================* 1568 * w_intr_wait * 1569 *===========================================================================*/ 1570 static void w_intr_wait(void) 1571 { 1572 /* Wait for a task completion interrupt. */ 1573 1574 int r; 1575 u32_t w_status; 1576 message m; 1577 int ipc_status; 1578 1579 if (w_wn->state & IDENTIFIED) { 1580 /* Wait for an interrupt that sets w_status to "not busy". 1581 * (w_timeout() also clears w_status.) 1582 */ 1583 while (w_wn->w_status & (STATUS_ADMBSY|STATUS_BSY)) { 1584 if ((r=driver_receive(ANY, &m, &ipc_status)) != OK) 1585 panic("driver_receive failed: %d", r); 1586 if (is_ipc_notify(ipc_status)) { 1587 switch (_ENDPOINT_P(m.m_source)) { 1588 case CLOCK: 1589 /* Timeout. */ 1590 w_timeout(); /* a.o. set w_status */ 1591 break; 1592 case HARDWARE: 1593 /* Interrupt. */ 1594 r= sys_inb(w_wn->base_cmd + 1595 REG_STATUS, &w_status); 1596 if (r != 0) 1597 panic("sys_inb failed: %d", r); 1598 w_wn->w_status= w_status; 1599 w_hw_int(m.m_notify.interrupts); 1600 break; 1601 default: 1602 /* 1603 * unhandled message. queue it and 1604 * handle it in the blockdriver loop. 1605 */ 1606 blockdriver_mq_queue(&m, ipc_status); 1607 } 1608 } 1609 else { 1610 /* 1611 * unhandled message. queue it and handle it in the 1612 * blockdriver loop. 1613 */ 1614 blockdriver_mq_queue(&m, ipc_status); 1615 } 1616 } 1617 } else { 1618 /* Device not yet identified; use polling. */ 1619 (void) w_waitfor(STATUS_BSY, 0); 1620 } 1621 } 1622 1623 /*===========================================================================* 1624 * at_intr_wait * 1625 *===========================================================================*/ 1626 static int at_intr_wait(void) 1627 { 1628 /* Wait for an interrupt, study the status bits and return error/success. */ 1629 int r, s; 1630 u32_t inbval; 1631 1632 w_intr_wait(); 1633 if ((w_wn->w_status & (STATUS_BSY | STATUS_WF | STATUS_ERR)) == 0) { 1634 r = OK; 1635 } else { 1636 if ((s=sys_inb(w_wn->base_cmd + REG_ERROR, &inbval)) != OK) 1637 panic("Couldn't read register: %d", s); 1638 if ((w_wn->w_status & STATUS_ERR) && (inbval & ERROR_BB)) { 1639 r = ERR_BAD_SECTOR; /* sector marked bad, retries won't help */ 1640 } else { 1641 r = ERR; /* any other error */ 1642 } 1643 } 1644 w_wn->w_status |= STATUS_ADMBSY; /* assume still busy with I/O */ 1645 return(r); 1646 } 1647 1648 /*===========================================================================* 1649 * w_waitfor * 1650 *===========================================================================*/ 1651 static int w_waitfor(mask, value) 1652 int mask; /* status mask */ 1653 int value; /* required status */ 1654 { 1655 /* Wait until controller is in the required state. Return zero on timeout. 1656 */ 1657 u32_t w_status; 1658 spin_t spin; 1659 int s; 1660 1661 SPIN_FOR(&spin, timeout_usecs) { 1662 if ((s=sys_inb(w_wn->base_cmd + REG_STATUS, &w_status)) != OK) 1663 panic("Couldn't read register: %d", s); 1664 w_wn->w_status= w_status; 1665 if ((w_wn->w_status & mask) == value) { 1666 return 1; 1667 } 1668 } 1669 1670 w_need_reset(); /* controller gone deaf */ 1671 return(0); 1672 } 1673 1674 /*===========================================================================* 1675 * w_waitfor_dma * 1676 *===========================================================================*/ 1677 static int w_waitfor_dma(mask, value) 1678 unsigned int mask; /* status mask */ 1679 unsigned value; /* required status */ 1680 { 1681 /* Wait until controller is in the required state. Return zero on timeout. 1682 */ 1683 u32_t w_status; 1684 spin_t spin; 1685 int s; 1686 1687 SPIN_FOR(&spin, timeout_usecs) { 1688 if ((s=sys_inb(w_wn->base_dma + DMA_STATUS, &w_status)) != OK) 1689 panic("Couldn't read register: %d", s); 1690 if ((w_status & mask) == value) { 1691 return 1; 1692 } 1693 } 1694 1695 return(0); 1696 } 1697 1698 /*===========================================================================* 1699 * w_geometry * 1700 *===========================================================================*/ 1701 static void w_geometry(devminor_t minor, struct part_geom *entry) 1702 { 1703 struct wini *wn; 1704 1705 if (w_prepare(minor) == NULL) return; 1706 1707 wn = w_wn; 1708 1709 if (wn->state & ATAPI) { /* Make up some numbers. */ 1710 entry->cylinders = (unsigned long)(wn->part[0].dv_size / SECTOR_SIZE) / (64*32); 1711 entry->heads = 64; 1712 entry->sectors = 32; 1713 } else { /* Return logical geometry. */ 1714 entry->cylinders = wn->cylinders; 1715 entry->heads = wn->heads; 1716 entry->sectors = wn->sectors; 1717 while (entry->cylinders > 1024) { 1718 entry->heads *= 2; 1719 entry->cylinders /= 2; 1720 } 1721 } 1722 } 1723 1724 /*===========================================================================* 1725 * atapi_open * 1726 *===========================================================================*/ 1727 static int atapi_open(void) 1728 { 1729 /* Should load and lock the device and obtain its size. For now just set the 1730 * size of the device to something big. What is really needed is a generic 1731 * SCSI layer that does all this stuff for ATAPI and SCSI devices (kjb). (XXX) 1732 * .."something big" is now the maximum size of the largest type of DVD. 1733 */ 1734 w_wn->part[0].dv_size = (u64_t)(8500L*1024) * 1024; 1735 return(OK); 1736 } 1737 1738 /*===========================================================================* 1739 * atapi_close * 1740 *===========================================================================*/ 1741 static void atapi_close(void) 1742 { 1743 /* Should unlock the device. For now do nothing. (XXX) */ 1744 } 1745 1746 static void sense_request(void) 1747 { 1748 int r, i; 1749 static u8_t sense[100], packet[ATAPI_PACKETSIZE]; 1750 1751 packet[0] = SCSI_SENSE; 1752 packet[1] = 0; 1753 packet[2] = 0; 1754 packet[3] = 0; 1755 packet[4] = SENSE_PACKETSIZE; 1756 packet[5] = 0; 1757 packet[7] = 0; 1758 packet[8] = 0; 1759 packet[9] = 0; 1760 packet[10] = 0; 1761 packet[11] = 0; 1762 1763 for(i = 0; i < SENSE_PACKETSIZE; i++) sense[i] = 0xff; 1764 r = atapi_sendpacket(packet, SENSE_PACKETSIZE, 0); 1765 if (r != OK) { printf("request sense command failed\n"); return; } 1766 if (atapi_intr_wait(0, 0) <= 0) { printf("WARNING: request response failed\n"); } 1767 1768 if (sys_insw(w_wn->base_cmd + REG_DATA, SELF, (void *) sense, SENSE_PACKETSIZE) != OK) 1769 printf("WARNING: sense reading failed\n"); 1770 1771 printf("sense data:"); 1772 for(i = 0; i < SENSE_PACKETSIZE; i++) printf(" %02x", sense[i]); 1773 printf("\n"); 1774 } 1775 1776 /*===========================================================================* 1777 * atapi_transfer * 1778 *===========================================================================*/ 1779 static int atapi_transfer( 1780 int do_write, /* read or write? */ 1781 u64_t position, /* offset on device to read or write */ 1782 endpoint_t proc_nr, /* process doing the request */ 1783 iovec_t *iov, /* pointer to read or write request vector */ 1784 unsigned int nr_req /* length of request vector */ 1785 ) 1786 { 1787 struct wini *wn = w_wn; 1788 iovec_t *iop, *iov_end = iov + nr_req; 1789 int r, s, errors, fresh; 1790 u64_t pos; 1791 unsigned long block; 1792 u64_t dv_size = w_dv->dv_size; 1793 unsigned nbytes, nblocks, before, chunk; 1794 static u8_t packet[ATAPI_PACKETSIZE]; 1795 size_t addr_offset = 0; 1796 int dmabytes = 0, piobytes = 0; 1797 ssize_t total = 0; 1798 1799 if (do_write) return(EINVAL); 1800 1801 errors = fresh = 0; 1802 1803 while (nr_req > 0 && !fresh) { 1804 int do_dma = wn->dma && w_atapi_dma; 1805 /* The Minix block size is smaller than the CD block size, so we 1806 * may have to read extra before or after the good data. 1807 */ 1808 pos = w_dv->dv_base + position; 1809 block = (unsigned long)(pos / CD_SECTOR_SIZE); 1810 before = (unsigned)(pos % CD_SECTOR_SIZE); 1811 1812 if (before) 1813 do_dma = 0; 1814 1815 /* How many bytes to transfer? */ 1816 nbytes = 0; 1817 for (iop = iov; iop < iov_end; iop++) { 1818 nbytes += iop->iov_size; 1819 if (iop->iov_size % CD_SECTOR_SIZE) 1820 do_dma = 0; 1821 } 1822 1823 /* Data comes in as words, so we have to enforce even byte counts. */ 1824 if ((before | nbytes) & 1) return(EINVAL); 1825 1826 /* Which block on disk and how close to EOF? */ 1827 if (position >= dv_size) return(total); /* At EOF */ 1828 if (position + nbytes > dv_size) 1829 nbytes = (unsigned)(dv_size - position); 1830 1831 nblocks = (before + nbytes + CD_SECTOR_SIZE - 1) / CD_SECTOR_SIZE; 1832 1833 /* First check to see if a reinitialization is needed. */ 1834 if (!(wn->state & INITIALIZED) && w_specify() != OK) return(EIO); 1835 1836 /* Build an ATAPI command packet. */ 1837 packet[0] = SCSI_READ10; 1838 packet[1] = 0; 1839 packet[2] = (block >> 24) & 0xFF; 1840 packet[3] = (block >> 16) & 0xFF; 1841 packet[4] = (block >> 8) & 0xFF; 1842 packet[5] = (block >> 0) & 0xFF; 1843 packet[6] = 0; 1844 packet[7] = (nblocks >> 8) & 0xFF; 1845 packet[8] = (nblocks >> 0) & 0xFF; 1846 packet[9] = 0; 1847 packet[10] = 0; 1848 packet[11] = 0; 1849 1850 if(do_dma) { 1851 stop_dma(wn); 1852 if (!setup_dma(&nbytes, proc_nr, iov, addr_offset, 0)) { 1853 do_dma = 0; 1854 } else if(nbytes != nblocks * CD_SECTOR_SIZE) { 1855 stop_dma(wn); 1856 do_dma = 0; 1857 } 1858 } 1859 1860 /* Tell the controller to execute the packet command. */ 1861 r = atapi_sendpacket(packet, nblocks * CD_SECTOR_SIZE, do_dma); 1862 if (r != OK) goto err; 1863 1864 if(do_dma) { 1865 wn->dma_intseen = 0; 1866 start_dma(wn, 0); 1867 w_intr_wait(); 1868 if(!wn->dma_intseen) { 1869 if(w_waitfor_dma(DMA_ST_INT, DMA_ST_INT)) { 1870 wn->dma_intseen = 1; 1871 } 1872 } 1873 if(error_dma(wn)) { 1874 printf("Disabling DMA (ATAPI)\n"); 1875 wn->dma = 0; 1876 } else { 1877 dmabytes += nbytes; 1878 while (nbytes > 0) { 1879 chunk = nbytes; 1880 1881 if (chunk > iov->iov_size) 1882 chunk = iov->iov_size; 1883 position = position + chunk; 1884 nbytes -= chunk; 1885 total += chunk; 1886 if ((iov->iov_size -= chunk) == 0) { 1887 iov++; 1888 nr_req--; 1889 } 1890 } 1891 } 1892 continue; 1893 } 1894 1895 /* Read chunks of data. */ 1896 while ((r = atapi_intr_wait(do_dma, nblocks * CD_SECTOR_SIZE)) > 0) { 1897 size_t count; 1898 count = r; 1899 1900 while (before > 0 && count > 0) { /* Discard before. */ 1901 chunk = before; 1902 if (chunk > count) chunk = count; 1903 if (chunk > DMA_BUF_SIZE) chunk = DMA_BUF_SIZE; 1904 if ((s=sys_insw(wn->base_cmd + REG_DATA, 1905 SELF, tmp_buf, chunk)) != OK) 1906 panic("Call to sys_insw() failed: %d", s); 1907 before -= chunk; 1908 count -= chunk; 1909 } 1910 1911 while (nbytes > 0 && count > 0) { /* Requested data. */ 1912 chunk = nbytes; 1913 if (chunk > count) chunk = count; 1914 if (chunk > iov->iov_size) chunk = iov->iov_size; 1915 if(proc_nr != SELF) { 1916 s=sys_safe_insw(wn->base_cmd + REG_DATA, 1917 proc_nr, (void *) iov->iov_addr, 1918 addr_offset, chunk); 1919 } else { 1920 s=sys_insw(wn->base_cmd + REG_DATA, proc_nr, 1921 (void *) (iov->iov_addr + addr_offset), 1922 chunk); 1923 } 1924 if (s != OK) 1925 panic("Call to sys_insw() failed: %d", s); 1926 position = position + chunk; 1927 nbytes -= chunk; 1928 count -= chunk; 1929 addr_offset += chunk; 1930 piobytes += chunk; 1931 fresh = 0; 1932 total += chunk; 1933 if ((iov->iov_size -= chunk) == 0) { 1934 iov++; 1935 nr_req--; 1936 fresh = 1; /* new element is optional */ 1937 addr_offset = 0; 1938 } 1939 1940 } 1941 1942 while (count > 0) { /* Excess data. */ 1943 chunk = count; 1944 if (chunk > DMA_BUF_SIZE) chunk = DMA_BUF_SIZE; 1945 if ((s=sys_insw(wn->base_cmd + REG_DATA, 1946 SELF, tmp_buf, chunk)) != OK) 1947 panic("Call to sys_insw() failed: %d", s); 1948 count -= chunk; 1949 } 1950 } 1951 1952 if (r < 0) { 1953 err: /* Don't retry if too many errors. */ 1954 if (atapi_debug) sense_request(); 1955 if (++errors == max_errors) { 1956 w_command = CMD_IDLE; 1957 if (atapi_debug) printf("giving up (%d)\n", errors); 1958 return(EIO); 1959 } 1960 if (atapi_debug) printf("retry (%d)\n", errors); 1961 } 1962 } 1963 1964 #if 0 1965 if(dmabytes) printf("dmabytes %d ", dmabytes); 1966 if(piobytes) printf("piobytes %d", piobytes); 1967 if(dmabytes || piobytes) printf("\n"); 1968 #endif 1969 1970 w_command = CMD_IDLE; 1971 return(total); 1972 } 1973 1974 /*===========================================================================* 1975 * atapi_sendpacket * 1976 *===========================================================================*/ 1977 static int atapi_sendpacket(packet, cnt, do_dma) 1978 u8_t *packet; 1979 unsigned cnt; 1980 int do_dma; 1981 { 1982 /* Send an Atapi Packet Command */ 1983 struct wini *wn = w_wn; 1984 pvb_pair_t outbyte[6]; /* vector for sys_voutb() */ 1985 int s; 1986 1987 if (wn->state & IGNORING) return ERR; 1988 1989 /* Select Master/Slave drive */ 1990 if ((s=sys_outb(wn->base_cmd + REG_DRIVE, wn->ldhpref)) != OK) 1991 panic("Couldn't select master/ slave drive: %d", s); 1992 1993 if (!w_waitfor(STATUS_BSY | STATUS_DRQ, 0)) { 1994 printf("%s: atapi_sendpacket: drive not ready\n", w_name()); 1995 return(ERR); 1996 } 1997 1998 /* Schedule a wakeup call, some controllers are flaky. This is done with 1999 * a synchronous alarm. If a timeout occurs a SYN_ALARM message is sent 2000 * from HARDWARE, so that w_intr_wait() can call w_timeout() in case the 2001 * controller was not able to execute the command. Leftover timeouts are 2002 * simply ignored by the main loop. 2003 */ 2004 sys_setalarm(wakeup_ticks, 0); 2005 2006 if (cnt > 0xFFFE) cnt = 0xFFFE; /* Max data per interrupt. */ 2007 2008 w_command = ATAPI_PACKETCMD; 2009 pv_set(outbyte[0], wn->base_cmd + REG_FEAT, do_dma ? FEAT_DMA : 0); 2010 pv_set(outbyte[1], wn->base_cmd + REG_IRR, 0); 2011 pv_set(outbyte[2], wn->base_cmd + REG_SAMTAG, 0); 2012 pv_set(outbyte[3], wn->base_cmd + REG_CNT_LO, (cnt >> 0) & 0xFF); 2013 pv_set(outbyte[4], wn->base_cmd + REG_CNT_HI, (cnt >> 8) & 0xFF); 2014 pv_set(outbyte[5], wn->base_cmd + REG_COMMAND, w_command); 2015 if (atapi_debug) printf("cmd: %x ", w_command); 2016 if ((s=sys_voutb(outbyte,6)) != OK) 2017 panic("Couldn't write registers with sys_voutb(): %d", s); 2018 2019 if (!w_waitfor(STATUS_BSY | STATUS_DRQ, STATUS_DRQ)) { 2020 printf("%s: timeout (BSY|DRQ -> DRQ)\n", w_name()); 2021 return(ERR); 2022 } 2023 wn->w_status |= STATUS_ADMBSY; /* Command not at all done yet. */ 2024 2025 /* Send the command packet to the device. */ 2026 if ((s=sys_outsw(wn->base_cmd + REG_DATA, SELF, packet, ATAPI_PACKETSIZE)) != OK) 2027 panic("sys_outsw() failed: %d", s); 2028 2029 return(OK); 2030 } 2031 2032 /*===========================================================================* 2033 * w_ioctl * 2034 *===========================================================================*/ 2035 static int w_ioctl(devminor_t minor, unsigned long request, endpoint_t endpt, 2036 cp_grant_id_t grant, endpoint_t UNUSED(user_endpt)) 2037 { 2038 int r, timeout, prev, count; 2039 struct command cmd; 2040 2041 switch (request) { 2042 case DIOCTIMEOUT: 2043 r= sys_safecopyfrom(endpt, grant, 0, (vir_bytes)&timeout, 2044 sizeof(timeout)); 2045 2046 if(r != OK) 2047 return r; 2048 2049 if (timeout == 0) { 2050 /* Restore defaults. */ 2051 timeout_usecs = DEF_TIMEOUT_USECS; 2052 max_errors = MAX_ERRORS; 2053 wakeup_ticks = WAKEUP_TICKS; 2054 w_silent = 0; 2055 } else if (timeout < 0) { 2056 return EINVAL; 2057 } else { 2058 prev = wakeup_ticks; 2059 2060 if (!w_standard_timeouts) { 2061 /* Set (lower) timeout, lower error 2062 * tolerance and set silent mode. 2063 */ 2064 wakeup_ticks = timeout; 2065 max_errors = 3; 2066 w_silent = 1; 2067 2068 timeout = timeout * 1000000 / sys_hz(); 2069 2070 if (timeout_usecs > timeout) 2071 timeout_usecs = timeout; 2072 } 2073 2074 r= sys_safecopyto(endpt, grant, 0, (vir_bytes)&prev, 2075 sizeof(prev)); 2076 2077 if(r != OK) 2078 return r; 2079 } 2080 2081 return OK; 2082 2083 case DIOCOPENCT: 2084 if (w_prepare(minor) == NULL) return ENXIO; 2085 count = w_wn->open_ct; 2086 r= sys_safecopyto(endpt, grant, 0, (vir_bytes)&count, 2087 sizeof(count)); 2088 2089 if(r != OK) 2090 return r; 2091 2092 return OK; 2093 2094 case DIOCFLUSH: 2095 if (w_prepare(minor) == NULL) return ENXIO; 2096 2097 if (w_wn->state & ATAPI) return EINVAL; 2098 2099 if (!(w_wn->state & INITIALIZED) && w_specify() != OK) 2100 return EIO; 2101 2102 cmd.command = CMD_FLUSH_CACHE; 2103 2104 if (com_simple(&cmd) != OK || !w_waitfor(STATUS_BSY, 0)) 2105 return EIO; 2106 2107 return (w_wn->w_status & (STATUS_ERR|STATUS_WF)) ? EIO : OK; 2108 } 2109 2110 return ENOTTY; 2111 } 2112 2113 /*===========================================================================* 2114 * w_hw_int * 2115 *===========================================================================*/ 2116 static void w_hw_int(unsigned int UNUSED(irqs)) 2117 { 2118 /* Leftover interrupt(s) received; ack it/them. For native drives only. */ 2119 unsigned int drive; 2120 u32_t w_status; 2121 2122 for (drive = 0; drive < MAX_DRIVES; drive++) { 2123 if (!(wini[drive].state & IGNORING) && wini[drive].native) { 2124 if (sys_inb((wini[drive].base_cmd + REG_STATUS), 2125 &w_status) != OK) 2126 { 2127 panic("couldn't ack irq on drive: %d", drive); 2128 } 2129 wini[drive].w_status= w_status; 2130 sys_inb(wini[drive].base_dma + DMA_STATUS, &w_status); 2131 if(w_status & DMA_ST_INT) { 2132 sys_outb(wini[drive].base_dma + DMA_STATUS, DMA_ST_INT); 2133 wini[drive].dma_intseen = 1; 2134 } 2135 if (sys_irqenable(&wini[drive].irq_hook_id) != OK) 2136 printf("couldn't re-enable drive %d\n", drive); 2137 } 2138 } 2139 } 2140 2141 2142 #define STSTR(a) if (status & STATUS_ ## a) strlcat(str, #a " ", sizeof(str)); 2143 #define ERRSTR(a) if (e & ERROR_ ## a) strlcat(str, #a " ", sizeof(str)); 2144 static char *strstatus(int status) 2145 { 2146 static char str[200]; 2147 str[0] = '\0'; 2148 2149 STSTR(BSY); 2150 STSTR(DRDY); 2151 STSTR(DMADF); 2152 STSTR(SRVCDSC); 2153 STSTR(DRQ); 2154 STSTR(CORR); 2155 STSTR(CHECK); 2156 return str; 2157 } 2158 2159 static char *strerr(int e) 2160 { 2161 static char str[200]; 2162 str[0] = '\0'; 2163 2164 ERRSTR(BB); 2165 ERRSTR(ECC); 2166 ERRSTR(ID); 2167 ERRSTR(AC); 2168 ERRSTR(TK); 2169 ERRSTR(DM); 2170 2171 return str; 2172 } 2173 2174 /*===========================================================================* 2175 * atapi_intr_wait * 2176 *===========================================================================*/ 2177 static int atapi_intr_wait(int UNUSED(do_dma), size_t UNUSED(max)) 2178 { 2179 /* Wait for an interrupt and study the results. Returns a number of bytes 2180 * that need to be transferred, or an error code. 2181 */ 2182 struct wini *wn = w_wn; 2183 pvb_pair_t inbyte[4]; /* vector for sys_vinb() */ 2184 int s; /* status for sys_vinb() */ 2185 int e; 2186 int len; 2187 int irr; 2188 int r; 2189 int phase; 2190 2191 w_intr_wait(); 2192 2193 /* Request series of device I/O. */ 2194 inbyte[0].port = wn->base_cmd + REG_ERROR; 2195 inbyte[1].port = wn->base_cmd + REG_CNT_LO; 2196 inbyte[2].port = wn->base_cmd + REG_CNT_HI; 2197 inbyte[3].port = wn->base_cmd + REG_IRR; 2198 if ((s=sys_vinb(inbyte, 4)) != OK) 2199 panic("ATAPI failed sys_vinb(): %d", s); 2200 e = inbyte[0].value; 2201 len = inbyte[1].value; 2202 len |= inbyte[2].value << 8; 2203 irr = inbyte[3].value; 2204 2205 if (wn->w_status & (STATUS_BSY | STATUS_CHECK)) { 2206 if (atapi_debug) { 2207 printf("atapi fail: S=%x=%s E=%02x=%s L=%04x I=%02x\n", wn->w_status, strstatus(wn->w_status), e, strerr(e), len, irr); 2208 } 2209 return ERR; 2210 } 2211 2212 phase = (wn->w_status & STATUS_DRQ) | (irr & (IRR_COD | IRR_IO)); 2213 2214 switch (phase) { 2215 case IRR_COD | IRR_IO: 2216 if (ATAPI_DEBUG) printf("ACD: Phase Command Complete\n"); 2217 r = OK; 2218 break; 2219 case 0: 2220 if (ATAPI_DEBUG) printf("ACD: Phase Command Aborted\n"); 2221 r = ERR; 2222 break; 2223 case STATUS_DRQ | IRR_COD: 2224 if (ATAPI_DEBUG) printf("ACD: Phase Command Out\n"); 2225 r = ERR; 2226 break; 2227 case STATUS_DRQ: 2228 if (ATAPI_DEBUG) printf("ACD: Phase Data Out %d\n", len); 2229 r = len; 2230 break; 2231 case STATUS_DRQ | IRR_IO: 2232 if (ATAPI_DEBUG) printf("ACD: Phase Data In %d\n", len); 2233 r = len; 2234 break; 2235 default: 2236 if (ATAPI_DEBUG) printf("ACD: Phase Unknown\n"); 2237 r = ERR; 2238 break; 2239 } 2240 2241 wn->w_status |= STATUS_ADMBSY; /* Assume not done yet. */ 2242 return(r); 2243 } 2244