1 /* $OpenBSD: ata_wdc.c,v 1.40 2011/07/15 16:44:18 deraadt Exp $ */ 2 /* $NetBSD: ata_wdc.c,v 1.21 1999/08/09 09:43:11 bouyer Exp $ */ 3 4 /* 5 * Copyright (c) 1998, 2001 Manuel Bouyer. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 /*- 30 * Copyright (c) 1998 The NetBSD Foundation, Inc. 31 * All rights reserved. 32 * 33 * This code is derived from software contributed to The NetBSD Foundation 34 * by Charles M. Hannum, by Onno van der Linden and by Manuel Bouyer. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 46 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 47 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 48 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 49 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 50 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 51 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 52 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 53 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 54 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 55 * POSSIBILITY OF SUCH DAMAGE. 56 */ 57 58 #include <sys/param.h> 59 #include <sys/systm.h> 60 #include <sys/kernel.h> 61 #include <sys/file.h> 62 #include <sys/stat.h> 63 #include <sys/buf.h> 64 #include <sys/malloc.h> 65 #include <sys/device.h> 66 #include <sys/disklabel.h> 67 #include <sys/disk.h> 68 #include <sys/syslog.h> 69 #include <sys/proc.h> 70 71 #include <machine/intr.h> 72 #include <machine/bus.h> 73 74 #include <dev/ata/atareg.h> 75 #include <dev/ata/atavar.h> 76 #include <dev/ic/wdcreg.h> 77 #include <dev/ic/wdcvar.h> 78 #include <dev/ata/wdvar.h> 79 80 #define DEBUG_INTR 0x01 81 #define DEBUG_XFERS 0x02 82 #define DEBUG_STATUS 0x04 83 #define DEBUG_FUNCS 0x08 84 #define DEBUG_PROBE 0x10 85 86 #ifdef WDCDEBUG 87 #ifndef WDCDEBUG_WD_MASK 88 #define WDCDEBUG_WD_MASK 0x00 89 #endif 90 int wdcdebug_wd_mask = WDCDEBUG_WD_MASK; 91 #define WDCDEBUG_PRINT(args, level) do { \ 92 if ((wdcdebug_wd_mask & (level)) != 0) \ 93 printf args; \ 94 } while (0) 95 #else 96 #define WDCDEBUG_PRINT(args, level) 97 #endif 98 99 #define ATA_DELAY 45000 /* 45s for a drive I/O */ 100 101 void wdc_ata_bio_start(struct channel_softc *, struct wdc_xfer *); 102 void _wdc_ata_bio_start(struct channel_softc *, struct wdc_xfer *); 103 int wdc_ata_bio_intr(struct channel_softc *, struct wdc_xfer *, int); 104 void wdc_ata_bio_kill_xfer(struct channel_softc *, struct wdc_xfer *); 105 void wdc_ata_bio_done(struct channel_softc *, struct wdc_xfer *); 106 int wdc_ata_ctrl_intr(struct channel_softc *, struct wdc_xfer *, int); 107 int wdc_ata_err(struct ata_drive_datas *, struct ata_bio *); 108 #define WDC_ATA_NOERR 0x00 /* Drive doesn't report an error */ 109 #define WDC_ATA_RECOV 0x01 /* There was a recovered error */ 110 #define WDC_ATA_ERR 0x02 /* Drive reports an error */ 111 112 int 113 wd_hibernate_io(dev_t dev, daddr_t blkno, caddr_t addr, size_t size, int wr, void *page) 114 { 115 struct { 116 struct wd_softc wd; 117 struct wdc_xfer xfer; 118 struct channel_softc chp; 119 } *my = page; 120 struct wd_softc *real_wd, *wd = &my->wd; 121 struct wdc_xfer *xfer = &my->xfer; 122 struct channel_softc *chp = &my->chp; 123 struct ata_bio *ata_bio; 124 extern struct cfdriver wd_cd; 125 126 real_wd = (struct wd_softc *)disk_lookup(&wd_cd, DISKUNIT(dev)); 127 if (real_wd == NULL) 128 return (ENODEV); 129 130 /* 131 * Craft a fake set of softc and related structures 132 * which we think the driver modifies. Some of these will 133 * have pointers which reach to unsafe places, but.. 134 */ 135 bcopy(real_wd->drvp->chnl_softc, &my->chp, sizeof my->chp); 136 chp->ch_drive[0].chnl_softc = chp; 137 chp->ch_drive[1].chnl_softc = chp; 138 139 bcopy(real_wd, &my->wd, sizeof my->wd); 140 ata_bio = &wd->sc_wdc_bio; 141 ata_bio->wd = wd; /* fixup ata_bio->wd */ 142 wd->drvp = &chp->ch_drive[real_wd->drvp->drive]; 143 144 /* Fill the request and submit it */ 145 wd->sc_wdc_bio.blkno = blkno; 146 wd->sc_wdc_bio.flags = ATA_POLL | ATA_LBA48; 147 if (wr == 0) 148 wd->sc_wdc_bio.flags |= ATA_READ; 149 wd->sc_wdc_bio.bcount = size; 150 wd->sc_wdc_bio.databuf = addr; 151 wd->sc_wdc_bio.wd = wd; 152 153 bzero(&my->xfer, sizeof my->xfer); 154 xfer->c_flags |= C_PRIVATEXFER; /* Our xfer is totally private */ 155 xfer->c_flags |= C_POLL; 156 xfer->drive = wd->drvp->drive; 157 xfer->cmd = ata_bio; 158 xfer->databuf = ata_bio->databuf; 159 xfer->c_bcount = ata_bio->bcount; 160 xfer->c_start = wdc_ata_bio_start; 161 xfer->c_intr = wdc_ata_bio_intr; 162 xfer->c_kill_xfer = wdc_ata_bio_kill_xfer; 163 wdc_exec_xfer(chp, xfer); 164 return (ata_bio->flags & ATA_ITSDONE) ? 0 : 1; 165 } 166 167 /* 168 * Handle block I/O operation. Return WDC_COMPLETE, WDC_QUEUED, or 169 * WDC_TRY_AGAIN. Must be called at splbio(). 170 */ 171 int 172 wdc_ata_bio(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) 173 { 174 struct wdc_xfer *xfer; 175 struct channel_softc *chp = drvp->chnl_softc; 176 177 xfer = wdc_get_xfer(WDC_NOSLEEP); 178 if (xfer == NULL) 179 return WDC_TRY_AGAIN; 180 if (ata_bio->flags & ATA_POLL) 181 xfer->c_flags |= C_POLL; 182 if (!(ata_bio->flags & ATA_POLL) && 183 (drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA)) && 184 (ata_bio->flags & ATA_SINGLE) == 0 && 185 (ata_bio->bcount > 512 || 186 (chp->wdc->quirks & WDC_QUIRK_NOSHORTDMA) == 0)) 187 xfer->c_flags |= C_DMA; 188 xfer->drive = drvp->drive; 189 xfer->cmd = ata_bio; 190 xfer->databuf = ata_bio->databuf; 191 xfer->c_bcount = ata_bio->bcount; 192 xfer->c_start = wdc_ata_bio_start; 193 xfer->c_intr = wdc_ata_bio_intr; 194 xfer->c_kill_xfer = wdc_ata_bio_kill_xfer; 195 wdc_exec_xfer(chp, xfer); 196 return (ata_bio->flags & ATA_ITSDONE) ? WDC_COMPLETE : WDC_QUEUED; 197 } 198 199 void 200 wdc_ata_bio_start(struct channel_softc *chp, struct wdc_xfer *xfer) 201 { 202 struct ata_bio *ata_bio = xfer->cmd; 203 WDCDEBUG_PRINT(("wdc_ata_bio_start %s:%d:%d\n", 204 chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive), 205 DEBUG_XFERS); 206 207 /* start timeout machinery */ 208 if ((ata_bio->flags & ATA_POLL) == 0) 209 timeout_add_msec(&chp->ch_timo, ATA_DELAY); 210 _wdc_ata_bio_start(chp, xfer); 211 } 212 213 void 214 _wdc_ata_bio_start(struct channel_softc *chp, struct wdc_xfer *xfer) 215 { 216 struct ata_bio *ata_bio = xfer->cmd; 217 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive]; 218 u_int16_t cyl; 219 u_int8_t head, sect, cmd = 0; 220 int nblks; 221 int ata_delay; 222 int error, dma_flags = 0; 223 224 WDCDEBUG_PRINT(("_wdc_ata_bio_start %s:%d:%d\n", 225 chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive), 226 DEBUG_INTR | DEBUG_XFERS); 227 /* Do control operations specially. */ 228 if (drvp->state < READY) { 229 /* 230 * Actually, we want to be careful not to mess with the control 231 * state if the device is currently busy, but we can assume 232 * that we never get to this point if that's the case. 233 */ 234 /* at this point, we should only be in RECAL state */ 235 if (drvp->state != RECAL) { 236 printf("%s:%d:%d: bad state %d in _wdc_ata_bio_start\n", 237 chp->wdc->sc_dev.dv_xname, chp->channel, 238 xfer->drive, drvp->state); 239 panic("_wdc_ata_bio_start: bad state"); 240 } 241 xfer->c_intr = wdc_ata_ctrl_intr; 242 wdc_set_drive(chp, xfer->drive); 243 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY) != 0) 244 goto timeout; 245 wdccommandshort(chp, xfer->drive, WDCC_RECAL); 246 drvp->state = RECAL_WAIT; 247 if ((ata_bio->flags & ATA_POLL) == 0) { 248 chp->ch_flags |= WDCF_IRQ_WAIT; 249 } else { 250 /* Wait for at last 400ns for status bit to be valid */ 251 DELAY(1); 252 wdc_ata_ctrl_intr(chp, xfer, 0); 253 } 254 return; 255 } 256 257 if (xfer->c_flags & C_DMA) { 258 if (drvp->n_xfers <= NXFER) 259 drvp->n_xfers++; 260 dma_flags = (ata_bio->flags & ATA_READ) ? WDC_DMA_READ : 0; 261 if (ata_bio->flags & ATA_LBA48) 262 dma_flags |= WDC_DMA_LBA48; 263 } 264 if (ata_bio->flags & ATA_SINGLE) 265 ata_delay = ATA_DELAY; 266 else 267 ata_delay = ATA_DELAY; 268 again: 269 /* 270 * 271 * When starting a multi-sector transfer, or doing single-sector 272 * transfers... 273 */ 274 if (xfer->c_skip == 0 || (ata_bio->flags & ATA_SINGLE) != 0) { 275 if (ata_bio->flags & ATA_SINGLE) 276 nblks = 1; 277 else 278 nblks = xfer->c_bcount / ata_bio->lp->d_secsize; 279 if (ata_bio->flags & ATA_LBA) { 280 sect = (ata_bio->blkno >> 0) & 0xff; 281 cyl = (ata_bio->blkno >> 8) & 0xffff; 282 head = (ata_bio->blkno >> 24) & 0x0f; 283 head |= WDSD_LBA; 284 } else { 285 int blkno = ata_bio->blkno; 286 sect = blkno % ata_bio->lp->d_nsectors; 287 sect++; /* Sectors begin with 1, not 0. */ 288 blkno /= ata_bio->lp->d_nsectors; 289 head = blkno % ata_bio->lp->d_ntracks; 290 blkno /= ata_bio->lp->d_ntracks; 291 cyl = blkno; 292 head |= WDSD_CHS; 293 } 294 if (xfer->c_flags & C_DMA) { 295 ata_bio->nblks = nblks; 296 ata_bio->nbytes = xfer->c_bcount; 297 if (ata_bio->flags & ATA_LBA48) 298 cmd = (ata_bio->flags & ATA_READ) ? 299 WDCC_READDMA_EXT : WDCC_WRITEDMA_EXT; 300 else 301 cmd = (ata_bio->flags & ATA_READ) ? 302 WDCC_READDMA : WDCC_WRITEDMA; 303 /* Init the DMA channel. */ 304 error = (*chp->wdc->dma_init)(chp->wdc->dma_arg, 305 chp->channel, xfer->drive, 306 (char *)xfer->databuf + xfer->c_skip, 307 ata_bio->nbytes, dma_flags); 308 if (error) { 309 if (error == EINVAL) { 310 /* 311 * We can't do DMA on this transfer 312 * for some reason. Fall back to 313 * PIO. 314 */ 315 xfer->c_flags &= ~C_DMA; 316 error = 0; 317 goto do_pio; 318 } 319 ata_bio->error = ERR_DMA; 320 ata_bio->r_error = 0; 321 wdc_ata_bio_done(chp, xfer); 322 return; 323 } 324 /* Initiate command */ 325 wdc_set_drive(chp, xfer->drive); 326 if (wait_for_ready(chp, ata_delay) < 0) 327 goto timeout; 328 329 /* start the DMA channel (before) */ 330 if (chp->ch_flags & WDCF_DMA_BEFORE_CMD) 331 (*chp->wdc->dma_start)(chp->wdc->dma_arg, 332 chp->channel, xfer->drive); 333 334 if (ata_bio->flags & ATA_LBA48) { 335 wdccommandext(chp, xfer->drive, cmd, 336 (u_int64_t)ata_bio->blkno, nblks); 337 } else { 338 wdccommand(chp, xfer->drive, cmd, cyl, 339 head, sect, nblks, 0); 340 } 341 342 /* start the DMA channel (after) */ 343 if ((chp->ch_flags & WDCF_DMA_BEFORE_CMD) == 0) 344 (*chp->wdc->dma_start)(chp->wdc->dma_arg, 345 chp->channel, xfer->drive); 346 347 chp->ch_flags |= WDCF_DMA_WAIT; 348 /* wait for irq */ 349 goto intr; 350 } /* else not DMA */ 351 do_pio: 352 ata_bio->nblks = min(nblks, ata_bio->multi); 353 ata_bio->nbytes = ata_bio->nblks * ata_bio->lp->d_secsize; 354 KASSERT(nblks == 1 || (ata_bio->flags & ATA_SINGLE) == 0); 355 if (ata_bio->nblks > 1) { 356 if (ata_bio->flags & ATA_LBA48) 357 cmd = (ata_bio->flags & ATA_READ) ? 358 WDCC_READMULTI_EXT : WDCC_WRITEMULTI_EXT; 359 else 360 cmd = (ata_bio->flags & ATA_READ) ? 361 WDCC_READMULTI : WDCC_WRITEMULTI; 362 } else { 363 if (ata_bio->flags & ATA_LBA48) 364 cmd = (ata_bio->flags & ATA_READ) ? 365 WDCC_READ_EXT : WDCC_WRITE_EXT; 366 else 367 cmd = (ata_bio->flags & ATA_READ) ? 368 WDCC_READ : WDCC_WRITE; 369 } 370 /* Initiate command! */ 371 wdc_set_drive(chp, xfer->drive); 372 if (wait_for_ready(chp, ata_delay) < 0) 373 goto timeout; 374 if (ata_bio->flags & ATA_LBA48) { 375 wdccommandext(chp, xfer->drive, cmd, 376 (u_int64_t)ata_bio->blkno, nblks); 377 } else { 378 wdccommand(chp, xfer->drive, cmd, cyl, 379 head, sect, nblks, 380 (ata_bio->lp->d_type == DTYPE_ST506) ? 381 ata_bio->lp->d_precompcyl / 4 : 0); 382 } 383 } else if (ata_bio->nblks > 1) { 384 /* The number of blocks in the last stretch may be smaller. */ 385 nblks = xfer->c_bcount / ata_bio->lp->d_secsize; 386 if (ata_bio->nblks > nblks) { 387 ata_bio->nblks = nblks; 388 ata_bio->nbytes = xfer->c_bcount; 389 } 390 } 391 /* If this was a write and not using DMA, push the data. */ 392 if ((ata_bio->flags & ATA_READ) == 0) { 393 if (wait_for_drq(chp, ata_delay) != 0) { 394 printf("%s:%d:%d: timeout waiting for DRQ, " 395 "st=0x%b, err=0x%02x\n", 396 chp->wdc->sc_dev.dv_xname, chp->channel, 397 xfer->drive, chp->ch_status, WDCS_BITS, 398 chp->ch_error); 399 if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) 400 ata_bio->error = TIMEOUT; 401 wdc_ata_bio_done(chp, xfer); 402 return; 403 } 404 if (wdc_ata_err(drvp, ata_bio) == WDC_ATA_ERR) { 405 wdc_ata_bio_done(chp, xfer); 406 return; 407 } 408 wdc_output_bytes(drvp, (char *)xfer->databuf + xfer->c_skip, 409 ata_bio->nbytes); 410 } 411 412 intr: /* Wait for IRQ (either real or polled) */ 413 if ((ata_bio->flags & ATA_POLL) == 0) { 414 chp->ch_flags |= WDCF_IRQ_WAIT; 415 } else { 416 /* Wait for at last 400ns for status bit to be valid */ 417 delay(1); 418 if (chp->ch_flags & WDCF_DMA_WAIT) { 419 wdc_dmawait(chp, xfer, ATA_DELAY); 420 chp->ch_flags &= ~WDCF_DMA_WAIT; 421 } 422 wdc_ata_bio_intr(chp, xfer, 0); 423 if ((ata_bio->flags & ATA_ITSDONE) == 0) 424 goto again; 425 } 426 return; 427 timeout: 428 if (chp->ch_status == 0xff) 429 return; 430 printf("%s:%d:%d: not ready, st=0x%b, err=0x%02x\n", 431 chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive, 432 chp->ch_status, WDCS_BITS, chp->ch_error); 433 if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) 434 ata_bio->error = TIMEOUT; 435 wdc_ata_bio_done(chp, xfer); 436 return; 437 } 438 439 int 440 wdc_ata_bio_intr(struct channel_softc *chp, struct wdc_xfer *xfer, int irq) 441 { 442 struct ata_bio *ata_bio = xfer->cmd; 443 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive]; 444 int drv_err; 445 446 WDCDEBUG_PRINT(("wdc_ata_bio_intr %s:%d:%d\n", 447 chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive), 448 DEBUG_INTR | DEBUG_XFERS); 449 450 451 /* Is it not a transfer, but a control operation? */ 452 if (drvp->state < READY) { 453 printf("%s:%d:%d: bad state %d in wdc_ata_bio_intr\n", 454 chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive, 455 drvp->state); 456 panic("wdc_ata_bio_intr: bad state"); 457 } 458 459 /* 460 * reset on timeout. This will cause extra resets in the case 461 * of occasional lost interrupts 462 */ 463 if (xfer->c_flags & C_TIMEOU) 464 goto timeout; 465 466 /* Ack interrupt done by wait_for_unbusy */ 467 if (wait_for_unbusy(chp, 468 (irq == 0) ? ATA_DELAY : 0) < 0) { 469 if (irq) 470 return 0; /* IRQ was not for us */ 471 printf("%s:%d:%d: device timeout, c_bcount=%d, c_skip%d\n", 472 chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive, 473 xfer->c_bcount, xfer->c_skip); 474 475 goto timeout; 476 } 477 if (chp->wdc->cap & WDC_CAPABILITY_IRQACK) 478 chp->wdc->irqack(chp); 479 480 drv_err = wdc_ata_err(drvp, ata_bio); 481 482 if (xfer->c_flags & C_DMA) { 483 if (chp->wdc->dma_status != 0) { 484 if (drv_err != WDC_ATA_ERR) { 485 ata_bio->error = ERR_DMA; 486 drv_err = WDC_ATA_ERR; 487 } 488 } 489 if (chp->ch_status & WDCS_DRQ) { 490 if (drv_err != WDC_ATA_ERR) { 491 printf("%s:%d:%d: intr with DRQ (st=0x%b)\n", 492 chp->wdc->sc_dev.dv_xname, chp->channel, 493 xfer->drive, chp->ch_status, WDCS_BITS); 494 ata_bio->error = TIMEOUT; 495 drv_err = WDC_ATA_ERR; 496 } 497 } 498 if (drv_err != WDC_ATA_ERR) 499 goto end; 500 ata_dmaerr(drvp); 501 } 502 503 /* if we had an error, end */ 504 if (drv_err == WDC_ATA_ERR) { 505 wdc_ata_bio_done(chp, xfer); 506 return 1; 507 } 508 509 /* If this was a read and not using DMA, fetch the data. */ 510 if ((ata_bio->flags & ATA_READ) != 0) { 511 if ((chp->ch_status & WDCS_DRQ) != WDCS_DRQ) { 512 printf("%s:%d:%d: read intr before drq\n", 513 chp->wdc->sc_dev.dv_xname, chp->channel, 514 xfer->drive); 515 ata_bio->error = TIMEOUT; 516 wdc_ata_bio_done(chp, xfer); 517 return 1; 518 } 519 wdc_input_bytes(drvp, (char *)xfer->databuf + xfer->c_skip, 520 ata_bio->nbytes); 521 } 522 end: 523 ata_bio->blkno += ata_bio->nblks; 524 ata_bio->blkdone += ata_bio->nblks; 525 xfer->c_skip += ata_bio->nbytes; 526 xfer->c_bcount -= ata_bio->nbytes; 527 /* See if this transfer is complete. */ 528 if (xfer->c_bcount > 0) { 529 if ((ata_bio->flags & ATA_POLL) == 0) { 530 /* Start the next operation */ 531 _wdc_ata_bio_start(chp, xfer); 532 } else { 533 /* Let _wdc_ata_bio_start do the loop */ 534 return 1; 535 } 536 } else { /* Done with this transfer */ 537 ata_bio->error = NOERROR; 538 wdc_ata_bio_done(chp, xfer); 539 } 540 return 1; 541 542 timeout: 543 if (xfer->c_flags & C_DMA) 544 ata_dmaerr(drvp); 545 546 ata_bio->error = TIMEOUT; 547 wdc_ata_bio_done(chp, xfer); 548 return 1; 549 } 550 551 void 552 wdc_ata_bio_kill_xfer(struct channel_softc *chp, struct wdc_xfer *xfer) 553 { 554 struct ata_bio *ata_bio = xfer->cmd; 555 556 timeout_del(&chp->ch_timo); 557 /* remove this command from xfer queue */ 558 wdc_free_xfer(chp, xfer); 559 560 ata_bio->flags |= ATA_ITSDONE; 561 ata_bio->error = ERR_NODEV; 562 ata_bio->r_error = WDCE_ABRT; 563 if ((ata_bio->flags & ATA_POLL) == 0) { 564 WDCDEBUG_PRINT(("wdc_ata_done: wddone\n"), DEBUG_XFERS); 565 wddone(ata_bio->wd); 566 } 567 } 568 569 void 570 wdc_ata_bio_done(struct channel_softc *chp, struct wdc_xfer *xfer) 571 { 572 struct ata_bio *ata_bio = xfer->cmd; 573 574 WDCDEBUG_PRINT(("wdc_ata_bio_done %s:%d:%d: flags 0x%x\n", 575 chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive, 576 (u_int)xfer->c_flags), 577 DEBUG_XFERS); 578 579 if ((xfer->c_flags & C_PRIVATEXFER) == 0) 580 timeout_del(&chp->ch_timo); 581 582 /* feed back residual bcount to our caller */ 583 ata_bio->bcount = xfer->c_bcount; 584 585 /* remove this command from xfer queue */ 586 wdc_free_xfer(chp, xfer); 587 588 ata_bio->flags |= ATA_ITSDONE; 589 if ((ata_bio->flags & ATA_POLL) == 0) { 590 WDCDEBUG_PRINT(("wdc_ata_done: wddone\n"), DEBUG_XFERS); 591 wddone(ata_bio->wd); 592 } 593 WDCDEBUG_PRINT(("wdcstart from wdc_ata_done, flags 0x%x\n", 594 chp->ch_flags), DEBUG_XFERS); 595 wdcstart(chp); 596 } 597 598 /* 599 * Implement operations needed before read/write. 600 */ 601 int 602 wdc_ata_ctrl_intr(struct channel_softc *chp, struct wdc_xfer *xfer, int irq) 603 { 604 struct ata_bio *ata_bio = xfer->cmd; 605 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->drive]; 606 char *errstring = NULL; 607 int delay = (irq == 0) ? ATA_DELAY : 0; 608 609 WDCDEBUG_PRINT(("wdc_ata_ctrl_intr: state %d\n", drvp->state), 610 DEBUG_FUNCS); 611 612 again: 613 switch (drvp->state) { 614 case RECAL: /* Should not be in this state here */ 615 panic("wdc_ata_ctrl_intr: state==RECAL"); 616 break; 617 618 case RECAL_WAIT: 619 errstring = "recal"; 620 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay)) 621 goto timeout; 622 if (chp->wdc->cap & WDC_CAPABILITY_IRQACK) 623 chp->wdc->irqack(chp); 624 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 625 goto error; 626 /* FALLTHROUGH */ 627 628 case PIOMODE: 629 /* Don't try to set modes if controller can't be adjusted */ 630 if ((chp->wdc->cap & WDC_CAPABILITY_MODE) == 0) 631 goto geometry; 632 /* Also don't try if the drive didn't report its mode */ 633 if ((drvp->drive_flags & DRIVE_MODE) == 0) 634 goto geometry; 635 /* SET FEATURES 0x08 is only for PIO mode > 2 */ 636 if (drvp->PIO_mode <= 2) 637 goto geometry; 638 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 639 0x08 | drvp->PIO_mode, WDSF_SET_MODE); 640 drvp->state = PIOMODE_WAIT; 641 break; 642 643 case PIOMODE_WAIT: 644 errstring = "piomode"; 645 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay)) 646 goto timeout; 647 if (chp->wdc->cap & WDC_CAPABILITY_IRQACK) 648 chp->wdc->irqack(chp); 649 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 650 goto error; 651 /* FALLTHROUGH */ 652 653 case DMAMODE: 654 if (drvp->drive_flags & DRIVE_UDMA) { 655 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 656 0x40 | drvp->UDMA_mode, WDSF_SET_MODE); 657 } else if (drvp->drive_flags & DRIVE_DMA) { 658 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 659 0x20 | drvp->DMA_mode, WDSF_SET_MODE); 660 } else { 661 goto geometry; 662 } 663 drvp->state = DMAMODE_WAIT; 664 break; 665 case DMAMODE_WAIT: 666 errstring = "dmamode"; 667 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay)) 668 goto timeout; 669 if (chp->wdc->cap & WDC_CAPABILITY_IRQACK) 670 chp->wdc->irqack(chp); 671 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 672 goto error; 673 /* FALLTHROUGH */ 674 675 case GEOMETRY: 676 geometry: 677 if (ata_bio->flags & ATA_LBA) 678 goto multimode; 679 wdccommand(chp, xfer->drive, WDCC_IDP, 680 ata_bio->lp->d_ncylinders, 681 ata_bio->lp->d_ntracks - 1, 0, ata_bio->lp->d_nsectors, 682 (ata_bio->lp->d_type == DTYPE_ST506) ? 683 ata_bio->lp->d_precompcyl / 4 : 0); 684 drvp->state = GEOMETRY_WAIT; 685 break; 686 687 case GEOMETRY_WAIT: 688 errstring = "geometry"; 689 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay)) 690 goto timeout; 691 if (chp->wdc->cap & WDC_CAPABILITY_IRQACK) 692 chp->wdc->irqack(chp); 693 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 694 goto error; 695 /* FALLTHROUGH */ 696 697 case MULTIMODE: 698 multimode: 699 if (ata_bio->multi == 1) 700 goto ready; 701 wdccommand(chp, xfer->drive, WDCC_SETMULTI, 0, 0, 0, 702 ata_bio->multi, 0); 703 drvp->state = MULTIMODE_WAIT; 704 break; 705 706 case MULTIMODE_WAIT: 707 errstring = "setmulti"; 708 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, delay)) 709 goto timeout; 710 if (chp->wdc->cap & WDC_CAPABILITY_IRQACK) 711 chp->wdc->irqack(chp); 712 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 713 goto error; 714 /* FALLTHROUGH */ 715 716 case READY: 717 ready: 718 drvp->state = READY; 719 /* 720 * The drive is usable now 721 */ 722 xfer->c_intr = wdc_ata_bio_intr; 723 _wdc_ata_bio_start(chp, xfer); 724 return 1; 725 } 726 727 if ((ata_bio->flags & ATA_POLL) == 0) { 728 chp->ch_flags |= WDCF_IRQ_WAIT; 729 } else { 730 goto again; 731 } 732 return 1; 733 734 timeout: 735 if (irq && (xfer->c_flags & C_TIMEOU) == 0) { 736 return 0; /* IRQ was not for us */ 737 } 738 printf("%s:%d:%d: %s timed out\n", 739 chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive, errstring); 740 ata_bio->error = TIMEOUT; 741 drvp->state = 0; 742 wdc_ata_bio_done(chp, xfer); 743 return 0; 744 error: 745 printf("%s:%d:%d: %s ", 746 chp->wdc->sc_dev.dv_xname, chp->channel, xfer->drive, 747 errstring); 748 if (chp->ch_status & WDCS_DWF) { 749 printf("drive fault\n"); 750 ata_bio->error = ERR_DF; 751 } else { 752 printf("error (%x)\n", chp->ch_error); 753 ata_bio->r_error = chp->ch_error; 754 ata_bio->error = ERROR; 755 } 756 drvp->state = 0; 757 wdc_ata_bio_done(chp, xfer); 758 return 1; 759 } 760 761 int 762 wdc_ata_err(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) 763 { 764 struct channel_softc *chp = drvp->chnl_softc; 765 ata_bio->error = 0; 766 767 if (chp->ch_status == 0xff) { 768 ata_bio->error = ERR_NODEV; 769 return WDC_ATA_ERR; 770 } 771 if (chp->ch_status & WDCS_BSY) { 772 ata_bio->error = TIMEOUT; 773 return WDC_ATA_ERR; 774 } 775 776 if (chp->ch_status & WDCS_DWF) { 777 ata_bio->error = ERR_DF; 778 return WDC_ATA_ERR; 779 } 780 781 if (chp->ch_status & WDCS_ERR) { 782 ata_bio->error = ERROR; 783 ata_bio->r_error = chp->ch_error; 784 if (drvp->drive_flags & DRIVE_UDMA && 785 (ata_bio->r_error & WDCE_CRC)) { 786 /* 787 * Record the CRC error, to avoid downgrading to 788 * multiword DMA 789 */ 790 drvp->drive_flags |= DRIVE_DMAERR; 791 } 792 if (ata_bio->r_error & (WDCE_BBK | WDCE_UNC | WDCE_IDNF | 793 WDCE_ABRT | WDCE_TK0NF | WDCE_AMNF)) 794 return WDC_ATA_ERR; 795 return WDC_ATA_NOERR; 796 } 797 798 if (chp->ch_status & WDCS_CORR) 799 ata_bio->flags |= ATA_CORR; 800 return WDC_ATA_NOERR; 801 } 802 803 #if 0 804 int 805 wdc_ata_addref(drvp) 806 struct ata_drive_datas *drvp; 807 { 808 struct channel_softc *chp = drvp->chnl_softc; 809 810 return (wdc_addref(chp)); 811 } 812 813 void 814 wdc_ata_delref(drvp) 815 struct ata_drive_datas *drvp; 816 { 817 struct channel_softc *chp = drvp->chnl_softc; 818 819 wdc_delref(chp); 820 } 821 #endif 822