ata_wdc.c revision 1.75
1 /* $NetBSD: ata_wdc.c,v 1.75 2004/08/21 02:17:07 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2001, 2003 Manuel Bouyer. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Manuel Bouyer. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. 34 * All rights reserved. 35 * 36 * This code is derived from software contributed to The NetBSD Foundation 37 * by Charles M. Hannum, by Onno van der Linden and by Manuel Bouyer. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. All advertising materials mentioning features or use of this software 48 * must display the following acknowledgement: 49 * This product includes software developed by the NetBSD 50 * Foundation, Inc. and its contributors. 51 * 4. Neither the name of The NetBSD Foundation nor the names of its 52 * contributors may be used to endorse or promote products derived 53 * from this software without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 56 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 57 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 58 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 59 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 60 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 61 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 62 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 63 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 64 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 65 * POSSIBILITY OF SUCH DAMAGE. 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: ata_wdc.c,v 1.75 2004/08/21 02:17:07 thorpej Exp $"); 70 71 #ifndef ATADEBUG 72 #define ATADEBUG 73 #endif /* ATADEBUG */ 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/kernel.h> 78 #include <sys/file.h> 79 #include <sys/stat.h> 80 #include <sys/buf.h> 81 #include <sys/malloc.h> 82 #include <sys/device.h> 83 #include <sys/disklabel.h> 84 #include <sys/syslog.h> 85 #include <sys/proc.h> 86 87 #include <machine/intr.h> 88 #include <machine/bus.h> 89 #ifndef __BUS_SPACE_HAS_STREAM_METHODS 90 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 91 #define bus_space_write_multi_stream_4 bus_space_write_multi_4 92 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 93 #define bus_space_read_multi_stream_4 bus_space_read_multi_4 94 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 95 96 #include <dev/ata/atareg.h> 97 #include <dev/ata/atavar.h> 98 #include <dev/ic/wdcreg.h> 99 #include <dev/ic/wdcvar.h> 100 101 #define DEBUG_INTR 0x01 102 #define DEBUG_XFERS 0x02 103 #define DEBUG_STATUS 0x04 104 #define DEBUG_FUNCS 0x08 105 #define DEBUG_PROBE 0x10 106 #ifdef ATADEBUG 107 extern int wdcdebug_wd_mask; /* inited in wd.c */ 108 #define ATADEBUG_PRINT(args, level) \ 109 if (wdcdebug_wd_mask & (level)) \ 110 printf args 111 #else 112 #define ATADEBUG_PRINT(args, level) 113 #endif 114 115 #define ATA_DELAY 10000 /* 10s for a drive I/O */ 116 117 static int wdc_ata_bio(struct ata_drive_datas*, struct ata_bio*); 118 static void wdc_ata_bio_start(struct ata_channel *,struct ata_xfer *); 119 static void _wdc_ata_bio_start(struct ata_channel *,struct ata_xfer *); 120 static int wdc_ata_bio_intr(struct ata_channel *, struct ata_xfer *, 121 int); 122 static void wdc_ata_bio_kill_xfer(struct ata_channel *, 123 struct ata_xfer *, int); 124 static void wdc_ata_bio_done(struct ata_channel *, struct ata_xfer *); 125 static int wdc_ata_err(struct ata_drive_datas *, struct ata_bio *); 126 #define WDC_ATA_NOERR 0x00 /* Drive doesn't report an error */ 127 #define WDC_ATA_RECOV 0x01 /* There was a recovered error */ 128 #define WDC_ATA_ERR 0x02 /* Drive reports an error */ 129 static int wdc_ata_addref(struct ata_drive_datas *); 130 static void wdc_ata_delref(struct ata_drive_datas *); 131 132 const struct ata_bustype wdc_ata_bustype = { 133 SCSIPI_BUSTYPE_ATA, 134 wdc_ata_bio, 135 wdc_reset_drive, 136 wdc_reset_channel, 137 wdc_exec_command, 138 ata_get_params, 139 wdc_ata_addref, 140 wdc_ata_delref, 141 ata_kill_pending, 142 }; 143 144 /* 145 * Handle block I/O operation. Return ATACMD_COMPLETE, ATACMD_QUEUED, or 146 * ATACMD_TRY_AGAIN. Must be called at splbio(). 147 */ 148 static int 149 wdc_ata_bio(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) 150 { 151 struct ata_xfer *xfer; 152 struct ata_channel *chp = drvp->chnl_softc; 153 struct atac_softc *atac = chp->ch_atac; 154 155 xfer = ata_get_xfer(ATAXF_NOSLEEP); 156 if (xfer == NULL) 157 return ATACMD_TRY_AGAIN; 158 if (atac->atac_cap & ATAC_CAP_NOIRQ) 159 ata_bio->flags |= ATA_POLL; 160 if (ata_bio->flags & ATA_POLL) 161 xfer->c_flags |= C_POLL; 162 if ((drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA)) && 163 (ata_bio->flags & ATA_SINGLE) == 0) 164 xfer->c_flags |= C_DMA; 165 xfer->c_drive = drvp->drive; 166 xfer->c_cmd = ata_bio; 167 xfer->c_databuf = ata_bio->databuf; 168 xfer->c_bcount = ata_bio->bcount; 169 xfer->c_start = wdc_ata_bio_start; 170 xfer->c_intr = wdc_ata_bio_intr; 171 xfer->c_kill_xfer = wdc_ata_bio_kill_xfer; 172 ata_exec_xfer(chp, xfer); 173 return (ata_bio->flags & ATA_ITSDONE) ? ATACMD_COMPLETE : ATACMD_QUEUED; 174 } 175 176 static void 177 wdc_ata_bio_start(struct ata_channel *chp, struct ata_xfer *xfer) 178 { 179 struct atac_softc *atac = chp->ch_atac; 180 struct wdc_softc *wdc = CHAN_TO_WDC(chp); 181 struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; 182 struct ata_bio *ata_bio = xfer->c_cmd; 183 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 184 int wait_flags = (xfer->c_flags & C_POLL) ? AT_POLL : 0; 185 char *errstring; 186 187 ATADEBUG_PRINT(("wdc_ata_bio_start %s:%d:%d\n", 188 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive), 189 DEBUG_XFERS); 190 191 /* Do control operations specially. */ 192 if (__predict_false(drvp->state < READY)) { 193 /* 194 * Actually, we want to be careful not to mess with the control 195 * state if the device is currently busy, but we can assume 196 * that we never get to this point if that's the case. 197 */ 198 /* If it's not a polled command, we need the kenrel thread */ 199 if ((xfer->c_flags & C_POLL) == 0 && 200 (chp->ch_flags & ATACH_TH_RUN) == 0) { 201 chp->ch_queue->queue_freeze++; 202 wakeup(&chp->ch_thread); 203 return; 204 } 205 /* 206 * disable interrupts, all commands here should be quick 207 * enouth to be able to poll, and we don't go here that often 208 */ 209 bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, 210 WDCTL_4BIT | WDCTL_IDS); 211 if (wdc->select) 212 wdc->select(chp, xfer->c_drive); 213 bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, 214 WDSD_IBM | (xfer->c_drive << 4)); 215 DELAY(10); 216 errstring = "wait"; 217 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 218 goto ctrltimeout; 219 wdccommandshort(chp, xfer->c_drive, WDCC_RECAL); 220 /* Wait for at last 400ns for status bit to be valid */ 221 DELAY(1); 222 errstring = "recal"; 223 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 224 goto ctrltimeout; 225 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 226 goto ctrlerror; 227 /* Don't try to set modes if controller can't be adjusted */ 228 if (atac->atac_set_modes == NULL) 229 goto geometry; 230 /* Also don't try if the drive didn't report its mode */ 231 if ((drvp->drive_flags & DRIVE_MODE) == 0) 232 goto geometry; 233 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 234 0x08 | drvp->PIO_mode, WDSF_SET_MODE); 235 errstring = "piomode"; 236 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 237 goto ctrltimeout; 238 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 239 goto ctrlerror; 240 if (drvp->drive_flags & DRIVE_UDMA) { 241 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 242 0x40 | drvp->UDMA_mode, WDSF_SET_MODE); 243 } else if (drvp->drive_flags & DRIVE_DMA) { 244 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 245 0x20 | drvp->DMA_mode, WDSF_SET_MODE); 246 } else { 247 goto geometry; 248 } 249 errstring = "dmamode"; 250 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 251 goto ctrltimeout; 252 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 253 goto ctrlerror; 254 geometry: 255 if (ata_bio->flags & ATA_LBA) 256 goto multimode; 257 wdccommand(chp, xfer->c_drive, WDCC_IDP, 258 ata_bio->lp->d_ncylinders, 259 ata_bio->lp->d_ntracks - 1, 0, ata_bio->lp->d_nsectors, 260 (ata_bio->lp->d_type == DTYPE_ST506) ? 261 ata_bio->lp->d_precompcyl / 4 : 0); 262 errstring = "geometry"; 263 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 264 goto ctrltimeout; 265 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 266 goto ctrlerror; 267 multimode: 268 if (ata_bio->multi == 1) 269 goto ready; 270 wdccommand(chp, xfer->c_drive, WDCC_SETMULTI, 0, 0, 0, 271 ata_bio->multi, 0); 272 errstring = "setmulti"; 273 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 274 goto ctrltimeout; 275 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 276 goto ctrlerror; 277 ready: 278 drvp->state = READY; 279 /* 280 * The drive is usable now 281 */ 282 bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, 283 WDCTL_4BIT); 284 delay(10); /* some drives need a little delay here */ 285 } 286 287 _wdc_ata_bio_start(chp, xfer); 288 return; 289 ctrltimeout: 290 printf("%s:%d:%d: %s timed out\n", 291 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 292 errstring); 293 ata_bio->error = TIMEOUT; 294 goto ctrldone; 295 ctrlerror: 296 printf("%s:%d:%d: %s ", 297 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 298 errstring); 299 if (chp->ch_status & WDCS_DWF) { 300 printf("drive fault\n"); 301 ata_bio->error = ERR_DF; 302 } else { 303 printf("error (%x)\n", chp->ch_error); 304 ata_bio->r_error = chp->ch_error; 305 ata_bio->error = ERROR; 306 } 307 ctrldone: 308 drvp->state = 0; 309 wdc_ata_bio_done(chp, xfer); 310 bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); 311 return; 312 } 313 314 static void 315 _wdc_ata_bio_start(struct ata_channel *chp, struct ata_xfer *xfer) 316 { 317 struct atac_softc *atac = chp->ch_atac; 318 struct wdc_softc *wdc = CHAN_TO_WDC(chp); 319 struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; 320 struct ata_bio *ata_bio = xfer->c_cmd; 321 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 322 int wait_flags = (xfer->c_flags & C_POLL) ? AT_POLL : 0; 323 u_int16_t cyl; 324 u_int8_t head, sect, cmd = 0; 325 int nblks; 326 int dma_flags = 0; 327 328 ATADEBUG_PRINT(("_wdc_ata_bio_start %s:%d:%d\n", 329 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive), 330 DEBUG_INTR | DEBUG_XFERS); 331 332 if (xfer->c_flags & C_DMA) { 333 if (drvp->n_xfers <= NXFER) 334 drvp->n_xfers++; 335 dma_flags = (ata_bio->flags & ATA_READ) ? WDC_DMA_READ : 0; 336 if (ata_bio->flags & ATA_LBA48) 337 dma_flags |= WDC_DMA_LBA48; 338 } 339 again: 340 /* 341 * 342 * When starting a multi-sector transfer, or doing single-sector 343 * transfers... 344 */ 345 if (xfer->c_skip == 0 || (ata_bio->flags & ATA_SINGLE) != 0) { 346 if (ata_bio->flags & ATA_SINGLE) 347 nblks = 1; 348 else 349 nblks = xfer->c_bcount / ata_bio->lp->d_secsize; 350 /* Check for bad sectors and adjust transfer, if necessary. */ 351 if ((ata_bio->lp->d_flags & D_BADSECT) != 0) { 352 long blkdiff; 353 int i; 354 for (i = 0; (blkdiff = ata_bio->badsect[i]) != -1; 355 i++) { 356 blkdiff -= ata_bio->blkno; 357 if (blkdiff < 0) 358 continue; 359 if (blkdiff == 0) { 360 /* Replace current block of transfer. */ 361 ata_bio->blkno = 362 ata_bio->lp->d_secperunit - 363 ata_bio->lp->d_nsectors - i - 1; 364 } 365 if (blkdiff < nblks) { 366 /* Bad block inside transfer. */ 367 ata_bio->flags |= ATA_SINGLE; 368 nblks = 1; 369 } 370 break; 371 } 372 /* Transfer is okay now. */ 373 } 374 if (ata_bio->flags & ATA_LBA48) { 375 sect = 0; 376 cyl = 0; 377 head = 0; 378 } else if (ata_bio->flags & ATA_LBA) { 379 sect = (ata_bio->blkno >> 0) & 0xff; 380 cyl = (ata_bio->blkno >> 8) & 0xffff; 381 head = (ata_bio->blkno >> 24) & 0x0f; 382 head |= WDSD_LBA; 383 } else { 384 int blkno = ata_bio->blkno; 385 sect = blkno % ata_bio->lp->d_nsectors; 386 sect++; /* Sectors begin with 1, not 0. */ 387 blkno /= ata_bio->lp->d_nsectors; 388 head = blkno % ata_bio->lp->d_ntracks; 389 blkno /= ata_bio->lp->d_ntracks; 390 cyl = blkno; 391 head |= WDSD_CHS; 392 } 393 if (xfer->c_flags & C_DMA) { 394 ata_bio->nblks = nblks; 395 ata_bio->nbytes = xfer->c_bcount; 396 cmd = (ata_bio->flags & ATA_READ) ? 397 WDCC_READDMA : WDCC_WRITEDMA; 398 /* Init the DMA channel. */ 399 if ((*wdc->dma_init)(wdc->dma_arg, 400 chp->ch_channel, xfer->c_drive, 401 (char *)xfer->c_databuf + xfer->c_skip, 402 ata_bio->nbytes, dma_flags) != 0) { 403 ata_bio->error = ERR_DMA; 404 ata_bio->r_error = 0; 405 wdc_ata_bio_done(chp, xfer); 406 return; 407 } 408 /* Initiate command */ 409 if (wdc->select) 410 wdc->select(chp, xfer->c_drive); 411 bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 412 0, WDSD_IBM | (xfer->c_drive << 4)); 413 switch(wdc_wait_for_ready(chp, ATA_DELAY, wait_flags)) { 414 case WDCWAIT_OK: 415 break; 416 case WDCWAIT_TOUT: 417 goto timeout; 418 case WDCWAIT_THR: 419 return; 420 } 421 if (ata_bio->flags & ATA_LBA48) { 422 wdccommandext(chp, xfer->c_drive, atacmd_to48(cmd), 423 (u_int64_t)ata_bio->blkno, nblks); 424 } else { 425 wdccommand(chp, xfer->c_drive, cmd, cyl, 426 head, sect, nblks, 0); 427 } 428 /* start the DMA channel */ 429 (*wdc->dma_start)(wdc->dma_arg, 430 chp->ch_channel, xfer->c_drive); 431 chp->ch_flags |= ATACH_DMA_WAIT; 432 /* start timeout machinery */ 433 if ((xfer->c_flags & C_POLL) == 0) 434 callout_reset(&chp->ch_callout, 435 ATA_DELAY / 1000 * hz, wdctimeout, chp); 436 /* wait for irq */ 437 goto intr; 438 } /* else not DMA */ 439 ata_bio->nblks = min(nblks, ata_bio->multi); 440 ata_bio->nbytes = ata_bio->nblks * ata_bio->lp->d_secsize; 441 KASSERT(nblks == 1 || (ata_bio->flags & ATA_SINGLE) == 0); 442 if (ata_bio->nblks > 1) { 443 cmd = (ata_bio->flags & ATA_READ) ? 444 WDCC_READMULTI : WDCC_WRITEMULTI; 445 } else { 446 cmd = (ata_bio->flags & ATA_READ) ? 447 WDCC_READ : WDCC_WRITE; 448 } 449 /* Initiate command! */ 450 if (wdc->select) 451 wdc->select(chp, xfer->c_drive); 452 bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, 453 WDSD_IBM | (xfer->c_drive << 4)); 454 switch(wdc_wait_for_ready(chp, ATA_DELAY, wait_flags)) { 455 case WDCWAIT_OK: 456 break; 457 case WDCWAIT_TOUT: 458 goto timeout; 459 case WDCWAIT_THR: 460 return; 461 } 462 if (ata_bio->flags & ATA_LBA48) { 463 wdccommandext(chp, xfer->c_drive, atacmd_to48(cmd), 464 (u_int64_t) ata_bio->blkno, nblks); 465 } else { 466 wdccommand(chp, xfer->c_drive, cmd, cyl, 467 head, sect, nblks, 468 (ata_bio->lp->d_type == DTYPE_ST506) ? 469 ata_bio->lp->d_precompcyl / 4 : 0); 470 } 471 /* start timeout machinery */ 472 if ((xfer->c_flags & C_POLL) == 0) 473 callout_reset(&chp->ch_callout, 474 ATA_DELAY / 1000 * hz, wdctimeout, chp); 475 } else if (ata_bio->nblks > 1) { 476 /* The number of blocks in the last stretch may be smaller. */ 477 nblks = xfer->c_bcount / ata_bio->lp->d_secsize; 478 if (ata_bio->nblks > nblks) { 479 ata_bio->nblks = nblks; 480 ata_bio->nbytes = xfer->c_bcount; 481 } 482 } 483 /* If this was a write and not using DMA, push the data. */ 484 if ((ata_bio->flags & ATA_READ) == 0) { 485 /* 486 * we have to busy-wait here, we can't rely on running in 487 * thread context. 488 */ 489 if (wdc_wait_for_drq(chp, ATA_DELAY, AT_POLL) != 0) { 490 printf("%s:%d:%d: timeout waiting for DRQ, " 491 "st=0x%02x, err=0x%02x\n", 492 atac->atac_dev.dv_xname, chp->ch_channel, 493 xfer->c_drive, chp->ch_status, chp->ch_error); 494 if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) 495 ata_bio->error = TIMEOUT; 496 wdc_ata_bio_done(chp, xfer); 497 return; 498 } 499 if (wdc_ata_err(drvp, ata_bio) == WDC_ATA_ERR) { 500 wdc_ata_bio_done(chp, xfer); 501 return; 502 } 503 wdc->dataout_pio(chp, drvp->drive_flags, 504 (char *)xfer->c_databuf + xfer->c_skip, ata_bio->nbytes); 505 } 506 507 intr: /* Wait for IRQ (either real or polled) */ 508 if ((ata_bio->flags & ATA_POLL) == 0) { 509 chp->ch_flags |= ATACH_IRQ_WAIT; 510 } else { 511 /* Wait for at last 400ns for status bit to be valid */ 512 delay(1); 513 if (chp->ch_flags & ATACH_DMA_WAIT) { 514 wdc_dmawait(chp, xfer, ATA_DELAY); 515 chp->ch_flags &= ~ATACH_DMA_WAIT; 516 } 517 wdc_ata_bio_intr(chp, xfer, 0); 518 if ((ata_bio->flags & ATA_ITSDONE) == 0) 519 goto again; 520 } 521 return; 522 timeout: 523 printf("%s:%d:%d: not ready, st=0x%02x, err=0x%02x\n", 524 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 525 chp->ch_status, chp->ch_error); 526 if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) 527 ata_bio->error = TIMEOUT; 528 wdc_ata_bio_done(chp, xfer); 529 return; 530 } 531 532 static int 533 wdc_ata_bio_intr(struct ata_channel *chp, struct ata_xfer *xfer, int irq) 534 { 535 struct atac_softc *atac = chp->ch_atac; 536 struct wdc_softc *wdc = CHAN_TO_WDC(chp); 537 struct ata_bio *ata_bio = xfer->c_cmd; 538 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 539 int drv_err; 540 541 ATADEBUG_PRINT(("wdc_ata_bio_intr %s:%d:%d\n", 542 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive), 543 DEBUG_INTR | DEBUG_XFERS); 544 545 546 /* Is it not a transfer, but a control operation? */ 547 if (drvp->state < READY) { 548 printf("%s:%d:%d: bad state %d in wdc_ata_bio_intr\n", 549 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 550 drvp->state); 551 panic("wdc_ata_bio_intr: bad state"); 552 } 553 554 /* 555 * if we missed an interrupt in a PIO transfer, reset and restart. 556 * Don't try to continue transfer, we may have missed cycles. 557 */ 558 if ((xfer->c_flags & (C_TIMEOU | C_DMA)) == C_TIMEOU) { 559 ata_bio->error = TIMEOUT; 560 wdc_ata_bio_done(chp, xfer); 561 return 1; 562 } 563 564 /* Ack interrupt done by wdc_wait_for_unbusy */ 565 if (wdc_wait_for_unbusy(chp, (irq == 0) ? ATA_DELAY : 0, AT_POLL) < 0) { 566 if (irq && (xfer->c_flags & C_TIMEOU) == 0) 567 return 0; /* IRQ was not for us */ 568 printf("%s:%d:%d: device timeout, c_bcount=%d, c_skip%d\n", 569 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 570 xfer->c_bcount, xfer->c_skip); 571 ata_bio->error = TIMEOUT; 572 wdc_ata_bio_done(chp, xfer); 573 return 1; 574 } 575 if (wdc->irqack) 576 wdc->irqack(chp); 577 578 drv_err = wdc_ata_err(drvp, ata_bio); 579 580 /* If we were using DMA, Turn off the DMA channel and check for error */ 581 if (xfer->c_flags & C_DMA) { 582 if (ata_bio->flags & ATA_POLL) { 583 /* 584 * IDE drives deassert WDCS_BSY before transfer is 585 * complete when using DMA. Polling for DRQ to deassert 586 * is not enough DRQ is not required to be 587 * asserted for DMA transfers, so poll for DRDY. 588 */ 589 if (wdcwait(chp, WDCS_DRDY | WDCS_DRQ, WDCS_DRDY, 590 ATA_DELAY, ATA_POLL) == WDCWAIT_TOUT) { 591 printf("%s:%d:%d: polled transfer timed out " 592 "(st=0x%x)\n", atac->atac_dev.dv_xname, 593 chp->ch_channel, xfer->c_drive, 594 chp->ch_status); 595 ata_bio->error = TIMEOUT; 596 drv_err = WDC_ATA_ERR; 597 } 598 } 599 if (wdc->dma_status != 0) { 600 if (drv_err != WDC_ATA_ERR) { 601 ata_bio->error = ERR_DMA; 602 drv_err = WDC_ATA_ERR; 603 } 604 } 605 if (chp->ch_status & WDCS_DRQ) { 606 if (drv_err != WDC_ATA_ERR) { 607 printf("%s:%d:%d: intr with DRQ (st=0x%x)\n", 608 atac->atac_dev.dv_xname, chp->ch_channel, 609 xfer->c_drive, chp->ch_status); 610 ata_bio->error = TIMEOUT; 611 drv_err = WDC_ATA_ERR; 612 } 613 } 614 if (ata_bio->r_error & WDCE_CRC) 615 ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); 616 if (drv_err != WDC_ATA_ERR) 617 goto end; 618 } 619 620 /* if we had an error, end */ 621 if (drv_err == WDC_ATA_ERR) { 622 wdc_ata_bio_done(chp, xfer); 623 return 1; 624 } 625 626 /* If this was a read and not using DMA, fetch the data. */ 627 if ((ata_bio->flags & ATA_READ) != 0) { 628 if ((chp->ch_status & WDCS_DRQ) != WDCS_DRQ) { 629 printf("%s:%d:%d: read intr before drq\n", 630 atac->atac_dev.dv_xname, chp->ch_channel, 631 xfer->c_drive); 632 ata_bio->error = TIMEOUT; 633 wdc_ata_bio_done(chp, xfer); 634 return 1; 635 } 636 wdc->datain_pio(chp, drvp->drive_flags, 637 (char *)xfer->c_databuf + xfer->c_skip, ata_bio->nbytes); 638 } 639 640 end: 641 ata_bio->blkno += ata_bio->nblks; 642 ata_bio->blkdone += ata_bio->nblks; 643 xfer->c_skip += ata_bio->nbytes; 644 xfer->c_bcount -= ata_bio->nbytes; 645 /* See if this transfer is complete. */ 646 if (xfer->c_bcount > 0) { 647 if ((ata_bio->flags & ATA_POLL) == 0) { 648 /* Start the next operation */ 649 _wdc_ata_bio_start(chp, xfer); 650 } else { 651 /* Let _wdc_ata_bio_start do the loop */ 652 return 1; 653 } 654 } else { /* Done with this transfer */ 655 ata_bio->error = NOERROR; 656 wdc_ata_bio_done(chp, xfer); 657 } 658 return 1; 659 } 660 661 static void 662 wdc_ata_bio_kill_xfer(struct ata_channel *chp, struct ata_xfer *xfer, 663 int reason) 664 { 665 struct ata_bio *ata_bio = xfer->c_cmd; 666 int drive = xfer->c_drive; 667 668 ata_free_xfer(chp, xfer); 669 670 ata_bio->flags |= ATA_ITSDONE; 671 switch (reason) { 672 case KILL_GONE: 673 ata_bio->error = ERR_NODEV; 674 break; 675 case KILL_RESET: 676 ata_bio->error = ERR_RESET; 677 break; 678 default: 679 printf("wdc_ata_bio_kill_xfer: unknown reason %d\n", 680 reason); 681 panic("wdc_ata_bio_kill_xfer"); 682 } 683 ata_bio->r_error = WDCE_ABRT; 684 ATADEBUG_PRINT(("wdc_ata_done: drv_done\n"), DEBUG_XFERS); 685 (*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc); 686 } 687 688 static void 689 wdc_ata_bio_done(struct ata_channel *chp, struct ata_xfer *xfer) 690 { 691 struct atac_softc *atac = chp->ch_atac; 692 struct ata_bio *ata_bio = xfer->c_cmd; 693 int drive = xfer->c_drive; 694 695 ATADEBUG_PRINT(("wdc_ata_bio_done %s:%d:%d: flags 0x%x\n", 696 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 697 (u_int)xfer->c_flags), 698 DEBUG_XFERS); 699 700 callout_stop(&chp->ch_callout); 701 702 /* feed back residual bcount to our caller */ 703 ata_bio->bcount = xfer->c_bcount; 704 705 /* mark controller inactive and free xfer */ 706 chp->ch_queue->active_xfer = NULL; 707 ata_free_xfer(chp, xfer); 708 709 if (chp->ch_drive[drive].drive_flags & DRIVE_WAITDRAIN) { 710 ata_bio->error = ERR_NODEV; 711 chp->ch_drive[drive].drive_flags &= ~DRIVE_WAITDRAIN; 712 wakeup(&chp->ch_queue->active_xfer); 713 } 714 ata_bio->flags |= ATA_ITSDONE; 715 ATADEBUG_PRINT(("wdc_ata_done: drv_done\n"), DEBUG_XFERS); 716 (*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc); 717 ATADEBUG_PRINT(("atastart from wdc_ata_done, flags 0x%x\n", 718 chp->ch_flags), DEBUG_XFERS); 719 atastart(chp); 720 } 721 722 static int 723 wdc_ata_err(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) 724 { 725 struct ata_channel *chp = drvp->chnl_softc; 726 ata_bio->error = 0; 727 if (chp->ch_status & WDCS_BSY) { 728 ata_bio->error = TIMEOUT; 729 return WDC_ATA_ERR; 730 } 731 732 if (chp->ch_status & WDCS_DWF) { 733 ata_bio->error = ERR_DF; 734 return WDC_ATA_ERR; 735 } 736 737 if (chp->ch_status & WDCS_ERR) { 738 ata_bio->error = ERROR; 739 ata_bio->r_error = chp->ch_error; 740 if (ata_bio->r_error & (WDCE_BBK | WDCE_UNC | WDCE_IDNF | 741 WDCE_ABRT | WDCE_TK0NF | WDCE_AMNF)) 742 return WDC_ATA_ERR; 743 return WDC_ATA_NOERR; 744 } 745 746 if (chp->ch_status & WDCS_CORR) 747 ata_bio->flags |= ATA_CORR; 748 return WDC_ATA_NOERR; 749 } 750 751 static int 752 wdc_ata_addref(struct ata_drive_datas *drvp) 753 { 754 struct ata_channel *chp = drvp->chnl_softc; 755 756 return (ata_addref(chp)); 757 } 758 759 static void 760 wdc_ata_delref(struct ata_drive_datas *drvp) 761 { 762 struct ata_channel *chp = drvp->chnl_softc; 763 764 ata_delref(chp); 765 } 766
Indexes created Mon Sep 29 15:09:53 GMT 2025