ata_wdc.c revision 1.72
1 /* $NetBSD: ata_wdc.c,v 1.72 2004/08/14 15:08:04 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 1.72 2004/08/14 15:08:04 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_exec_command, 137 ata_get_params, 138 wdc_ata_addref, 139 wdc_ata_delref, 140 ata_kill_pending, 141 }; 142 143 /* 144 * Convert a 32 bit command to a 48 bit command. 145 */ 146 static __inline 147 int to48(int cmd32) 148 { 149 switch (cmd32) { 150 case WDCC_READ: 151 return WDCC_READ_EXT; 152 case WDCC_WRITE: 153 return WDCC_WRITE_EXT; 154 case WDCC_READMULTI: 155 return WDCC_READMULTI_EXT; 156 case WDCC_WRITEMULTI: 157 return WDCC_WRITEMULTI_EXT; 158 case WDCC_READDMA: 159 return WDCC_READDMA_EXT; 160 case WDCC_WRITEDMA: 161 return WDCC_WRITEDMA_EXT; 162 default: 163 panic("ata_wdc: illegal 32 bit command %d", cmd32); 164 /*NOTREACHED*/ 165 } 166 } 167 168 /* 169 * Handle block I/O operation. Return ATACMD_COMPLETE, ATACMD_QUEUED, or 170 * ATACMD_TRY_AGAIN. Must be called at splbio(). 171 */ 172 static int 173 wdc_ata_bio(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) 174 { 175 struct ata_xfer *xfer; 176 struct ata_channel *chp = drvp->chnl_softc; 177 struct wdc_softc *wdc = chp->ch_wdc; 178 179 xfer = ata_get_xfer(ATAXF_NOSLEEP); 180 if (xfer == NULL) 181 return ATACMD_TRY_AGAIN; 182 if (wdc->cap & WDC_CAPABILITY_NOIRQ) 183 ata_bio->flags |= ATA_POLL; 184 if (ata_bio->flags & ATA_POLL) 185 xfer->c_flags |= C_POLL; 186 if ((drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA)) && 187 (ata_bio->flags & ATA_SINGLE) == 0) 188 xfer->c_flags |= C_DMA; 189 xfer->c_drive = drvp->drive; 190 xfer->c_cmd = ata_bio; 191 xfer->c_databuf = ata_bio->databuf; 192 xfer->c_bcount = ata_bio->bcount; 193 xfer->c_start = wdc_ata_bio_start; 194 xfer->c_intr = wdc_ata_bio_intr; 195 xfer->c_kill_xfer = wdc_ata_bio_kill_xfer; 196 ata_exec_xfer(chp, xfer); 197 return (ata_bio->flags & ATA_ITSDONE) ? ATACMD_COMPLETE : ATACMD_QUEUED; 198 } 199 200 static void 201 wdc_ata_bio_start(struct ata_channel *chp, struct ata_xfer *xfer) 202 { 203 struct wdc_softc *wdc = chp->ch_wdc; 204 struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; 205 struct ata_bio *ata_bio = xfer->c_cmd; 206 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 207 int wait_flags = (xfer->c_flags & C_POLL) ? AT_POLL : 0; 208 char *errstring; 209 210 ATADEBUG_PRINT(("wdc_ata_bio_start %s:%d:%d\n", 211 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive), 212 DEBUG_XFERS); 213 214 /* Do control operations specially. */ 215 if (__predict_false(drvp->state < READY)) { 216 /* 217 * Actually, we want to be careful not to mess with the control 218 * state if the device is currently busy, but we can assume 219 * that we never get to this point if that's the case. 220 */ 221 /* If it's not a polled command, we need the kenrel thread */ 222 if ((xfer->c_flags & C_POLL) == 0 && 223 (chp->ch_flags & ATACH_TH_RUN) == 0) { 224 chp->ch_queue->queue_freeze++; 225 wakeup(&chp->ch_thread); 226 return; 227 } 228 /* 229 * disable interrupts, all commands here should be quick 230 * enouth to be able to poll, and we don't go here that often 231 */ 232 bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, 233 WDCTL_4BIT | WDCTL_IDS); 234 if (wdc->select) 235 wdc->select(chp, xfer->c_drive); 236 bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, 237 WDSD_IBM | (xfer->c_drive << 4)); 238 DELAY(10); 239 errstring = "wait"; 240 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 241 goto ctrltimeout; 242 wdccommandshort(chp, xfer->c_drive, WDCC_RECAL); 243 /* Wait for at last 400ns for status bit to be valid */ 244 DELAY(1); 245 errstring = "recal"; 246 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 247 goto ctrltimeout; 248 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 249 goto ctrlerror; 250 /* Don't try to set modes if controller can't be adjusted */ 251 if (wdc->set_modes == NULL) 252 goto geometry; 253 /* Also don't try if the drive didn't report its mode */ 254 if ((drvp->drive_flags & DRIVE_MODE) == 0) 255 goto geometry; 256 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 257 0x08 | drvp->PIO_mode, WDSF_SET_MODE); 258 errstring = "piomode"; 259 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 260 goto ctrltimeout; 261 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 262 goto ctrlerror; 263 if (drvp->drive_flags & DRIVE_UDMA) { 264 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 265 0x40 | drvp->UDMA_mode, WDSF_SET_MODE); 266 } else if (drvp->drive_flags & DRIVE_DMA) { 267 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 268 0x20 | drvp->DMA_mode, WDSF_SET_MODE); 269 } else { 270 goto geometry; 271 } 272 errstring = "dmamode"; 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 geometry: 278 if (ata_bio->flags & ATA_LBA) 279 goto multimode; 280 wdccommand(chp, xfer->c_drive, WDCC_IDP, 281 ata_bio->lp->d_ncylinders, 282 ata_bio->lp->d_ntracks - 1, 0, ata_bio->lp->d_nsectors, 283 (ata_bio->lp->d_type == DTYPE_ST506) ? 284 ata_bio->lp->d_precompcyl / 4 : 0); 285 errstring = "geometry"; 286 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 287 goto ctrltimeout; 288 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 289 goto ctrlerror; 290 multimode: 291 if (ata_bio->multi == 1) 292 goto ready; 293 wdccommand(chp, xfer->c_drive, WDCC_SETMULTI, 0, 0, 0, 294 ata_bio->multi, 0); 295 errstring = "setmulti"; 296 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 297 goto ctrltimeout; 298 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 299 goto ctrlerror; 300 ready: 301 drvp->state = READY; 302 /* 303 * The drive is usable now 304 */ 305 bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, 306 WDCTL_4BIT); 307 delay(10); /* some drives need a little delay here */ 308 } 309 310 _wdc_ata_bio_start(chp, xfer); 311 return; 312 ctrltimeout: 313 printf("%s:%d:%d: %s timed out\n", 314 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 315 errstring); 316 ata_bio->error = TIMEOUT; 317 goto ctrldone; 318 ctrlerror: 319 printf("%s:%d:%d: %s ", 320 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 321 errstring); 322 if (chp->ch_status & WDCS_DWF) { 323 printf("drive fault\n"); 324 ata_bio->error = ERR_DF; 325 } else { 326 printf("error (%x)\n", chp->ch_error); 327 ata_bio->r_error = chp->ch_error; 328 ata_bio->error = ERROR; 329 } 330 ctrldone: 331 drvp->state = 0; 332 wdc_ata_bio_done(chp, xfer); 333 bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); 334 return; 335 } 336 337 static void 338 _wdc_ata_bio_start(struct ata_channel *chp, struct ata_xfer *xfer) 339 { 340 struct wdc_softc *wdc = chp->ch_wdc; 341 struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; 342 struct ata_bio *ata_bio = xfer->c_cmd; 343 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 344 int wait_flags = (xfer->c_flags & C_POLL) ? AT_POLL : 0; 345 u_int16_t cyl; 346 u_int8_t head, sect, cmd = 0; 347 int nblks; 348 int dma_flags = 0; 349 350 ATADEBUG_PRINT(("_wdc_ata_bio_start %s:%d:%d\n", 351 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive), 352 DEBUG_INTR | DEBUG_XFERS); 353 354 if (xfer->c_flags & C_DMA) { 355 if (drvp->n_xfers <= NXFER) 356 drvp->n_xfers++; 357 dma_flags = (ata_bio->flags & ATA_READ) ? WDC_DMA_READ : 0; 358 if (ata_bio->flags & ATA_LBA48) 359 dma_flags |= WDC_DMA_LBA48; 360 } 361 again: 362 /* 363 * 364 * When starting a multi-sector transfer, or doing single-sector 365 * transfers... 366 */ 367 if (xfer->c_skip == 0 || (ata_bio->flags & ATA_SINGLE) != 0) { 368 if (ata_bio->flags & ATA_SINGLE) 369 nblks = 1; 370 else 371 nblks = xfer->c_bcount / ata_bio->lp->d_secsize; 372 /* Check for bad sectors and adjust transfer, if necessary. */ 373 if ((ata_bio->lp->d_flags & D_BADSECT) != 0) { 374 long blkdiff; 375 int i; 376 for (i = 0; (blkdiff = ata_bio->badsect[i]) != -1; 377 i++) { 378 blkdiff -= ata_bio->blkno; 379 if (blkdiff < 0) 380 continue; 381 if (blkdiff == 0) { 382 /* Replace current block of transfer. */ 383 ata_bio->blkno = 384 ata_bio->lp->d_secperunit - 385 ata_bio->lp->d_nsectors - i - 1; 386 } 387 if (blkdiff < nblks) { 388 /* Bad block inside transfer. */ 389 ata_bio->flags |= ATA_SINGLE; 390 nblks = 1; 391 } 392 break; 393 } 394 /* Transfer is okay now. */ 395 } 396 if (ata_bio->flags & ATA_LBA48) { 397 sect = 0; 398 cyl = 0; 399 head = 0; 400 } else if (ata_bio->flags & ATA_LBA) { 401 sect = (ata_bio->blkno >> 0) & 0xff; 402 cyl = (ata_bio->blkno >> 8) & 0xffff; 403 head = (ata_bio->blkno >> 24) & 0x0f; 404 head |= WDSD_LBA; 405 } else { 406 int blkno = ata_bio->blkno; 407 sect = blkno % ata_bio->lp->d_nsectors; 408 sect++; /* Sectors begin with 1, not 0. */ 409 blkno /= ata_bio->lp->d_nsectors; 410 head = blkno % ata_bio->lp->d_ntracks; 411 blkno /= ata_bio->lp->d_ntracks; 412 cyl = blkno; 413 head |= WDSD_CHS; 414 } 415 if (xfer->c_flags & C_DMA) { 416 ata_bio->nblks = nblks; 417 ata_bio->nbytes = xfer->c_bcount; 418 cmd = (ata_bio->flags & ATA_READ) ? 419 WDCC_READDMA : WDCC_WRITEDMA; 420 /* Init the DMA channel. */ 421 if ((*wdc->dma_init)(wdc->dma_arg, 422 chp->ch_channel, xfer->c_drive, 423 (char *)xfer->c_databuf + xfer->c_skip, 424 ata_bio->nbytes, dma_flags) != 0) { 425 ata_bio->error = ERR_DMA; 426 ata_bio->r_error = 0; 427 wdc_ata_bio_done(chp, xfer); 428 return; 429 } 430 /* Initiate command */ 431 if (wdc->select) 432 wdc->select(chp, xfer->c_drive); 433 bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 434 0, WDSD_IBM | (xfer->c_drive << 4)); 435 switch(wdc_wait_for_ready(chp, ATA_DELAY, wait_flags)) { 436 case WDCWAIT_OK: 437 break; 438 case WDCWAIT_TOUT: 439 goto timeout; 440 case WDCWAIT_THR: 441 return; 442 } 443 if (ata_bio->flags & ATA_LBA48) { 444 wdccommandext(chp, xfer->c_drive, to48(cmd), 445 (u_int64_t)ata_bio->blkno, nblks); 446 } else { 447 wdccommand(chp, xfer->c_drive, cmd, cyl, 448 head, sect, nblks, 0); 449 } 450 /* start the DMA channel */ 451 (*wdc->dma_start)(wdc->dma_arg, 452 chp->ch_channel, xfer->c_drive); 453 chp->ch_flags |= ATACH_DMA_WAIT; 454 /* start timeout machinery */ 455 if ((xfer->c_flags & C_POLL) == 0) 456 callout_reset(&chp->ch_callout, 457 ATA_DELAY / 1000 * hz, wdctimeout, chp); 458 /* wait for irq */ 459 goto intr; 460 } /* else not DMA */ 461 ata_bio->nblks = min(nblks, ata_bio->multi); 462 ata_bio->nbytes = ata_bio->nblks * ata_bio->lp->d_secsize; 463 KASSERT(nblks == 1 || (ata_bio->flags & ATA_SINGLE) == 0); 464 if (ata_bio->nblks > 1) { 465 cmd = (ata_bio->flags & ATA_READ) ? 466 WDCC_READMULTI : WDCC_WRITEMULTI; 467 } else { 468 cmd = (ata_bio->flags & ATA_READ) ? 469 WDCC_READ : WDCC_WRITE; 470 } 471 /* Initiate command! */ 472 if (wdc->select) 473 wdc->select(chp, xfer->c_drive); 474 bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, 475 WDSD_IBM | (xfer->c_drive << 4)); 476 switch(wdc_wait_for_ready(chp, ATA_DELAY, wait_flags)) { 477 case WDCWAIT_OK: 478 break; 479 case WDCWAIT_TOUT: 480 goto timeout; 481 case WDCWAIT_THR: 482 return; 483 } 484 if (ata_bio->flags & ATA_LBA48) { 485 wdccommandext(chp, xfer->c_drive, to48(cmd), 486 (u_int64_t) ata_bio->blkno, nblks); 487 } else { 488 wdccommand(chp, xfer->c_drive, cmd, cyl, 489 head, sect, nblks, 490 (ata_bio->lp->d_type == DTYPE_ST506) ? 491 ata_bio->lp->d_precompcyl / 4 : 0); 492 } 493 /* start timeout machinery */ 494 if ((xfer->c_flags & C_POLL) == 0) 495 callout_reset(&chp->ch_callout, 496 ATA_DELAY / 1000 * hz, wdctimeout, chp); 497 } else if (ata_bio->nblks > 1) { 498 /* The number of blocks in the last stretch may be smaller. */ 499 nblks = xfer->c_bcount / ata_bio->lp->d_secsize; 500 if (ata_bio->nblks > nblks) { 501 ata_bio->nblks = nblks; 502 ata_bio->nbytes = xfer->c_bcount; 503 } 504 } 505 /* If this was a write and not using DMA, push the data. */ 506 if ((ata_bio->flags & ATA_READ) == 0) { 507 /* 508 * we have to busy-wait here, we can't rely on running in 509 * thread context. 510 */ 511 if (wdc_wait_for_drq(chp, ATA_DELAY, AT_POLL) != 0) { 512 printf("%s:%d:%d: timeout waiting for DRQ, " 513 "st=0x%02x, err=0x%02x\n", 514 wdc->sc_dev.dv_xname, chp->ch_channel, 515 xfer->c_drive, chp->ch_status, chp->ch_error); 516 if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) 517 ata_bio->error = TIMEOUT; 518 wdc_ata_bio_done(chp, xfer); 519 return; 520 } 521 if (wdc_ata_err(drvp, ata_bio) == WDC_ATA_ERR) { 522 wdc_ata_bio_done(chp, xfer); 523 return; 524 } 525 wdc->dataout_pio(chp, drvp->drive_flags, 526 (char *)xfer->c_databuf + xfer->c_skip, ata_bio->nbytes); 527 } 528 529 intr: /* Wait for IRQ (either real or polled) */ 530 if ((ata_bio->flags & ATA_POLL) == 0) { 531 chp->ch_flags |= ATACH_IRQ_WAIT; 532 } else { 533 /* Wait for at last 400ns for status bit to be valid */ 534 delay(1); 535 if (chp->ch_flags & ATACH_DMA_WAIT) { 536 wdc_dmawait(chp, xfer, ATA_DELAY); 537 chp->ch_flags &= ~ATACH_DMA_WAIT; 538 } 539 wdc_ata_bio_intr(chp, xfer, 0); 540 if ((ata_bio->flags & ATA_ITSDONE) == 0) 541 goto again; 542 } 543 return; 544 timeout: 545 printf("%s:%d:%d: not ready, st=0x%02x, err=0x%02x\n", 546 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 547 chp->ch_status, chp->ch_error); 548 if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) 549 ata_bio->error = TIMEOUT; 550 wdc_ata_bio_done(chp, xfer); 551 return; 552 } 553 554 static int 555 wdc_ata_bio_intr(struct ata_channel *chp, struct ata_xfer *xfer, int irq) 556 { 557 struct wdc_softc *wdc = chp->ch_wdc; 558 struct ata_bio *ata_bio = xfer->c_cmd; 559 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 560 int drv_err; 561 562 ATADEBUG_PRINT(("wdc_ata_bio_intr %s:%d:%d\n", 563 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive), 564 DEBUG_INTR | DEBUG_XFERS); 565 566 567 /* Is it not a transfer, but a control operation? */ 568 if (drvp->state < READY) { 569 printf("%s:%d:%d: bad state %d in wdc_ata_bio_intr\n", 570 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 571 drvp->state); 572 panic("wdc_ata_bio_intr: bad state"); 573 } 574 575 /* 576 * if we missed an interrupt in a PIO transfer, reset and restart. 577 * Don't try to continue transfer, we may have missed cycles. 578 */ 579 if ((xfer->c_flags & (C_TIMEOU | C_DMA)) == C_TIMEOU) { 580 ata_bio->error = TIMEOUT; 581 wdc_ata_bio_done(chp, xfer); 582 return 1; 583 } 584 585 /* Ack interrupt done by wdc_wait_for_unbusy */ 586 if (wdc_wait_for_unbusy(chp, (irq == 0) ? ATA_DELAY : 0, AT_POLL) < 0) { 587 if (irq && (xfer->c_flags & C_TIMEOU) == 0) 588 return 0; /* IRQ was not for us */ 589 printf("%s:%d:%d: device timeout, c_bcount=%d, c_skip%d\n", 590 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 591 xfer->c_bcount, xfer->c_skip); 592 ata_bio->error = TIMEOUT; 593 wdc_ata_bio_done(chp, xfer); 594 return 1; 595 } 596 if (wdc->irqack) 597 wdc->irqack(chp); 598 599 drv_err = wdc_ata_err(drvp, ata_bio); 600 601 /* If we were using DMA, Turn off the DMA channel and check for error */ 602 if (xfer->c_flags & C_DMA) { 603 if (ata_bio->flags & ATA_POLL) { 604 /* 605 * IDE drives deassert WDCS_BSY before transfer is 606 * complete when using DMA. Polling for DRQ to deassert 607 * is not enough DRQ is not required to be 608 * asserted for DMA transfers, so poll for DRDY. 609 */ 610 if (wdcwait(chp, WDCS_DRDY | WDCS_DRQ, WDCS_DRDY, 611 ATA_DELAY, ATA_POLL) == WDCWAIT_TOUT) { 612 printf("%s:%d:%d: polled transfer timed out " 613 "(st=0x%x)\n", wdc->sc_dev.dv_xname, 614 chp->ch_channel, xfer->c_drive, 615 chp->ch_status); 616 ata_bio->error = TIMEOUT; 617 drv_err = WDC_ATA_ERR; 618 } 619 } 620 if (wdc->dma_status != 0) { 621 if (drv_err != WDC_ATA_ERR) { 622 ata_bio->error = ERR_DMA; 623 drv_err = WDC_ATA_ERR; 624 } 625 } 626 if (chp->ch_status & WDCS_DRQ) { 627 if (drv_err != WDC_ATA_ERR) { 628 printf("%s:%d:%d: intr with DRQ (st=0x%x)\n", 629 wdc->sc_dev.dv_xname, chp->ch_channel, 630 xfer->c_drive, chp->ch_status); 631 ata_bio->error = TIMEOUT; 632 drv_err = WDC_ATA_ERR; 633 } 634 } 635 if (ata_bio->r_error & WDCE_CRC) 636 ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); 637 if (drv_err != WDC_ATA_ERR) 638 goto end; 639 } 640 641 /* if we had an error, end */ 642 if (drv_err == WDC_ATA_ERR) { 643 wdc_ata_bio_done(chp, xfer); 644 return 1; 645 } 646 647 /* If this was a read and not using DMA, fetch the data. */ 648 if ((ata_bio->flags & ATA_READ) != 0) { 649 if ((chp->ch_status & WDCS_DRQ) != WDCS_DRQ) { 650 printf("%s:%d:%d: read intr before drq\n", 651 wdc->sc_dev.dv_xname, chp->ch_channel, 652 xfer->c_drive); 653 ata_bio->error = TIMEOUT; 654 wdc_ata_bio_done(chp, xfer); 655 return 1; 656 } 657 wdc->datain_pio(chp, drvp->drive_flags, 658 (char *)xfer->c_databuf + xfer->c_skip, ata_bio->nbytes); 659 } 660 661 end: 662 ata_bio->blkno += ata_bio->nblks; 663 ata_bio->blkdone += ata_bio->nblks; 664 xfer->c_skip += ata_bio->nbytes; 665 xfer->c_bcount -= ata_bio->nbytes; 666 /* See if this transfer is complete. */ 667 if (xfer->c_bcount > 0) { 668 if ((ata_bio->flags & ATA_POLL) == 0) { 669 /* Start the next operation */ 670 _wdc_ata_bio_start(chp, xfer); 671 } else { 672 /* Let _wdc_ata_bio_start do the loop */ 673 return 1; 674 } 675 } else { /* Done with this transfer */ 676 ata_bio->error = NOERROR; 677 wdc_ata_bio_done(chp, xfer); 678 } 679 return 1; 680 } 681 682 static void 683 wdc_ata_bio_kill_xfer(struct ata_channel *chp, struct ata_xfer *xfer, 684 int reason) 685 { 686 struct ata_bio *ata_bio = xfer->c_cmd; 687 int drive = xfer->c_drive; 688 689 ata_free_xfer(chp, xfer); 690 691 ata_bio->flags |= ATA_ITSDONE; 692 switch (reason) { 693 case KILL_GONE: 694 ata_bio->error = ERR_NODEV; 695 break; 696 case KILL_RESET: 697 ata_bio->error = ERR_RESET; 698 break; 699 default: 700 printf("wdc_ata_bio_kill_xfer: unknown reason %d\n", 701 reason); 702 panic("wdc_ata_bio_kill_xfer"); 703 } 704 ata_bio->r_error = WDCE_ABRT; 705 ATADEBUG_PRINT(("wdc_ata_done: drv_done\n"), DEBUG_XFERS); 706 (*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc); 707 } 708 709 static void 710 wdc_ata_bio_done(struct ata_channel *chp, struct ata_xfer *xfer) 711 { 712 struct wdc_softc *wdc = chp->ch_wdc; 713 struct ata_bio *ata_bio = xfer->c_cmd; 714 int drive = xfer->c_drive; 715 716 ATADEBUG_PRINT(("wdc_ata_bio_done %s:%d:%d: flags 0x%x\n", 717 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 718 (u_int)xfer->c_flags), 719 DEBUG_XFERS); 720 721 callout_stop(&chp->ch_callout); 722 723 /* feed back residual bcount to our caller */ 724 ata_bio->bcount = xfer->c_bcount; 725 726 /* mark controller inactive and free xfer */ 727 chp->ch_queue->active_xfer = NULL; 728 ata_free_xfer(chp, xfer); 729 730 if (chp->ch_drive[drive].drive_flags & DRIVE_WAITDRAIN) { 731 ata_bio->error = ERR_NODEV; 732 chp->ch_drive[drive].drive_flags &= ~DRIVE_WAITDRAIN; 733 wakeup(&chp->ch_queue->active_xfer); 734 } 735 ata_bio->flags |= ATA_ITSDONE; 736 ATADEBUG_PRINT(("wdc_ata_done: drv_done\n"), DEBUG_XFERS); 737 (*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc); 738 ATADEBUG_PRINT(("atastart from wdc_ata_done, flags 0x%x\n", 739 chp->ch_flags), DEBUG_XFERS); 740 atastart(chp); 741 } 742 743 static int 744 wdc_ata_err(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) 745 { 746 struct ata_channel *chp = drvp->chnl_softc; 747 ata_bio->error = 0; 748 if (chp->ch_status & WDCS_BSY) { 749 ata_bio->error = TIMEOUT; 750 return WDC_ATA_ERR; 751 } 752 753 if (chp->ch_status & WDCS_DWF) { 754 ata_bio->error = ERR_DF; 755 return WDC_ATA_ERR; 756 } 757 758 if (chp->ch_status & WDCS_ERR) { 759 ata_bio->error = ERROR; 760 ata_bio->r_error = chp->ch_error; 761 if (ata_bio->r_error & (WDCE_BBK | WDCE_UNC | WDCE_IDNF | 762 WDCE_ABRT | WDCE_TK0NF | WDCE_AMNF)) 763 return WDC_ATA_ERR; 764 return WDC_ATA_NOERR; 765 } 766 767 if (chp->ch_status & WDCS_CORR) 768 ata_bio->flags |= ATA_CORR; 769 return WDC_ATA_NOERR; 770 } 771 772 static int 773 wdc_ata_addref(struct ata_drive_datas *drvp) 774 { 775 struct ata_channel *chp = drvp->chnl_softc; 776 777 return (ata_addref(chp)); 778 } 779 780 static void 781 wdc_ata_delref(struct ata_drive_datas *drvp) 782 { 783 struct ata_channel *chp = drvp->chnl_softc; 784 785 ata_delref(chp); 786 } 787
Indexes created Tue Sep 30 11:09:46 GMT 2025