ata_wdc.c revision 1.60
1 /* $NetBSD: ata_wdc.c,v 1.60 2004/08/04 18:24:10 bouyer 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 1.60 2004/08/04 18:24:10 bouyer Exp $"); 70 71 #ifndef WDCDEBUG 72 #define WDCDEBUG 73 #endif /* WDCDEBUG */ 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 WDCDEBUG 107 extern int wdcdebug_wd_mask; /* inited in wd.c */ 108 #define WDCDEBUG_PRINT(args, level) \ 109 if (wdcdebug_wd_mask & (level)) \ 110 printf args 111 #else 112 #define WDCDEBUG_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 wdc_channel *,struct ata_xfer *); 119 static void _wdc_ata_bio_start(struct wdc_channel *,struct ata_xfer *); 120 static int wdc_ata_bio_intr(struct wdc_channel *, struct ata_xfer *, 121 int); 122 static void wdc_ata_bio_kill_xfer(struct wdc_channel *, 123 struct ata_xfer *, int); 124 static void wdc_ata_bio_done(struct wdc_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 static void wdc_ata_kill_pending(struct ata_drive_datas *); 132 133 const struct ata_bustype wdc_ata_bustype = { 134 SCSIPI_BUSTYPE_ATA, 135 wdc_ata_bio, 136 wdc_reset_drive, 137 wdc_exec_command, 138 ata_get_params, 139 wdc_ata_addref, 140 wdc_ata_delref, 141 wdc_ata_kill_pending, 142 }; 143 144 /* 145 * Convert a 32 bit command to a 48 bit command. 146 */ 147 static __inline 148 int to48(int cmd32) 149 { 150 switch (cmd32) { 151 case WDCC_READ: 152 return WDCC_READ_EXT; 153 case WDCC_WRITE: 154 return WDCC_WRITE_EXT; 155 case WDCC_READMULTI: 156 return WDCC_READMULTI_EXT; 157 case WDCC_WRITEMULTI: 158 return WDCC_WRITEMULTI_EXT; 159 case WDCC_READDMA: 160 return WDCC_READDMA_EXT; 161 case WDCC_WRITEDMA: 162 return WDCC_WRITEDMA_EXT; 163 default: 164 panic("ata_wdc: illegal 32 bit command %d", cmd32); 165 /*NOTREACHED*/ 166 } 167 } 168 169 /* 170 * Handle block I/O operation. Return WDC_COMPLETE, WDC_QUEUED, or 171 * WDC_TRY_AGAIN. Must be called at splbio(). 172 */ 173 static int 174 wdc_ata_bio(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) 175 { 176 struct ata_xfer *xfer; 177 struct wdc_channel *chp = drvp->chnl_softc; 178 struct wdc_softc *wdc = chp->ch_wdc; 179 180 xfer = wdc_get_xfer(WDC_NOSLEEP); 181 if (xfer == NULL) 182 return WDC_TRY_AGAIN; 183 if (wdc->cap & WDC_CAPABILITY_NOIRQ) 184 ata_bio->flags |= ATA_POLL; 185 if (ata_bio->flags & ATA_POLL) 186 xfer->c_flags |= C_POLL; 187 if ((drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA)) && 188 (ata_bio->flags & ATA_SINGLE) == 0) 189 xfer->c_flags |= C_DMA; 190 xfer->c_drive = drvp->drive; 191 xfer->c_cmd = ata_bio; 192 xfer->c_databuf = ata_bio->databuf; 193 xfer->c_bcount = ata_bio->bcount; 194 xfer->c_start = wdc_ata_bio_start; 195 xfer->c_intr = wdc_ata_bio_intr; 196 xfer->c_kill_xfer = wdc_ata_bio_kill_xfer; 197 wdc_exec_xfer(chp, xfer); 198 return (ata_bio->flags & ATA_ITSDONE) ? WDC_COMPLETE : WDC_QUEUED; 199 } 200 201 static void 202 wdc_ata_bio_start(struct wdc_channel *chp, struct ata_xfer *xfer) 203 { 204 struct wdc_softc *wdc = chp->ch_wdc; 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 WDCDEBUG_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 & WDCF_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(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, 233 WDCTL_4BIT | WDCTL_IDS); 234 if (wdc->cap & WDC_CAPABILITY_SELECT) 235 wdc->select(chp, xfer->c_drive); 236 bus_space_write_1(chp->cmd_iot, chp->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->cap & WDC_CAPABILITY_MODE) == 0) 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(chp->ctl_iot, chp->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(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); 334 return; 335 } 336 337 static void 338 _wdc_ata_bio_start(struct wdc_channel *chp, struct ata_xfer *xfer) 339 { 340 struct wdc_softc *wdc = chp->ch_wdc; 341 struct ata_bio *ata_bio = xfer->c_cmd; 342 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 343 int wait_flags = (xfer->c_flags & C_POLL) ? AT_POLL : 0; 344 u_int16_t cyl; 345 u_int8_t head, sect, cmd = 0; 346 int nblks; 347 int dma_flags = 0; 348 349 WDCDEBUG_PRINT(("_wdc_ata_bio_start %s:%d:%d\n", 350 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive), 351 DEBUG_INTR | DEBUG_XFERS); 352 353 if (xfer->c_flags & C_DMA) { 354 if (drvp->n_xfers <= NXFER) 355 drvp->n_xfers++; 356 dma_flags = (ata_bio->flags & ATA_READ) ? WDC_DMA_READ : 0; 357 if (ata_bio->flags & ATA_LBA48) 358 dma_flags |= WDC_DMA_LBA48; 359 } 360 again: 361 /* 362 * 363 * When starting a multi-sector transfer, or doing single-sector 364 * transfers... 365 */ 366 if (xfer->c_skip == 0 || (ata_bio->flags & ATA_SINGLE) != 0) { 367 if (ata_bio->flags & ATA_SINGLE) 368 nblks = 1; 369 else 370 nblks = xfer->c_bcount / ata_bio->lp->d_secsize; 371 /* Check for bad sectors and adjust transfer, if necessary. */ 372 if ((ata_bio->lp->d_flags & D_BADSECT) != 0) { 373 long blkdiff; 374 int i; 375 for (i = 0; (blkdiff = ata_bio->badsect[i]) != -1; 376 i++) { 377 blkdiff -= ata_bio->blkno; 378 if (blkdiff < 0) 379 continue; 380 if (blkdiff == 0) { 381 /* Replace current block of transfer. */ 382 ata_bio->blkno = 383 ata_bio->lp->d_secperunit - 384 ata_bio->lp->d_nsectors - i - 1; 385 } 386 if (blkdiff < nblks) { 387 /* Bad block inside transfer. */ 388 ata_bio->flags |= ATA_SINGLE; 389 nblks = 1; 390 } 391 break; 392 } 393 /* Transfer is okay now. */ 394 } 395 if (ata_bio->flags & ATA_LBA48) { 396 sect = 0; 397 cyl = 0; 398 head = 0; 399 } else if (ata_bio->flags & ATA_LBA) { 400 sect = (ata_bio->blkno >> 0) & 0xff; 401 cyl = (ata_bio->blkno >> 8) & 0xffff; 402 head = (ata_bio->blkno >> 24) & 0x0f; 403 head |= WDSD_LBA; 404 } else { 405 int blkno = ata_bio->blkno; 406 sect = blkno % ata_bio->lp->d_nsectors; 407 sect++; /* Sectors begin with 1, not 0. */ 408 blkno /= ata_bio->lp->d_nsectors; 409 head = blkno % ata_bio->lp->d_ntracks; 410 blkno /= ata_bio->lp->d_ntracks; 411 cyl = blkno; 412 head |= WDSD_CHS; 413 } 414 if (xfer->c_flags & C_DMA) { 415 ata_bio->nblks = nblks; 416 ata_bio->nbytes = xfer->c_bcount; 417 cmd = (ata_bio->flags & ATA_READ) ? 418 WDCC_READDMA : WDCC_WRITEDMA; 419 /* Init the DMA channel. */ 420 if ((*wdc->dma_init)(wdc->dma_arg, 421 chp->ch_channel, xfer->c_drive, 422 (char *)xfer->c_databuf + xfer->c_skip, 423 ata_bio->nbytes, dma_flags) != 0) { 424 ata_bio->error = ERR_DMA; 425 ata_bio->r_error = 0; 426 wdc_ata_bio_done(chp, xfer); 427 return; 428 } 429 /* Initiate command */ 430 if (wdc->cap & WDC_CAPABILITY_SELECT) 431 wdc->select(chp, xfer->c_drive); 432 bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 433 0, WDSD_IBM | (xfer->c_drive << 4)); 434 switch(wdc_wait_for_ready(chp, ATA_DELAY, wait_flags)) { 435 case WDCWAIT_OK: 436 break; 437 case WDCWAIT_TOUT: 438 goto timeout; 439 case WDCWAIT_THR: 440 return; 441 } 442 if (ata_bio->flags & ATA_LBA48) { 443 wdccommandext(chp, xfer->c_drive, to48(cmd), 444 (u_int64_t)ata_bio->blkno, nblks); 445 } else { 446 wdccommand(chp, xfer->c_drive, cmd, cyl, 447 head, sect, nblks, 0); 448 } 449 /* start the DMA channel */ 450 (*wdc->dma_start)(wdc->dma_arg, 451 chp->ch_channel, xfer->c_drive); 452 chp->ch_flags |= WDCF_DMA_WAIT; 453 /* start timeout machinery */ 454 if ((xfer->c_flags & C_POLL) == 0) 455 callout_reset(&chp->ch_callout, 456 ATA_DELAY / 1000 * hz, wdctimeout, chp); 457 /* wait for irq */ 458 goto intr; 459 } /* else not DMA */ 460 ata_bio->nblks = min(nblks, ata_bio->multi); 461 ata_bio->nbytes = ata_bio->nblks * ata_bio->lp->d_secsize; 462 KASSERT(nblks == 1 || (ata_bio->flags & ATA_SINGLE) == 0); 463 if (ata_bio->nblks > 1) { 464 cmd = (ata_bio->flags & ATA_READ) ? 465 WDCC_READMULTI : WDCC_WRITEMULTI; 466 } else { 467 cmd = (ata_bio->flags & ATA_READ) ? 468 WDCC_READ : WDCC_WRITE; 469 } 470 /* Initiate command! */ 471 if (wdc->cap & WDC_CAPABILITY_SELECT) 472 wdc->select(chp, xfer->c_drive); 473 bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0, 474 WDSD_IBM | (xfer->c_drive << 4)); 475 switch(wdc_wait_for_ready(chp, ATA_DELAY, wait_flags)) { 476 case WDCWAIT_OK: 477 break; 478 case WDCWAIT_TOUT: 479 goto timeout; 480 case WDCWAIT_THR: 481 return; 482 } 483 if (ata_bio->flags & ATA_LBA48) { 484 wdccommandext(chp, xfer->c_drive, to48(cmd), 485 (u_int64_t) ata_bio->blkno, nblks); 486 } else { 487 wdccommand(chp, xfer->c_drive, cmd, cyl, 488 head, sect, nblks, 489 (ata_bio->lp->d_type == DTYPE_ST506) ? 490 ata_bio->lp->d_precompcyl / 4 : 0); 491 } 492 /* start timeout machinery */ 493 if ((xfer->c_flags & C_POLL) == 0) 494 callout_reset(&chp->ch_callout, 495 ATA_DELAY / 1000 * hz, wdctimeout, chp); 496 } else if (ata_bio->nblks > 1) { 497 /* The number of blocks in the last stretch may be smaller. */ 498 nblks = xfer->c_bcount / ata_bio->lp->d_secsize; 499 if (ata_bio->nblks > nblks) { 500 ata_bio->nblks = nblks; 501 ata_bio->nbytes = xfer->c_bcount; 502 } 503 } 504 /* If this was a write and not using DMA, push the data. */ 505 if ((ata_bio->flags & ATA_READ) == 0) { 506 /* 507 * we have to busy-wait here, we can't rely on running in 508 * thread context. 509 */ 510 if (wdc_wait_for_drq(chp, ATA_DELAY, AT_POLL) != 0) { 511 printf("%s:%d:%d: timeout waiting for DRQ, " 512 "st=0x%02x, err=0x%02x\n", 513 wdc->sc_dev.dv_xname, chp->ch_channel, 514 xfer->c_drive, chp->ch_status, chp->ch_error); 515 if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) 516 ata_bio->error = TIMEOUT; 517 wdc_ata_bio_done(chp, xfer); 518 return; 519 } 520 if (wdc_ata_err(drvp, ata_bio) == WDC_ATA_ERR) { 521 wdc_ata_bio_done(chp, xfer); 522 return; 523 } 524 if ((wdc->cap & WDC_CAPABILITY_ATA_NOSTREAM)) { 525 if (drvp->drive_flags & DRIVE_CAP32) { 526 bus_space_write_multi_4(chp->data32iot, 527 chp->data32ioh, 0, 528 (u_int32_t *)((char *)xfer->c_databuf + 529 xfer->c_skip), 530 ata_bio->nbytes >> 2); 531 } else { 532 bus_space_write_multi_2(chp->cmd_iot, 533 chp->cmd_iohs[wd_data], 0, 534 (u_int16_t *)((char *)xfer->c_databuf + 535 xfer->c_skip), 536 ata_bio->nbytes >> 1); 537 } 538 } else { 539 if (drvp->drive_flags & DRIVE_CAP32) { 540 bus_space_write_multi_stream_4(chp->data32iot, 541 chp->data32ioh, 0, 542 (u_int32_t *)((char *)xfer->c_databuf + 543 xfer->c_skip), 544 ata_bio->nbytes >> 2); 545 } else { 546 bus_space_write_multi_stream_2(chp->cmd_iot, 547 chp->cmd_iohs[wd_data], 0, 548 (u_int16_t *)((char *)xfer->c_databuf + 549 xfer->c_skip), 550 ata_bio->nbytes >> 1); 551 } 552 } 553 } 554 555 intr: /* Wait for IRQ (either real or polled) */ 556 if ((ata_bio->flags & ATA_POLL) == 0) { 557 chp->ch_flags |= WDCF_IRQ_WAIT; 558 } else { 559 /* Wait for at last 400ns for status bit to be valid */ 560 delay(1); 561 if (chp->ch_flags & WDCF_DMA_WAIT) { 562 wdc_dmawait(chp, xfer, ATA_DELAY); 563 chp->ch_flags &= ~WDCF_DMA_WAIT; 564 } 565 wdc_ata_bio_intr(chp, xfer, 0); 566 if ((ata_bio->flags & ATA_ITSDONE) == 0) 567 goto again; 568 } 569 return; 570 timeout: 571 printf("%s:%d:%d: not ready, st=0x%02x, err=0x%02x\n", 572 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 573 chp->ch_status, chp->ch_error); 574 if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) 575 ata_bio->error = TIMEOUT; 576 wdc_ata_bio_done(chp, xfer); 577 return; 578 } 579 580 static int 581 wdc_ata_bio_intr(struct wdc_channel *chp, struct ata_xfer *xfer, int irq) 582 { 583 struct wdc_softc *wdc = chp->ch_wdc; 584 struct ata_bio *ata_bio = xfer->c_cmd; 585 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 586 int drv_err; 587 588 WDCDEBUG_PRINT(("wdc_ata_bio_intr %s:%d:%d\n", 589 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive), 590 DEBUG_INTR | DEBUG_XFERS); 591 592 593 /* Is it not a transfer, but a control operation? */ 594 if (drvp->state < READY) { 595 printf("%s:%d:%d: bad state %d in wdc_ata_bio_intr\n", 596 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 597 drvp->state); 598 panic("wdc_ata_bio_intr: bad state"); 599 } 600 601 /* 602 * if we missed an interrupt in a PIO transfer, reset and restart. 603 * Don't try to continue transfer, we may have missed cycles. 604 */ 605 if ((xfer->c_flags & (C_TIMEOU | C_DMA)) == C_TIMEOU) { 606 ata_bio->error = TIMEOUT; 607 wdc_ata_bio_done(chp, xfer); 608 return 1; 609 } 610 611 /* Ack interrupt done by wdc_wait_for_unbusy */ 612 if (wdc_wait_for_unbusy(chp, (irq == 0) ? ATA_DELAY : 0, AT_POLL) < 0) { 613 if (irq && (xfer->c_flags & C_TIMEOU) == 0) 614 return 0; /* IRQ was not for us */ 615 printf("%s:%d:%d: device timeout, c_bcount=%d, c_skip%d\n", 616 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 617 xfer->c_bcount, xfer->c_skip); 618 ata_bio->error = TIMEOUT; 619 wdc_ata_bio_done(chp, xfer); 620 return 1; 621 } 622 if (wdc->cap & WDC_CAPABILITY_IRQACK) 623 wdc->irqack(chp); 624 625 drv_err = wdc_ata_err(drvp, ata_bio); 626 627 /* If we were using DMA, Turn off the DMA channel and check for error */ 628 if (xfer->c_flags & C_DMA) { 629 if (ata_bio->flags & ATA_POLL) { 630 /* 631 * IDE drives deassert WDCS_BSY before transfer is 632 * complete when using DMA. Polling for DRQ to deassert 633 * is not enough DRQ is not required to be 634 * asserted for DMA transfers, so poll for DRDY. 635 */ 636 if (wdcwait(chp, WDCS_DRDY | WDCS_DRQ, WDCS_DRDY, 637 ATA_DELAY, ATA_POLL) == WDCWAIT_TOUT) { 638 printf("%s:%d:%d: polled transfer timed out " 639 "(st=0x%x)\n", wdc->sc_dev.dv_xname, 640 chp->ch_channel, xfer->c_drive, 641 chp->ch_status); 642 ata_bio->error = TIMEOUT; 643 drv_err = WDC_ATA_ERR; 644 } 645 } 646 if (wdc->dma_status != 0) { 647 if (drv_err != WDC_ATA_ERR) { 648 ata_bio->error = ERR_DMA; 649 drv_err = WDC_ATA_ERR; 650 } 651 } 652 if (chp->ch_status & WDCS_DRQ) { 653 if (drv_err != WDC_ATA_ERR) { 654 printf("%s:%d:%d: intr with DRQ (st=0x%x)\n", 655 wdc->sc_dev.dv_xname, chp->ch_channel, 656 xfer->c_drive, chp->ch_status); 657 ata_bio->error = TIMEOUT; 658 drv_err = WDC_ATA_ERR; 659 } 660 } 661 if (ata_bio->r_error & WDCE_CRC) 662 ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); 663 if (drv_err != WDC_ATA_ERR) 664 goto end; 665 } 666 667 /* if we had an error, end */ 668 if (drv_err == WDC_ATA_ERR) { 669 wdc_ata_bio_done(chp, xfer); 670 return 1; 671 } 672 673 /* If this was a read and not using DMA, fetch the data. */ 674 if ((ata_bio->flags & ATA_READ) != 0) { 675 if ((chp->ch_status & WDCS_DRQ) != WDCS_DRQ) { 676 printf("%s:%d:%d: read intr before drq\n", 677 wdc->sc_dev.dv_xname, chp->ch_channel, 678 xfer->c_drive); 679 ata_bio->error = TIMEOUT; 680 wdc_ata_bio_done(chp, xfer); 681 return 1; 682 } 683 if ((wdc->cap & WDC_CAPABILITY_ATA_NOSTREAM)) { 684 if (drvp->drive_flags & DRIVE_CAP32) { 685 bus_space_read_multi_4(chp->data32iot, 686 chp->data32ioh, 0, 687 (u_int32_t *)((char *)xfer->c_databuf + 688 xfer->c_skip), 689 ata_bio->nbytes >> 2); 690 } else { 691 bus_space_read_multi_2(chp->cmd_iot, 692 chp->cmd_iohs[wd_data], 0, 693 (u_int16_t *)((char *)xfer->c_databuf + 694 xfer->c_skip), 695 ata_bio->nbytes >> 1); 696 } 697 } else { 698 if (drvp->drive_flags & DRIVE_CAP32) { 699 bus_space_read_multi_stream_4(chp->data32iot, 700 chp->data32ioh, 0, 701 (u_int32_t *)((char *)xfer->c_databuf + 702 xfer->c_skip), 703 ata_bio->nbytes >> 2); 704 } else { 705 bus_space_read_multi_stream_2(chp->cmd_iot, 706 chp->cmd_iohs[wd_data], 0, 707 (u_int16_t *)((char *)xfer->c_databuf + 708 xfer->c_skip), 709 ata_bio->nbytes >> 1); 710 } 711 } 712 } 713 714 end: 715 ata_bio->blkno += ata_bio->nblks; 716 ata_bio->blkdone += ata_bio->nblks; 717 xfer->c_skip += ata_bio->nbytes; 718 xfer->c_bcount -= ata_bio->nbytes; 719 /* See if this transfer is complete. */ 720 if (xfer->c_bcount > 0) { 721 if ((ata_bio->flags & ATA_POLL) == 0) { 722 /* Start the next operation */ 723 _wdc_ata_bio_start(chp, xfer); 724 } else { 725 /* Let _wdc_ata_bio_start do the loop */ 726 return 1; 727 } 728 } else { /* Done with this transfer */ 729 ata_bio->error = NOERROR; 730 wdc_ata_bio_done(chp, xfer); 731 } 732 return 1; 733 } 734 735 static void 736 wdc_ata_kill_pending(struct ata_drive_datas *drvp) 737 { 738 struct wdc_channel *chp = drvp->chnl_softc; 739 740 wdc_kill_pending(chp); 741 } 742 743 static void 744 wdc_ata_bio_kill_xfer(struct wdc_channel *chp, struct ata_xfer *xfer, 745 int reason) 746 { 747 struct ata_bio *ata_bio = xfer->c_cmd; 748 int drive = xfer->c_drive; 749 750 wdc_free_xfer(chp, xfer); 751 752 ata_bio->flags |= ATA_ITSDONE; 753 switch (reason) { 754 case KILL_GONE: 755 ata_bio->error = ERR_NODEV; 756 break; 757 case KILL_RESET: 758 ata_bio->error = ERR_RESET; 759 break; 760 default: 761 printf("wdc_ata_bio_kill_xfer: unknown reason %d\n", 762 reason); 763 panic("wdc_ata_bio_kill_xfer"); 764 } 765 ata_bio->r_error = WDCE_ABRT; 766 WDCDEBUG_PRINT(("wdc_ata_done: drv_done\n"), DEBUG_XFERS); 767 (*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc); 768 } 769 770 static void 771 wdc_ata_bio_done(struct wdc_channel *chp, struct ata_xfer *xfer) 772 { 773 struct wdc_softc *wdc = chp->ch_wdc; 774 struct ata_bio *ata_bio = xfer->c_cmd; 775 int drive = xfer->c_drive; 776 777 WDCDEBUG_PRINT(("wdc_ata_bio_done %s:%d:%d: flags 0x%x\n", 778 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 779 (u_int)xfer->c_flags), 780 DEBUG_XFERS); 781 782 callout_stop(&chp->ch_callout); 783 784 /* feed back residual bcount to our caller */ 785 ata_bio->bcount = xfer->c_bcount; 786 787 /* mark controller inactive and free xfer */ 788 chp->ch_queue->active_xfer = NULL; 789 wdc_free_xfer(chp, xfer); 790 791 ata_bio->flags |= ATA_ITSDONE; 792 WDCDEBUG_PRINT(("wdc_ata_done: drv_done\n"), DEBUG_XFERS); 793 (*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc); 794 WDCDEBUG_PRINT(("wdcstart from wdc_ata_done, flags 0x%x\n", 795 chp->ch_flags), DEBUG_XFERS); 796 wdcstart(chp); 797 } 798 799 static int 800 wdc_ata_err(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) 801 { 802 struct wdc_channel *chp = drvp->chnl_softc; 803 ata_bio->error = 0; 804 if (chp->ch_status & WDCS_BSY) { 805 ata_bio->error = TIMEOUT; 806 return WDC_ATA_ERR; 807 } 808 809 if (chp->ch_status & WDCS_DWF) { 810 ata_bio->error = ERR_DF; 811 return WDC_ATA_ERR; 812 } 813 814 if (chp->ch_status & WDCS_ERR) { 815 ata_bio->error = ERROR; 816 ata_bio->r_error = chp->ch_error; 817 if (ata_bio->r_error & (WDCE_BBK | WDCE_UNC | WDCE_IDNF | 818 WDCE_ABRT | WDCE_TK0NF | WDCE_AMNF)) 819 return WDC_ATA_ERR; 820 return WDC_ATA_NOERR; 821 } 822 823 if (chp->ch_status & WDCS_CORR) 824 ata_bio->flags |= ATA_CORR; 825 return WDC_ATA_NOERR; 826 } 827 828 static int 829 wdc_ata_addref(struct ata_drive_datas *drvp) 830 { 831 struct wdc_channel *chp = drvp->chnl_softc; 832 833 return (wdc_addref(chp)); 834 } 835 836 static void 837 wdc_ata_delref(struct ata_drive_datas *drvp) 838 { 839 struct wdc_channel *chp = drvp->chnl_softc; 840 841 wdc_delref(chp); 842 } 843
Indexes created Tue Sep 30 07:10:03 GMT 2025