ata_wdc.c revision 1.81
1 /* $NetBSD: ata_wdc.c,v 1.81 2005/06/07 13:45:11 peter 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 1.81 2005/06/07 13:45:11 peter 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/bufq.h> 82 #include <sys/malloc.h> 83 #include <sys/device.h> 84 #include <sys/disklabel.h> 85 #include <sys/syslog.h> 86 #include <sys/proc.h> 87 88 #include <machine/intr.h> 89 #include <machine/bus.h> 90 #ifndef __BUS_SPACE_HAS_STREAM_METHODS 91 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 92 #define bus_space_write_multi_stream_4 bus_space_write_multi_4 93 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 94 #define bus_space_read_multi_stream_4 bus_space_read_multi_4 95 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 96 97 #include <dev/ata/atareg.h> 98 #include <dev/ata/atavar.h> 99 #include <dev/ic/wdcreg.h> 100 #include <dev/ic/wdcvar.h> 101 102 #define DEBUG_INTR 0x01 103 #define DEBUG_XFERS 0x02 104 #define DEBUG_STATUS 0x04 105 #define DEBUG_FUNCS 0x08 106 #define DEBUG_PROBE 0x10 107 #ifdef ATADEBUG 108 extern int wdcdebug_wd_mask; /* inited in wd.c */ 109 #define ATADEBUG_PRINT(args, level) \ 110 if (wdcdebug_wd_mask & (level)) \ 111 printf args 112 #else 113 #define ATADEBUG_PRINT(args, level) 114 #endif 115 116 #define ATA_DELAY 10000 /* 10s for a drive I/O */ 117 118 static int wdc_ata_bio(struct ata_drive_datas*, struct ata_bio*); 119 static void wdc_ata_bio_start(struct ata_channel *,struct ata_xfer *); 120 static void _wdc_ata_bio_start(struct ata_channel *,struct ata_xfer *); 121 static int wdc_ata_bio_intr(struct ata_channel *, struct ata_xfer *, 122 int); 123 static void wdc_ata_bio_kill_xfer(struct ata_channel *, 124 struct ata_xfer *, int); 125 static void wdc_ata_bio_done(struct ata_channel *, struct ata_xfer *); 126 static int wdc_ata_err(struct ata_drive_datas *, struct ata_bio *); 127 #define WDC_ATA_NOERR 0x00 /* Drive doesn't report an error */ 128 #define WDC_ATA_RECOV 0x01 /* There was a recovered error */ 129 #define WDC_ATA_ERR 0x02 /* Drive reports an error */ 130 static int wdc_ata_addref(struct ata_drive_datas *); 131 static void wdc_ata_delref(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_reset_channel, 138 wdc_exec_command, 139 ata_get_params, 140 wdc_ata_addref, 141 wdc_ata_delref, 142 ata_kill_pending, 143 }; 144 145 /* 146 * Handle block I/O operation. Return ATACMD_COMPLETE, ATACMD_QUEUED, or 147 * ATACMD_TRY_AGAIN. Must be called at splbio(). 148 */ 149 static int 150 wdc_ata_bio(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) 151 { 152 struct ata_xfer *xfer; 153 struct ata_channel *chp = drvp->chnl_softc; 154 struct atac_softc *atac = chp->ch_atac; 155 156 xfer = ata_get_xfer(ATAXF_NOSLEEP); 157 if (xfer == NULL) 158 return ATACMD_TRY_AGAIN; 159 if (atac->atac_cap & ATAC_CAP_NOIRQ) 160 ata_bio->flags |= ATA_POLL; 161 if (ata_bio->flags & ATA_POLL) 162 xfer->c_flags |= C_POLL; 163 if ((drvp->drive_flags & (DRIVE_DMA | DRIVE_UDMA)) && 164 (ata_bio->flags & ATA_SINGLE) == 0) 165 xfer->c_flags |= C_DMA; 166 xfer->c_drive = drvp->drive; 167 xfer->c_cmd = ata_bio; 168 xfer->c_databuf = ata_bio->databuf; 169 xfer->c_bcount = ata_bio->bcount; 170 xfer->c_start = wdc_ata_bio_start; 171 xfer->c_intr = wdc_ata_bio_intr; 172 xfer->c_kill_xfer = wdc_ata_bio_kill_xfer; 173 ata_exec_xfer(chp, xfer); 174 return (ata_bio->flags & ATA_ITSDONE) ? ATACMD_COMPLETE : ATACMD_QUEUED; 175 } 176 177 static void 178 wdc_ata_bio_start(struct ata_channel *chp, struct ata_xfer *xfer) 179 { 180 struct atac_softc *atac = chp->ch_atac; 181 struct wdc_softc *wdc = CHAN_TO_WDC(chp); 182 struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; 183 struct ata_bio *ata_bio = xfer->c_cmd; 184 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 185 int wait_flags = (xfer->c_flags & C_POLL) ? AT_POLL : 0; 186 const char *errstring; 187 188 ATADEBUG_PRINT(("wdc_ata_bio_start %s:%d:%d\n", 189 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive), 190 DEBUG_XFERS); 191 192 /* Do control operations specially. */ 193 if (__predict_false(drvp->state < READY)) { 194 /* 195 * Actually, we want to be careful not to mess with the control 196 * state if the device is currently busy, but we can assume 197 * that we never get to this point if that's the case. 198 */ 199 /* If it's not a polled command, we need the kernel thread */ 200 if ((xfer->c_flags & C_POLL) == 0 && 201 (chp->ch_flags & ATACH_TH_RUN) == 0) { 202 chp->ch_queue->queue_freeze++; 203 wakeup(&chp->ch_thread); 204 return; 205 } 206 /* 207 * disable interrupts, all commands here should be quick 208 * enouth to be able to poll, and we don't go here that often 209 */ 210 bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, 211 WDCTL_4BIT | WDCTL_IDS); 212 if (wdc->select) 213 wdc->select(chp, xfer->c_drive); 214 bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, 215 WDSD_IBM | (xfer->c_drive << 4)); 216 DELAY(10); 217 errstring = "wait"; 218 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 219 goto ctrltimeout; 220 wdccommandshort(chp, xfer->c_drive, WDCC_RECAL); 221 /* Wait for at last 400ns for status bit to be valid */ 222 DELAY(1); 223 errstring = "recal"; 224 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 225 goto ctrltimeout; 226 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 227 goto ctrlerror; 228 /* Don't try to set modes if controller can't be adjusted */ 229 if (atac->atac_set_modes == NULL) 230 goto geometry; 231 /* Also don't try if the drive didn't report its mode */ 232 if ((drvp->drive_flags & DRIVE_MODE) == 0) 233 goto geometry; 234 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 235 0x08 | drvp->PIO_mode, WDSF_SET_MODE); 236 errstring = "piomode"; 237 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 238 goto ctrltimeout; 239 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 240 goto ctrlerror; 241 if (drvp->drive_flags & DRIVE_UDMA) { 242 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 243 0x40 | drvp->UDMA_mode, WDSF_SET_MODE); 244 } else if (drvp->drive_flags & DRIVE_DMA) { 245 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 246 0x20 | drvp->DMA_mode, WDSF_SET_MODE); 247 } else { 248 goto geometry; 249 } 250 errstring = "dmamode"; 251 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 252 goto ctrltimeout; 253 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 254 goto ctrlerror; 255 geometry: 256 if (ata_bio->flags & ATA_LBA) 257 goto multimode; 258 wdccommand(chp, xfer->c_drive, WDCC_IDP, 259 ata_bio->lp->d_ncylinders, 260 ata_bio->lp->d_ntracks - 1, 0, ata_bio->lp->d_nsectors, 261 (ata_bio->lp->d_type == DTYPE_ST506) ? 262 ata_bio->lp->d_precompcyl / 4 : 0); 263 errstring = "geometry"; 264 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 265 goto ctrltimeout; 266 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 267 goto ctrlerror; 268 multimode: 269 if (ata_bio->multi == 1) 270 goto ready; 271 wdccommand(chp, xfer->c_drive, WDCC_SETMULTI, 0, 0, 0, 272 ata_bio->multi, 0); 273 errstring = "setmulti"; 274 if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) 275 goto ctrltimeout; 276 if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) 277 goto ctrlerror; 278 ready: 279 drvp->state = READY; 280 /* 281 * The drive is usable now 282 */ 283 bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, 284 WDCTL_4BIT); 285 delay(10); /* some drives need a little delay here */ 286 } 287 288 _wdc_ata_bio_start(chp, xfer); 289 return; 290 ctrltimeout: 291 printf("%s:%d:%d: %s timed out\n", 292 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 293 errstring); 294 ata_bio->error = TIMEOUT; 295 goto ctrldone; 296 ctrlerror: 297 printf("%s:%d:%d: %s ", 298 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 299 errstring); 300 if (chp->ch_status & WDCS_DWF) { 301 printf("drive fault\n"); 302 ata_bio->error = ERR_DF; 303 } else { 304 printf("error (%x)\n", chp->ch_error); 305 ata_bio->r_error = chp->ch_error; 306 ata_bio->error = ERROR; 307 } 308 ctrldone: 309 drvp->state = 0; 310 wdc_ata_bio_done(chp, xfer); 311 bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); 312 return; 313 } 314 315 static void 316 _wdc_ata_bio_start(struct ata_channel *chp, struct ata_xfer *xfer) 317 { 318 struct atac_softc *atac = chp->ch_atac; 319 struct wdc_softc *wdc = CHAN_TO_WDC(chp); 320 struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; 321 struct ata_bio *ata_bio = xfer->c_cmd; 322 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 323 int wait_flags = (xfer->c_flags & C_POLL) ? AT_POLL : 0; 324 u_int16_t cyl; 325 u_int8_t head, sect, cmd = 0; 326 int nblks; 327 int dma_flags = 0; 328 329 ATADEBUG_PRINT(("_wdc_ata_bio_start %s:%d:%d\n", 330 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive), 331 DEBUG_INTR | DEBUG_XFERS); 332 333 if (xfer->c_flags & C_DMA) { 334 if (drvp->n_xfers <= NXFER) 335 drvp->n_xfers++; 336 dma_flags = (ata_bio->flags & ATA_READ) ? WDC_DMA_READ : 0; 337 if (ata_bio->flags & ATA_LBA48) 338 dma_flags |= WDC_DMA_LBA48; 339 } 340 again: 341 /* 342 * 343 * When starting a multi-sector transfer, or doing single-sector 344 * transfers... 345 */ 346 if (xfer->c_skip == 0 || (ata_bio->flags & ATA_SINGLE) != 0) { 347 if (ata_bio->flags & ATA_SINGLE) 348 nblks = 1; 349 else 350 nblks = xfer->c_bcount / ata_bio->lp->d_secsize; 351 /* Check for bad sectors and adjust transfer, if necessary. */ 352 if ((ata_bio->lp->d_flags & D_BADSECT) != 0) { 353 long blkdiff; 354 int i; 355 for (i = 0; (blkdiff = ata_bio->badsect[i]) != -1; 356 i++) { 357 blkdiff -= ata_bio->blkno; 358 if (blkdiff < 0) 359 continue; 360 if (blkdiff == 0) { 361 /* Replace current block of transfer. */ 362 ata_bio->blkno = 363 ata_bio->lp->d_secperunit - 364 ata_bio->lp->d_nsectors - i - 1; 365 } 366 if (blkdiff < nblks) { 367 /* Bad block inside transfer. */ 368 ata_bio->flags |= ATA_SINGLE; 369 nblks = 1; 370 } 371 break; 372 } 373 /* Transfer is okay now. */ 374 } 375 if (ata_bio->flags & ATA_LBA48) { 376 sect = 0; 377 cyl = 0; 378 head = 0; 379 } else if (ata_bio->flags & ATA_LBA) { 380 sect = (ata_bio->blkno >> 0) & 0xff; 381 cyl = (ata_bio->blkno >> 8) & 0xffff; 382 head = (ata_bio->blkno >> 24) & 0x0f; 383 head |= WDSD_LBA; 384 } else { 385 int blkno = ata_bio->blkno; 386 sect = blkno % ata_bio->lp->d_nsectors; 387 sect++; /* Sectors begin with 1, not 0. */ 388 blkno /= ata_bio->lp->d_nsectors; 389 head = blkno % ata_bio->lp->d_ntracks; 390 blkno /= ata_bio->lp->d_ntracks; 391 cyl = blkno; 392 head |= WDSD_CHS; 393 } 394 if (xfer->c_flags & C_DMA) { 395 ata_bio->nblks = nblks; 396 ata_bio->nbytes = xfer->c_bcount; 397 cmd = (ata_bio->flags & ATA_READ) ? 398 WDCC_READDMA : WDCC_WRITEDMA; 399 /* Init the DMA channel. */ 400 if ((*wdc->dma_init)(wdc->dma_arg, 401 chp->ch_channel, xfer->c_drive, 402 (char *)xfer->c_databuf + xfer->c_skip, 403 ata_bio->nbytes, dma_flags) != 0) { 404 ata_bio->error = ERR_DMA; 405 ata_bio->r_error = 0; 406 wdc_ata_bio_done(chp, xfer); 407 return; 408 } 409 /* Initiate command */ 410 if (wdc->select) 411 wdc->select(chp, xfer->c_drive); 412 bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 413 0, WDSD_IBM | (xfer->c_drive << 4)); 414 switch(wdc_wait_for_ready(chp, ATA_DELAY, wait_flags)) { 415 case WDCWAIT_OK: 416 break; 417 case WDCWAIT_TOUT: 418 goto timeout; 419 case WDCWAIT_THR: 420 return; 421 } 422 if (ata_bio->flags & ATA_LBA48) { 423 wdccommandext(chp, xfer->c_drive, atacmd_to48(cmd), 424 (u_int64_t)ata_bio->blkno, nblks); 425 } else { 426 wdccommand(chp, xfer->c_drive, cmd, cyl, 427 head, sect, nblks, 0); 428 } 429 /* start the DMA channel */ 430 (*wdc->dma_start)(wdc->dma_arg, 431 chp->ch_channel, xfer->c_drive); 432 chp->ch_flags |= ATACH_DMA_WAIT; 433 /* start timeout machinery */ 434 if ((xfer->c_flags & C_POLL) == 0) 435 callout_reset(&chp->ch_callout, 436 ATA_DELAY / 1000 * hz, wdctimeout, chp); 437 /* wait for irq */ 438 goto intr; 439 } /* else not DMA */ 440 ata_bio->nblks = min(nblks, ata_bio->multi); 441 ata_bio->nbytes = ata_bio->nblks * ata_bio->lp->d_secsize; 442 KASSERT(nblks == 1 || (ata_bio->flags & ATA_SINGLE) == 0); 443 if (ata_bio->nblks > 1) { 444 cmd = (ata_bio->flags & ATA_READ) ? 445 WDCC_READMULTI : WDCC_WRITEMULTI; 446 } else { 447 cmd = (ata_bio->flags & ATA_READ) ? 448 WDCC_READ : WDCC_WRITE; 449 } 450 /* Initiate command! */ 451 if (wdc->select) 452 wdc->select(chp, xfer->c_drive); 453 bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, 454 WDSD_IBM | (xfer->c_drive << 4)); 455 switch(wdc_wait_for_ready(chp, ATA_DELAY, wait_flags)) { 456 case WDCWAIT_OK: 457 break; 458 case WDCWAIT_TOUT: 459 goto timeout; 460 case WDCWAIT_THR: 461 return; 462 } 463 if (ata_bio->flags & ATA_LBA48) { 464 wdccommandext(chp, xfer->c_drive, atacmd_to48(cmd), 465 (u_int64_t) ata_bio->blkno, nblks); 466 } else { 467 wdccommand(chp, xfer->c_drive, cmd, cyl, 468 head, sect, nblks, 469 (ata_bio->lp->d_type == DTYPE_ST506) ? 470 ata_bio->lp->d_precompcyl / 4 : 0); 471 } 472 /* start timeout machinery */ 473 if ((xfer->c_flags & C_POLL) == 0) 474 callout_reset(&chp->ch_callout, 475 ATA_DELAY / 1000 * hz, wdctimeout, chp); 476 } else if (ata_bio->nblks > 1) { 477 /* The number of blocks in the last stretch may be smaller. */ 478 nblks = xfer->c_bcount / ata_bio->lp->d_secsize; 479 if (ata_bio->nblks > nblks) { 480 ata_bio->nblks = nblks; 481 ata_bio->nbytes = xfer->c_bcount; 482 } 483 } 484 /* If this was a write and not using DMA, push the data. */ 485 if ((ata_bio->flags & ATA_READ) == 0) { 486 /* 487 * we have to busy-wait here, we can't rely on running in 488 * thread context. 489 */ 490 if (wdc_wait_for_drq(chp, ATA_DELAY, AT_POLL) != 0) { 491 printf("%s:%d:%d: timeout waiting for DRQ, " 492 "st=0x%02x, err=0x%02x\n", 493 atac->atac_dev.dv_xname, chp->ch_channel, 494 xfer->c_drive, chp->ch_status, chp->ch_error); 495 if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) 496 ata_bio->error = TIMEOUT; 497 wdc_ata_bio_done(chp, xfer); 498 return; 499 } 500 if (wdc_ata_err(drvp, ata_bio) == WDC_ATA_ERR) { 501 wdc_ata_bio_done(chp, xfer); 502 return; 503 } 504 wdc->dataout_pio(chp, drvp->drive_flags, 505 (char *)xfer->c_databuf + xfer->c_skip, ata_bio->nbytes); 506 } 507 508 intr: /* Wait for IRQ (either real or polled) */ 509 if ((ata_bio->flags & ATA_POLL) == 0) { 510 chp->ch_flags |= ATACH_IRQ_WAIT; 511 } else { 512 /* Wait for at last 400ns for status bit to be valid */ 513 delay(1); 514 if (chp->ch_flags & ATACH_DMA_WAIT) { 515 wdc_dmawait(chp, xfer, ATA_DELAY); 516 chp->ch_flags &= ~ATACH_DMA_WAIT; 517 } 518 wdc_ata_bio_intr(chp, xfer, 0); 519 if ((ata_bio->flags & ATA_ITSDONE) == 0) 520 goto again; 521 } 522 return; 523 timeout: 524 printf("%s:%d:%d: not ready, st=0x%02x, err=0x%02x\n", 525 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 526 chp->ch_status, chp->ch_error); 527 if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) 528 ata_bio->error = TIMEOUT; 529 wdc_ata_bio_done(chp, xfer); 530 return; 531 } 532 533 static int 534 wdc_ata_bio_intr(struct ata_channel *chp, struct ata_xfer *xfer, int irq) 535 { 536 struct atac_softc *atac = chp->ch_atac; 537 struct wdc_softc *wdc = CHAN_TO_WDC(chp); 538 struct ata_bio *ata_bio = xfer->c_cmd; 539 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 540 int drv_err; 541 542 ATADEBUG_PRINT(("wdc_ata_bio_intr %s:%d:%d\n", 543 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive), 544 DEBUG_INTR | DEBUG_XFERS); 545 546 547 /* Is it not a transfer, but a control operation? */ 548 if (drvp->state < READY) { 549 printf("%s:%d:%d: bad state %d in wdc_ata_bio_intr\n", 550 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 551 drvp->state); 552 panic("wdc_ata_bio_intr: bad state"); 553 } 554 555 /* 556 * if we missed an interrupt in a PIO transfer, reset and restart. 557 * Don't try to continue transfer, we may have missed cycles. 558 */ 559 if ((xfer->c_flags & (C_TIMEOU | C_DMA)) == C_TIMEOU) { 560 ata_bio->error = TIMEOUT; 561 wdc_ata_bio_done(chp, xfer); 562 return 1; 563 } 564 565 /* Ack interrupt done by wdc_wait_for_unbusy */ 566 if (wdc_wait_for_unbusy(chp, (irq == 0) ? ATA_DELAY : 0, AT_POLL) < 0) { 567 if (irq && (xfer->c_flags & C_TIMEOU) == 0) 568 return 0; /* IRQ was not for us */ 569 printf("%s:%d:%d: device timeout, c_bcount=%d, c_skip%d\n", 570 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 571 xfer->c_bcount, xfer->c_skip); 572 ata_bio->error = TIMEOUT; 573 wdc_ata_bio_done(chp, xfer); 574 return 1; 575 } 576 if (wdc->irqack) 577 wdc->irqack(chp); 578 579 drv_err = wdc_ata_err(drvp, ata_bio); 580 581 /* If we were using DMA, Turn off the DMA channel and check for error */ 582 if (xfer->c_flags & C_DMA) { 583 if (ata_bio->flags & ATA_POLL) { 584 /* 585 * IDE drives deassert WDCS_BSY before transfer is 586 * complete when using DMA. Polling for DRQ to deassert 587 * is not enough DRQ is not required to be 588 * asserted for DMA transfers, so poll for DRDY. 589 */ 590 if (wdcwait(chp, WDCS_DRDY | WDCS_DRQ, WDCS_DRDY, 591 ATA_DELAY, ATA_POLL) == WDCWAIT_TOUT) { 592 printf("%s:%d:%d: polled transfer timed out " 593 "(st=0x%x)\n", atac->atac_dev.dv_xname, 594 chp->ch_channel, xfer->c_drive, 595 chp->ch_status); 596 ata_bio->error = TIMEOUT; 597 drv_err = WDC_ATA_ERR; 598 } 599 } 600 if (wdc->dma_status != 0) { 601 if (drv_err != WDC_ATA_ERR) { 602 ata_bio->error = ERR_DMA; 603 drv_err = WDC_ATA_ERR; 604 } 605 } 606 if (chp->ch_status & WDCS_DRQ) { 607 if (drv_err != WDC_ATA_ERR) { 608 printf("%s:%d:%d: intr with DRQ (st=0x%x)\n", 609 atac->atac_dev.dv_xname, chp->ch_channel, 610 xfer->c_drive, chp->ch_status); 611 ata_bio->error = TIMEOUT; 612 drv_err = WDC_ATA_ERR; 613 } 614 } 615 if (drv_err != WDC_ATA_ERR) 616 goto end; 617 if (ata_bio->r_error & WDCE_CRC || ata_bio->error == ERR_DMA) 618 ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); 619 } 620 621 /* if we had an error, end */ 622 if (drv_err == WDC_ATA_ERR) { 623 wdc_ata_bio_done(chp, xfer); 624 return 1; 625 } 626 627 /* If this was a read and not using DMA, fetch the data. */ 628 if ((ata_bio->flags & ATA_READ) != 0) { 629 if ((chp->ch_status & WDCS_DRQ) != WDCS_DRQ) { 630 printf("%s:%d:%d: read intr before drq\n", 631 atac->atac_dev.dv_xname, chp->ch_channel, 632 xfer->c_drive); 633 ata_bio->error = TIMEOUT; 634 wdc_ata_bio_done(chp, xfer); 635 return 1; 636 } 637 wdc->datain_pio(chp, drvp->drive_flags, 638 (char *)xfer->c_databuf + xfer->c_skip, ata_bio->nbytes); 639 } 640 641 end: 642 ata_bio->blkno += ata_bio->nblks; 643 ata_bio->blkdone += ata_bio->nblks; 644 xfer->c_skip += ata_bio->nbytes; 645 xfer->c_bcount -= ata_bio->nbytes; 646 /* See if this transfer is complete. */ 647 if (xfer->c_bcount > 0) { 648 if ((ata_bio->flags & ATA_POLL) == 0) { 649 /* Start the next operation */ 650 _wdc_ata_bio_start(chp, xfer); 651 } else { 652 /* Let _wdc_ata_bio_start do the loop */ 653 return 1; 654 } 655 } else { /* Done with this transfer */ 656 ata_bio->error = NOERROR; 657 wdc_ata_bio_done(chp, xfer); 658 } 659 return 1; 660 } 661 662 static void 663 wdc_ata_bio_kill_xfer(struct ata_channel *chp, struct ata_xfer *xfer, 664 int reason) 665 { 666 struct ata_bio *ata_bio = xfer->c_cmd; 667 int drive = xfer->c_drive; 668 669 ata_free_xfer(chp, xfer); 670 671 ata_bio->flags |= ATA_ITSDONE; 672 switch (reason) { 673 case KILL_GONE: 674 ata_bio->error = ERR_NODEV; 675 break; 676 case KILL_RESET: 677 ata_bio->error = ERR_RESET; 678 break; 679 default: 680 printf("wdc_ata_bio_kill_xfer: unknown reason %d\n", 681 reason); 682 panic("wdc_ata_bio_kill_xfer"); 683 } 684 ata_bio->r_error = WDCE_ABRT; 685 ATADEBUG_PRINT(("wdc_ata_done: drv_done\n"), DEBUG_XFERS); 686 (*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc); 687 } 688 689 static void 690 wdc_ata_bio_done(struct ata_channel *chp, struct ata_xfer *xfer) 691 { 692 struct atac_softc *atac = chp->ch_atac; 693 struct ata_bio *ata_bio = xfer->c_cmd; 694 int drive = xfer->c_drive; 695 696 ATADEBUG_PRINT(("wdc_ata_bio_done %s:%d:%d: flags 0x%x\n", 697 atac->atac_dev.dv_xname, chp->ch_channel, xfer->c_drive, 698 (u_int)xfer->c_flags), 699 DEBUG_XFERS); 700 701 callout_stop(&chp->ch_callout); 702 703 /* feed back residual bcount to our caller */ 704 ata_bio->bcount = xfer->c_bcount; 705 706 /* mark controller inactive and free xfer */ 707 chp->ch_queue->active_xfer = NULL; 708 ata_free_xfer(chp, xfer); 709 710 if (chp->ch_drive[drive].drive_flags & DRIVE_WAITDRAIN) { 711 ata_bio->error = ERR_NODEV; 712 chp->ch_drive[drive].drive_flags &= ~DRIVE_WAITDRAIN; 713 wakeup(&chp->ch_queue->active_xfer); 714 } 715 ata_bio->flags |= ATA_ITSDONE; 716 ATADEBUG_PRINT(("wdc_ata_done: drv_done\n"), DEBUG_XFERS); 717 (*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc); 718 ATADEBUG_PRINT(("atastart from wdc_ata_done, flags 0x%x\n", 719 chp->ch_flags), DEBUG_XFERS); 720 atastart(chp); 721 } 722 723 static int 724 wdc_ata_err(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) 725 { 726 struct ata_channel *chp = drvp->chnl_softc; 727 ata_bio->error = 0; 728 if (chp->ch_status & WDCS_BSY) { 729 ata_bio->error = TIMEOUT; 730 return WDC_ATA_ERR; 731 } 732 733 if (chp->ch_status & WDCS_DWF) { 734 ata_bio->error = ERR_DF; 735 return WDC_ATA_ERR; 736 } 737 738 if (chp->ch_status & WDCS_ERR) { 739 ata_bio->error = ERROR; 740 ata_bio->r_error = chp->ch_error; 741 if (ata_bio->r_error & (WDCE_BBK | WDCE_UNC | WDCE_IDNF | 742 WDCE_ABRT | WDCE_TK0NF | WDCE_AMNF)) 743 return WDC_ATA_ERR; 744 return WDC_ATA_NOERR; 745 } 746 747 if (chp->ch_status & WDCS_CORR) 748 ata_bio->flags |= ATA_CORR; 749 return WDC_ATA_NOERR; 750 } 751 752 static int 753 wdc_ata_addref(struct ata_drive_datas *drvp) 754 { 755 struct ata_channel *chp = drvp->chnl_softc; 756 757 return (ata_addref(chp)); 758 } 759 760 static void 761 wdc_ata_delref(struct ata_drive_datas *drvp) 762 { 763 struct ata_channel *chp = drvp->chnl_softc; 764 765 ata_delref(chp); 766 } 767
Indexes created Tue Sep 30 20:09:53 GMT 2025