atapi_wdc.c revision 1.75
1 /* $NetBSD: atapi_wdc.c,v 1.75 2004/08/11 17:49:27 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2001 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 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: atapi_wdc.c,v 1.75 2004/08/11 17:49:27 mycroft Exp $"); 34 35 #ifndef WDCDEBUG 36 #define WDCDEBUG 37 #endif /* WDCDEBUG */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/file.h> 43 #include <sys/stat.h> 44 #include <sys/buf.h> 45 #include <sys/malloc.h> 46 #include <sys/device.h> 47 #include <sys/syslog.h> 48 #include <sys/proc.h> 49 #include <sys/dvdio.h> 50 51 #include <machine/intr.h> 52 #include <machine/bus.h> 53 54 #ifndef __BUS_SPACE_HAS_STREAM_METHODS 55 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 56 #define bus_space_write_multi_stream_4 bus_space_write_multi_4 57 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 58 #define bus_space_read_multi_stream_4 bus_space_read_multi_4 59 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 60 61 #include <dev/ata/atareg.h> 62 #include <dev/ata/atavar.h> 63 #include <dev/ic/wdcreg.h> 64 #include <dev/ic/wdcvar.h> 65 66 #include <dev/scsipi/scsi_all.h> /* for SCSI status */ 67 68 #define DEBUG_INTR 0x01 69 #define DEBUG_XFERS 0x02 70 #define DEBUG_STATUS 0x04 71 #define DEBUG_FUNCS 0x08 72 #define DEBUG_PROBE 0x10 73 #ifdef WDCDEBUG 74 int wdcdebug_atapi_mask = 0; 75 #define WDCDEBUG_PRINT(args, level) \ 76 if (wdcdebug_atapi_mask & (level)) \ 77 printf args 78 #else 79 #define WDCDEBUG_PRINT(args, level) 80 #endif 81 82 #define ATAPI_DELAY 10 /* 10 ms, this is used only before sending a cmd */ 83 #define ATAPI_MODE_DELAY 1000 /* 1s, timeout for SET_FEATYRE cmds */ 84 85 static int wdc_atapi_get_params(struct scsipi_channel *, int, 86 struct ataparams *); 87 static void wdc_atapi_probe_device(struct atapibus_softc *, int); 88 static void wdc_atapi_minphys (struct buf *bp); 89 static void wdc_atapi_start(struct wdc_channel *,struct ata_xfer *); 90 static int wdc_atapi_intr(struct wdc_channel *, struct ata_xfer *, int); 91 static void wdc_atapi_kill_xfer(struct wdc_channel *, 92 struct ata_xfer *, int); 93 static void wdc_atapi_phase_complete(struct ata_xfer *); 94 static void wdc_atapi_done(struct wdc_channel *, struct ata_xfer *); 95 static void wdc_atapi_reset(struct wdc_channel *, struct ata_xfer *); 96 static void wdc_atapi_scsipi_request(struct scsipi_channel *, 97 scsipi_adapter_req_t, void *); 98 static void wdc_atapi_kill_pending(struct scsipi_periph *); 99 static void wdc_atapi_polldsc(void *arg); 100 101 #define MAX_SIZE MAXPHYS 102 103 static const struct scsipi_bustype wdc_atapi_bustype = { 104 SCSIPI_BUSTYPE_ATAPI, 105 atapi_scsipi_cmd, 106 atapi_interpret_sense, 107 atapi_print_addr, 108 wdc_atapi_kill_pending, 109 }; 110 111 void 112 wdc_atapibus_attach(struct atabus_softc *ata_sc) 113 { 114 struct wdc_channel *chp = ata_sc->sc_chan; 115 struct wdc_softc *wdc = chp->ch_wdc; 116 struct scsipi_adapter *adapt = &wdc->sc_atapi_adapter._generic; 117 struct scsipi_channel *chan = &chp->ch_atapi_channel; 118 119 /* 120 * Fill in the scsipi_adapter. 121 */ 122 adapt->adapt_dev = &wdc->sc_dev; 123 adapt->adapt_nchannels = wdc->nchannels; 124 adapt->adapt_request = wdc_atapi_scsipi_request; 125 adapt->adapt_minphys = wdc_atapi_minphys; 126 if (wdc->cap & WDC_CAPABILITY_NOIRQ) 127 adapt->adapt_flags |= SCSIPI_ADAPT_POLL_ONLY; 128 wdc->sc_atapi_adapter.atapi_probe_device = wdc_atapi_probe_device; 129 130 /* 131 * Fill in the scsipi_channel. 132 */ 133 memset(chan, 0, sizeof(*chan)); 134 chan->chan_adapter = adapt; 135 chan->chan_bustype = &wdc_atapi_bustype; 136 chan->chan_channel = chp->ch_channel; 137 chan->chan_flags = SCSIPI_CHAN_OPENINGS; 138 chan->chan_openings = 1; 139 chan->chan_max_periph = 1; 140 chan->chan_ntargets = 2; 141 chan->chan_nluns = 1; 142 143 chp->atapibus = config_found(&ata_sc->sc_dev, chan, atapiprint); 144 } 145 146 static void 147 wdc_atapi_minphys(struct buf *bp) 148 { 149 150 if (bp->b_bcount > MAX_SIZE) 151 bp->b_bcount = MAX_SIZE; 152 minphys(bp); 153 } 154 155 /* 156 * Kill off all pending xfers for a periph. 157 * 158 * Must be called at splbio(). 159 */ 160 static void 161 wdc_atapi_kill_pending(struct scsipi_periph *periph) 162 { 163 struct wdc_softc *wdc = 164 (void *)periph->periph_channel->chan_adapter->adapt_dev; 165 struct wdc_channel *chp = 166 wdc->channels[periph->periph_channel->chan_channel]; 167 168 wdc_kill_pending(&chp->ch_drive[periph->periph_target]); 169 } 170 171 static void 172 wdc_atapi_kill_xfer(struct wdc_channel *chp, struct ata_xfer *xfer, int reason) 173 { 174 struct scsipi_xfer *sc_xfer = xfer->c_cmd; 175 176 /* remove this command from xfer queue */ 177 switch (reason) { 178 case KILL_GONE: 179 sc_xfer->error = XS_DRIVER_STUFFUP; 180 break; 181 case KILL_RESET: 182 sc_xfer->error = XS_RESET; 183 break; 184 default: 185 printf("wdc_ata_bio_kill_xfer: unknown reason %d\n", 186 reason); 187 panic("wdc_ata_bio_kill_xfer"); 188 } 189 wdc_free_xfer(chp, xfer); 190 scsipi_done(sc_xfer); 191 } 192 193 static int 194 wdc_atapi_get_params(struct scsipi_channel *chan, int drive, 195 struct ataparams *id) 196 { 197 struct wdc_softc *wdc = (void *)chan->chan_adapter->adapt_dev; 198 struct wdc_channel *chp = wdc->channels[chan->chan_channel]; 199 struct wdc_command wdc_c; 200 201 /* if no ATAPI device detected at wdc attach time, skip */ 202 if ((chp->ch_drive[drive].drive_flags & DRIVE_ATAPI) == 0) { 203 WDCDEBUG_PRINT(("wdc_atapi_get_params: drive %d not present\n", 204 drive), DEBUG_PROBE); 205 return -1; 206 } 207 208 memset(&wdc_c, 0, sizeof(struct wdc_command)); 209 wdc_c.r_command = ATAPI_SOFT_RESET; 210 wdc_c.r_st_bmask = 0; 211 wdc_c.r_st_pmask = 0; 212 wdc_c.flags = AT_WAIT | AT_POLL; 213 wdc_c.timeout = WDC_RESET_WAIT; 214 if (wdc_exec_command(&chp->ch_drive[drive], &wdc_c) != WDC_COMPLETE) { 215 printf("wdc_atapi_get_params: ATAPI_SOFT_RESET failed for" 216 " drive %s:%d:%d: driver failed\n", 217 wdc->sc_dev.dv_xname, chp->ch_channel, drive); 218 panic("wdc_atapi_get_params"); 219 } 220 if (wdc_c.flags & (AT_ERROR | AT_TIMEOU | AT_DF)) { 221 WDCDEBUG_PRINT(("wdc_atapi_get_params: ATAPI_SOFT_RESET " 222 "failed for drive %s:%d:%d: error 0x%x\n", 223 wdc->sc_dev.dv_xname, chp->ch_channel, drive, 224 wdc_c.r_error), DEBUG_PROBE); 225 return -1; 226 } 227 chp->ch_drive[drive].state = 0; 228 229 bus_space_read_1(chp->cmd_iot, chp->cmd_iohs[wd_status], 0); 230 231 /* Some ATAPI devices need a bit more time after software reset. */ 232 delay(5000); 233 if (ata_get_params(&chp->ch_drive[drive], AT_WAIT, id) != 0) { 234 WDCDEBUG_PRINT(("wdc_atapi_get_params: ATAPI_IDENTIFY_DEVICE " 235 "failed for drive %s:%d:%d: error 0x%x\n", 236 wdc->sc_dev.dv_xname, chp->ch_channel, drive, 237 wdc_c.r_error), DEBUG_PROBE); 238 return -1; 239 } 240 return 0; 241 } 242 243 static void 244 wdc_atapi_probe_device(struct atapibus_softc *sc, int target) 245 { 246 struct scsipi_channel *chan = sc->sc_channel; 247 struct scsipi_periph *periph; 248 struct ataparams ids; 249 struct ataparams *id = &ids; 250 struct wdc_softc *wdc = (void *)chan->chan_adapter->adapt_dev; 251 struct wdc_channel *chp = wdc->channels[chan->chan_channel]; 252 struct ata_drive_datas *drvp = &chp->ch_drive[target]; 253 struct scsipibus_attach_args sa; 254 char serial_number[21], model[41], firmware_revision[9]; 255 256 /* skip if already attached */ 257 if (scsipi_lookup_periph(chan, target, 0) != NULL) 258 return; 259 260 if (wdc_atapi_get_params(chan, target, id) == 0) { 261 #ifdef ATAPI_DEBUG_PROBE 262 printf("%s drive %d: cmdsz 0x%x drqtype 0x%x\n", 263 sc->sc_dev.dv_xname, target, 264 id->atap_config & ATAPI_CFG_CMD_MASK, 265 id->atap_config & ATAPI_CFG_DRQ_MASK); 266 #endif 267 periph = scsipi_alloc_periph(M_NOWAIT); 268 if (periph == NULL) { 269 printf("%s: unable to allocate periph for drive %d\n", 270 sc->sc_dev.dv_xname, target); 271 return; 272 } 273 periph->periph_dev = NULL; 274 periph->periph_channel = chan; 275 periph->periph_switch = &atapi_probe_periphsw; 276 periph->periph_target = target; 277 periph->periph_lun = 0; 278 periph->periph_quirks = PQUIRK_ONLYBIG; 279 280 #ifdef SCSIPI_DEBUG 281 if (SCSIPI_DEBUG_TYPE == SCSIPI_BUSTYPE_ATAPI && 282 SCSIPI_DEBUG_TARGET == target) 283 periph->periph_dbflags |= SCSIPI_DEBUG_FLAGS; 284 #endif 285 periph->periph_type = ATAPI_CFG_TYPE(id->atap_config); 286 if (id->atap_config & ATAPI_CFG_REMOV) 287 periph->periph_flags |= PERIPH_REMOVABLE; 288 if (periph->periph_type == T_SEQUENTIAL) 289 drvp->drive_flags |= DRIVE_ATAPIST; 290 291 sa.sa_periph = periph; 292 sa.sa_inqbuf.type = ATAPI_CFG_TYPE(id->atap_config); 293 sa.sa_inqbuf.removable = id->atap_config & ATAPI_CFG_REMOV ? 294 T_REMOV : T_FIXED; 295 scsipi_strvis(model, 40, id->atap_model, 40); 296 scsipi_strvis(serial_number, 20, id->atap_serial, 20); 297 scsipi_strvis(firmware_revision, 8, id->atap_revision, 8); 298 sa.sa_inqbuf.vendor = model; 299 sa.sa_inqbuf.product = serial_number; 300 sa.sa_inqbuf.revision = firmware_revision; 301 302 /* 303 * Determine the operating mode capabilities of the device. 304 */ 305 if ((id->atap_config & ATAPI_CFG_CMD_MASK) == ATAPI_CFG_CMD_16) 306 periph->periph_cap |= PERIPH_CAP_CMD16; 307 /* XXX This is gross. */ 308 periph->periph_cap |= (id->atap_config & ATAPI_CFG_DRQ_MASK); 309 310 drvp->drv_softc = atapi_probe_device(sc, target, periph, &sa); 311 312 if (drvp->drv_softc) 313 wdc_probe_caps(drvp); 314 else 315 drvp->drive_flags &= ~DRIVE_ATAPI; 316 } else { 317 drvp->drive_flags &= ~DRIVE_ATAPI; 318 } 319 } 320 321 static void 322 wdc_atapi_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req, 323 void *arg) 324 { 325 struct scsipi_adapter *adapt = chan->chan_adapter; 326 struct scsipi_periph *periph; 327 struct scsipi_xfer *sc_xfer; 328 struct wdc_softc *wdc = (void *)adapt->adapt_dev; 329 struct ata_xfer *xfer; 330 int channel = chan->chan_channel; 331 int drive, s; 332 333 switch (req) { 334 case ADAPTER_REQ_RUN_XFER: 335 sc_xfer = arg; 336 periph = sc_xfer->xs_periph; 337 drive = periph->periph_target; 338 339 WDCDEBUG_PRINT(("wdc_atapi_scsipi_request %s:%d:%d\n", 340 wdc->sc_dev.dv_xname, channel, drive), DEBUG_XFERS); 341 if ((wdc->sc_dev.dv_flags & DVF_ACTIVE) == 0) { 342 sc_xfer->error = XS_DRIVER_STUFFUP; 343 scsipi_done(sc_xfer); 344 return; 345 } 346 347 xfer = wdc_get_xfer(WDC_NOSLEEP); 348 if (xfer == NULL) { 349 sc_xfer->error = XS_RESOURCE_SHORTAGE; 350 scsipi_done(sc_xfer); 351 return; 352 } 353 354 if (sc_xfer->xs_control & XS_CTL_POLL) 355 xfer->c_flags |= C_POLL; 356 if ((wdc->channels[channel]->ch_drive[drive].drive_flags & 357 (DRIVE_DMA | DRIVE_UDMA)) && sc_xfer->datalen > 0) 358 xfer->c_flags |= C_DMA; 359 xfer->c_drive = drive; 360 xfer->c_flags |= C_ATAPI; 361 if (sc_xfer->cmd->opcode == GPCMD_REPORT_KEY || 362 sc_xfer->cmd->opcode == GPCMD_SEND_KEY || 363 sc_xfer->cmd->opcode == GPCMD_READ_DVD_STRUCTURE) { 364 /* 365 * DVD authentication commands must always be done in 366 * PIO mode. 367 */ 368 xfer->c_flags &= ~C_DMA; 369 } 370 /* 371 * DMA can't deal with transfers which are not a multiple of 372 * 2 bytes. It's a bug to request such transfers for ATAPI 373 * but as the request can come from userland, we have to 374 * protect against it. 375 * Also some devices seems to not handle DMA xfers of less than 376 * 4 bytes. 377 */ 378 if (sc_xfer->datalen < 4 || (sc_xfer->datalen & 0x01)) 379 xfer->c_flags &= ~C_DMA; 380 381 xfer->c_cmd = sc_xfer; 382 xfer->c_databuf = sc_xfer->data; 383 xfer->c_bcount = sc_xfer->datalen; 384 xfer->c_start = wdc_atapi_start; 385 xfer->c_intr = wdc_atapi_intr; 386 xfer->c_kill_xfer = wdc_atapi_kill_xfer; 387 xfer->c_dscpoll = 0; 388 s = splbio(); 389 wdc_exec_xfer(wdc->channels[channel], xfer); 390 #ifdef DIAGNOSTIC 391 if ((sc_xfer->xs_control & XS_CTL_POLL) != 0 && 392 (sc_xfer->xs_status & XS_STS_DONE) == 0) 393 panic("wdc_atapi_scsipi_request: polled command " 394 "not done"); 395 #endif 396 splx(s); 397 return; 398 399 default: 400 /* Not supported, nothing to do. */ 401 ; 402 } 403 } 404 405 static void 406 wdc_atapi_start(struct wdc_channel *chp, struct ata_xfer *xfer) 407 { 408 struct wdc_softc *wdc = chp->ch_wdc; 409 struct scsipi_xfer *sc_xfer = xfer->c_cmd; 410 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 411 int wait_flags = (sc_xfer->xs_control & XS_CTL_POLL) ? AT_POLL : 0; 412 char *errstring; 413 414 WDCDEBUG_PRINT(("wdc_atapi_start %s:%d:%d, scsi flags 0x%x \n", 415 wdc->sc_dev.dv_xname, chp->ch_channel, drvp->drive, 416 sc_xfer->xs_control), DEBUG_XFERS); 417 if ((xfer->c_flags & C_DMA) && (drvp->n_xfers <= NXFER)) 418 drvp->n_xfers++; 419 /* Do control operations specially. */ 420 if (__predict_false(drvp->state < READY)) { 421 /* If it's not a polled command, we need the kenrel thread */ 422 if ((sc_xfer->xs_control & XS_CTL_POLL) == 0 && 423 (chp->ch_flags & WDCF_TH_RUN) == 0) { 424 chp->ch_queue->queue_freeze++; 425 wakeup(&chp->ch_thread); 426 return; 427 } 428 /* 429 * disable interrupts, all commands here should be quick 430 * enouth to be able to poll, and we don't go here that often 431 */ 432 bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, 433 WDCTL_4BIT | WDCTL_IDS); 434 if (wdc->cap & WDC_CAPABILITY_SELECT) 435 wdc->select(chp, xfer->c_drive); 436 bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0, 437 WDSD_IBM | (xfer->c_drive << 4)); 438 /* Don't try to set mode if controller can't be adjusted */ 439 if ((wdc->cap & WDC_CAPABILITY_MODE) == 0) 440 goto ready; 441 /* Also don't try if the drive didn't report its mode */ 442 if ((drvp->drive_flags & DRIVE_MODE) == 0) 443 goto ready; 444 errstring = "unbusy"; 445 if (wdc_wait_for_unbusy(chp, ATAPI_DELAY, wait_flags)) 446 goto timeout; 447 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 448 0x08 | drvp->PIO_mode, WDSF_SET_MODE); 449 errstring = "piomode"; 450 if (wdc_wait_for_unbusy(chp, ATAPI_MODE_DELAY, wait_flags)) 451 goto timeout; 452 if (chp->ch_status & WDCS_ERR) { 453 if (chp->ch_error == WDCE_ABRT) { 454 /* 455 * some ATAPI drives rejects pio settings. 456 * all we can do here is fall back to PIO 0 457 */ 458 drvp->drive_flags &= ~DRIVE_MODE; 459 drvp->drive_flags &= ~(DRIVE_DMA|DRIVE_UDMA); 460 drvp->PIO_mode = 0; 461 drvp->DMA_mode = 0; 462 printf("%s:%d:%d: pio setting rejected, " 463 "falling back to PIO mode 0\n", 464 wdc->sc_dev.dv_xname, 465 chp->ch_channel, xfer->c_drive); 466 wdc->set_modes(chp); 467 goto ready; 468 } 469 goto error; 470 } 471 if (drvp->drive_flags & DRIVE_UDMA) { 472 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 473 0x40 | drvp->UDMA_mode, WDSF_SET_MODE); 474 } else if (drvp->drive_flags & DRIVE_DMA) { 475 wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, 476 0x20 | drvp->DMA_mode, WDSF_SET_MODE); 477 } else { 478 goto ready; 479 } 480 errstring = "dmamode"; 481 if (wdc_wait_for_unbusy(chp, ATAPI_MODE_DELAY, wait_flags)) 482 goto timeout; 483 if (chp->ch_status & WDCS_ERR) 484 goto error; 485 ready: 486 drvp->state = READY; 487 bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, 488 WDCTL_4BIT); 489 delay(10); /* some drives need a little delay here */ 490 } 491 /* start timeout machinery */ 492 if ((sc_xfer->xs_control & XS_CTL_POLL) == 0) 493 callout_reset(&chp->ch_callout, mstohz(sc_xfer->timeout), 494 wdctimeout, chp); 495 496 if (wdc->cap & WDC_CAPABILITY_SELECT) 497 wdc->select(chp, xfer->c_drive); 498 bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0, 499 WDSD_IBM | (xfer->c_drive << 4)); 500 switch (wdc_wait_for_unbusy(chp, ATAPI_DELAY, wait_flags) < 0) { 501 case WDCWAIT_OK: 502 break; 503 case WDCWAIT_TOUT: 504 printf("wdc_atapi_start: not ready, st = %02x\n", 505 chp->ch_status); 506 sc_xfer->error = XS_TIMEOUT; 507 wdc_atapi_reset(chp, xfer); 508 return; 509 case WDCWAIT_THR: 510 return; 511 } 512 513 /* 514 * Even with WDCS_ERR, the device should accept a command packet 515 * Limit length to what can be stuffed into the cylinder register 516 * (16 bits). Some CD-ROMs seem to interpret '0' as 65536, 517 * but not all devices do that and it's not obvious from the 518 * ATAPI spec that that behaviour should be expected. If more 519 * data is necessary, multiple data transfer phases will be done. 520 */ 521 522 wdccommand(chp, xfer->c_drive, ATAPI_PKT_CMD, 523 xfer->c_bcount <= 0xffff ? xfer->c_bcount : 0xffff, 524 0, 0, 0, 525 (xfer->c_flags & C_DMA) ? ATAPI_PKT_CMD_FTRE_DMA : 0); 526 527 /* 528 * If there is no interrupt for CMD input, busy-wait for it (done in 529 * the interrupt routine. If it is a polled command, call the interrupt 530 * routine until command is done. 531 */ 532 if ((sc_xfer->xs_periph->periph_cap & ATAPI_CFG_DRQ_MASK) != 533 ATAPI_CFG_IRQ_DRQ || (sc_xfer->xs_control & XS_CTL_POLL)) { 534 /* Wait for at last 400ns for status bit to be valid */ 535 DELAY(1); 536 wdc_atapi_intr(chp, xfer, 0); 537 } else { 538 chp->ch_flags |= WDCF_IRQ_WAIT; 539 } 540 if (sc_xfer->xs_control & XS_CTL_POLL) { 541 if (chp->ch_flags & WDCF_DMA_WAIT) { 542 wdc_dmawait(chp, xfer, sc_xfer->timeout); 543 chp->ch_flags &= ~WDCF_DMA_WAIT; 544 } 545 while ((sc_xfer->xs_status & XS_STS_DONE) == 0) { 546 /* Wait for at last 400ns for status bit to be valid */ 547 DELAY(1); 548 wdc_atapi_intr(chp, xfer, 0); 549 } 550 } 551 return; 552 timeout: 553 printf("%s:%d:%d: %s timed out\n", 554 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 555 errstring); 556 sc_xfer->error = XS_TIMEOUT; 557 bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); 558 delay(10); /* some drives need a little delay here */ 559 wdc_atapi_reset(chp, xfer); 560 return; 561 error: 562 printf("%s:%d:%d: %s ", 563 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 564 errstring); 565 printf("error (0x%x)\n", chp->ch_error); 566 sc_xfer->error = XS_SHORTSENSE; 567 sc_xfer->sense.atapi_sense = chp->ch_error; 568 bus_space_write_1(chp->ctl_iot, chp->ctl_ioh, wd_aux_ctlr, WDCTL_4BIT); 569 delay(10); /* some drives need a little delay here */ 570 wdc_atapi_reset(chp, xfer); 571 return; 572 } 573 574 static int 575 wdc_atapi_intr(struct wdc_channel *chp, struct ata_xfer *xfer, int irq) 576 { 577 struct wdc_softc *wdc = chp->ch_wdc; 578 struct scsipi_xfer *sc_xfer = xfer->c_cmd; 579 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 580 int len, phase, i, retries=0; 581 int ire; 582 int dma_flags = 0; 583 void *cmd; 584 585 WDCDEBUG_PRINT(("wdc_atapi_intr %s:%d:%d\n", 586 wdc->sc_dev.dv_xname, chp->ch_channel, drvp->drive), 587 DEBUG_INTR); 588 589 /* Is it not a transfer, but a control operation? */ 590 if (drvp->state < READY) { 591 printf("%s:%d:%d: bad state %d in wdc_atapi_intr\n", 592 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 593 drvp->state); 594 panic("wdc_atapi_intr: bad state"); 595 } 596 /* 597 * If we missed an interrupt in a PIO transfer, reset and restart. 598 * Don't try to continue transfer, we may have missed cycles. 599 */ 600 if ((xfer->c_flags & (C_TIMEOU | C_DMA)) == C_TIMEOU) { 601 sc_xfer->error = XS_TIMEOUT; 602 wdc_atapi_reset(chp, xfer); 603 return 1; 604 } 605 606 /* Ack interrupt done in wdc_wait_for_unbusy */ 607 if (wdc->cap & WDC_CAPABILITY_SELECT) 608 wdc->select(chp, xfer->c_drive); 609 bus_space_write_1(chp->cmd_iot, chp->cmd_iohs[wd_sdh], 0, 610 WDSD_IBM | (xfer->c_drive << 4)); 611 if (wdc_wait_for_unbusy(chp, 612 (irq == 0) ? sc_xfer->timeout : 0, AT_POLL) == WDCWAIT_TOUT) { 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 if (xfer->c_flags & C_DMA) { 619 ata_dmaerr(drvp, 620 (xfer->c_flags & C_POLL) ? AT_POLL : 0); 621 } 622 sc_xfer->error = XS_TIMEOUT; 623 wdc_atapi_reset(chp, xfer); 624 return 1; 625 } 626 if (wdc->cap & WDC_CAPABILITY_IRQACK) 627 wdc->irqack(chp); 628 629 /* 630 * If we missed an IRQ and were using DMA, flag it as a DMA error 631 * and reset device. 632 */ 633 if ((xfer->c_flags & C_TIMEOU) && (xfer->c_flags & C_DMA)) { 634 ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); 635 sc_xfer->error = XS_RESET; 636 wdc_atapi_reset(chp, xfer); 637 return (1); 638 } 639 /* 640 * if the request sense command was aborted, report the short sense 641 * previously recorded, else continue normal processing 642 */ 643 644 if (xfer->c_flags & C_DMA) 645 dma_flags = (sc_xfer->xs_control & XS_CTL_DATA_IN) 646 ? WDC_DMA_READ : 0; 647 again: 648 len = bus_space_read_1(chp->cmd_iot, chp->cmd_iohs[wd_cyl_lo], 0) + 649 256 * bus_space_read_1(chp->cmd_iot, chp->cmd_iohs[wd_cyl_hi], 0); 650 ire = bus_space_read_1(chp->cmd_iot, chp->cmd_iohs[wd_ireason], 0); 651 phase = (ire & (WDCI_CMD | WDCI_IN)) | (chp->ch_status & WDCS_DRQ); 652 WDCDEBUG_PRINT(("wdc_atapi_intr: c_bcount %d len %d st 0x%x err 0x%x " 653 "ire 0x%x :", xfer->c_bcount, 654 len, chp->ch_status, chp->ch_error, ire), DEBUG_INTR); 655 656 switch (phase) { 657 case PHASE_CMDOUT: 658 cmd = sc_xfer->cmd; 659 WDCDEBUG_PRINT(("PHASE_CMDOUT\n"), DEBUG_INTR); 660 /* Init the DMA channel if necessary */ 661 if (xfer->c_flags & C_DMA) { 662 if ((*wdc->dma_init)(wdc->dma_arg, 663 chp->ch_channel, xfer->c_drive, 664 xfer->c_databuf, xfer->c_bcount, dma_flags) != 0) { 665 sc_xfer->error = XS_DRIVER_STUFFUP; 666 break; 667 } 668 } 669 670 /* send packet command */ 671 /* Commands are 12 or 16 bytes long. It's 32-bit aligned */ 672 wdc_dataout_pio(chp, drvp->drive_flags, cmd, sc_xfer->cmdlen); 673 674 /* Start the DMA channel if necessary */ 675 if (xfer->c_flags & C_DMA) { 676 (*wdc->dma_start)(wdc->dma_arg, 677 chp->ch_channel, xfer->c_drive); 678 chp->ch_flags |= WDCF_DMA_WAIT; 679 } 680 681 if ((sc_xfer->xs_control & XS_CTL_POLL) == 0) { 682 chp->ch_flags |= WDCF_IRQ_WAIT; 683 } 684 return 1; 685 686 case PHASE_DATAOUT: 687 /* write data */ 688 WDCDEBUG_PRINT(("PHASE_DATAOUT\n"), DEBUG_INTR); 689 if ((sc_xfer->xs_control & XS_CTL_DATA_OUT) == 0 || 690 (xfer->c_flags & C_DMA) != 0) { 691 printf("wdc_atapi_intr: bad data phase DATAOUT\n"); 692 if (xfer->c_flags & C_DMA) { 693 ata_dmaerr(drvp, 694 (xfer->c_flags & C_POLL) ? AT_POLL : 0); 695 } 696 sc_xfer->error = XS_TIMEOUT; 697 wdc_atapi_reset(chp, xfer); 698 return 1; 699 } 700 if (xfer->c_bcount < len) { 701 printf("wdc_atapi_intr: warning: write only " 702 "%d of %d requested bytes\n", xfer->c_bcount, len); 703 wdc_dataout_pio(chp, drvp->drive_flags, 704 (char *)xfer->c_databuf + xfer->c_skip, 705 xfer->c_bcount); 706 for (i = xfer->c_bcount; i < len; i += 2) 707 bus_space_write_2(chp->cmd_iot, 708 chp->cmd_iohs[wd_data], 0, 0); 709 xfer->c_skip += xfer->c_bcount; 710 xfer->c_bcount = 0; 711 } else { 712 wdc_dataout_pio(chp, drvp->drive_flags, 713 (char *)xfer->c_databuf + xfer->c_skip, len); 714 xfer->c_skip += len; 715 xfer->c_bcount -= len; 716 } 717 if ((sc_xfer->xs_control & XS_CTL_POLL) == 0) { 718 chp->ch_flags |= WDCF_IRQ_WAIT; 719 } 720 return 1; 721 722 case PHASE_DATAIN: 723 /* Read data */ 724 WDCDEBUG_PRINT(("PHASE_DATAIN\n"), DEBUG_INTR); 725 if ((sc_xfer->xs_control & XS_CTL_DATA_IN) == 0 || 726 (xfer->c_flags & C_DMA) != 0) { 727 printf("wdc_atapi_intr: bad data phase DATAIN\n"); 728 if (xfer->c_flags & C_DMA) { 729 ata_dmaerr(drvp, 730 (xfer->c_flags & C_POLL) ? AT_POLL : 0); 731 } 732 sc_xfer->error = XS_TIMEOUT; 733 wdc_atapi_reset(chp, xfer); 734 return 1; 735 } 736 if (xfer->c_bcount < len) { 737 printf("wdc_atapi_intr: warning: reading only " 738 "%d of %d bytes\n", xfer->c_bcount, len); 739 wdc_datain_pio(chp, drvp->drive_flags, 740 (char *)xfer->c_databuf + xfer->c_skip, 741 xfer->c_bcount); 742 wdcbit_bucket(chp, len - xfer->c_bcount); 743 xfer->c_skip += xfer->c_bcount; 744 xfer->c_bcount = 0; 745 } else { 746 wdc_datain_pio(chp, drvp->drive_flags, 747 (char *)xfer->c_databuf + xfer->c_skip, len); 748 xfer->c_skip += len; 749 xfer->c_bcount -=len; 750 } 751 if ((sc_xfer->xs_control & XS_CTL_POLL) == 0) { 752 chp->ch_flags |= WDCF_IRQ_WAIT; 753 } 754 return 1; 755 756 case PHASE_ABORTED: 757 case PHASE_COMPLETED: 758 WDCDEBUG_PRINT(("PHASE_COMPLETED\n"), DEBUG_INTR); 759 if (xfer->c_flags & C_DMA) { 760 xfer->c_bcount -= sc_xfer->datalen; 761 } 762 sc_xfer->resid = xfer->c_bcount; 763 wdc_atapi_phase_complete(xfer); 764 return(1); 765 766 default: 767 if (++retries<500) { 768 DELAY(100); 769 chp->ch_status = bus_space_read_1(chp->cmd_iot, 770 chp->cmd_iohs[wd_status], 0); 771 chp->ch_error = bus_space_read_1(chp->cmd_iot, 772 chp->cmd_iohs[wd_error], 0); 773 goto again; 774 } 775 printf("wdc_atapi_intr: unknown phase 0x%x\n", phase); 776 if (chp->ch_status & WDCS_ERR) { 777 sc_xfer->error = XS_SHORTSENSE; 778 sc_xfer->sense.atapi_sense = chp->ch_error; 779 } else { 780 if (xfer->c_flags & C_DMA) { 781 ata_dmaerr(drvp, 782 (xfer->c_flags & C_POLL) ? AT_POLL : 0); 783 } 784 sc_xfer->error = XS_RESET; 785 wdc_atapi_reset(chp, xfer); 786 return (1); 787 } 788 } 789 WDCDEBUG_PRINT(("wdc_atapi_intr: wdc_atapi_done() (end), error 0x%x " 790 "sense 0x%x\n", sc_xfer->error, sc_xfer->sense.atapi_sense), 791 DEBUG_INTR); 792 wdc_atapi_done(chp, xfer); 793 return (1); 794 } 795 796 static void 797 wdc_atapi_phase_complete(struct ata_xfer *xfer) 798 { 799 struct wdc_channel *chp = xfer->c_chp; 800 struct wdc_softc *wdc = chp->ch_wdc; 801 struct scsipi_xfer *sc_xfer = xfer->c_cmd; 802 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 803 804 /* wait for DSC if needed */ 805 if (drvp->drive_flags & DRIVE_ATAPIST) { 806 WDCDEBUG_PRINT(("wdc_atapi_phase_complete(%s:%d:%d) " 807 "polldsc %d\n", wdc->sc_dev.dv_xname, chp->ch_channel, 808 xfer->c_drive, xfer->c_dscpoll), DEBUG_XFERS); 809 #if 1 810 if (cold) 811 panic("wdc_atapi_phase_complete: cold"); 812 #endif 813 if (wdcwait(chp, WDCS_DSC, WDCS_DSC, 10, 814 AT_POLL) == WDCWAIT_TOUT) { 815 /* 10ms not enough, try again in 1 tick */ 816 if (xfer->c_dscpoll++ > 817 mstohz(sc_xfer->timeout)) { 818 printf("%s:%d:%d: wait_for_dsc " 819 "failed\n", 820 wdc->sc_dev.dv_xname, 821 chp->ch_channel, xfer->c_drive); 822 sc_xfer->error = XS_TIMEOUT; 823 wdc_atapi_reset(chp, xfer); 824 return; 825 } else 826 callout_reset(&chp->ch_callout, 1, 827 wdc_atapi_polldsc, xfer); 828 return; 829 } 830 } 831 832 /* 833 * Some drive occasionally set WDCS_ERR with 834 * "ATA illegal length indication" in the error 835 * register. If we read some data the sense is valid 836 * anyway, so don't report the error. 837 */ 838 if (chp->ch_status & WDCS_ERR && 839 ((sc_xfer->xs_control & XS_CTL_REQSENSE) == 0 || 840 sc_xfer->resid == sc_xfer->datalen)) { 841 /* save the short sense */ 842 sc_xfer->error = XS_SHORTSENSE; 843 sc_xfer->sense.atapi_sense = chp->ch_error; 844 if ((sc_xfer->xs_periph->periph_quirks & 845 PQUIRK_NOSENSE) == 0) { 846 /* ask scsipi to send a REQUEST_SENSE */ 847 sc_xfer->error = XS_BUSY; 848 sc_xfer->status = SCSI_CHECK; 849 } else if (wdc->dma_status & 850 (WDC_DMAST_NOIRQ | WDC_DMAST_ERR)) { 851 ata_dmaerr(drvp, 852 (xfer->c_flags & C_POLL) ? AT_POLL : 0); 853 sc_xfer->error = XS_RESET; 854 wdc_atapi_reset(chp, xfer); 855 return; 856 } 857 } 858 if (xfer->c_bcount != 0) { 859 WDCDEBUG_PRINT(("wdc_atapi_intr: bcount value is " 860 "%d after io\n", xfer->c_bcount), DEBUG_XFERS); 861 } 862 #ifdef DIAGNOSTIC 863 if (xfer->c_bcount < 0) { 864 printf("wdc_atapi_intr warning: bcount value " 865 "is %d after io\n", xfer->c_bcount); 866 } 867 #endif 868 WDCDEBUG_PRINT(("wdc_atapi_phase_complete: wdc_atapi_done(), " 869 "error 0x%x sense 0x%x\n", sc_xfer->error, 870 sc_xfer->sense.atapi_sense), DEBUG_INTR); 871 wdc_atapi_done(chp, xfer); 872 } 873 874 static void 875 wdc_atapi_done(struct wdc_channel *chp, struct ata_xfer *xfer) 876 { 877 struct wdc_softc *wdc = chp->ch_wdc; 878 struct scsipi_xfer *sc_xfer = xfer->c_cmd; 879 int drive = xfer->c_drive; 880 881 WDCDEBUG_PRINT(("wdc_atapi_done %s:%d:%d: flags 0x%x\n", 882 wdc->sc_dev.dv_xname, chp->ch_channel, xfer->c_drive, 883 (u_int)xfer->c_flags), DEBUG_XFERS); 884 callout_stop(&chp->ch_callout); 885 /* mark controller inactive and free the command */ 886 chp->ch_queue->active_xfer = NULL; 887 wdc_free_xfer(chp, xfer); 888 889 if (chp->ch_drive[drive].drive_flags & DRIVE_WAITDRAIN) { 890 sc_xfer->error = XS_DRIVER_STUFFUP; 891 chp->ch_drive[drive].drive_flags &= ~DRIVE_WAITDRAIN; 892 wakeup(&chp->ch_queue->active_xfer); 893 } 894 895 WDCDEBUG_PRINT(("wdc_atapi_done: scsipi_done\n"), DEBUG_XFERS); 896 scsipi_done(sc_xfer); 897 WDCDEBUG_PRINT(("wdcstart from wdc_atapi_done, flags 0x%x\n", 898 chp->ch_flags), DEBUG_XFERS); 899 wdcstart(chp); 900 } 901 902 static void 903 wdc_atapi_reset(struct wdc_channel *chp, struct ata_xfer *xfer) 904 { 905 struct wdc_softc *wdc = chp->ch_wdc; 906 struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; 907 struct scsipi_xfer *sc_xfer = xfer->c_cmd; 908 909 wdccommandshort(chp, xfer->c_drive, ATAPI_SOFT_RESET); 910 drvp->state = 0; 911 if (wdc_wait_for_unbusy(chp, WDC_RESET_WAIT, AT_POLL) != 0) { 912 printf("%s:%d:%d: reset failed\n", 913 wdc->sc_dev.dv_xname, chp->ch_channel, 914 xfer->c_drive); 915 sc_xfer->error = XS_SELTIMEOUT; 916 } 917 wdc_atapi_done(chp, xfer); 918 return; 919 } 920 921 static void 922 wdc_atapi_polldsc(void *arg) 923 { 924 925 wdc_atapi_phase_complete(arg); 926 } 927
Indexes created Mon Sep 22 13:09:51 GMT 2025