| 1 | /* $NetBSD: ata_wdc.c,v 1.105 2015/01/02 19:42:06 christos 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 | * |
| 15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | */ |
| 26 | |
| 27 | /*- |
| 28 | * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc. |
| 29 | * All rights reserved. |
| 30 | * |
| 31 | * This code is derived from software contributed to The NetBSD Foundation |
| 32 | * by Charles M. Hannum, by Onno van der Linden and by Manuel Bouyer. |
| 33 | * |
| 34 | * Redistribution and use in source and binary forms, with or without |
| 35 | * modification, are permitted provided that the following conditions |
| 36 | * are met: |
| 37 | * 1. Redistributions of source code must retain the above copyright |
| 38 | * notice, this list of conditions and the following disclaimer. |
| 39 | * 2. Redistributions in binary form must reproduce the above copyright |
| 40 | * notice, this list of conditions and the following disclaimer in the |
| 41 | * documentation and/or other materials provided with the distribution. |
| 42 | * |
| 43 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 44 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 45 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 46 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 47 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 48 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 49 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 50 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 51 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 52 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 53 | * POSSIBILITY OF SUCH DAMAGE. |
| 54 | */ |
| 55 | |
| 56 | #include <sys/cdefs.h> |
| 57 | __KERNEL_RCSID(0, "$NetBSD: ata_wdc.c,v 1.105 2015/01/02 19:42:06 christos Exp $" ); |
| 58 | |
| 59 | #include "opt_ata.h" |
| 60 | #include "opt_wdc.h" |
| 61 | |
| 62 | #include <sys/param.h> |
| 63 | #include <sys/systm.h> |
| 64 | #include <sys/kernel.h> |
| 65 | #include <sys/file.h> |
| 66 | #include <sys/stat.h> |
| 67 | #include <sys/buf.h> |
| 68 | #include <sys/bufq.h> |
| 69 | #include <sys/malloc.h> |
| 70 | #include <sys/device.h> |
| 71 | #include <sys/disklabel.h> |
| 72 | #include <sys/syslog.h> |
| 73 | #include <sys/proc.h> |
| 74 | |
| 75 | #include <sys/intr.h> |
| 76 | #include <sys/bus.h> |
| 77 | #ifndef __BUS_SPACE_HAS_STREAM_METHODS |
| 78 | #define bus_space_write_multi_stream_2 bus_space_write_multi_2 |
| 79 | #define bus_space_write_multi_stream_4 bus_space_write_multi_4 |
| 80 | #define bus_space_read_multi_stream_2 bus_space_read_multi_2 |
| 81 | #define bus_space_read_multi_stream_4 bus_space_read_multi_4 |
| 82 | #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ |
| 83 | |
| 84 | #include <dev/ata/ataconf.h> |
| 85 | #include <dev/ata/atareg.h> |
| 86 | #include <dev/ata/atavar.h> |
| 87 | #include <dev/ic/wdcreg.h> |
| 88 | #include <dev/ic/wdcvar.h> |
| 89 | |
| 90 | #define DEBUG_INTR 0x01 |
| 91 | #define DEBUG_XFERS 0x02 |
| 92 | #define DEBUG_STATUS 0x04 |
| 93 | #define DEBUG_FUNCS 0x08 |
| 94 | #define DEBUG_PROBE 0x10 |
| 95 | #ifdef ATADEBUG |
| 96 | extern int wdcdebug_wd_mask; /* inited in wd.c */ |
| 97 | #define ATADEBUG_PRINT(args, level) \ |
| 98 | if (wdcdebug_wd_mask & (level)) \ |
| 99 | printf args |
| 100 | #else |
| 101 | #define ATADEBUG_PRINT(args, level) |
| 102 | #endif |
| 103 | |
| 104 | #define ATA_DELAY 10000 /* 10s for a drive I/O */ |
| 105 | |
| 106 | static int wdc_ata_bio(struct ata_drive_datas*, struct ata_bio*); |
| 107 | static void wdc_ata_bio_start(struct ata_channel *,struct ata_xfer *); |
| 108 | static void _wdc_ata_bio_start(struct ata_channel *,struct ata_xfer *); |
| 109 | static int wdc_ata_bio_intr(struct ata_channel *, struct ata_xfer *, |
| 110 | int); |
| 111 | static void wdc_ata_bio_kill_xfer(struct ata_channel *, |
| 112 | struct ata_xfer *, int); |
| 113 | static void wdc_ata_bio_done(struct ata_channel *, struct ata_xfer *); |
| 114 | static int wdc_ata_err(struct ata_drive_datas *, struct ata_bio *); |
| 115 | #define WDC_ATA_NOERR 0x00 /* Drive doesn't report an error */ |
| 116 | #define WDC_ATA_RECOV 0x01 /* There was a recovered error */ |
| 117 | #define WDC_ATA_ERR 0x02 /* Drive reports an error */ |
| 118 | static int wdc_ata_addref(struct ata_drive_datas *); |
| 119 | static void wdc_ata_delref(struct ata_drive_datas *); |
| 120 | |
| 121 | const struct ata_bustype wdc_ata_bustype = { |
| 122 | SCSIPI_BUSTYPE_ATA, |
| 123 | wdc_ata_bio, |
| 124 | wdc_reset_drive, |
| 125 | wdc_reset_channel, |
| 126 | wdc_exec_command, |
| 127 | ata_get_params, |
| 128 | wdc_ata_addref, |
| 129 | wdc_ata_delref, |
| 130 | ata_kill_pending, |
| 131 | }; |
| 132 | |
| 133 | /* |
| 134 | * Handle block I/O operation. Return ATACMD_COMPLETE, ATACMD_QUEUED, or |
| 135 | * ATACMD_TRY_AGAIN. Must be called at splbio(). |
| 136 | */ |
| 137 | static int |
| 138 | wdc_ata_bio(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) |
| 139 | { |
| 140 | struct ata_xfer *xfer; |
| 141 | struct ata_channel *chp = drvp->chnl_softc; |
| 142 | struct atac_softc *atac = chp->ch_atac; |
| 143 | |
| 144 | xfer = ata_get_xfer(ATAXF_NOSLEEP); |
| 145 | if (xfer == NULL) |
| 146 | return ATACMD_TRY_AGAIN; |
| 147 | if (atac->atac_cap & ATAC_CAP_NOIRQ) |
| 148 | ata_bio->flags |= ATA_POLL; |
| 149 | if (ata_bio->flags & ATA_POLL) |
| 150 | xfer->c_flags |= C_POLL; |
| 151 | #if NATA_DMA |
| 152 | if ((drvp->drive_flags & (ATA_DRIVE_DMA | ATA_DRIVE_UDMA)) && |
| 153 | (ata_bio->flags & ATA_SINGLE) == 0) |
| 154 | xfer->c_flags |= C_DMA; |
| 155 | #endif |
| 156 | #if NATA_DMA && NATA_PIOBM |
| 157 | else |
| 158 | #endif |
| 159 | #if NATA_PIOBM |
| 160 | if (atac->atac_cap & ATAC_CAP_PIOBM) |
| 161 | xfer->c_flags |= C_PIOBM; |
| 162 | #endif |
| 163 | xfer->c_drive = drvp->drive; |
| 164 | xfer->c_cmd = ata_bio; |
| 165 | xfer->c_databuf = ata_bio->databuf; |
| 166 | xfer->c_bcount = ata_bio->bcount; |
| 167 | xfer->c_start = wdc_ata_bio_start; |
| 168 | xfer->c_intr = wdc_ata_bio_intr; |
| 169 | xfer->c_kill_xfer = wdc_ata_bio_kill_xfer; |
| 170 | ata_exec_xfer(chp, xfer); |
| 171 | return (ata_bio->flags & ATA_ITSDONE) ? ATACMD_COMPLETE : ATACMD_QUEUED; |
| 172 | } |
| 173 | |
| 174 | static void |
| 175 | wdc_ata_bio_start(struct ata_channel *chp, struct ata_xfer *xfer) |
| 176 | { |
| 177 | struct atac_softc *atac = chp->ch_atac; |
| 178 | struct wdc_softc *wdc = CHAN_TO_WDC(chp); |
| 179 | struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; |
| 180 | struct ata_bio *ata_bio = xfer->c_cmd; |
| 181 | struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; |
| 182 | int wait_flags; |
| 183 | const char *errstring; |
| 184 | #ifdef WDC_NO_IDS |
| 185 | wait_flags = AT_POLL; |
| 186 | #else |
| 187 | wait_flags = (xfer->c_flags & C_POLL) ? AT_POLL : 0; |
| 188 | #endif |
| 189 | |
| 190 | ATADEBUG_PRINT(("wdc_ata_bio_start %s:%d:%d state %d drive_flags 0x%x " |
| 191 | "c_flags 0x%x ch_flags 0x%x\n" , |
| 192 | device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, |
| 193 | drvp->state, drvp->drive_flags, xfer->c_flags, chp->ch_flags), |
| 194 | DEBUG_XFERS); |
| 195 | |
| 196 | /* Do control operations specially. */ |
| 197 | if (__predict_false(drvp->state < READY)) { |
| 198 | /* |
| 199 | * Actually, we want to be careful not to mess with the control |
| 200 | * state if the device is currently busy, but we can assume |
| 201 | * that we never get to this point if that's the case. |
| 202 | */ |
| 203 | /* If it's not a polled command, we need the kernel thread */ |
| 204 | if ((xfer->c_flags & C_POLL) == 0 && |
| 205 | (chp->ch_flags & ATACH_TH_RUN) == 0) { |
| 206 | chp->ch_queue->queue_freeze++; |
| 207 | wakeup(&chp->ch_thread); |
| 208 | return; |
| 209 | } |
| 210 | /* |
| 211 | * disable interrupts, all commands here should be quick |
| 212 | * enough to be able to poll, and we don't go here that often |
| 213 | */ |
| 214 | if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) |
| 215 | bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, |
| 216 | wd_aux_ctlr, WDCTL_4BIT | WDCTL_IDS); |
| 217 | if (wdc->select) |
| 218 | wdc->select(chp, xfer->c_drive); |
| 219 | bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, |
| 220 | WDSD_IBM | (xfer->c_drive << 4)); |
| 221 | DELAY(10); |
| 222 | errstring = "wait" ; |
| 223 | if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) |
| 224 | goto ctrltimeout; |
| 225 | wdccommandshort(chp, xfer->c_drive, WDCC_RECAL); |
| 226 | /* Wait for at last 400ns for status bit to be valid */ |
| 227 | DELAY(1); |
| 228 | errstring = "recal" ; |
| 229 | if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) |
| 230 | goto ctrltimeout; |
| 231 | if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) |
| 232 | goto ctrlerror; |
| 233 | /* Don't try to set modes if controller can't be adjusted */ |
| 234 | if (atac->atac_set_modes == NULL) |
| 235 | goto geometry; |
| 236 | /* Also don't try if the drive didn't report its mode */ |
| 237 | if ((drvp->drive_flags & ATA_DRIVE_MODE) == 0) |
| 238 | goto geometry; |
| 239 | wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, |
| 240 | 0x08 | drvp->PIO_mode, WDSF_SET_MODE); |
| 241 | errstring = "piomode" ; |
| 242 | if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) |
| 243 | goto ctrltimeout; |
| 244 | if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) |
| 245 | goto ctrlerror; |
| 246 | #if NATA_DMA |
| 247 | #if NATA_UDMA |
| 248 | if (drvp->drive_flags & ATA_DRIVE_UDMA) { |
| 249 | wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, |
| 250 | 0x40 | drvp->UDMA_mode, WDSF_SET_MODE); |
| 251 | } else |
| 252 | #endif |
| 253 | if (drvp->drive_flags & ATA_DRIVE_DMA) { |
| 254 | wdccommand(chp, drvp->drive, SET_FEATURES, 0, 0, 0, |
| 255 | 0x20 | drvp->DMA_mode, WDSF_SET_MODE); |
| 256 | } else { |
| 257 | goto geometry; |
| 258 | } |
| 259 | errstring = "dmamode" ; |
| 260 | if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) |
| 261 | goto ctrltimeout; |
| 262 | if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) |
| 263 | goto ctrlerror; |
| 264 | #endif /* NATA_DMA */ |
| 265 | geometry: |
| 266 | if (ata_bio->flags & ATA_LBA) |
| 267 | goto multimode; |
| 268 | wdccommand(chp, xfer->c_drive, WDCC_IDP, |
| 269 | ata_bio->lp->d_ncylinders, |
| 270 | ata_bio->lp->d_ntracks - 1, 0, ata_bio->lp->d_nsectors, |
| 271 | (ata_bio->lp->d_type == DKTYPE_ST506) ? |
| 272 | ata_bio->lp->d_precompcyl / 4 : 0); |
| 273 | errstring = "geometry" ; |
| 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 | multimode: |
| 279 | if (ata_bio->multi == 1) |
| 280 | goto ready; |
| 281 | wdccommand(chp, xfer->c_drive, WDCC_SETMULTI, 0, 0, 0, |
| 282 | ata_bio->multi, 0); |
| 283 | errstring = "setmulti" ; |
| 284 | if (wdcwait(chp, WDCS_DRDY, WDCS_DRDY, ATA_DELAY, wait_flags)) |
| 285 | goto ctrltimeout; |
| 286 | if (chp->ch_status & (WDCS_ERR | WDCS_DWF)) |
| 287 | goto ctrlerror; |
| 288 | ready: |
| 289 | drvp->state = READY; |
| 290 | /* |
| 291 | * The drive is usable now |
| 292 | */ |
| 293 | if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) |
| 294 | bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, |
| 295 | wd_aux_ctlr, WDCTL_4BIT); |
| 296 | delay(10); /* some drives need a little delay here */ |
| 297 | } |
| 298 | |
| 299 | _wdc_ata_bio_start(chp, xfer); |
| 300 | return; |
| 301 | ctrltimeout: |
| 302 | printf("%s:%d:%d: %s timed out\n" , |
| 303 | device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, |
| 304 | errstring); |
| 305 | ata_bio->error = TIMEOUT; |
| 306 | goto ctrldone; |
| 307 | ctrlerror: |
| 308 | printf("%s:%d:%d: %s " , |
| 309 | device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, |
| 310 | errstring); |
| 311 | if (chp->ch_status & WDCS_DWF) { |
| 312 | printf("drive fault\n" ); |
| 313 | ata_bio->error = ERR_DF; |
| 314 | } else { |
| 315 | printf("error (%x)\n" , chp->ch_error); |
| 316 | ata_bio->r_error = chp->ch_error; |
| 317 | ata_bio->error = ERROR; |
| 318 | } |
| 319 | ctrldone: |
| 320 | drvp->state = 0; |
| 321 | wdc_ata_bio_done(chp, xfer); |
| 322 | |
| 323 | if (! (wdc->cap & WDC_CAPABILITY_NO_AUXCTL)) |
| 324 | bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, |
| 325 | WDCTL_4BIT); |
| 326 | return; |
| 327 | } |
| 328 | |
| 329 | static void |
| 330 | _wdc_ata_bio_start(struct ata_channel *chp, struct ata_xfer *xfer) |
| 331 | { |
| 332 | struct atac_softc *atac = chp->ch_atac; |
| 333 | struct wdc_softc *wdc = CHAN_TO_WDC(chp); |
| 334 | struct wdc_regs *wdr = &wdc->regs[chp->ch_channel]; |
| 335 | struct ata_bio *ata_bio = xfer->c_cmd; |
| 336 | struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; |
| 337 | int wait_flags = (xfer->c_flags & C_POLL) ? AT_POLL : 0; |
| 338 | uint16_t cyl; |
| 339 | uint8_t head, sect, cmd = 0; |
| 340 | int nblks; |
| 341 | #if NATA_DMA || NATA_PIOBM |
| 342 | int error, dma_flags = 0; |
| 343 | #endif |
| 344 | |
| 345 | ATADEBUG_PRINT(("_wdc_ata_bio_start %s:%d:%d\n" , |
| 346 | device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive), |
| 347 | DEBUG_INTR | DEBUG_XFERS); |
| 348 | |
| 349 | #if NATA_DMA || NATA_PIOBM |
| 350 | if (xfer->c_flags & (C_DMA | C_PIOBM)) { |
| 351 | #if NATA_DMA |
| 352 | if (drvp->n_xfers <= NXFER) |
| 353 | drvp->n_xfers++; |
| 354 | #endif |
| 355 | dma_flags = (ata_bio->flags & ATA_READ) ? WDC_DMA_READ : 0; |
| 356 | if (ata_bio->flags & ATA_LBA48) |
| 357 | dma_flags |= WDC_DMA_LBA48; |
| 358 | } |
| 359 | #endif |
| 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 NATA_DMA |
| 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 | error = (*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); |
| 425 | if (error) { |
| 426 | if (error == EINVAL) { |
| 427 | /* |
| 428 | * We can't do DMA on this transfer |
| 429 | * for some reason. Fall back to |
| 430 | * PIO. |
| 431 | */ |
| 432 | xfer->c_flags &= ~C_DMA; |
| 433 | error = 0; |
| 434 | goto do_pio; |
| 435 | } |
| 436 | ata_bio->error = ERR_DMA; |
| 437 | ata_bio->r_error = 0; |
| 438 | wdc_ata_bio_done(chp, xfer); |
| 439 | return; |
| 440 | } |
| 441 | /* Initiate command */ |
| 442 | if (wdc->select) |
| 443 | wdc->select(chp, xfer->c_drive); |
| 444 | bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], |
| 445 | 0, WDSD_IBM | (xfer->c_drive << 4)); |
| 446 | switch(wdc_wait_for_ready(chp, ATA_DELAY, wait_flags)) { |
| 447 | case WDCWAIT_OK: |
| 448 | break; |
| 449 | case WDCWAIT_TOUT: |
| 450 | goto timeout; |
| 451 | case WDCWAIT_THR: |
| 452 | return; |
| 453 | } |
| 454 | if (ata_bio->flags & ATA_LBA48) { |
| 455 | wdccommandext(chp, xfer->c_drive, atacmd_to48(cmd), |
| 456 | ata_bio->blkno, nblks, 0, WDSD_LBA); |
| 457 | } else { |
| 458 | wdccommand(chp, xfer->c_drive, cmd, cyl, |
| 459 | head, sect, nblks, 0); |
| 460 | } |
| 461 | /* start the DMA channel */ |
| 462 | (*wdc->dma_start)(wdc->dma_arg, |
| 463 | chp->ch_channel, xfer->c_drive); |
| 464 | chp->ch_flags |= ATACH_DMA_WAIT; |
| 465 | /* start timeout machinery */ |
| 466 | if ((xfer->c_flags & C_POLL) == 0) |
| 467 | callout_reset(&chp->ch_callout, |
| 468 | ATA_DELAY / 1000 * hz, wdctimeout, chp); |
| 469 | /* wait for irq */ |
| 470 | goto intr; |
| 471 | } /* else not DMA */ |
| 472 | do_pio: |
| 473 | #endif /* NATA_DMA */ |
| 474 | #if NATA_PIOBM |
| 475 | if ((xfer->c_flags & C_PIOBM) && xfer->c_skip == 0) { |
| 476 | if (ata_bio->flags & ATA_POLL) { |
| 477 | /* XXX not supported yet --- fall back to PIO */ |
| 478 | xfer->c_flags &= ~C_PIOBM; |
| 479 | } else { |
| 480 | /* Init the DMA channel. */ |
| 481 | error = (*wdc->dma_init)(wdc->dma_arg, |
| 482 | chp->ch_channel, xfer->c_drive, |
| 483 | (char *)xfer->c_databuf + xfer->c_skip, |
| 484 | xfer->c_bcount, |
| 485 | dma_flags | WDC_DMA_PIOBM_ATA); |
| 486 | if (error) { |
| 487 | if (error == EINVAL) { |
| 488 | /* |
| 489 | * We can't do DMA on this |
| 490 | * transfer for some reason. |
| 491 | * Fall back to PIO. |
| 492 | */ |
| 493 | xfer->c_flags &= ~C_PIOBM; |
| 494 | error = 0; |
| 495 | } else { |
| 496 | ata_bio->error = ERR_DMA; |
| 497 | ata_bio->r_error = 0; |
| 498 | wdc_ata_bio_done(chp, xfer); |
| 499 | return; |
| 500 | } |
| 501 | } |
| 502 | } |
| 503 | } |
| 504 | #endif |
| 505 | ata_bio->nblks = min(nblks, ata_bio->multi); |
| 506 | ata_bio->nbytes = ata_bio->nblks * ata_bio->lp->d_secsize; |
| 507 | KASSERT(nblks == 1 || (ata_bio->flags & ATA_SINGLE) == 0); |
| 508 | if (ata_bio->nblks > 1) { |
| 509 | cmd = (ata_bio->flags & ATA_READ) ? |
| 510 | WDCC_READMULTI : WDCC_WRITEMULTI; |
| 511 | } else { |
| 512 | cmd = (ata_bio->flags & ATA_READ) ? |
| 513 | WDCC_READ : WDCC_WRITE; |
| 514 | } |
| 515 | /* Initiate command! */ |
| 516 | if (wdc->select) |
| 517 | wdc->select(chp, xfer->c_drive); |
| 518 | bus_space_write_1(wdr->cmd_iot, wdr->cmd_iohs[wd_sdh], 0, |
| 519 | WDSD_IBM | (xfer->c_drive << 4)); |
| 520 | switch(wdc_wait_for_ready(chp, ATA_DELAY, wait_flags)) { |
| 521 | case WDCWAIT_OK: |
| 522 | break; |
| 523 | case WDCWAIT_TOUT: |
| 524 | goto timeout; |
| 525 | case WDCWAIT_THR: |
| 526 | return; |
| 527 | } |
| 528 | if (ata_bio->flags & ATA_LBA48) { |
| 529 | wdccommandext(chp, xfer->c_drive, atacmd_to48(cmd), |
| 530 | ata_bio->blkno, nblks, 0, WDSD_LBA); |
| 531 | } else { |
| 532 | wdccommand(chp, xfer->c_drive, cmd, cyl, |
| 533 | head, sect, nblks, |
| 534 | (ata_bio->lp->d_type == DKTYPE_ST506) ? |
| 535 | ata_bio->lp->d_precompcyl / 4 : 0); |
| 536 | } |
| 537 | /* start timeout machinery */ |
| 538 | if ((xfer->c_flags & C_POLL) == 0) |
| 539 | callout_reset(&chp->ch_callout, |
| 540 | ATA_DELAY / 1000 * hz, wdctimeout, chp); |
| 541 | } else if (ata_bio->nblks > 1) { |
| 542 | /* The number of blocks in the last stretch may be smaller. */ |
| 543 | nblks = xfer->c_bcount / ata_bio->lp->d_secsize; |
| 544 | if (ata_bio->nblks > nblks) { |
| 545 | ata_bio->nblks = nblks; |
| 546 | ata_bio->nbytes = xfer->c_bcount; |
| 547 | } |
| 548 | } |
| 549 | /* If this was a write and not using DMA, push the data. */ |
| 550 | if ((ata_bio->flags & ATA_READ) == 0) { |
| 551 | /* |
| 552 | * we have to busy-wait here, we can't rely on running in |
| 553 | * thread context. |
| 554 | */ |
| 555 | if (wdc_wait_for_drq(chp, ATA_DELAY, AT_POLL) != 0) { |
| 556 | printf("%s:%d:%d: timeout waiting for DRQ, " |
| 557 | "st=0x%02x, err=0x%02x\n" , |
| 558 | device_xname(atac->atac_dev), chp->ch_channel, |
| 559 | xfer->c_drive, chp->ch_status, chp->ch_error); |
| 560 | if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) |
| 561 | ata_bio->error = TIMEOUT; |
| 562 | wdc_ata_bio_done(chp, xfer); |
| 563 | return; |
| 564 | } |
| 565 | if (wdc_ata_err(drvp, ata_bio) == WDC_ATA_ERR) { |
| 566 | wdc_ata_bio_done(chp, xfer); |
| 567 | return; |
| 568 | } |
| 569 | #if NATA_PIOBM |
| 570 | if (xfer->c_flags & C_PIOBM) { |
| 571 | /* start the busmastering PIO */ |
| 572 | (*wdc->piobm_start)(wdc->dma_arg, |
| 573 | chp->ch_channel, xfer->c_drive, |
| 574 | xfer->c_skip, ata_bio->nbytes, 0); |
| 575 | chp->ch_flags |= ATACH_DMA_WAIT; |
| 576 | } else |
| 577 | #endif |
| 578 | |
| 579 | wdc->dataout_pio(chp, drvp->drive_flags, |
| 580 | (char *)xfer->c_databuf + xfer->c_skip, ata_bio->nbytes); |
| 581 | } |
| 582 | |
| 583 | #if NATA_DMA |
| 584 | intr: |
| 585 | #endif |
| 586 | /* Wait for IRQ (either real or polled) */ |
| 587 | if ((ata_bio->flags & ATA_POLL) == 0) { |
| 588 | chp->ch_flags |= ATACH_IRQ_WAIT; |
| 589 | } else { |
| 590 | /* Wait for at last 400ns for status bit to be valid */ |
| 591 | delay(1); |
| 592 | #if NATA_DMA |
| 593 | if (chp->ch_flags & ATACH_DMA_WAIT) { |
| 594 | wdc_dmawait(chp, xfer, ATA_DELAY); |
| 595 | chp->ch_flags &= ~ATACH_DMA_WAIT; |
| 596 | } |
| 597 | #endif |
| 598 | wdc_ata_bio_intr(chp, xfer, 0); |
| 599 | if ((ata_bio->flags & ATA_ITSDONE) == 0) |
| 600 | goto again; |
| 601 | } |
| 602 | return; |
| 603 | timeout: |
| 604 | printf("%s:%d:%d: not ready, st=0x%02x, err=0x%02x\n" , |
| 605 | device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, |
| 606 | chp->ch_status, chp->ch_error); |
| 607 | if (wdc_ata_err(drvp, ata_bio) != WDC_ATA_ERR) |
| 608 | ata_bio->error = TIMEOUT; |
| 609 | wdc_ata_bio_done(chp, xfer); |
| 610 | return; |
| 611 | } |
| 612 | |
| 613 | static int |
| 614 | wdc_ata_bio_intr(struct ata_channel *chp, struct ata_xfer *xfer, int irq) |
| 615 | { |
| 616 | struct atac_softc *atac = chp->ch_atac; |
| 617 | struct wdc_softc *wdc = CHAN_TO_WDC(chp); |
| 618 | struct ata_bio *ata_bio = xfer->c_cmd; |
| 619 | struct ata_drive_datas *drvp = &chp->ch_drive[xfer->c_drive]; |
| 620 | int drv_err; |
| 621 | |
| 622 | ATADEBUG_PRINT(("wdc_ata_bio_intr %s:%d:%d\n" , |
| 623 | device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive), |
| 624 | DEBUG_INTR | DEBUG_XFERS); |
| 625 | |
| 626 | |
| 627 | /* Is it not a transfer, but a control operation? */ |
| 628 | if (drvp->state < READY) { |
| 629 | printf("%s:%d:%d: bad state %d in wdc_ata_bio_intr\n" , |
| 630 | device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, |
| 631 | drvp->state); |
| 632 | panic("wdc_ata_bio_intr: bad state" ); |
| 633 | } |
| 634 | |
| 635 | /* |
| 636 | * if we missed an interrupt in a PIO transfer, reset and restart. |
| 637 | * Don't try to continue transfer, we may have missed cycles. |
| 638 | */ |
| 639 | if ((xfer->c_flags & (C_TIMEOU | C_DMA)) == C_TIMEOU) { |
| 640 | ata_bio->error = TIMEOUT; |
| 641 | wdc_ata_bio_done(chp, xfer); |
| 642 | return 1; |
| 643 | } |
| 644 | |
| 645 | #if NATA_PIOBM |
| 646 | /* Transfer-done interrupt for busmastering PIO read */ |
| 647 | if ((xfer->c_flags & C_PIOBM) && (chp->ch_flags & ATACH_PIOBM_WAIT)) { |
| 648 | chp->ch_flags &= ~ATACH_PIOBM_WAIT; |
| 649 | goto end; |
| 650 | } |
| 651 | #endif |
| 652 | |
| 653 | /* Ack interrupt done by wdc_wait_for_unbusy */ |
| 654 | if (wdc_wait_for_unbusy(chp, (irq == 0) ? ATA_DELAY : 0, AT_POLL) < 0) { |
| 655 | if (irq && (xfer->c_flags & C_TIMEOU) == 0) |
| 656 | return 0; /* IRQ was not for us */ |
| 657 | printf("%s:%d:%d: device timeout, c_bcount=%d, c_skip%d\n" , |
| 658 | device_xname(atac->atac_dev), chp->ch_channel, xfer->c_drive, |
| 659 | xfer->c_bcount, xfer->c_skip); |
| 660 | ata_bio->error = TIMEOUT; |
| 661 | wdc_ata_bio_done(chp, xfer); |
| 662 | return 1; |
| 663 | } |
| 664 | if (wdc->irqack) |
| 665 | wdc->irqack(chp); |
| 666 | |
| 667 | drv_err = wdc_ata_err(drvp, ata_bio); |
| 668 | |
| 669 | #if NATA_DMA |
| 670 | /* If we were using DMA, Turn off the DMA channel and check for error */ |
| 671 | if (xfer->c_flags & C_DMA) { |
| 672 | if (ata_bio->flags & ATA_POLL) { |
| 673 | /* |
| 674 | * IDE drives deassert WDCS_BSY before transfer is |
| 675 | * complete when using DMA. Polling for DRQ to deassert |
| 676 | * is not enough DRQ is not required to be |
| 677 | * asserted for DMA transfers, so poll for DRDY. |
| 678 | */ |
| 679 | if (wdcwait(chp, WDCS_DRDY | WDCS_DRQ, WDCS_DRDY, |
| 680 | ATA_DELAY, ATA_POLL) == WDCWAIT_TOUT) { |
| 681 | printf("%s:%d:%d: polled transfer timed out " |
| 682 | "(st=0x%x)\n" , |
| 683 | device_xname(atac->atac_dev), |
| 684 | chp->ch_channel, xfer->c_drive, |
| 685 | chp->ch_status); |
| 686 | ata_bio->error = TIMEOUT; |
| 687 | drv_err = WDC_ATA_ERR; |
| 688 | } |
| 689 | } |
| 690 | if (wdc->dma_status != 0) { |
| 691 | if (drv_err != WDC_ATA_ERR) { |
| 692 | ata_bio->error = ERR_DMA; |
| 693 | drv_err = WDC_ATA_ERR; |
| 694 | } |
| 695 | } |
| 696 | if (chp->ch_status & WDCS_DRQ) { |
| 697 | if (drv_err != WDC_ATA_ERR) { |
| 698 | printf("%s:%d:%d: intr with DRQ (st=0x%x)\n" , |
| 699 | device_xname(atac->atac_dev), |
| 700 | chp->ch_channel, |
| 701 | xfer->c_drive, chp->ch_status); |
| 702 | ata_bio->error = TIMEOUT; |
| 703 | drv_err = WDC_ATA_ERR; |
| 704 | } |
| 705 | } |
| 706 | if (drv_err != WDC_ATA_ERR) |
| 707 | goto end; |
| 708 | if (ata_bio->r_error & WDCE_CRC || ata_bio->error == ERR_DMA) |
| 709 | ata_dmaerr(drvp, (xfer->c_flags & C_POLL) ? AT_POLL : 0); |
| 710 | } |
| 711 | #endif /* NATA_DMA */ |
| 712 | |
| 713 | /* if we had an error, end */ |
| 714 | if (drv_err == WDC_ATA_ERR) { |
| 715 | wdc_ata_bio_done(chp, xfer); |
| 716 | return 1; |
| 717 | } |
| 718 | |
| 719 | /* If this was a read and not using DMA, fetch the data. */ |
| 720 | if ((ata_bio->flags & ATA_READ) != 0) { |
| 721 | if ((chp->ch_status & WDCS_DRQ) != WDCS_DRQ) { |
| 722 | printf("%s:%d:%d: read intr before drq\n" , |
| 723 | device_xname(atac->atac_dev), chp->ch_channel, |
| 724 | xfer->c_drive); |
| 725 | ata_bio->error = TIMEOUT; |
| 726 | wdc_ata_bio_done(chp, xfer); |
| 727 | return 1; |
| 728 | } |
| 729 | #if NATA_PIOBM |
| 730 | if (xfer->c_flags & C_PIOBM) { |
| 731 | /* start the busmastering PIO */ |
| 732 | (*wdc->piobm_start)(wdc->dma_arg, |
| 733 | chp->ch_channel, xfer->c_drive, |
| 734 | xfer->c_skip, ata_bio->nbytes, |
| 735 | WDC_PIOBM_XFER_IRQ); |
| 736 | chp->ch_flags |= ATACH_DMA_WAIT | ATACH_PIOBM_WAIT | ATACH_IRQ_WAIT; |
| 737 | return 1; |
| 738 | } else |
| 739 | #endif |
| 740 | wdc->datain_pio(chp, drvp->drive_flags, |
| 741 | (char *)xfer->c_databuf + xfer->c_skip, ata_bio->nbytes); |
| 742 | } |
| 743 | |
| 744 | #if NATA_DMA || NATA_PIOBM |
| 745 | end: |
| 746 | #endif |
| 747 | ata_bio->blkno += ata_bio->nblks; |
| 748 | ata_bio->blkdone += ata_bio->nblks; |
| 749 | xfer->c_skip += ata_bio->nbytes; |
| 750 | xfer->c_bcount -= ata_bio->nbytes; |
| 751 | /* See if this transfer is complete. */ |
| 752 | if (xfer->c_bcount > 0) { |
| 753 | if ((ata_bio->flags & ATA_POLL) == 0) { |
| 754 | /* Start the next operation */ |
| 755 | _wdc_ata_bio_start(chp, xfer); |
| 756 | } else { |
| 757 | /* Let _wdc_ata_bio_start do the loop */ |
| 758 | return 1; |
| 759 | } |
| 760 | } else { /* Done with this transfer */ |
| 761 | ata_bio->error = NOERROR; |
| 762 | wdc_ata_bio_done(chp, xfer); |
| 763 | } |
| 764 | return 1; |
| 765 | } |
| 766 | |
| 767 | static void |
| 768 | wdc_ata_bio_kill_xfer(struct ata_channel *chp, struct ata_xfer *xfer, |
| 769 | int reason) |
| 770 | { |
| 771 | struct ata_bio *ata_bio = xfer->c_cmd; |
| 772 | int drive = xfer->c_drive; |
| 773 | |
| 774 | ata_free_xfer(chp, xfer); |
| 775 | |
| 776 | ata_bio->flags |= ATA_ITSDONE; |
| 777 | switch (reason) { |
| 778 | case KILL_GONE: |
| 779 | ata_bio->error = ERR_NODEV; |
| 780 | break; |
| 781 | case KILL_RESET: |
| 782 | ata_bio->error = ERR_RESET; |
| 783 | break; |
| 784 | default: |
| 785 | printf("wdc_ata_bio_kill_xfer: unknown reason %d\n" , |
| 786 | reason); |
| 787 | panic("wdc_ata_bio_kill_xfer" ); |
| 788 | } |
| 789 | ata_bio->r_error = WDCE_ABRT; |
| 790 | ATADEBUG_PRINT(("wdc_ata_bio_kill_xfer: drv_done\n" ), DEBUG_XFERS); |
| 791 | (*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc); |
| 792 | } |
| 793 | |
| 794 | static void |
| 795 | wdc_ata_bio_done(struct ata_channel *chp, struct ata_xfer *xfer) |
| 796 | { |
| 797 | struct ata_bio *ata_bio = xfer->c_cmd; |
| 798 | int drive = xfer->c_drive; |
| 799 | |
| 800 | ATADEBUG_PRINT(("wdc_ata_bio_done %s:%d:%d: flags 0x%x\n" , |
| 801 | device_xname(chp->ch_atac->atac_dev), chp->ch_channel, |
| 802 | xfer->c_drive, (u_int)xfer->c_flags), |
| 803 | DEBUG_XFERS); |
| 804 | |
| 805 | callout_stop(&chp->ch_callout); |
| 806 | |
| 807 | /* feed back residual bcount to our caller */ |
| 808 | ata_bio->bcount = xfer->c_bcount; |
| 809 | |
| 810 | /* mark controller inactive and free xfer */ |
| 811 | chp->ch_queue->active_xfer = NULL; |
| 812 | ata_free_xfer(chp, xfer); |
| 813 | |
| 814 | if (chp->ch_drive[drive].drive_flags & ATA_DRIVE_WAITDRAIN) { |
| 815 | ata_bio->error = ERR_NODEV; |
| 816 | chp->ch_drive[drive].drive_flags &= ~ATA_DRIVE_WAITDRAIN; |
| 817 | wakeup(&chp->ch_queue->active_xfer); |
| 818 | } |
| 819 | ata_bio->flags |= ATA_ITSDONE; |
| 820 | ATADEBUG_PRINT(("wdc_ata_done: drv_done\n" ), DEBUG_XFERS); |
| 821 | (*chp->ch_drive[drive].drv_done)(chp->ch_drive[drive].drv_softc); |
| 822 | ATADEBUG_PRINT(("atastart from wdc_ata_done, flags 0x%x\n" , |
| 823 | chp->ch_flags), DEBUG_XFERS); |
| 824 | atastart(chp); |
| 825 | } |
| 826 | |
| 827 | static int |
| 828 | wdc_ata_err(struct ata_drive_datas *drvp, struct ata_bio *ata_bio) |
| 829 | { |
| 830 | struct ata_channel *chp = drvp->chnl_softc; |
| 831 | ata_bio->error = 0; |
| 832 | if (chp->ch_status & WDCS_BSY) { |
| 833 | ata_bio->error = TIMEOUT; |
| 834 | return WDC_ATA_ERR; |
| 835 | } |
| 836 | |
| 837 | if (chp->ch_status & WDCS_DWF) { |
| 838 | ata_bio->error = ERR_DF; |
| 839 | return WDC_ATA_ERR; |
| 840 | } |
| 841 | |
| 842 | if (chp->ch_status & WDCS_ERR) { |
| 843 | ata_bio->error = ERROR; |
| 844 | ata_bio->r_error = chp->ch_error; |
| 845 | if (ata_bio->r_error & (WDCE_BBK | WDCE_UNC | WDCE_IDNF | |
| 846 | WDCE_ABRT | WDCE_TK0NF | WDCE_AMNF)) |
| 847 | return WDC_ATA_ERR; |
| 848 | return WDC_ATA_NOERR; |
| 849 | } |
| 850 | |
| 851 | if (chp->ch_status & WDCS_CORR) |
| 852 | ata_bio->flags |= ATA_CORR; |
| 853 | return WDC_ATA_NOERR; |
| 854 | } |
| 855 | |
| 856 | static int |
| 857 | wdc_ata_addref(struct ata_drive_datas *drvp) |
| 858 | { |
| 859 | struct ata_channel *chp = drvp->chnl_softc; |
| 860 | |
| 861 | return (ata_addref(chp)); |
| 862 | } |
| 863 | |
| 864 | static void |
| 865 | wdc_ata_delref(struct ata_drive_datas *drvp) |
| 866 | { |
| 867 | struct ata_channel *chp = drvp->chnl_softc; |
| 868 | |
| 869 | ata_delref(chp); |
| 870 | } |
| 871 | |