sys/dev/disk/nata/ata-pci.c

   1 /*-
   2  * Copyright (c) 1998 - 2006 Søren Schmidt <sos@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    without modification, immediately at the beginning of the file.
  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  * $FreeBSD: src/sys/dev/ata/ata-pci.c,v 1.121 2007/02/23 12:18:33 piso Exp $
  27  * $DragonFly: src/sys/dev/disk/nata/ata-pci.c,v 1.5 2007/06/05 18:30:40 swildner Exp $
  28  */
  29
  30 #include "opt_ata.h"
  31
  32 #include <sys/param.h>
  33 #include <sys/bus.h>
  34 #include <sys/bus_resource.h>
  35 #include <sys/malloc.h>
  36 #include <sys/module.h>
  37 #include <sys/nata.h>
  38 #include <sys/rman.h>
  39 #include <sys/systm.h>
  40
  41 #include <bus/pci/pcireg.h>
  42 #include <bus/pci/pcivar.h>
  43
  44 #include "ata-all.h"
  45 #include "ata-pci.h"
  46 #include "ata_if.h"
  47
  48 /* local vars */
  49 static MALLOC_DEFINE(M_ATAPCI, "ata_pci", "ATA driver PCI");
  50
  51 /* misc defines */
  52 #define IOMASK                  0xfffffffc
  53 #define ATA_PROBE_OK            -10
  54
  55 int
  56 ata_legacy(device_t dev)
  57 {
  58     return (((pci_read_config(dev, PCIR_PROGIF, 1)&PCIP_STORAGE_IDE_MASTERDEV)&&
  59             ((pci_read_config(dev, PCIR_PROGIF, 1) &
  60               (PCIP_STORAGE_IDE_MODEPRIM | PCIP_STORAGE_IDE_MODESEC)) !=
  61              (PCIP_STORAGE_IDE_MODEPRIM | PCIP_STORAGE_IDE_MODESEC))) ||
  62             (!pci_read_config(dev, PCIR_BAR(0), 4) &&
  63              !pci_read_config(dev, PCIR_BAR(1), 4) &&
  64              !pci_read_config(dev, PCIR_BAR(2), 4) &&
  65              !pci_read_config(dev, PCIR_BAR(3), 4)));
  66
  67 }
  68
  69 int
  70 ata_pci_probe(device_t dev)
  71 {
  72     if (pci_get_class(dev) != PCIC_STORAGE)
  73         return ENXIO;
  74
  75     switch (pci_get_vendor(dev)) {
  76     case ATA_ACARD_ID:
  77         if (!ata_acard_ident(dev))
  78             return ATA_PROBE_OK;
  79         break;
  80     case ATA_ACER_LABS_ID:
  81         if (!ata_ali_ident(dev))
  82             return ATA_PROBE_OK;
  83         break;
  84     case ATA_AMD_ID:
  85         if (!ata_amd_ident(dev))
  86             return ATA_PROBE_OK;
  87         break;
  88     case ATA_ATI_ID:
  89         if (!ata_ati_ident(dev))
  90             return ATA_PROBE_OK;
  91         break;
  92     case ATA_CYRIX_ID:
  93         if (!ata_cyrix_ident(dev))
  94             return ATA_PROBE_OK;
  95         break;
  96     case ATA_CYPRESS_ID:
  97         if (!ata_cypress_ident(dev))
  98             return ATA_PROBE_OK;
  99         break;
 100     case ATA_HIGHPOINT_ID:
 101         if (!ata_highpoint_ident(dev))
 102             return ATA_PROBE_OK;
 103         break;
 104     case ATA_INTEL_ID:
 105         if (!ata_intel_ident(dev))
 106             return ATA_PROBE_OK;
 107         break;
 108     case ATA_ITE_ID:
 109         if (!ata_ite_ident(dev))
 110             return ATA_PROBE_OK;
 111         break;
 112     case ATA_JMICRON_ID:
 113         if (!ata_jmicron_ident(dev))
 114             return ATA_PROBE_OK;
 115         break;
 116     case ATA_MARVELL_ID:
 117         if (!ata_marvell_ident(dev))
 118             return ATA_PROBE_OK;
 119         break;
 120     case ATA_NATIONAL_ID:
 121         if (!ata_national_ident(dev))
 122             return ATA_PROBE_OK;
 123         break;
 124     case ATA_NETCELL_ID:
 125         if (!ata_netcell_ident(dev))
 126             return ATA_PROBE_OK;
 127         break;
 128     case ATA_NVIDIA_ID:
 129         if (!ata_nvidia_ident(dev))
 130             return ATA_PROBE_OK;
 131         break;
 132     case ATA_PROMISE_ID:
 133         if (!ata_promise_ident(dev))
 134             return ATA_PROBE_OK;
 135         break;
 136     case ATA_SERVERWORKS_ID:
 137         if (!ata_serverworks_ident(dev))
 138             return ATA_PROBE_OK;
 139         break;
 140     case ATA_SILICON_IMAGE_ID:
 141         if (!ata_sii_ident(dev))
 142             return ATA_PROBE_OK;
 143         break;
 144     case ATA_SIS_ID:
 145         if (!ata_sis_ident(dev))
 146             return ATA_PROBE_OK;
 147         break;
 148     case ATA_VIA_ID:
 149         if (!ata_via_ident(dev))
 150             return ATA_PROBE_OK;
 151         break;
 152     case ATA_CENATEK_ID:
 153         if (pci_get_devid(dev) == ATA_CENATEK_ROCKET) {
 154             ata_generic_ident(dev);
 155             device_set_desc(dev, "Cenatek Rocket Drive controller");
 156             return ATA_PROBE_OK;
 157         }
 158         break;
 159     case ATA_MICRON_ID:
 160         if (pci_get_devid(dev) == ATA_MICRON_RZ1000 ||
 161             pci_get_devid(dev) == ATA_MICRON_RZ1001) {
 162             ata_generic_ident(dev);
 163             device_set_desc(dev,
 164                 "RZ 100? ATA controller !WARNING! data loss/corruption risk");
 165             return ATA_PROBE_OK;
 166         }
 167         break;
 168     }
 169
 170     /* unknown chipset, try generic DMA if it seems possible */
 171     if ((pci_get_class(dev) == PCIC_STORAGE) &&
 172         (pci_get_subclass(dev) == PCIS_STORAGE_IDE)) {
 173         if (!ata_generic_ident(dev))
 174             return ATA_PROBE_OK;
 175     }
 176     return ENXIO;
 177 }
 178
 179 int
 180 ata_pci_attach(device_t dev)
 181 {
 182     struct ata_pci_controller *ctlr = device_get_softc(dev);
 183     u_int32_t cmd;
 184     int unit;
 185
 186     /* do chipset specific setups only needed once */
 187     if (ata_legacy(dev) || pci_read_config(dev, PCIR_BAR(2), 4) & IOMASK)
 188         ctlr->channels = 2;
 189     else
 190         ctlr->channels = 1;
 191     ctlr->allocate = ata_pci_allocate;
 192     ctlr->dmainit = ata_pci_dmainit;
 193     ctlr->dev = dev;
 194
 195     /* if needed try to enable busmastering */
 196     cmd = pci_read_config(dev, PCIR_COMMAND, 2);
 197     if (!(cmd & PCIM_CMD_BUSMASTEREN)) {
 198         pci_write_config(dev, PCIR_COMMAND, cmd | PCIM_CMD_BUSMASTEREN, 2);
 199         cmd = pci_read_config(dev, PCIR_COMMAND, 2);
 200     }
 201
 202     /* if busmastering mode "stuck" use it */
 203     if ((cmd & PCIM_CMD_BUSMASTEREN) == PCIM_CMD_BUSMASTEREN) {
 204         ctlr->r_type1 = SYS_RES_IOPORT;
 205         ctlr->r_rid1 = ATA_BMADDR_RID;
 206         ctlr->r_res1 = bus_alloc_resource_any(dev, ctlr->r_type1, &ctlr->r_rid1,
 207                                               RF_ACTIVE);
 208     }
 209
 210     if (ctlr->chipinit(dev))
 211         return ENXIO;
 212
 213     /* attach all channels on this controller */
 214     for (unit = 0; unit < ctlr->channels; unit++) {
 215         int freeunit = 2;
 216         if ((unit == 0 || unit == 1) && ata_legacy(dev)) {
 217             device_add_child(dev, "ata", unit);
 218             continue;
 219         }
 220         /* XXX TGEN devclass_find_free_unit() implementation */
 221         while (freeunit < devclass_get_maxunit(ata_devclass) &&
 222                devclass_get_device(ata_devclass, freeunit) != NULL)
 223             freeunit++;
 224         device_add_child(dev, "ata", freeunit);
 225     }
 226     bus_generic_attach(dev);
 227     return 0;
 228 }
 229
 230 int
 231 ata_pci_detach(device_t dev)
 232 {
 233     struct ata_pci_controller *ctlr = device_get_softc(dev);
 234     device_t *children;
 235     int nchildren, i;
 236
 237     /* detach & delete all children */
 238     if (!device_get_children(dev, &children, &nchildren)) {
 239         for (i = 0; i < nchildren; i++)
 240             device_delete_child(dev, children[i]);
 241         kfree(children, M_TEMP);
 242     }
 243
 244     if (ctlr->r_irq) {
 245         bus_teardown_intr(dev, ctlr->r_irq, ctlr->handle);
 246         bus_release_resource(dev, SYS_RES_IRQ, ATA_IRQ_RID, ctlr->r_irq);
 247     }
 248     if (ctlr->r_res2)
 249         bus_release_resource(dev, ctlr->r_type2, ctlr->r_rid2, ctlr->r_res2);
 250     if (ctlr->r_res1)
 251         bus_release_resource(dev, ctlr->r_type1, ctlr->r_rid1, ctlr->r_res1);
 252
 253     return 0;
 254 }
 255
 256 struct resource *
 257 ata_pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
 258                        u_long start, u_long end, u_long count, u_int flags)
 259 {
 260     struct ata_pci_controller *controller = device_get_softc(dev);
 261     int unit = ((struct ata_channel *)device_get_softc(child))->unit;
 262     struct resource *res = NULL;
 263     int myrid;
 264
 265     if (type == SYS_RES_IOPORT) {
 266         switch (*rid) {
 267         case ATA_IOADDR_RID:
 268             if (ata_legacy(dev)) {
 269                 start = (unit ? ATA_SECONDARY : ATA_PRIMARY);
 270                 count = ATA_IOSIZE;
 271                 end = start + count - 1;
 272             }
 273             myrid = PCIR_BAR(0) + (unit << 3);
 274             res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev,
 275                                      SYS_RES_IOPORT, &myrid,
 276                                      start, end, count, flags);
 277             break;
 278
 279         case ATA_CTLADDR_RID:
 280             if (ata_legacy(dev)) {
 281                 start = (unit ? ATA_SECONDARY : ATA_PRIMARY) + ATA_CTLOFFSET;
 282                 count = ATA_CTLIOSIZE;
 283                 end = start + count - 1;
 284             }
 285             myrid = PCIR_BAR(1) + (unit << 3);
 286             res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev,
 287                                      SYS_RES_IOPORT, &myrid,
 288                                      start, end, count, flags);
 289             break;
 290         }
 291     }
 292     if (type == SYS_RES_IRQ && *rid == ATA_IRQ_RID) {
 293         if (ata_legacy(dev)) {
 294             int irq = (unit == 0 ? 14 : 15);
 295
 296             res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
 297                                      SYS_RES_IRQ, rid, irq, irq, 1, flags);
 298         }
 299         else
 300             res = controller->r_irq;
 301     }
 302     return res;
 303 }
 304
 305 int
 306 ata_pci_release_resource(device_t dev, device_t child, int type, int rid,
 307                          struct resource *r)
 308 {
 309     int unit = ((struct ata_channel *)device_get_softc(child))->unit;
 310
 311     if (type == SYS_RES_IOPORT) {
 312         switch (rid) {
 313         case ATA_IOADDR_RID:
 314             return BUS_RELEASE_RESOURCE(device_get_parent(dev), dev,
 315                                         SYS_RES_IOPORT,
 316                                         PCIR_BAR(0) + (unit << 3), r);
 317             break;
 318
 319         case ATA_CTLADDR_RID:
 320             return BUS_RELEASE_RESOURCE(device_get_parent(dev), dev,
 321                                         SYS_RES_IOPORT,
 322                                         PCIR_BAR(1) + (unit << 3), r);
 323             break;
 324         default:
 325             return ENOENT;
 326         }
 327     }
 328     if (type == SYS_RES_IRQ) {
 329         if (rid != ATA_IRQ_RID)
 330             return ENOENT;
 331
 332         if (ata_legacy(dev)) {
 333             return BUS_RELEASE_RESOURCE(device_get_parent(dev), child,
 334                                         SYS_RES_IRQ, rid, r);
 335         }
 336         else
 337             return 0;
 338     }
 339     return EINVAL;
 340 }
 341
 342 int
 343 ata_pci_setup_intr(device_t dev, device_t child, struct resource *irq,
 344                    int flags, driver_intr_t *function, void *argument,
 345                    void **cookiep)
 346 {
 347     if (ata_legacy(dev)) {
 348         return BUS_SETUP_INTR(device_get_parent(dev), child, irq,
 349                               flags, function, argument, cookiep, NULL);
 350     }
 351     else {
 352         struct ata_pci_controller *controller = device_get_softc(dev);
 353         int unit = ((struct ata_channel *)device_get_softc(child))->unit;
 354
 355         controller->interrupt[unit].function = function;
 356         controller->interrupt[unit].argument = argument;
 357         *cookiep = controller;
 358         return 0;
 359     }
 360 }
 361
 362 int
 363 ata_pci_teardown_intr(device_t dev, device_t child, struct resource *irq,
 364                       void *cookie)
 365 {
 366     if (ata_legacy(dev)) {
 367         return BUS_TEARDOWN_INTR(device_get_parent(dev), child, irq, cookie);
 368     }
 369     else {
 370         struct ata_pci_controller *controller = device_get_softc(dev);
 371         int unit = ((struct ata_channel *)device_get_softc(child))->unit;
 372
 373         controller->interrupt[unit].function = NULL;
 374         controller->interrupt[unit].argument = NULL;
 375         return 0;
 376     }
 377 }
 378
 379 int
 380 ata_pci_allocate(device_t dev)
 381 {
 382     struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
 383     struct ata_channel *ch = device_get_softc(dev);
 384     struct resource *io = NULL, *ctlio = NULL;
 385     int i, rid;
 386
 387     rid = ATA_IOADDR_RID;
 388     if (!(io = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid, RF_ACTIVE)))
 389         return ENXIO;
 390
 391     rid = ATA_CTLADDR_RID;
 392     if (!(ctlio = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,RF_ACTIVE))){
 393         bus_release_resource(dev, SYS_RES_IOPORT, ATA_IOADDR_RID, io);
 394         return ENXIO;
 395     }
 396
 397     for (i = ATA_DATA; i <= ATA_COMMAND; i ++) {
 398         ch->r_io[i].res = io;
 399         ch->r_io[i].offset = i;
 400     }
 401     ch->r_io[ATA_CONTROL].res = ctlio;
 402     ch->r_io[ATA_CONTROL].offset = ata_legacy(device_get_parent(dev)) ? 0 : 2;
 403     ch->r_io[ATA_IDX_ADDR].res = io;
 404     ata_default_registers(dev);
 405     if (ctlr->r_res1) {
 406         for (i = ATA_BMCMD_PORT; i <= ATA_BMDTP_PORT; i++) {
 407             ch->r_io[i].res = ctlr->r_res1;
 408             ch->r_io[i].offset = (i - ATA_BMCMD_PORT) + (ch->unit*ATA_BMIOSIZE);
 409         }
 410     }
 411
 412     ata_pci_hw(dev);
 413     return 0;
 414 }
 415
 416 void
 417 ata_pci_hw(device_t dev)
 418 {
 419     struct ata_channel *ch = device_get_softc(dev);
 420
 421     ata_generic_hw(dev);
 422     ch->hw.status = ata_pci_status;
 423 }
 424
 425 int
 426 ata_pci_status(device_t dev)
 427 {
 428     struct ata_channel *ch = device_get_softc(dev);
 429
 430     if ((dumping || !ata_legacy(device_get_parent(dev))) &&
 431         ch->dma && ((ch->flags & ATA_ALWAYS_DMASTAT) ||
 432                     (ch->dma->flags & ATA_DMA_ACTIVE))) {
 433         int bmstat = ATA_IDX_INB(ch, ATA_BMSTAT_PORT) & ATA_BMSTAT_MASK;
 434
 435         if ((bmstat & (ATA_BMSTAT_ACTIVE | ATA_BMSTAT_INTERRUPT)) !=
 436             ATA_BMSTAT_INTERRUPT)
 437             return 0;
 438         ATA_IDX_OUTB(ch, ATA_BMSTAT_PORT, bmstat & ~ATA_BMSTAT_ERROR);
 439         DELAY(1);
 440     }
 441     if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY) {
 442         DELAY(100);
 443         if (ATA_IDX_INB(ch, ATA_ALTSTAT) & ATA_S_BUSY)
 444             return 0;
 445     }
 446     return 1;
 447 }
 448
 449 static int
 450 ata_pci_dmastart(device_t dev)
 451 {
 452     struct ata_channel *ch = device_get_softc(device_get_parent(dev));
 453     u_int8_t val;
 454
 455     ATA_IDX_OUTB(ch, ATA_BMSTAT_PORT, (ATA_IDX_INB(ch, ATA_BMSTAT_PORT) |
 456                  (ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR)));
 457     ATA_IDX_OUTL(ch, ATA_BMDTP_PORT, ch->dma->sg_bus);
 458     ch->dma->flags |= ATA_DMA_ACTIVE;
 459     val = ATA_IDX_INB(ch, ATA_BMCMD_PORT);
 460     if (ch->dma->flags & ATA_DMA_READ)
 461         val |= ATA_BMCMD_WRITE_READ;
 462     else
 463         val &= ~ATA_BMCMD_WRITE_READ;
 464     ATA_IDX_OUTB(ch, ATA_BMCMD_PORT, val);
 465
 466     /*
 467      * Issue the start command separately from configuration setup,
 468      * in case the hardware latches portions of the configuration.
 469      */
 470     ATA_IDX_OUTB(ch, ATA_BMCMD_PORT, val | ATA_BMCMD_START_STOP);
 471
 472     return 0;
 473 }
 474
 475 static int
 476 ata_pci_dmastop(device_t dev)
 477 {
 478     struct ata_channel *ch = device_get_softc(device_get_parent(dev));
 479     int error;
 480
 481     ATA_IDX_OUTB(ch, ATA_BMCMD_PORT,
 482                  ATA_IDX_INB(ch, ATA_BMCMD_PORT) & ~ATA_BMCMD_START_STOP);
 483     ch->dma->flags &= ~ATA_DMA_ACTIVE;
 484     error = ATA_IDX_INB(ch, ATA_BMSTAT_PORT) & ATA_BMSTAT_MASK;
 485     ATA_IDX_OUTB(ch, ATA_BMSTAT_PORT, ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR);
 486     return error;
 487 }
 488
 489 static void
 490 ata_pci_dmareset(device_t dev)
 491 {
 492     struct ata_channel *ch = device_get_softc(dev);
 493
 494     ATA_IDX_OUTB(ch, ATA_BMCMD_PORT,
 495                  ATA_IDX_INB(ch, ATA_BMCMD_PORT) & ~ATA_BMCMD_START_STOP);
 496     ch->dma->flags &= ~ATA_DMA_ACTIVE;
 497     ATA_IDX_OUTB(ch, ATA_BMSTAT_PORT, ATA_BMSTAT_INTERRUPT | ATA_BMSTAT_ERROR);
 498     ch->dma->unload(dev);
 499 }
 500
 501 void
 502 ata_pci_dmainit(device_t dev)
 503 {
 504     struct ata_channel *ch = device_get_softc(dev);
 505
 506     ata_dmainit(dev);
 507     if (ch->dma) {
 508         ch->dma->start = ata_pci_dmastart;
 509         ch->dma->stop = ata_pci_dmastop;
 510         ch->dma->reset = ata_pci_dmareset;
 511     }
 512 }
 513
 514 static device_method_t ata_pci_methods[] = {
 515     /* device interface */
 516     DEVMETHOD(device_probe,             ata_pci_probe),
 517     DEVMETHOD(device_attach,            ata_pci_attach),
 518     DEVMETHOD(device_detach,            ata_pci_detach),
 519     DEVMETHOD(device_shutdown,          bus_generic_shutdown),
 520     DEVMETHOD(device_suspend,           bus_generic_suspend),
 521     DEVMETHOD(device_resume,            bus_generic_resume),
 522
 523     /* bus methods */
 524     DEVMETHOD(bus_alloc_resource,       ata_pci_alloc_resource),
 525     DEVMETHOD(bus_release_resource,     ata_pci_release_resource),
 526     DEVMETHOD(bus_activate_resource,    bus_generic_activate_resource),
 527     DEVMETHOD(bus_deactivate_resource,  bus_generic_deactivate_resource),
 528     DEVMETHOD(bus_setup_intr,           ata_pci_setup_intr),
 529     DEVMETHOD(bus_teardown_intr,        ata_pci_teardown_intr),
 530
 531     { 0, 0 }
 532 };
 533
 534 devclass_t atapci_devclass;
 535
 536 static driver_t ata_pci_driver = {
 537     "atapci",
 538     ata_pci_methods,
 539     sizeof(struct ata_pci_controller),
 540 };
 541
 542 DRIVER_MODULE(atapci, pci, ata_pci_driver, atapci_devclass, 0, 0);
 543 MODULE_VERSION(atapci, 1);
 544 MODULE_DEPEND(atapci, ata, 1, 1, 1);
 545
 546 static int
 547 ata_pcichannel_probe(device_t dev)
 548 {
 549     struct ata_channel *ch = device_get_softc(dev);
 550     device_t *children;
 551     int count, i;
 552     char buffer[32];
 553
 554     /* take care of green memory */
 555     bzero(ch, sizeof(struct ata_channel));
 556
 557     /* find channel number on this controller */
 558     device_get_children(device_get_parent(dev), &children, &count);
 559     for (i = 0; i < count; i++) {
 560         if (children[i] == dev)
 561             ch->unit = i;
 562     }
 563     kfree(children, M_TEMP);
 564
 565     ksprintf(buffer, "ATA channel %d", ch->unit);
 566     device_set_desc_copy(dev, buffer);
 567
 568     return ata_probe(dev);
 569 }
 570
 571 static int
 572 ata_pcichannel_attach(device_t dev)
 573 {
 574     struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
 575     struct ata_channel *ch = device_get_softc(dev);
 576     int error;
 577
 578     if (ctlr->dmainit)
 579         ctlr->dmainit(dev);
 580     if (ch->dma)
 581         ch->dma->alloc(dev);
 582
 583     if ((error = ctlr->allocate(dev))) {
 584         if (ch->dma)
 585             ch->dma->free(dev);
 586         return error;
 587     }
 588
 589     return ata_attach(dev);
 590 }
 591
 592 static int
 593 ata_pcichannel_detach(device_t dev)
 594 {
 595     struct ata_channel *ch = device_get_softc(dev);
 596     int error;
 597
 598     if ((error = ata_detach(dev)))
 599         return error;
 600
 601     if (ch->dma)
 602         ch->dma->free(dev);
 603
 604     /* XXX SOS free resources for io and ctlio ?? */
 605
 606     return 0;
 607 }
 608
 609 static int
 610 ata_pcichannel_locking(device_t dev, int mode)
 611 {
 612     struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
 613     struct ata_channel *ch = device_get_softc(dev);
 614
 615     if (ctlr->locking)
 616         return ctlr->locking(dev, mode);
 617     else
 618         return ch->unit;
 619 }
 620
 621 static void
 622 ata_pcichannel_reset(device_t dev)
 623 {
 624     struct ata_pci_controller *ctlr = device_get_softc(device_get_parent(dev));
 625     struct ata_channel *ch = device_get_softc(dev);
 626
 627     /* if DMA engine present reset it  */
 628     if (ch->dma) {
 629         if (ch->dma->reset)
 630             ch->dma->reset(dev);
 631         ch->dma->unload(dev);
 632     }
 633
 634     /* reset the controller HW */
 635     if (ctlr->reset)
 636         ctlr->reset(dev);
 637     else
 638         ata_generic_reset(dev);
 639 }
 640
 641 static void
 642 ata_pcichannel_setmode(device_t parent, device_t dev)
 643 {
 644     struct ata_pci_controller *ctlr = device_get_softc(GRANDPARENT(dev));
 645     struct ata_device *atadev = device_get_softc(dev);
 646     int mode = atadev->mode;
 647
 648     ctlr->setmode(dev, ATA_PIO_MAX);
 649     if (mode >= ATA_DMA)
 650         ctlr->setmode(dev, mode);
 651 }
 652
 653 static device_method_t ata_pcichannel_methods[] = {
 654     /* device interface */
 655     DEVMETHOD(device_probe,     ata_pcichannel_probe),
 656     DEVMETHOD(device_attach,    ata_pcichannel_attach),
 657     DEVMETHOD(device_detach,    ata_pcichannel_detach),
 658     DEVMETHOD(device_shutdown,  bus_generic_shutdown),
 659     DEVMETHOD(device_suspend,   ata_suspend),
 660     DEVMETHOD(device_resume,    ata_resume),
 661
 662     /* ATA methods */
 663     DEVMETHOD(ata_setmode,      ata_pcichannel_setmode),
 664     DEVMETHOD(ata_locking,      ata_pcichannel_locking),
 665     DEVMETHOD(ata_reset,        ata_pcichannel_reset),
 666
 667     { 0, 0 }
 668 };
 669
 670 driver_t ata_pcichannel_driver = {
 671     "ata",
 672     ata_pcichannel_methods,
 673     sizeof(struct ata_channel),
 674 };
 675
 676 DRIVER_MODULE(ata, atapci, ata_pcichannel_driver, ata_devclass, 0, 0);