git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/aic7xxx/aic79xx_pci.c

   1 /*
   2  * Product specific probe and attach routines for:
   3  *      aic7901 and aic7902 SCSI controllers
   4  *
   5  * Copyright (c) 1994-2001 Justin T. Gibbs.
   6  * Copyright (c) 2000-2002 Adaptec Inc.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions, and the following disclaimer,
  14  *    without modification.
  15  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  16  *    substantially similar to the "NO WARRANTY" disclaimer below
  17  *    ("Disclaimer") and any redistribution must be conditioned upon
  18  *    including a substantially similar Disclaimer requirement for further
  19  *    binary redistribution.
  20  * 3. Neither the names of the above-listed copyright holders nor the names
  21  *    of any contributors may be used to endorse or promote products derived
  22  *    from this software without specific prior written permission.
  23  *
  24  * Alternatively, this software may be distributed under the terms of the
  25  * GNU General Public License ("GPL") version 2 as published by the Free
  26  * Software Foundation.
  27  *
  28  * NO WARRANTY
  29  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  30  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  31  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  32  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  33  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  37  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  38  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  39  * POSSIBILITY OF SUCH DAMAGES.
  40  *
  41  * $Id: //depot/aic7xxx/aic7xxx/aic79xx_pci.c#92 $
  42  */
  43
  44 #ifdef __linux__
  45 #include "aic79xx_osm.h"
  46 #include "aic79xx_inline.h"
  47 #else
  48 #include <dev/aic7xxx/aic79xx_osm.h>
  49 #include <dev/aic7xxx/aic79xx_inline.h>
  50 #endif
  51
  52 #include "aic79xx_pci.h"
  53
  54 static __inline uint64_t
  55 ahd_compose_id(u_int device, u_int vendor, u_int subdevice, u_int subvendor)
  56 {
  57         uint64_t id;
  58
  59         id = subvendor
  60            | (subdevice << 16)
  61            | ((uint64_t)vendor << 32)
  62            | ((uint64_t)device << 48);
  63
  64         return (id);
  65 }
  66
  67 #define ID_AIC7902_PCI_REV_A4           0x3
  68 #define ID_AIC7902_PCI_REV_B0           0x10
  69 #define SUBID_HP                        0x0E11
  70
  71 #define DEVID_9005_HOSTRAID(id) ((id) & 0x80)
  72
  73 #define DEVID_9005_TYPE(id) ((id) & 0xF)
  74 #define         DEVID_9005_TYPE_HBA             0x0     /* Standard Card */
  75 #define         DEVID_9005_TYPE_HBA_2EXT        0x1     /* 2 External Ports */
  76 #define         DEVID_9005_TYPE_IROC            0x8     /* Raid(0,1,10) Card */
  77 #define         DEVID_9005_TYPE_MB              0xF     /* On Motherboard */
  78
  79 #define DEVID_9005_MFUNC(id) ((id) & 0x10)
  80
  81 #define DEVID_9005_PACKETIZED(id) ((id) & 0x8000)
  82
  83 #define SUBID_9005_TYPE(id) ((id) & 0xF)
  84 #define         SUBID_9005_TYPE_HBA             0x0     /* Standard Card */
  85 #define         SUBID_9005_TYPE_MB              0xF     /* On Motherboard */
  86
  87 #define SUBID_9005_AUTOTERM(id) (((id) & 0x10) == 0)
  88
  89 #define SUBID_9005_LEGACYCONN_FUNC(id) ((id) & 0x20)
  90
  91 #define SUBID_9005_SEEPTYPE(id) ((id) & 0x0C0) >> 6)
  92 #define         SUBID_9005_SEEPTYPE_NONE        0x0
  93 #define         SUBID_9005_SEEPTYPE_4K          0x1
  94
  95 static ahd_device_setup_t ahd_aic7901_setup;
  96 static ahd_device_setup_t ahd_aic7901A_setup;
  97 static ahd_device_setup_t ahd_aic7902_setup;
  98 static ahd_device_setup_t ahd_aic790X_setup;
  99
 100 struct ahd_pci_identity ahd_pci_ident_table [] =
 101 {
 102         /* aic7901 based controllers */
 103         {
 104                 ID_AHA_29320A,
 105                 ID_ALL_MASK,
 106                 "Adaptec 29320A Ultra320 SCSI adapter",
 107                 ahd_aic7901_setup
 108         },
 109         {
 110                 ID_AHA_29320ALP,
 111                 ID_ALL_MASK,
 112                 "Adaptec 29320ALP Ultra320 SCSI adapter",
 113                 ahd_aic7901_setup
 114         },
 115         /* aic7901A based controllers */
 116         {
 117                 ID_AHA_29320LP,
 118                 ID_ALL_MASK,
 119                 "Adaptec 29320LP Ultra320 SCSI adapter",
 120                 ahd_aic7901A_setup
 121         },
 122         /* aic7902 based controllers */
 123         {
 124                 ID_AHA_29320,
 125                 ID_ALL_MASK,
 126                 "Adaptec 29320 Ultra320 SCSI adapter",
 127                 ahd_aic7902_setup
 128         },
 129         {
 130                 ID_AHA_29320B,
 131                 ID_ALL_MASK,
 132                 "Adaptec 29320B Ultra320 SCSI adapter",
 133                 ahd_aic7902_setup
 134         },
 135         {
 136                 ID_AHA_39320,
 137                 ID_ALL_MASK,
 138                 "Adaptec 39320 Ultra320 SCSI adapter",
 139                 ahd_aic7902_setup
 140         },
 141         {
 142                 ID_AHA_39320_B,
 143                 ID_ALL_MASK,
 144                 "Adaptec 39320 Ultra320 SCSI adapter",
 145                 ahd_aic7902_setup
 146         },
 147         {
 148                 ID_AHA_39320_B_DELL,
 149                 ID_ALL_MASK,
 150                 "Adaptec (Dell OEM) 39320 Ultra320 SCSI adapter",
 151                 ahd_aic7902_setup
 152         },
 153         {
 154                 ID_AHA_39320A,
 155                 ID_ALL_MASK,
 156                 "Adaptec 39320A Ultra320 SCSI adapter",
 157                 ahd_aic7902_setup
 158         },
 159         {
 160                 ID_AHA_39320D,
 161                 ID_ALL_MASK,
 162                 "Adaptec 39320D Ultra320 SCSI adapter",
 163                 ahd_aic7902_setup
 164         },
 165         {
 166                 ID_AHA_39320D_HP,
 167                 ID_ALL_MASK,
 168                 "Adaptec (HP OEM) 39320D Ultra320 SCSI adapter",
 169                 ahd_aic7902_setup
 170         },
 171         {
 172                 ID_AHA_39320D_B,
 173                 ID_ALL_MASK,
 174                 "Adaptec 39320D Ultra320 SCSI adapter",
 175                 ahd_aic7902_setup
 176         },
 177         {
 178                 ID_AHA_39320D_B_HP,
 179                 ID_ALL_MASK,
 180                 "Adaptec (HP OEM) 39320D Ultra320 SCSI adapter",
 181                 ahd_aic7902_setup
 182         },
 183         /* Generic chip probes for devices we don't know 'exactly' */
 184         {
 185                 ID_AIC7901 & ID_9005_GENERIC_MASK,
 186                 ID_9005_GENERIC_MASK,
 187                 "Adaptec AIC7901 Ultra320 SCSI adapter",
 188                 ahd_aic7901_setup
 189         },
 190         {
 191                 ID_AIC7901A & ID_DEV_VENDOR_MASK,
 192                 ID_DEV_VENDOR_MASK,
 193                 "Adaptec AIC7901A Ultra320 SCSI adapter",
 194                 ahd_aic7901A_setup
 195         },
 196         {
 197                 ID_AIC7902 & ID_9005_GENERIC_MASK,
 198                 ID_9005_GENERIC_MASK,
 199                 "Adaptec AIC7902 Ultra320 SCSI adapter",
 200                 ahd_aic7902_setup
 201         }
 202 };
 203
 204 const u_int ahd_num_pci_devs = NUM_ELEMENTS(ahd_pci_ident_table);
 205
 206 #define DEVCONFIG               0x40
 207 #define         PCIXINITPAT     0x0000E000ul
 208 #define                 PCIXINIT_PCI33_66       0x0000E000ul
 209 #define                 PCIXINIT_PCIX50_66      0x0000C000ul
 210 #define                 PCIXINIT_PCIX66_100     0x0000A000ul
 211 #define                 PCIXINIT_PCIX100_133    0x00008000ul
 212 #define PCI_BUS_MODES_INDEX(devconfig)  \
 213         (((devconfig) & PCIXINITPAT) >> 13)
 214 static const char *pci_bus_modes[] =
 215 {
 216         "PCI bus mode unknown",
 217         "PCI bus mode unknown",
 218         "PCI bus mode unknown",
 219         "PCI bus mode unknown",
 220         "PCI-X 101-133Mhz",
 221         "PCI-X 67-100Mhz",
 222         "PCI-X 50-66Mhz",
 223         "PCI 33 or 66Mhz"
 224 };
 225
 226 #define         TESTMODE        0x00000800ul
 227 #define         IRDY_RST        0x00000200ul
 228 #define         FRAME_RST       0x00000100ul
 229 #define         PCI64BIT        0x00000080ul
 230 #define         MRDCEN          0x00000040ul
 231 #define         ENDIANSEL       0x00000020ul
 232 #define         MIXQWENDIANEN   0x00000008ul
 233 #define         DACEN           0x00000004ul
 234 #define         STPWLEVEL       0x00000002ul
 235 #define         QWENDIANSEL     0x00000001ul
 236
 237 #define DEVCONFIG1              0x44
 238 #define         PREQDIS         0x01
 239
 240 #define CSIZE_LATTIME           0x0c
 241 #define         CACHESIZE       0x000000fful
 242 #define         LATTIME         0x0000ff00ul
 243
 244 static int      ahd_check_extport(struct ahd_softc *ahd);
 245 static void     ahd_configure_termination(struct ahd_softc *ahd,
 246                                           u_int adapter_control);
 247 static void     ahd_pci_split_intr(struct ahd_softc *ahd, u_int intstat);
 248
 249 struct ahd_pci_identity *
 250 ahd_find_pci_device(ahd_dev_softc_t pci)
 251 {
 252         uint64_t  full_id;
 253         uint16_t  device;
 254         uint16_t  vendor;
 255         uint16_t  subdevice;
 256         uint16_t  subvendor;
 257         struct    ahd_pci_identity *entry;
 258         u_int     i;
 259
 260         vendor = ahd_pci_read_config(pci, PCIR_DEVVENDOR, /*bytes*/2);
 261         device = ahd_pci_read_config(pci, PCIR_DEVICE, /*bytes*/2);
 262         subvendor = ahd_pci_read_config(pci, PCIR_SUBVEND_0, /*bytes*/2);
 263         subdevice = ahd_pci_read_config(pci, PCIR_SUBDEV_0, /*bytes*/2);
 264         full_id = ahd_compose_id(device,
 265                                  vendor,
 266                                  subdevice,
 267                                  subvendor);
 268
 269         /*
 270          * Controllers, mask out the IROC/HostRAID bit
 271          */
 272
 273         full_id &= ID_ALL_IROC_MASK;
 274
 275         for (i = 0; i < ahd_num_pci_devs; i++) {
 276                 entry = &ahd_pci_ident_table[i];
 277                 if (entry->full_id == (full_id & entry->id_mask)) {
 278                         /* Honor exclusion entries. */
 279                         if (entry->name == NULL)
 280                                 return (NULL);
 281                         return (entry);
 282                 }
 283         }
 284         return (NULL);
 285 }
 286
 287 int
 288 ahd_pci_config(struct ahd_softc *ahd, struct ahd_pci_identity *entry)
 289 {
 290         struct scb_data *shared_scb_data;
 291         u_int            command;
 292         uint32_t         devconfig;
 293         uint16_t         subvendor;
 294         int              error;
 295
 296         shared_scb_data = NULL;
 297         ahd->description = entry->name;
 298         /*
 299          * Record if this is an HP board.
 300          */
 301         subvendor = ahd_pci_read_config(ahd->dev_softc,
 302                                         PCIR_SUBVEND_0, /*bytes*/2);
 303         if (subvendor == SUBID_HP)
 304                 ahd->flags |= AHD_HP_BOARD;
 305
 306         error = entry->setup(ahd);
 307         if (error != 0)
 308                 return (error);
 309
 310         devconfig = ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
 311         if ((devconfig & PCIXINITPAT) == PCIXINIT_PCI33_66) {
 312                 ahd->chip |= AHD_PCI;
 313                 /* Disable PCIX workarounds when running in PCI mode. */
 314                 ahd->bugs &= ~AHD_PCIX_BUG_MASK;
 315         } else {
 316                 ahd->chip |= AHD_PCIX;
 317         }
 318         ahd->bus_description = pci_bus_modes[PCI_BUS_MODES_INDEX(devconfig)];
 319
 320         ahd_power_state_change(ahd, AHD_POWER_STATE_D0);
 321
 322         error = ahd_pci_map_registers(ahd);
 323         if (error != 0)
 324                 return (error);
 325
 326         /*
 327          * If we need to support high memory, enable dual
 328          * address cycles.  This bit must be set to enable
 329          * high address bit generation even if we are on a
 330          * 64bit bus (PCI64BIT set in devconfig).
 331          */
 332         if ((ahd->flags & (AHD_39BIT_ADDRESSING|AHD_64BIT_ADDRESSING)) != 0) {
 333                 uint32_t devconfig;
 334
 335                 if (bootverbose)
 336                         printf("%s: Enabling 39Bit Addressing\n",
 337                                ahd_name(ahd));
 338                 devconfig = ahd_pci_read_config(ahd->dev_softc,
 339                                                 DEVCONFIG, /*bytes*/4);
 340                 devconfig |= DACEN;
 341                 ahd_pci_write_config(ahd->dev_softc, DEVCONFIG,
 342                                      devconfig, /*bytes*/4);
 343         }
 344
 345         /* Ensure busmastering is enabled */
 346         command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/2);
 347         command |= PCIM_CMD_BUSMASTEREN;
 348         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, /*bytes*/2);
 349
 350         error = ahd_softc_init(ahd);
 351         if (error != 0)
 352                 return (error);
 353
 354         ahd->bus_intr = ahd_pci_intr;
 355
 356         error = ahd_reset(ahd, /*reinit*/FALSE);
 357         if (error != 0)
 358                 return (ENXIO);
 359
 360         ahd->pci_cachesize =
 361             ahd_pci_read_config(ahd->dev_softc, CSIZE_LATTIME,
 362                                 /*bytes*/1) & CACHESIZE;
 363         ahd->pci_cachesize *= 4;
 364
 365         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
 366         /* See if we have a SEEPROM and perform auto-term */
 367         error = ahd_check_extport(ahd);
 368         if (error != 0)
 369                 return (error);
 370
 371         /* Core initialization */
 372         error = ahd_init(ahd);
 373         if (error != 0)
 374                 return (error);
 375
 376         /*
 377          * Allow interrupts now that we are completely setup.
 378          */
 379         error = ahd_pci_map_int(ahd);
 380         if (!error)
 381                 ahd->init_level++;
 382         return error;
 383 }
 384
 385 /*
 386  * Perform some simple tests that should catch situations where
 387  * our registers are invalidly mapped.
 388  */
 389 int
 390 ahd_pci_test_register_access(struct ahd_softc *ahd)
 391 {
 392         uint32_t cmd;
 393         u_int    targpcistat;
 394         u_int    pci_status1;
 395         int      error;
 396         uint8_t  hcntrl;
 397
 398         error = EIO;
 399
 400         /*
 401          * Enable PCI error interrupt status, but suppress NMIs
 402          * generated by SERR raised due to target aborts.
 403          */
 404         cmd = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/2);
 405         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
 406                              cmd & ~PCIM_CMD_SERRESPEN, /*bytes*/2);
 407
 408         /*
 409          * First a simple test to see if any
 410          * registers can be read.  Reading
 411          * HCNTRL has no side effects and has
 412          * at least one bit that is guaranteed to
 413          * be zero so it is a good register to
 414          * use for this test.
 415          */
 416         hcntrl = ahd_inb(ahd, HCNTRL);
 417         if (hcntrl == 0xFF)
 418                 goto fail;
 419
 420         /*
 421          * Next create a situation where write combining
 422          * or read prefetching could be initiated by the
 423          * CPU or host bridge.  Our device does not support
 424          * either, so look for data corruption and/or flaged
 425          * PCI errors.  First pause without causing another
 426          * chip reset.
 427          */
 428         hcntrl &= ~CHIPRST;
 429         ahd_outb(ahd, HCNTRL, hcntrl|PAUSE);
 430         while (ahd_is_paused(ahd) == 0)
 431                 ;
 432
 433         /* Clear any PCI errors that occurred before our driver attached. */
 434         ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 435         targpcistat = ahd_inb(ahd, TARGPCISTAT);
 436         ahd_outb(ahd, TARGPCISTAT, targpcistat);
 437         pci_status1 = ahd_pci_read_config(ahd->dev_softc,
 438                                           PCIR_STATUS + 1, /*bytes*/1);
 439         ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
 440                              pci_status1, /*bytes*/1);
 441         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
 442         ahd_outb(ahd, CLRINT, CLRPCIINT);
 443
 444         ahd_outb(ahd, SEQCTL0, PERRORDIS);
 445         ahd_outl(ahd, SRAM_BASE, 0x5aa555aa);
 446         if (ahd_inl(ahd, SRAM_BASE) != 0x5aa555aa)
 447                 goto fail;
 448
 449         if ((ahd_inb(ahd, INTSTAT) & PCIINT) != 0) {
 450                 u_int targpcistat;
 451
 452                 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 453                 targpcistat = ahd_inb(ahd, TARGPCISTAT);
 454                 if ((targpcistat & STA) != 0)
 455                         goto fail;
 456         }
 457
 458         error = 0;
 459
 460 fail:
 461         if ((ahd_inb(ahd, INTSTAT) & PCIINT) != 0) {
 462
 463                 ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 464                 targpcistat = ahd_inb(ahd, TARGPCISTAT);
 465
 466                 /* Silently clear any latched errors. */
 467                 ahd_outb(ahd, TARGPCISTAT, targpcistat);
 468                 pci_status1 = ahd_pci_read_config(ahd->dev_softc,
 469                                                   PCIR_STATUS + 1, /*bytes*/1);
 470                 ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
 471                                      pci_status1, /*bytes*/1);
 472                 ahd_outb(ahd, CLRINT, CLRPCIINT);
 473         }
 474         ahd_outb(ahd, SEQCTL0, PERRORDIS|FAILDIS);
 475         ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, cmd, /*bytes*/2);
 476         return (error);
 477 }
 478
 479 /*
 480  * Check the external port logic for a serial eeprom
 481  * and termination/cable detection contrls.
 482  */
 483 static int
 484 ahd_check_extport(struct ahd_softc *ahd)
 485 {
 486         struct  vpd_config vpd;
 487         struct  seeprom_config *sc;
 488         u_int   adapter_control;
 489         int     have_seeprom;
 490         int     error;
 491
 492         sc = ahd->seep_config;
 493         have_seeprom = ahd_acquire_seeprom(ahd);
 494         if (have_seeprom) {
 495                 u_int start_addr;
 496
 497                 /*
 498                  * Fetch VPD for this function and parse it.
 499                  */
 500                 if (bootverbose)
 501                         printf("%s: Reading VPD from SEEPROM...",
 502                                ahd_name(ahd));
 503
 504                 /* Address is always in units of 16bit words */
 505                 start_addr = ((2 * sizeof(*sc))
 506                             + (sizeof(vpd) * (ahd->channel - 'A'))) / 2;
 507
 508                 error = ahd_read_seeprom(ahd, (uint16_t *)&vpd,
 509                                          start_addr, sizeof(vpd)/2,
 510                                          /*bytestream*/TRUE);
 511                 if (error == 0)
 512                         error = ahd_parse_vpddata(ahd, &vpd);
 513                 if (bootverbose)
 514                         printf("%s: VPD parsing %s\n",
 515                                ahd_name(ahd),
 516                                error == 0 ? "successful" : "failed");
 517
 518                 if (bootverbose)
 519                         printf("%s: Reading SEEPROM...", ahd_name(ahd));
 520
 521                 /* Address is always in units of 16bit words */
 522                 start_addr = (sizeof(*sc) / 2) * (ahd->channel - 'A');
 523
 524                 error = ahd_read_seeprom(ahd, (uint16_t *)sc,
 525                                          start_addr, sizeof(*sc)/2,
 526                                          /*bytestream*/FALSE);
 527
 528                 if (error != 0) {
 529                         printf("Unable to read SEEPROM\n");
 530                         have_seeprom = 0;
 531                 } else {
 532                         have_seeprom = ahd_verify_cksum(sc);
 533
 534                         if (bootverbose) {
 535                                 if (have_seeprom == 0)
 536                                         printf ("checksum error\n");
 537                                 else
 538                                         printf ("done.\n");
 539                         }
 540                 }
 541                 ahd_release_seeprom(ahd);
 542         }
 543
 544         if (!have_seeprom) {
 545                 u_int     nvram_scb;
 546
 547                 /*
 548                  * Pull scratch ram settings and treat them as
 549                  * if they are the contents of an seeprom if
 550                  * the 'ADPT', 'BIOS', or 'ASPI' signature is found
 551                  * in SCB 0xFF.  We manually compose the data as 16bit
 552                  * values to avoid endian issues.
 553                  */
 554                 ahd_set_scbptr(ahd, 0xFF);
 555                 nvram_scb = ahd_inb_scbram(ahd, SCB_BASE + NVRAM_SCB_OFFSET);
 556                 if (nvram_scb != 0xFF
 557                  && ((ahd_inb_scbram(ahd, SCB_BASE + 0) == 'A'
 558                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'D'
 559                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'P'
 560                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'T')
 561                   || (ahd_inb_scbram(ahd, SCB_BASE + 0) == 'B'
 562                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'I'
 563                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'O'
 564                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'S')
 565                   || (ahd_inb_scbram(ahd, SCB_BASE + 0) == 'A'
 566                    && ahd_inb_scbram(ahd, SCB_BASE + 1) == 'S'
 567                    && ahd_inb_scbram(ahd, SCB_BASE + 2) == 'P'
 568                    && ahd_inb_scbram(ahd, SCB_BASE + 3) == 'I'))) {
 569                         uint16_t *sc_data;
 570                         int       i;
 571
 572                         ahd_set_scbptr(ahd, nvram_scb);
 573                         sc_data = (uint16_t *)sc;
 574                         for (i = 0; i < 64; i += 2)
 575                                 *sc_data++ = ahd_inw_scbram(ahd, SCB_BASE+i);
 576                         have_seeprom = ahd_verify_cksum(sc);
 577                         if (have_seeprom)
 578                                 ahd->flags |= AHD_SCB_CONFIG_USED;
 579                 }
 580         }
 581
 582 #ifdef AHD_DEBUG
 583         if (have_seeprom != 0
 584          && (ahd_debug & AHD_DUMP_SEEPROM) != 0) {
 585                 uint16_t *sc_data;
 586                 int       i;
 587
 588                 printf("%s: Seeprom Contents:", ahd_name(ahd));
 589                 sc_data = (uint16_t *)sc;
 590                 for (i = 0; i < (sizeof(*sc)); i += 2)
 591                         printf("\n\t0x%.4x", sc_data[i]);
 592                 printf("\n");
 593         }
 594 #endif
 595
 596         if (!have_seeprom) {
 597                 if (bootverbose)
 598                         printf("%s: No SEEPROM available.\n", ahd_name(ahd));
 599                 ahd->flags |= AHD_USEDEFAULTS;
 600                 error = ahd_default_config(ahd);
 601                 adapter_control = CFAUTOTERM|CFSEAUTOTERM;
 602                 free(ahd->seep_config, M_DEVBUF);
 603                 ahd->seep_config = NULL;
 604         } else {
 605                 error = ahd_parse_cfgdata(ahd, sc);
 606                 adapter_control = sc->adapter_control;
 607         }
 608         if (error != 0)
 609                 return (error);
 610
 611         ahd_configure_termination(ahd, adapter_control);
 612
 613         return (0);
 614 }
 615
 616 static void
 617 ahd_configure_termination(struct ahd_softc *ahd, u_int adapter_control)
 618 {
 619         int      error;
 620         u_int    sxfrctl1;
 621         uint8_t  termctl;
 622         uint32_t devconfig;
 623
 624         devconfig = ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
 625         devconfig &= ~STPWLEVEL;
 626         if ((ahd->flags & AHD_STPWLEVEL_A) != 0)
 627                 devconfig |= STPWLEVEL;
 628         if (bootverbose)
 629                 printf("%s: STPWLEVEL is %s\n",
 630                        ahd_name(ahd), (devconfig & STPWLEVEL) ? "on" : "off");
 631         ahd_pci_write_config(ahd->dev_softc, DEVCONFIG, devconfig, /*bytes*/4);
 632
 633         /* Make sure current sensing is off. */
 634         if ((ahd->flags & AHD_CURRENT_SENSING) != 0) {
 635                 (void)ahd_write_flexport(ahd, FLXADDR_ROMSTAT_CURSENSECTL, 0);
 636         }
 637
 638         /*
 639          * Read to sense.  Write to set.
 640          */
 641         error = ahd_read_flexport(ahd, FLXADDR_TERMCTL, &termctl);
 642         if ((adapter_control & CFAUTOTERM) == 0) {
 643                 if (bootverbose)
 644                         printf("%s: Manual Primary Termination\n",
 645                                ahd_name(ahd));
 646                 termctl &= ~(FLX_TERMCTL_ENPRILOW|FLX_TERMCTL_ENPRIHIGH);
 647                 if ((adapter_control & CFSTERM) != 0)
 648                         termctl |= FLX_TERMCTL_ENPRILOW;
 649                 if ((adapter_control & CFWSTERM) != 0)
 650                         termctl |= FLX_TERMCTL_ENPRIHIGH;
 651         } else if (error != 0) {
 652                 printf("%s: Primary Auto-Term Sensing failed! "
 653                        "Using Defaults.\n", ahd_name(ahd));
 654                 termctl = FLX_TERMCTL_ENPRILOW|FLX_TERMCTL_ENPRIHIGH;
 655         }
 656
 657         if ((adapter_control & CFSEAUTOTERM) == 0) {
 658                 if (bootverbose)
 659                         printf("%s: Manual Secondary Termination\n",
 660                                ahd_name(ahd));
 661                 termctl &= ~(FLX_TERMCTL_ENSECLOW|FLX_TERMCTL_ENSECHIGH);
 662                 if ((adapter_control & CFSELOWTERM) != 0)
 663                         termctl |= FLX_TERMCTL_ENSECLOW;
 664                 if ((adapter_control & CFSEHIGHTERM) != 0)
 665                         termctl |= FLX_TERMCTL_ENSECHIGH;
 666         } else if (error != 0) {
 667                 printf("%s: Secondary Auto-Term Sensing failed! "
 668                        "Using Defaults.\n", ahd_name(ahd));
 669                 termctl |= FLX_TERMCTL_ENSECLOW|FLX_TERMCTL_ENSECHIGH;
 670         }
 671
 672         /*
 673          * Now set the termination based on what we found.
 674          */
 675         sxfrctl1 = ahd_inb(ahd, SXFRCTL1) & ~STPWEN;
 676         ahd->flags &= ~AHD_TERM_ENB_A;
 677         if ((termctl & FLX_TERMCTL_ENPRILOW) != 0) {
 678                 ahd->flags |= AHD_TERM_ENB_A;
 679                 sxfrctl1 |= STPWEN;
 680         }
 681         /* Must set the latch once in order to be effective. */
 682         ahd_outb(ahd, SXFRCTL1, sxfrctl1|STPWEN);
 683         ahd_outb(ahd, SXFRCTL1, sxfrctl1);
 684
 685         error = ahd_write_flexport(ahd, FLXADDR_TERMCTL, termctl);
 686         if (error != 0) {
 687                 printf("%s: Unable to set termination settings!\n",
 688                        ahd_name(ahd));
 689         } else if (bootverbose) {
 690                 printf("%s: Primary High byte termination %sabled\n",
 691                        ahd_name(ahd),
 692                        (termctl & FLX_TERMCTL_ENPRIHIGH) ? "En" : "Dis");
 693
 694                 printf("%s: Primary Low byte termination %sabled\n",
 695                        ahd_name(ahd),
 696                        (termctl & FLX_TERMCTL_ENPRILOW) ? "En" : "Dis");
 697
 698                 printf("%s: Secondary High byte termination %sabled\n",
 699                        ahd_name(ahd),
 700                        (termctl & FLX_TERMCTL_ENSECHIGH) ? "En" : "Dis");
 701
 702                 printf("%s: Secondary Low byte termination %sabled\n",
 703                        ahd_name(ahd),
 704                        (termctl & FLX_TERMCTL_ENSECLOW) ? "En" : "Dis");
 705         }
 706         return;
 707 }
 708
 709 #define DPE     0x80
 710 #define SSE     0x40
 711 #define RMA     0x20
 712 #define RTA     0x10
 713 #define STA     0x08
 714 #define DPR     0x01
 715
 716 static const char *split_status_source[] =
 717 {
 718         "DFF0",
 719         "DFF1",
 720         "OVLY",
 721         "CMC",
 722 };
 723
 724 static const char *pci_status_source[] =
 725 {
 726         "DFF0",
 727         "DFF1",
 728         "SG",
 729         "CMC",
 730         "OVLY",
 731         "NONE",
 732         "MSI",
 733         "TARG"
 734 };
 735
 736 static const char *split_status_strings[] =
 737 {
 738         "%s: Received split response in %s.\n",
 739         "%s: Received split completion error message in %s\n",
 740         "%s: Receive overrun in %s\n",
 741         "%s: Count not complete in %s\n",
 742         "%s: Split completion data bucket in %s\n",
 743         "%s: Split completion address error in %s\n",
 744         "%s: Split completion byte count error in %s\n",
 745         "%s: Signaled Target-abort to early terminate a split in %s\n"
 746 };
 747
 748 static const char *pci_status_strings[] =
 749 {
 750         "%s: Data Parity Error has been reported via PERR# in %s\n",
 751         "%s: Target initial wait state error in %s\n",
 752         "%s: Split completion read data parity error in %s\n",
 753         "%s: Split completion address attribute parity error in %s\n",
 754         "%s: Received a Target Abort in %s\n",
 755         "%s: Received a Master Abort in %s\n",
 756         "%s: Signal System Error Detected in %s\n",
 757         "%s: Address or Write Phase Parity Error Detected in %s.\n"
 758 };
 759
 760 void
 761 ahd_pci_intr(struct ahd_softc *ahd)
 762 {
 763         uint8_t         pci_status[8];
 764         ahd_mode_state  saved_modes;
 765         u_int           pci_status1;
 766         u_int           intstat;
 767         u_int           i;
 768         u_int           reg;
 769
 770         intstat = ahd_inb(ahd, INTSTAT);
 771
 772         if ((intstat & SPLTINT) != 0)
 773                 ahd_pci_split_intr(ahd, intstat);
 774
 775         if ((intstat & PCIINT) == 0)
 776                 return;
 777
 778         printf("%s: PCI error Interrupt\n", ahd_name(ahd));
 779         saved_modes = ahd_save_modes(ahd);
 780         ahd_dump_card_state(ahd);
 781         ahd_set_modes(ahd, AHD_MODE_CFG, AHD_MODE_CFG);
 782         for (i = 0, reg = DF0PCISTAT; i < 8; i++, reg++) {
 783
 784                 if (i == 5)
 785                         continue;
 786                 pci_status[i] = ahd_inb(ahd, reg);
 787                 /* Clear latched errors.  So our interrupt deasserts. */
 788                 ahd_outb(ahd, reg, pci_status[i]);
 789         }
 790
 791         for (i = 0; i < 8; i++) {
 792                 u_int bit;
 793
 794                 if (i == 5)
 795                         continue;
 796
 797                 for (bit = 0; bit < 8; bit++) {
 798
 799                         if ((pci_status[i] & (0x1 << bit)) != 0) {
 800                                 static const char *s;
 801
 802                                 s = pci_status_strings[bit];
 803                                 if (i == 7/*TARG*/ && bit == 3)
 804                                         s = "%s: Signaled Target Abort\n";
 805                                 printf(s, ahd_name(ahd), pci_status_source[i]);
 806                         }
 807                 }
 808         }
 809         pci_status1 = ahd_pci_read_config(ahd->dev_softc,
 810                                           PCIR_STATUS + 1, /*bytes*/1);
 811         ahd_pci_write_config(ahd->dev_softc, PCIR_STATUS + 1,
 812                              pci_status1, /*bytes*/1);
 813         ahd_restore_modes(ahd, saved_modes);
 814         ahd_outb(ahd, CLRINT, CLRPCIINT);
 815         ahd_unpause(ahd);
 816 }
 817
 818 static void
 819 ahd_pci_split_intr(struct ahd_softc *ahd, u_int intstat)
 820 {
 821         uint8_t         split_status[4];
 822         uint8_t         split_status1[4];
 823         uint8_t         sg_split_status[2];
 824         uint8_t         sg_split_status1[2];
 825         ahd_mode_state  saved_modes;
 826         u_int           i;
 827         uint16_t        pcix_status;
 828
 829         /*
 830          * Check for splits in all modes.  Modes 0 and 1
 831          * additionally have SG engine splits to look at.
 832          */
 833         pcix_status = ahd_pci_read_config(ahd->dev_softc, PCIXR_STATUS,
 834                                           /*bytes*/2);
 835         printf("%s: PCI Split Interrupt - PCI-X status = 0x%x\n",
 836                ahd_name(ahd), pcix_status);
 837         saved_modes = ahd_save_modes(ahd);
 838         for (i = 0; i < 4; i++) {
 839                 ahd_set_modes(ahd, i, i);
 840
 841                 split_status[i] = ahd_inb(ahd, DCHSPLTSTAT0);
 842                 split_status1[i] = ahd_inb(ahd, DCHSPLTSTAT1);
 843                 /* Clear latched errors.  So our interrupt deasserts. */
 844                 ahd_outb(ahd, DCHSPLTSTAT0, split_status[i]);
 845                 ahd_outb(ahd, DCHSPLTSTAT1, split_status1[i]);
 846                 if (i > 1)
 847                         continue;
 848                 sg_split_status[i] = ahd_inb(ahd, SGSPLTSTAT0);
 849                 sg_split_status1[i] = ahd_inb(ahd, SGSPLTSTAT1);
 850                 /* Clear latched errors.  So our interrupt deasserts. */
 851                 ahd_outb(ahd, SGSPLTSTAT0, sg_split_status[i]);
 852                 ahd_outb(ahd, SGSPLTSTAT1, sg_split_status1[i]);
 853         }
 854
 855         for (i = 0; i < 4; i++) {
 856                 u_int bit;
 857
 858                 for (bit = 0; bit < 8; bit++) {
 859
 860                         if ((split_status[i] & (0x1 << bit)) != 0) {
 861                                 static const char *s;
 862
 863                                 s = split_status_strings[bit];
 864                                 printf(s, ahd_name(ahd),
 865                                        split_status_source[i]);
 866                         }
 867
 868                         if (i > 1)
 869                                 continue;
 870
 871                         if ((sg_split_status[i] & (0x1 << bit)) != 0) {
 872                                 static const char *s;
 873
 874                                 s = split_status_strings[bit];
 875                                 printf(s, ahd_name(ahd), "SG");
 876                         }
 877                 }
 878         }
 879         /*
 880          * Clear PCI-X status bits.
 881          */
 882         ahd_pci_write_config(ahd->dev_softc, PCIXR_STATUS,
 883                              pcix_status, /*bytes*/2);
 884         ahd_outb(ahd, CLRINT, CLRSPLTINT);
 885         ahd_restore_modes(ahd, saved_modes);
 886 }
 887
 888 static int
 889 ahd_aic7901_setup(struct ahd_softc *ahd)
 890 {
 891
 892         ahd->chip = AHD_AIC7901;
 893         ahd->features = AHD_AIC7901_FE;
 894         return (ahd_aic790X_setup(ahd));
 895 }
 896
 897 static int
 898 ahd_aic7901A_setup(struct ahd_softc *ahd)
 899 {
 900
 901         ahd->chip = AHD_AIC7901A;
 902         ahd->features = AHD_AIC7901A_FE;
 903         return (ahd_aic790X_setup(ahd));
 904 }
 905
 906 static int
 907 ahd_aic7902_setup(struct ahd_softc *ahd)
 908 {
 909         ahd->chip = AHD_AIC7902;
 910         ahd->features = AHD_AIC7902_FE;
 911         return (ahd_aic790X_setup(ahd));
 912 }
 913
 914 static int
 915 ahd_aic790X_setup(struct ahd_softc *ahd)
 916 {
 917         ahd_dev_softc_t pci;
 918         u_int rev;
 919
 920         pci = ahd->dev_softc;
 921         rev = ahd_pci_read_config(pci, PCIR_REVID, /*bytes*/1);
 922         if (rev < ID_AIC7902_PCI_REV_A4) {
 923                 printf("%s: Unable to attach to unsupported chip revision %d\n",
 924                        ahd_name(ahd), rev);
 925                 ahd_pci_write_config(pci, PCIR_COMMAND, 0, /*bytes*/2);
 926                 return (ENXIO);
 927         }
 928         ahd->channel = ahd_get_pci_function(pci) + 'A';
 929         if (rev < ID_AIC7902_PCI_REV_B0) {
 930                 /*
 931                  * Enable A series workarounds.
 932                  */
 933                 ahd->bugs |= AHD_SENT_SCB_UPDATE_BUG|AHD_ABORT_LQI_BUG
 934                           |  AHD_PKT_BITBUCKET_BUG|AHD_LONG_SETIMO_BUG
 935                           |  AHD_NLQICRC_DELAYED_BUG|AHD_SCSIRST_BUG
 936                           |  AHD_LQO_ATNO_BUG|AHD_AUTOFLUSH_BUG
 937                           |  AHD_CLRLQO_AUTOCLR_BUG|AHD_PCIX_MMAPIO_BUG
 938                           |  AHD_PCIX_CHIPRST_BUG|AHD_PCIX_SCBRAM_RD_BUG
 939                           |  AHD_PKTIZED_STATUS_BUG|AHD_PKT_LUN_BUG
 940                           |  AHD_MDFF_WSCBPTR_BUG|AHD_REG_SLOW_SETTLE_BUG
 941                           |  AHD_SET_MODE_BUG|AHD_BUSFREEREV_BUG
 942                           |  AHD_NONPACKFIFO_BUG|AHD_PACED_NEGTABLE_BUG
 943                           |  AHD_FAINT_LED_BUG;
 944
 945                 /*
 946                  * IO Cell paramter setup.
 947                  */
 948                 AHD_SET_PRECOMP(ahd, AHD_PRECOMP_CUTBACK_29);
 949
 950                 if ((ahd->flags & AHD_HP_BOARD) == 0)
 951                         AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVA);
 952         } else {
 953                 /* This is revision B and newer. */
 954                 extern uint32_t aic79xx_slowcrc;
 955                 u_int devconfig1;
 956
 957                 ahd->features |= AHD_RTI|AHD_NEW_IOCELL_OPTS
 958                               |  AHD_NEW_DFCNTRL_OPTS|AHD_FAST_CDB_DELIVERY
 959                               |  AHD_BUSFREEREV_BUG;
 960                 ahd->bugs |= AHD_LQOOVERRUN_BUG|AHD_EARLY_REQ_BUG;
 961
 962                 /* If the user requested the the SLOWCRC bit to be set. */
 963                 if (aic79xx_slowcrc)
 964                         ahd->features |= AHD_AIC79XXB_SLOWCRC;
 965
 966                 /*
 967                  * Some issues have been resolved in the 7901B.
 968                  */
 969                 if ((ahd->features & AHD_MULTI_FUNC) != 0)
 970                         ahd->bugs |= AHD_INTCOLLISION_BUG|AHD_ABORT_LQI_BUG;
 971
 972                 /*
 973                  * IO Cell paramter setup.
 974                  */
 975                 AHD_SET_PRECOMP(ahd, AHD_PRECOMP_CUTBACK_29);
 976                 AHD_SET_SLEWRATE(ahd, AHD_SLEWRATE_DEF_REVB);
 977                 AHD_SET_AMPLITUDE(ahd, AHD_AMPLITUDE_DEF);
 978
 979                 /*
 980                  * Set the PREQDIS bit for H2B which disables some workaround
 981                  * that doesn't work on regular PCI busses.
 982                  * XXX - Find out exactly what this does from the hardware
 983                  *       folks!
 984                  */
 985                 devconfig1 = ahd_pci_read_config(pci, DEVCONFIG1, /*bytes*/1);
 986                 ahd_pci_write_config(pci, DEVCONFIG1,
 987                                      devconfig1|PREQDIS, /*bytes*/1);
 988                 devconfig1 = ahd_pci_read_config(pci, DEVCONFIG1, /*bytes*/1);
 989         }
 990
 991         return (0);
 992 }