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