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      1 /*
      2  * Product specific probe and attach routines for:
      3  *      3940, 2940, aic7895, aic7890, aic7880,
      4  *	aic7870, aic7860 and aic7850 SCSI controllers
      5  *
      6  * Copyright (c) 1994-2001 Justin T. Gibbs.
      7  * Copyright (c) 2000-2001 Adaptec Inc.
      8  * All rights reserved.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions, and the following disclaimer,
     15  *    without modification.
     16  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
     17  *    substantially similar to the "NO WARRANTY" disclaimer below
     18  *    ("Disclaimer") and any redistribution must be conditioned upon
     19  *    including a substantially similar Disclaimer requirement for further
     20  *    binary redistribution.
     21  * 3. Neither the names of the above-listed copyright holders nor the names
     22  *    of any contributors may be used to endorse or promote products derived
     23  *    from this software without specific prior written permission.
     24  *
     25  * Alternatively, this software may be distributed under the terms of the
     26  * GNU General Public License ("GPL") version 2 as published by the Free
     27  * Software Foundation.
     28  *
     29  * NO WARRANTY
     30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     31  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     32  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
     33  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     34  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     35  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     36  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     37  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     38  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     39  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     40  * POSSIBILITY OF SUCH DAMAGES.
     41  *
     42  * $Id: ahc_pci.c,v 1.76 2025/06/27 21:36:22 andvar Exp $
     43  *
     44  * //depot/aic7xxx/aic7xxx/aic7xxx_pci.c#57 $
     45  *
     46  * $FreeBSD: /repoman/r/ncvs/src/sys/dev/aic7xxx/aic7xxx_pci.c,v 1.22 2003/01/20 20:44:55 gibbs Exp $
     47  */
     48 /*
     49  * Ported from FreeBSD by Pascal Renauld, Network Storage Solutions, Inc. - April 2003
     50  */
     51 
     52 #include <sys/cdefs.h>
     53 __KERNEL_RCSID(0, "$NetBSD: ahc_pci.c,v 1.76 2025/06/27 21:36:22 andvar Exp $");
     54 
     55 #include <sys/param.h>
     56 #include <sys/systm.h>
     57 #include <sys/malloc.h>
     58 #include <sys/kernel.h>
     59 #include <sys/queue.h>
     60 #include <sys/device.h>
     61 #include <sys/reboot.h>
     62 
     63 #include <sys/bus.h>
     64 #include <sys/intr.h>
     65 
     66 #include <dev/pci/pcireg.h>
     67 #include <dev/pci/pcivar.h>
     68 
     69 
     70 /* XXXX some i386 on-board chips act weird when memory-mapped */
     71 #ifndef __i386__
     72 #define AHC_ALLOW_MEMIO
     73 #endif
     74 
     75 #define AHC_PCI_IOADDR	PCI_MAPREG_START	/* I/O Address */
     76 #define AHC_PCI_MEMADDR	(PCI_MAPREG_START + 4)	/* Mem I/O Address */
     77 
     78 #include <dev/ic/aic7xxx_osm.h>
     79 #include <dev/ic/aic7xxx_inline.h>
     80 
     81 #include <dev/ic/smc93cx6var.h>
     82 
     83 
     84 static inline uint64_t
     85 ahc_compose_id(u_int device, u_int vendor, u_int subdevice, u_int subvendor)
     86 {
     87 	uint64_t id;
     88 
     89 	id = subvendor
     90 	   | (subdevice << 16)
     91 	   | ((uint64_t)vendor << 32)
     92 	   | ((uint64_t)device << 48);
     93 
     94 	return (id);
     95 }
     96 
     97 #define ID_ALL_MASK			0xFFFFFFFFFFFFFFFFull
     98 #define ID_DEV_VENDOR_MASK		0xFFFFFFFF00000000ull
     99 #define ID_9005_GENERIC_MASK		0xFFF0FFFF00000000ull
    100 #define ID_9005_SISL_MASK		0x000FFFFF00000000ull
    101 #define ID_9005_SISL_ID			0x0005900500000000ull
    102 #define ID_AIC7850			0x5078900400000000ull
    103 #define ID_AHA_2902_04_10_15_20_30C	0x5078900478509004ull
    104 #define ID_AIC7855			0x5578900400000000ull
    105 #define ID_AIC7859			0x3860900400000000ull
    106 #define ID_AHA_2930CU			0x3860900438699004ull
    107 #define ID_AIC7860			0x6078900400000000ull
    108 #define ID_AIC7860C			0x6078900478609004ull
    109 #define ID_AHA_1480A			0x6075900400000000ull
    110 #define ID_AHA_2940AU_0			0x6178900400000000ull
    111 #define ID_AHA_2940AU_1			0x6178900478619004ull
    112 #define ID_AHA_2940AU_CN		0x2178900478219004ull
    113 #define ID_AHA_2930C_VAR		0x6038900438689004ull
    114 
    115 #define ID_AIC7870			0x7078900400000000ull
    116 #define ID_AHA_2940			0x7178900400000000ull
    117 #define ID_AHA_3940			0x7278900400000000ull
    118 #define ID_AHA_398X			0x7378900400000000ull
    119 #define ID_AHA_2944			0x7478900400000000ull
    120 #define ID_AHA_3944			0x7578900400000000ull
    121 #define ID_AHA_4944			0x7678900400000000ull
    122 
    123 #define ID_AIC7880			0x8078900400000000ull
    124 #define ID_AIC7880_B			0x8078900478809004ull
    125 #define ID_AHA_2940U			0x8178900400000000ull
    126 #define ID_AHA_3940U			0x8278900400000000ull
    127 #define ID_AHA_2944U			0x8478900400000000ull
    128 #define ID_AHA_3944U			0x8578900400000000ull
    129 #define ID_AHA_398XU			0x8378900400000000ull
    130 #define ID_AHA_4944U			0x8678900400000000ull
    131 #define ID_AHA_2940UB			0x8178900478819004ull
    132 #define ID_AHA_2930U			0x8878900478889004ull
    133 #define ID_AHA_2940U_PRO		0x8778900478879004ull
    134 #define ID_AHA_2940U_CN			0x0078900478009004ull
    135 
    136 #define ID_AIC7895			0x7895900478959004ull
    137 #define ID_AIC7895_ARO			0x7890900478939004ull
    138 #define ID_AIC7895_ARO_MASK		0xFFF0FFFFFFFFFFFFull
    139 #define ID_AHA_2940U_DUAL		0x7895900478919004ull
    140 #define ID_AHA_3940AU			0x7895900478929004ull
    141 #define ID_AHA_3944AU			0x7895900478949004ull
    142 
    143 #define ID_AIC7890			0x001F9005000F9005ull
    144 #define ID_AIC7890_ARO			0x00139005000F9005ull
    145 #define ID_AAA_131U2			0x0013900500039005ull
    146 #define ID_AHA_2930U2			0x0011900501819005ull
    147 #define ID_AHA_2940U2B			0x00109005A1009005ull
    148 #define ID_AHA_2940U2_OEM		0x0010900521809005ull
    149 #define ID_AHA_2940U2			0x00109005A1809005ull
    150 #define ID_AHA_2950U2B			0x00109005E1009005ull
    151 
    152 #define ID_AIC7892			0x008F9005FFFF9005ull
    153 #define ID_AIC7892_ARO			0x00839005FFFF9005ull
    154 #define ID_AHA_2915LP			0x0082900502109005ull
    155 #define ID_AHA_29160			0x00809005E2A09005ull
    156 #define ID_AHA_29160_CPQ		0x00809005E2A00E11ull
    157 #define ID_AHA_29160N			0x0080900562A09005ull
    158 #define ID_AHA_29160C			0x0080900562209005ull
    159 #define ID_AHA_29160B			0x00809005E2209005ull
    160 #define ID_AHA_19160B			0x0081900562A19005ull
    161 
    162 #define ID_AIC7896			0x005F9005FFFF9005ull
    163 #define ID_AIC7896_ARO			0x00539005FFFF9005ull
    164 #define ID_AHA_3950U2B_0		0x00509005FFFF9005ull
    165 #define ID_AHA_3950U2B_1		0x00509005F5009005ull
    166 #define ID_AHA_3950U2D_0		0x00519005FFFF9005ull
    167 #define ID_AHA_3950U2D_1		0x00519005B5009005ull
    168 
    169 #define ID_AIC7899			0x00CF9005FFFF9005ull
    170 #define ID_AIC7899_ARO			0x00C39005FFFF9005ull
    171 #define ID_AHA_3960D			0x00C09005F6209005ull
    172 #define ID_AHA_3960D_CPQ		0x00C09005F6200E11ull
    173 
    174 #define ID_AIC7810			0x1078900400000000ull
    175 #define ID_AIC7815			0x7815900400000000ull
    176 
    177 #define DEVID_9005_TYPE(id) ((id) & 0xF)
    178 #define		DEVID_9005_TYPE_HBA		0x0	/* Standard Card */
    179 #define		DEVID_9005_TYPE_AAA		0x3	/* RAID Card */
    180 #define		DEVID_9005_TYPE_SISL		0x5	/* Container ROMB */
    181 #define		DEVID_9005_TYPE_MB		0xF	/* On Motherboard */
    182 
    183 #define DEVID_9005_MAXRATE(id) (((id) & 0x30) >> 4)
    184 #define		DEVID_9005_MAXRATE_U160		0x0
    185 #define		DEVID_9005_MAXRATE_ULTRA2	0x1
    186 #define		DEVID_9005_MAXRATE_ULTRA	0x2
    187 #define		DEVID_9005_MAXRATE_FAST		0x3
    188 
    189 #define DEVID_9005_MFUNC(id) (((id) & 0x40) >> 6)
    190 
    191 #define DEVID_9005_CLASS(id) (((id) & 0xFF00) >> 8)
    192 #define		DEVID_9005_CLASS_SPI		0x0	/* Parallel SCSI */
    193 
    194 #define SUBID_9005_TYPE(id) ((id) & 0xF)
    195 #define		SUBID_9005_TYPE_MB		0xF	/* On Motherboard */
    196 #define		SUBID_9005_TYPE_CARD		0x0	/* Standard Card */
    197 #define		SUBID_9005_TYPE_LCCARD		0x1	/* Low Cost Card */
    198 #define		SUBID_9005_TYPE_RAID		0x3	/* Combined with Raid */
    199 
    200 #define SUBID_9005_TYPE_KNOWN(id)			\
    201 	  ((((id) & 0xF) == SUBID_9005_TYPE_MB)		\
    202 	|| (((id) & 0xF) == SUBID_9005_TYPE_CARD)	\
    203 	|| (((id) & 0xF) == SUBID_9005_TYPE_LCCARD)	\
    204 	|| (((id) & 0xF) == SUBID_9005_TYPE_RAID))
    205 
    206 #define SUBID_9005_MAXRATE(id) (((id) & 0x30) >> 4)
    207 #define		SUBID_9005_MAXRATE_ULTRA2	0x0
    208 #define		SUBID_9005_MAXRATE_ULTRA	0x1
    209 #define		SUBID_9005_MAXRATE_U160		0x2
    210 #define		SUBID_9005_MAXRATE_RESERVED	0x3
    211 
    212 #define SUBID_9005_SEEPTYPE(id)						\
    213 	((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)			\
    214 	 ? ((id) & 0xC0) >> 6						\
    215 	 : ((id) & 0x300) >> 8)
    216 #define		SUBID_9005_SEEPTYPE_NONE	0x0
    217 #define		SUBID_9005_SEEPTYPE_1K		0x1
    218 #define		SUBID_9005_SEEPTYPE_2K_4K	0x2
    219 #define		SUBID_9005_SEEPTYPE_RESERVED	0x3
    220 #define SUBID_9005_AUTOTERM(id)						\
    221 	((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)			\
    222 	 ? (((id) & 0x400) >> 10) == 0					\
    223 	 : (((id) & 0x40) >> 6) == 0)
    224 
    225 #define SUBID_9005_NUMCHAN(id)						\
    226 	((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)			\
    227 	 ? ((id) & 0x300) >> 8						\
    228 	 : ((id) & 0xC00) >> 10)
    229 
    230 #define SUBID_9005_LEGACYCONN(id)					\
    231 	((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)			\
    232 	 ? 0								\
    233 	 : ((id) & 0x80) >> 7)
    234 
    235 #define SUBID_9005_MFUNCENB(id)						\
    236 	((SUBID_9005_TYPE(id) == SUBID_9005_TYPE_MB)			\
    237 	 ? ((id) & 0x800) >> 11						\
    238 	 : ((id) & 0x1000) >> 12)
    239 /*
    240  * Informational only. Should use chip register to be
    241  * certain, but may be used in identification strings.
    242  */
    243 #define SUBID_9005_CARD_SCSIWIDTH_MASK	0x2000
    244 #define SUBID_9005_CARD_PCIWIDTH_MASK	0x4000
    245 #define SUBID_9005_CARD_SEDIFF_MASK	0x8000
    246 
    247 static ahc_device_setup_t ahc_aic785X_setup;
    248 static ahc_device_setup_t ahc_aic7860_setup;
    249 static ahc_device_setup_t ahc_apa1480_setup;
    250 static ahc_device_setup_t ahc_aic7870_setup;
    251 static ahc_device_setup_t ahc_aha394X_setup;
    252 static ahc_device_setup_t ahc_aha494X_setup;
    253 static ahc_device_setup_t ahc_aha398X_setup;
    254 static ahc_device_setup_t ahc_aic7880_setup;
    255 static ahc_device_setup_t ahc_aha2940Pro_setup;
    256 static ahc_device_setup_t ahc_aha394XU_setup;
    257 static ahc_device_setup_t ahc_aha398XU_setup;
    258 static ahc_device_setup_t ahc_aic7890_setup;
    259 static ahc_device_setup_t ahc_aic7892_setup;
    260 static ahc_device_setup_t ahc_aic7895_setup;
    261 static ahc_device_setup_t ahc_aic7896_setup;
    262 static ahc_device_setup_t ahc_aic7899_setup;
    263 static ahc_device_setup_t ahc_aha29160C_setup;
    264 static ahc_device_setup_t ahc_raid_setup;
    265 static ahc_device_setup_t ahc_aha394XX_setup;
    266 static ahc_device_setup_t ahc_aha494XX_setup;
    267 static ahc_device_setup_t ahc_aha398XX_setup;
    268 
    269 static const struct ahc_pci_identity ahc_pci_ident_table[] =
    270 {
    271 	/* aic7850 based controllers */
    272 	{
    273 		ID_AHA_2902_04_10_15_20_30C,
    274 		ID_ALL_MASK,
    275 		"Adaptec 2902/04/10/15/20/30C SCSI adapter",
    276 		ahc_aic785X_setup
    277 	},
    278 	/* aic7860 based controllers */
    279 	{
    280 		ID_AHA_2930CU,
    281 		ID_ALL_MASK,
    282 		"Adaptec 2930CU SCSI adapter",
    283 		ahc_aic7860_setup
    284 	},
    285 	{
    286 		ID_AHA_1480A & ID_DEV_VENDOR_MASK,
    287 		ID_DEV_VENDOR_MASK,
    288 		"Adaptec 1480A Ultra SCSI adapter",
    289 		ahc_apa1480_setup
    290 	},
    291 	{
    292 		ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK,
    293 		ID_DEV_VENDOR_MASK,
    294 		"Adaptec 2940A Ultra SCSI adapter",
    295 		ahc_aic7860_setup
    296 	},
    297 	{
    298 		ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK,
    299 		ID_DEV_VENDOR_MASK,
    300 		"Adaptec 2940A/CN Ultra SCSI adapter",
    301 		ahc_aic7860_setup
    302 	},
    303 	{
    304 		ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK,
    305 		ID_DEV_VENDOR_MASK,
    306 		"Adaptec 2930C Ultra SCSI adapter (VAR)",
    307 		ahc_aic7860_setup
    308 	},
    309 	/* aic7870 based controllers */
    310 	{
    311 		ID_AHA_2940,
    312 		ID_ALL_MASK,
    313 		"Adaptec 2940 SCSI adapter",
    314 		ahc_aic7870_setup
    315 	},
    316 	{
    317 		ID_AHA_3940,
    318 		ID_ALL_MASK,
    319 		"Adaptec 3940 SCSI adapter",
    320 		ahc_aha394X_setup
    321 	},
    322 	{
    323 		ID_AHA_398X,
    324 		ID_ALL_MASK,
    325 		"Adaptec 398X SCSI RAID adapter",
    326 		ahc_aha398X_setup
    327 	},
    328 	{
    329 		ID_AHA_2944,
    330 		ID_ALL_MASK,
    331 		"Adaptec 2944 SCSI adapter",
    332 		ahc_aic7870_setup
    333 	},
    334 	{
    335 		ID_AHA_3944,
    336 		ID_ALL_MASK,
    337 		"Adaptec 3944 SCSI adapter",
    338 		ahc_aha394X_setup
    339 	},
    340 	{
    341 		ID_AHA_4944,
    342 		ID_ALL_MASK,
    343 		"Adaptec 4944 SCSI adapter",
    344 		ahc_aha494X_setup
    345 	},
    346 	/* aic7880 based controllers */
    347 	{
    348 		ID_AHA_2940U & ID_DEV_VENDOR_MASK,
    349 		ID_DEV_VENDOR_MASK,
    350 		"Adaptec 2940 Ultra SCSI adapter",
    351 		ahc_aic7880_setup
    352 	},
    353 	{
    354 		ID_AHA_3940U & ID_DEV_VENDOR_MASK,
    355 		ID_DEV_VENDOR_MASK,
    356 		"Adaptec 3940 Ultra SCSI adapter",
    357 		ahc_aha394XU_setup
    358 	},
    359 	{
    360 		ID_AHA_2944U & ID_DEV_VENDOR_MASK,
    361 		ID_DEV_VENDOR_MASK,
    362 		"Adaptec 2944 Ultra SCSI adapter",
    363 		ahc_aic7880_setup
    364 	},
    365 	{
    366 		ID_AHA_3944U & ID_DEV_VENDOR_MASK,
    367 		ID_DEV_VENDOR_MASK,
    368 		"Adaptec 3944 Ultra SCSI adapter",
    369 		ahc_aha394XU_setup
    370 	},
    371 	{
    372 		ID_AHA_398XU & ID_DEV_VENDOR_MASK,
    373 		ID_DEV_VENDOR_MASK,
    374 		"Adaptec 398X Ultra SCSI RAID adapter",
    375 		ahc_aha398XU_setup
    376 	},
    377 	{
    378 		/*
    379 		 * XXX Don't know the slot numbers
    380 		 * so we can't identify channels
    381 		 */
    382 		ID_AHA_4944U & ID_DEV_VENDOR_MASK,
    383 		ID_DEV_VENDOR_MASK,
    384 		"Adaptec 4944 Ultra SCSI adapter",
    385 		ahc_aic7880_setup
    386 	},
    387 	{
    388 		ID_AHA_2930U & ID_DEV_VENDOR_MASK,
    389 		ID_DEV_VENDOR_MASK,
    390 		"Adaptec 2930 Ultra SCSI adapter",
    391 		ahc_aic7880_setup
    392 	},
    393 	{
    394 		ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK,
    395 		ID_DEV_VENDOR_MASK,
    396 		"Adaptec 2940 Pro Ultra SCSI adapter",
    397 		ahc_aha2940Pro_setup
    398 	},
    399 	{
    400 		ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK,
    401 		ID_DEV_VENDOR_MASK,
    402 		"Adaptec 2940/CN Ultra SCSI adapter",
    403 		ahc_aic7880_setup
    404 	},
    405 	/* Ignore all SISL (AAC on MB) based controllers. */
    406 	{
    407 		ID_9005_SISL_ID,
    408 		ID_9005_SISL_MASK,
    409 		NULL,
    410 		NULL
    411 	},
    412 	/* aic7890 based controllers */
    413 	{
    414 		ID_AHA_2930U2,
    415 		ID_ALL_MASK,
    416 		"Adaptec 2930 Ultra2 SCSI adapter",
    417 		ahc_aic7890_setup
    418 	},
    419 	{
    420 		ID_AHA_2940U2B,
    421 		ID_ALL_MASK,
    422 		"Adaptec 2940B Ultra2 SCSI adapter",
    423 		ahc_aic7890_setup
    424 	},
    425 	{
    426 		ID_AHA_2940U2_OEM,
    427 		ID_ALL_MASK,
    428 		"Adaptec 2940 Ultra2 SCSI adapter (OEM)",
    429 		ahc_aic7890_setup
    430 	},
    431 	{
    432 		ID_AHA_2940U2,
    433 		ID_ALL_MASK,
    434 		"Adaptec 2940 Ultra2 SCSI adapter",
    435 		ahc_aic7890_setup
    436 	},
    437 	{
    438 		ID_AHA_2950U2B,
    439 		ID_ALL_MASK,
    440 		"Adaptec 2950 Ultra2 SCSI adapter",
    441 		ahc_aic7890_setup
    442 	},
    443 	{
    444 		ID_AIC7890_ARO,
    445 		ID_ALL_MASK,
    446 		"Adaptec aic7890/91 Ultra2 SCSI adapter (ARO)",
    447 		ahc_aic7890_setup
    448 	},
    449 	{
    450 		ID_AAA_131U2,
    451 		ID_ALL_MASK,
    452 		"Adaptec AAA-131 Ultra2 RAID adapter",
    453 		ahc_aic7890_setup
    454 	},
    455 	/* aic7892 based controllers */
    456 	{
    457 		ID_AHA_29160,
    458 		ID_ALL_MASK,
    459 		"Adaptec 29160 Ultra160 SCSI adapter",
    460 		ahc_aic7892_setup
    461 	},
    462 	{
    463 		ID_AHA_29160_CPQ,
    464 		ID_ALL_MASK,
    465 		"Adaptec (Compaq OEM) 29160 Ultra160 SCSI adapter",
    466 		ahc_aic7892_setup
    467 	},
    468 	{
    469 		ID_AHA_29160N,
    470 		ID_ALL_MASK,
    471 		"Adaptec 29160N Ultra160 SCSI adapter",
    472 		ahc_aic7892_setup
    473 	},
    474 	{
    475 		ID_AHA_29160C,
    476 		ID_ALL_MASK,
    477 		"Adaptec 29160C Ultra160 SCSI adapter",
    478 		ahc_aha29160C_setup
    479 	},
    480 	{
    481 		ID_AHA_29160B,
    482 		ID_ALL_MASK,
    483 		"Adaptec 29160B Ultra160 SCSI adapter",
    484 		ahc_aic7892_setup
    485 	},
    486 	{
    487 		ID_AHA_19160B,
    488 		ID_ALL_MASK,
    489 		"Adaptec 19160B Ultra160 SCSI adapter",
    490 		ahc_aic7892_setup
    491 	},
    492 	{
    493 		ID_AIC7892_ARO,
    494 		ID_ALL_MASK,
    495 		"Adaptec aic7892 Ultra160 SCSI adapter (ARO)",
    496 		ahc_aic7892_setup
    497 	},
    498 	{
    499 		ID_AHA_2915LP,
    500 		ID_ALL_MASK,
    501 		"Adaptec 2915LP Ultra160 SCSI adapter",
    502 		ahc_aic7892_setup
    503 	},
    504 	/* aic7895 based controllers */
    505 	{
    506 		ID_AHA_2940U_DUAL,
    507 		ID_ALL_MASK,
    508 		"Adaptec 2940/DUAL Ultra SCSI adapter",
    509 		ahc_aic7895_setup
    510 	},
    511 	{
    512 		ID_AHA_3940AU,
    513 		ID_ALL_MASK,
    514 		"Adaptec 3940A Ultra SCSI adapter",
    515 		ahc_aic7895_setup
    516 	},
    517 	{
    518 		ID_AHA_3944AU,
    519 		ID_ALL_MASK,
    520 		"Adaptec 3944A Ultra SCSI adapter",
    521 		ahc_aic7895_setup
    522 	},
    523 	{
    524 		ID_AIC7895_ARO,
    525 		ID_AIC7895_ARO_MASK,
    526 		"Adaptec aic7895 Ultra SCSI adapter (ARO)",
    527 		ahc_aic7895_setup
    528 	},
    529 	/* aic7896/97 based controllers */
    530 	{
    531 		ID_AHA_3950U2B_0,
    532 		ID_ALL_MASK,
    533 		"Adaptec 3950B Ultra2 SCSI adapter",
    534 		ahc_aic7896_setup
    535 	},
    536 	{
    537 		ID_AHA_3950U2B_1,
    538 		ID_ALL_MASK,
    539 		"Adaptec 3950B Ultra2 SCSI adapter",
    540 		ahc_aic7896_setup
    541 	},
    542 	{
    543 		ID_AHA_3950U2D_0,
    544 		ID_ALL_MASK,
    545 		"Adaptec 3950D Ultra2 SCSI adapter",
    546 		ahc_aic7896_setup
    547 	},
    548 	{
    549 		ID_AHA_3950U2D_1,
    550 		ID_ALL_MASK,
    551 		"Adaptec 3950D Ultra2 SCSI adapter",
    552 		ahc_aic7896_setup
    553 	},
    554 	{
    555 		ID_AIC7896_ARO,
    556 		ID_ALL_MASK,
    557 		"Adaptec aic7896/97 Ultra2 SCSI adapter (ARO)",
    558 		ahc_aic7896_setup
    559 	},
    560 	/* aic7899 based controllers */
    561 	{
    562 		ID_AHA_3960D,
    563 		ID_ALL_MASK,
    564 		"Adaptec 3960D Ultra160 SCSI adapter",
    565 		ahc_aic7899_setup
    566 	},
    567 	{
    568 		ID_AHA_3960D_CPQ,
    569 		ID_ALL_MASK,
    570 		"Adaptec (Compaq OEM) 3960D Ultra160 SCSI adapter",
    571 		ahc_aic7899_setup
    572 	},
    573 	{
    574 		ID_AIC7899_ARO,
    575 		ID_ALL_MASK,
    576 		"Adaptec aic7899 Ultra160 SCSI adapter (ARO)",
    577 		ahc_aic7899_setup
    578 	},
    579 	/* Generic chip probes for devices we don't know 'exactly' */
    580 	{
    581 		ID_AIC7850 & ID_DEV_VENDOR_MASK,
    582 		ID_DEV_VENDOR_MASK,
    583 		"Adaptec aic7850 SCSI adapter",
    584 		ahc_aic785X_setup
    585 	},
    586 	{
    587 		ID_AIC7855 & ID_DEV_VENDOR_MASK,
    588 		ID_DEV_VENDOR_MASK,
    589 		"Adaptec aic7855 SCSI adapter",
    590 		ahc_aic785X_setup
    591 	},
    592 	{
    593 		ID_AIC7859 & ID_DEV_VENDOR_MASK,
    594 		ID_DEV_VENDOR_MASK,
    595 		"Adaptec aic7859 SCSI adapter",
    596 		ahc_aic7860_setup
    597 	},
    598 	{
    599 		ID_AIC7860 & ID_DEV_VENDOR_MASK,
    600 		ID_DEV_VENDOR_MASK,
    601 		"Adaptec aic7860 Ultra SCSI adapter",
    602 		ahc_aic7860_setup
    603 	},
    604 	{
    605 		ID_AIC7870 & ID_DEV_VENDOR_MASK,
    606 		ID_DEV_VENDOR_MASK,
    607 		"Adaptec aic7870 SCSI adapter",
    608 		ahc_aic7870_setup
    609 	},
    610 	{
    611 		ID_AIC7880 & ID_DEV_VENDOR_MASK,
    612 		ID_DEV_VENDOR_MASK,
    613 		"Adaptec aic7880 Ultra SCSI adapter",
    614 		ahc_aic7880_setup
    615 	},
    616 	{
    617 		ID_AIC7890 & ID_9005_GENERIC_MASK,
    618 		ID_9005_GENERIC_MASK,
    619 		"Adaptec aic7890/91 Ultra2 SCSI adapter",
    620 		ahc_aic7890_setup
    621 	},
    622 	{
    623 		ID_AIC7892 & ID_9005_GENERIC_MASK,
    624 		ID_9005_GENERIC_MASK,
    625 		"Adaptec aic7892 Ultra160 SCSI adapter",
    626 		ahc_aic7892_setup
    627 	},
    628 	{
    629 		ID_AIC7895 & ID_DEV_VENDOR_MASK,
    630 		ID_DEV_VENDOR_MASK,
    631 		"Adaptec aic7895 Ultra SCSI adapter",
    632 		ahc_aic7895_setup
    633 	},
    634 	{
    635 		ID_AIC7896 & ID_9005_GENERIC_MASK,
    636 		ID_9005_GENERIC_MASK,
    637 		"Adaptec aic7896/97 Ultra2 SCSI adapter",
    638 		ahc_aic7896_setup
    639 	},
    640 	{
    641 		ID_AIC7899 & ID_9005_GENERIC_MASK,
    642 		ID_9005_GENERIC_MASK,
    643 		"Adaptec aic7899 Ultra160 SCSI adapter",
    644 		ahc_aic7899_setup
    645 	},
    646 	{
    647 		ID_AIC7810 & ID_DEV_VENDOR_MASK,
    648 		ID_DEV_VENDOR_MASK,
    649 		"Adaptec aic7810 RAID memory controller",
    650 		ahc_raid_setup
    651 	},
    652 	{
    653 		ID_AIC7815 & ID_DEV_VENDOR_MASK,
    654 		ID_DEV_VENDOR_MASK,
    655 		"Adaptec aic7815 RAID memory controller",
    656 		ahc_raid_setup
    657 	}
    658 };
    659 
    660 static const u_int ahc_num_pci_devs = NUM_ELEMENTS(ahc_pci_ident_table);
    661 
    662 #define AHC_394X_SLOT_CHANNEL_A	4
    663 #define AHC_394X_SLOT_CHANNEL_B	5
    664 
    665 #define AHC_398X_SLOT_CHANNEL_A	4
    666 #define AHC_398X_SLOT_CHANNEL_B	8
    667 #define AHC_398X_SLOT_CHANNEL_C	12
    668 
    669 #define AHC_494X_SLOT_CHANNEL_A	4
    670 #define AHC_494X_SLOT_CHANNEL_B	5
    671 #define AHC_494X_SLOT_CHANNEL_C	6
    672 #define AHC_494X_SLOT_CHANNEL_D	7
    673 
    674 #define	DEVCONFIG		0x40
    675 #define		PCIERRGENDIS	0x80000000ul
    676 #define		SCBSIZE32	0x00010000ul	/* aic789X only */
    677 #define		REXTVALID	0x00001000ul	/* ultra cards only */
    678 #define		MPORTMODE	0x00000400ul	/* aic7870+ only */
    679 #define		RAMPSM		0x00000200ul	/* aic7870+ only */
    680 #define		VOLSENSE	0x00000100ul
    681 #define		PCI64BIT	0x00000080ul	/* 64Bit PCI bus (Ultra2 Only)*/
    682 #define		SCBRAMSEL	0x00000080ul
    683 #define		MRDCEN		0x00000040ul
    684 #define		EXTSCBTIME	0x00000020ul	/* aic7870 only */
    685 #define		EXTSCBPEN	0x00000010ul	/* aic7870 only */
    686 #define		BERREN		0x00000008ul
    687 #define		DACEN		0x00000004ul
    688 #define		STPWLEVEL	0x00000002ul
    689 #define		DIFACTNEGEN	0x00000001ul	/* aic7870 only */
    690 
    691 #define	CSIZE_LATTIME		0x0c
    692 #define		CACHESIZE	0x0000003ful	/* only 5 bits */
    693 #define		LATTIME		0x0000ff00ul
    694 
    695 /* PCI STATUS definitions */
    696 #define	DPE	0x80
    697 #define SSE	0x40
    698 #define	RMA	0x20
    699 #define	RTA	0x10
    700 #define STA	0x08
    701 #define DPR	0x01
    702 
    703 static int ahc_9005_subdevinfo_valid(uint16_t vendor, uint16_t device,
    704 				     uint16_t subvendor, uint16_t subdevice);
    705 static int ahc_ext_scbram_present(struct ahc_softc *ahc);
    706 static void ahc_scbram_config(struct ahc_softc *ahc, int enable,
    707 				  int pcheck, int fast, int large);
    708 static void ahc_probe_ext_scbram(struct ahc_softc *ahc);
    709 
    710 static void ahc_pci_intr(struct ahc_softc *);
    711 
    712 static const struct ahc_pci_identity *
    713 ahc_find_pci_device(pcireg_t id, pcireg_t subid, u_int func)
    714 {
    715 	u_int64_t  full_id;
    716 	const struct	   ahc_pci_identity *entry;
    717 	u_int	   i;
    718 
    719 	full_id = ahc_compose_id(PCI_PRODUCT(id), PCI_VENDOR(id),
    720 				 PCI_PRODUCT(subid), PCI_VENDOR(subid));
    721 
    722 	/*
    723 	 * If the second function is not hooked up, ignore it.
    724 	 * Unfortunately, not all MB vendors implement the
    725 	 * subdevice ID as per the Adaptec spec, so do our best
    726 	 * to sanity check it prior to accepting the subdevice
    727 	 * ID as valid.
    728 	 */
    729 	if (func > 0
    730 	    && ahc_9005_subdevinfo_valid(PCI_VENDOR(id), PCI_PRODUCT(id),
    731 					 PCI_VENDOR(subid), PCI_PRODUCT(subid))
    732 	    && SUBID_9005_MFUNCENB(PCI_PRODUCT(subid)) == 0)
    733 		return (NULL);
    734 
    735 	for (i = 0; i < ahc_num_pci_devs; i++) {
    736 		entry = &ahc_pci_ident_table[i];
    737 		if (entry->full_id == (full_id & entry->id_mask))
    738 			return (entry);
    739 	}
    740 	return (NULL);
    741 }
    742 
    743 static int
    744 ahc_pci_probe(device_t parent, cfdata_t match, void *aux)
    745 {
    746 	struct pci_attach_args *pa = aux;
    747 	const struct	   ahc_pci_identity *entry;
    748 	pcireg_t   subid;
    749 
    750 	subid = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
    751 	entry = ahc_find_pci_device(pa->pa_id, subid, pa->pa_function);
    752 	return (entry != NULL && entry->setup != NULL) ? 1 : 0;
    753 }
    754 
    755 static void
    756 ahc_pci_attach(device_t parent, device_t self, void *aux)
    757 {
    758 	struct pci_attach_args *pa = aux;
    759 	const struct	   ahc_pci_identity *entry;
    760 	struct		   ahc_softc *ahc = device_private(self);
    761 	pcireg_t	   command;
    762 	u_int		   our_id = 0;
    763 	u_int		   sxfrctl1;
    764 	u_int		   scsiseq;
    765 	u_int		   sblkctl;
    766 	uint8_t 	   dscommand0;
    767 	uint32_t	   devconfig;
    768 	int		   error;
    769 	pcireg_t	   subid;
    770 	int		   ioh_valid;
    771 	bus_space_tag_t    st, iot;
    772 	bus_space_handle_t sh, ioh;
    773 #ifdef AHC_ALLOW_MEMIO
    774 	int		   memh_valid;
    775 	bus_space_tag_t    memt;
    776 	bus_space_handle_t memh;
    777 	pcireg_t memtype;
    778 #endif
    779 	pci_intr_handle_t  ih;
    780 	const char        *intrstr;
    781 	struct ahc_pci_busdata *bd;
    782 	bool               override_ultra;
    783 	char intrbuf[PCI_INTRSTR_LEN];
    784 
    785 	ahc->sc_dev = self;
    786 	ahc_set_name(ahc, device_xname(ahc->sc_dev));
    787 	ahc->parent_dmat = pa->pa_dmat;
    788 
    789 	command = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
    790 	subid = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
    791 	entry = ahc_find_pci_device(pa->pa_id, subid, pa->pa_function);
    792 	if (entry == NULL)
    793 		return;
    794 	aprint_naive("\n");
    795 	aprint_normal(": %s\n", entry->name);
    796 
    797 	/* Keep information about the PCI bus */
    798 	bd = malloc(sizeof (struct ahc_pci_busdata), M_DEVBUF, M_WAITOK | M_ZERO);
    799 	bd->pc = pa->pa_pc;
    800 	bd->tag = pa->pa_tag;
    801 	bd->func = pa->pa_function;
    802 	bd->dev = pa->pa_device;
    803 	bd->class = pa->pa_class;
    804 
    805 	ahc->bd = bd;
    806 
    807 	ahc->description = entry->name;
    808 
    809 	error = entry->setup(ahc);
    810 	if (error != 0)
    811 		return;
    812 
    813 	ioh_valid = 0;
    814 
    815 #ifdef AHC_ALLOW_MEMIO
    816 	memh_valid = 0;
    817 	memtype = pci_mapreg_type(pa->pa_pc, pa->pa_tag, AHC_PCI_MEMADDR);
    818 	switch (memtype) {
    819 	case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_32BIT:
    820 	case PCI_MAPREG_TYPE_MEM | PCI_MAPREG_MEM_TYPE_64BIT:
    821 		memh_valid = (pci_mapreg_map(pa, AHC_PCI_MEMADDR,
    822 			memtype, 0, &memt, &memh, NULL, NULL) == 0);
    823 		break;
    824 	default:
    825 		memh_valid = 0;
    826 	}
    827 #endif
    828 	ioh_valid = (pci_mapreg_map(pa, AHC_PCI_IOADDR,
    829 				    PCI_MAPREG_TYPE_IO, 0, &iot,
    830 				    &ioh, NULL, NULL) == 0);
    831 
    832 #if 0
    833 	printf("%s: bus info: memt 0x%lx, memh 0x%lx, iot 0x%lx, ioh 0x%lx\n",
    834 	    ahc_name(ahc), (u_long)memt, (u_long)memh, (u_long)iot,
    835 	    (u_long)ioh);
    836 #endif
    837 
    838 #ifdef AHC_ALLOW_MEMIO
    839 	if (memh_valid) {
    840 		st = memt;
    841 		sh = memh;
    842 	} else
    843 #endif
    844 	if (ioh_valid) {
    845 		st = iot;
    846 		sh = ioh;
    847 	} else {
    848 		aprint_error(": unable to map registers\n");
    849 		return;
    850 	}
    851 	ahc->tag = st;
    852 	ahc->bsh = sh;
    853 
    854 	ahc->chip |= AHC_PCI;
    855 	/*
    856 	 * Before we continue probing the card, ensure that
    857 	 * its interrupts are *disabled*.  We don't want
    858 	 * a misstep to hang the machine in an interrupt
    859 	 * storm.
    860 	 */
    861 	ahc_intr_enable(ahc, FALSE);
    862 
    863 	/*
    864 	 * XXX somehow reading this once fails on some sparc64 systems.
    865 	 *     This may be a problem in the sparc64 PCI code. Doing it
    866 	 *     twice works around it.
    867 	 */
    868 	devconfig = pci_conf_read(pa->pa_pc, pa->pa_tag, DEVCONFIG);
    869 	devconfig = pci_conf_read(pa->pa_pc, pa->pa_tag, DEVCONFIG);
    870 
    871 	/*
    872 	 * If we need to support high memory, enable dual
    873 	 * address cycles.  This bit must be set to enable
    874 	 * high address bit generation even if we are on a
    875 	 * 64bit bus (PCI64BIT set in devconfig).
    876 	 */
    877 	if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
    878 
    879 		if (1/*bootverbose*/)
    880 			aprint_normal("%s: Enabling 39Bit Addressing\n",
    881 			       ahc_name(ahc));
    882 		devconfig |= DACEN;
    883 	}
    884 
    885 	/* Ensure that pci error generation, a test feature, is disabled. */
    886 	devconfig |= PCIERRGENDIS;
    887 
    888 	pci_conf_write(pa->pa_pc, pa->pa_tag, DEVCONFIG, devconfig);
    889 
    890 	/* Ensure busmastering is enabled */
    891 	command |= PCI_COMMAND_MASTER_ENABLE;
    892 	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, command);
    893 
    894 	/*
    895 	 * Disable PCI parity error reporting.  Users typically
    896 	 * do this to work around broken PCI chipsets that get
    897 	 * the parity timing wrong and thus generate lots of spurious
    898 	 * errors.
    899 	 */
    900 	if ((ahc->flags & AHC_DISABLE_PCI_PERR) != 0)
    901 	  command &= ~PCI_COMMAND_PARITY_ENABLE;
    902 	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, command);
    903 
    904 	/* On all PCI adapters, we allow SCB paging */
    905 	ahc->flags |= AHC_PAGESCBS;
    906 	error = ahc_softc_init(ahc);
    907 	if (error != 0)
    908 		goto error_out;
    909 
    910 	ahc->bus_intr = ahc_pci_intr;
    911 
    912 	/* Remember how the card was setup in case there is no SEEPROM */
    913 	if ((ahc_inb(ahc, HCNTRL) & POWRDN) == 0) {
    914 		ahc_pause(ahc);
    915 		if ((ahc->features & AHC_ULTRA2) != 0)
    916 			our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID;
    917 		else
    918 			our_id = ahc_inb(ahc, SCSIID) & OID;
    919 		sxfrctl1 = ahc_inb(ahc, SXFRCTL1) & STPWEN;
    920 		scsiseq = ahc_inb(ahc, SCSISEQ);
    921 	} else {
    922 		sxfrctl1 = STPWEN;
    923 		our_id = 7;
    924 		scsiseq = 0;
    925 	}
    926 
    927 	error = ahc_reset(ahc);
    928 	if (error != 0)
    929 		goto error_out;
    930 
    931 	if ((ahc->features & AHC_DT) != 0) {
    932 		u_int sfunct;
    933 
    934 		/* Perform ALT-Mode Setup */
    935 		sfunct = ahc_inb(ahc, SFUNCT) & ~ALT_MODE;
    936 		ahc_outb(ahc, SFUNCT, sfunct | ALT_MODE);
    937 		ahc_outb(ahc, OPTIONMODE,
    938 			 OPTIONMODE_DEFAULTS|AUTOACKEN|BUSFREEREV|EXPPHASEDIS);
    939 		ahc_outb(ahc, SFUNCT, sfunct);
    940 
    941 		/* Normal mode setup */
    942 		ahc_outb(ahc, CRCCONTROL1, CRCVALCHKEN|CRCENDCHKEN|CRCREQCHKEN
    943 					  |TARGCRCENDEN);
    944 	}
    945 
    946 	if (pci_intr_map(pa, &ih)) {
    947 		aprint_error("%s: couldn't map interrupt\n", ahc_name(ahc));
    948 		ahc_free(ahc);
    949 		return;
    950 	}
    951 	intrstr = pci_intr_string(pa->pa_pc, ih, intrbuf, sizeof(intrbuf));
    952 	ahc->ih = pci_intr_establish_xname(pa->pa_pc, ih, IPL_BIO, ahc_intr,
    953 	    ahc, device_xname(self));
    954 	if (ahc->ih == NULL) {
    955 		aprint_error_dev(ahc->sc_dev,
    956 		    "couldn't establish interrupt\n");
    957 		if (intrstr != NULL)
    958 			aprint_error(" at %s", intrstr);
    959 		aprint_error("\n");
    960 		ahc_free(ahc);
    961 		return;
    962 	}
    963 	if (intrstr != NULL)
    964 		aprint_normal("%s: interrupting at %s\n", ahc_name(ahc),
    965 		    intrstr);
    966 
    967 	dscommand0 = ahc_inb(ahc, DSCOMMAND0);
    968 	dscommand0 |= MPARCKEN|CACHETHEN;
    969 	if ((ahc->features & AHC_ULTRA2) != 0) {
    970 
    971 		/*
    972 		 * DPARCKEN doesn't work correctly on
    973 		 * some MBs so don't use it.
    974 		 */
    975 		dscommand0 &= ~DPARCKEN;
    976 	}
    977 
    978 	/*
    979 	 * Handle chips that must have cache line
    980 	 * streaming (dis/en)abled.
    981 	 */
    982 	if ((ahc->bugs & AHC_CACHETHEN_DIS_BUG) != 0)
    983 		dscommand0 |= CACHETHEN;
    984 
    985 	if ((ahc->bugs & AHC_CACHETHEN_BUG) != 0)
    986 		dscommand0 &= ~CACHETHEN;
    987 
    988 	ahc_outb(ahc, DSCOMMAND0, dscommand0);
    989 
    990 	ahc->pci_cachesize =
    991 	    pci_conf_read(pa->pa_pc, pa->pa_tag, CSIZE_LATTIME) & CACHESIZE;
    992 	ahc->pci_cachesize *= 4;
    993 
    994 	if ((ahc->bugs & AHC_PCI_2_1_RETRY_BUG) != 0
    995 	    && ahc->pci_cachesize == 4) {
    996 		pci_conf_write(pa->pa_pc, pa->pa_tag, CSIZE_LATTIME, 0);
    997 		ahc->pci_cachesize = 0;
    998 	}
    999 
   1000 	/*
   1001 	 * We cannot perform ULTRA speeds without the presence
   1002 	 * of the external precision resistor.
   1003 	 * Allow override for the SGI O2 though, which has two onboard ahc
   1004 	 * that fail here but are perfectly capable of ultra speeds.
   1005 	 */
   1006 	override_ultra = FALSE;
   1007 	prop_dictionary_get_bool(device_properties(self),
   1008 	    "aic7xxx-override-ultra", &override_ultra);
   1009 
   1010 	if (((ahc->features & AHC_ULTRA) != 0) && (!override_ultra)) {
   1011 		uint32_t dvconfig;
   1012 
   1013 		dvconfig = pci_conf_read(pa->pa_pc, pa->pa_tag, DEVCONFIG);
   1014 		if ((dvconfig & REXTVALID) == 0)
   1015 			ahc->features &= ~AHC_ULTRA;
   1016 	}
   1017 
   1018 	ahc->seep_config = malloc(sizeof(*ahc->seep_config),
   1019 				  M_DEVBUF, M_WAITOK | M_ZERO);
   1020 
   1021 	/* See if we have a SEEPROM and perform auto-term */
   1022 	ahc_check_extport(ahc, &sxfrctl1);
   1023 
   1024 	/*
   1025 	 * Take the LED out of diagnostic mode
   1026 	 */
   1027 	sblkctl = ahc_inb(ahc, SBLKCTL);
   1028 	ahc_outb(ahc, SBLKCTL, (sblkctl & ~(DIAGLEDEN|DIAGLEDON)));
   1029 
   1030 	if ((ahc->features & AHC_ULTRA2) != 0) {
   1031 		ahc_outb(ahc, DFF_THRSH, RD_DFTHRSH_MAX|WR_DFTHRSH_MAX);
   1032 	} else {
   1033 		ahc_outb(ahc, DSPCISTATUS, DFTHRSH_100);
   1034 	}
   1035 
   1036 	if (ahc->flags & AHC_USEDEFAULTS) {
   1037 		/*
   1038 		 * PCI Adapter default setup
   1039 		 * Should only be used if the adapter does not have
   1040 		 * a SEEPROM.
   1041 		 */
   1042 		/* See if someone else set us up already */
   1043 		if ((ahc->flags & AHC_NO_BIOS_INIT) == 0
   1044 		 && scsiseq != 0) {
   1045 			prop_bool_t usetd;
   1046 
   1047 			printf("%s: Using left over BIOS settings\n",
   1048 				ahc_name(ahc));
   1049 			ahc->flags &= ~AHC_USEDEFAULTS;
   1050 			/*
   1051 			 * Ignore target device settings and use default
   1052 			 * if BIOS initializes chip's SRAM with some
   1053 			 * conservative settings (async, no tagged
   1054 			 * queuing etc.) and machine dependent device
   1055 			 * property is set.
   1056 			 */
   1057 			usetd = prop_dictionary_get(
   1058 					device_properties(ahc->sc_dev),
   1059 					"aic7xxx-use-target-defaults");
   1060 			if (usetd != NULL) {
   1061 				KASSERT(prop_object_type(usetd) ==
   1062 					PROP_TYPE_BOOL);
   1063 				if (prop_bool_true(usetd))
   1064 					ahc->flags |= AHC_USETARGETDEFAULTS;
   1065 			}
   1066 			ahc->flags |= AHC_BIOS_ENABLED;
   1067 		} else {
   1068 			/*
   1069 			 * Assume only one connector and always turn
   1070 			 * on termination.
   1071 			 */
   1072  			our_id = 0x07;
   1073 			sxfrctl1 = STPWEN;
   1074 		}
   1075 		ahc_outb(ahc, SCSICONF, our_id|ENSPCHK|RESET_SCSI);
   1076 
   1077 		ahc->our_id = our_id;
   1078 	}
   1079 
   1080 	/*
   1081 	 * Take a look to see if we have external SRAM.
   1082 	 * We currently do not attempt to use SRAM that is
   1083 	 * shared among multiple controllers.
   1084 	 */
   1085 	ahc_probe_ext_scbram(ahc);
   1086 
   1087 	/*
   1088 	 * Record our termination setting for the
   1089 	 * generic initialization routine.
   1090 	 */
   1091 	if ((sxfrctl1 & STPWEN) != 0)
   1092 		ahc->flags |= AHC_TERM_ENB_A;
   1093 
   1094 	if (ahc_init(ahc))
   1095 		goto error_out;
   1096 
   1097 	ahc_attach(ahc);
   1098 
   1099 	return;
   1100 
   1101  error_out:
   1102 	ahc_free(ahc);
   1103 	return;
   1104 }
   1105 
   1106 CFATTACH_DECL_NEW(ahc_pci, sizeof(struct ahc_softc),
   1107     ahc_pci_probe, ahc_pci_attach, NULL, NULL);
   1108 
   1109 static int
   1110 ahc_9005_subdevinfo_valid(uint16_t device, uint16_t vendor,
   1111 			  uint16_t subdevice, uint16_t subvendor)
   1112 {
   1113 	int result;
   1114 
   1115 	/* Default to invalid. */
   1116 	result = 0;
   1117 	if (vendor == 0x9005
   1118 	 && subvendor == 0x9005
   1119          && subdevice != device
   1120          && SUBID_9005_TYPE_KNOWN(subdevice) != 0) {
   1121 
   1122 		switch (SUBID_9005_TYPE(subdevice)) {
   1123 		case SUBID_9005_TYPE_MB:
   1124 			break;
   1125 		case SUBID_9005_TYPE_CARD:
   1126 		case SUBID_9005_TYPE_LCCARD:
   1127 			/*
   1128 			 * Currently only trust Adaptec cards to
   1129 			 * get the sub device info correct.
   1130 			 */
   1131 			if (DEVID_9005_TYPE(device) == DEVID_9005_TYPE_HBA)
   1132 				result = 1;
   1133 			break;
   1134 		case SUBID_9005_TYPE_RAID:
   1135 			break;
   1136 		default:
   1137 			break;
   1138 		}
   1139 	}
   1140 	return (result);
   1141 }
   1142 
   1143 
   1144 /*
   1145  * Test for the presence of external sram in an
   1146  * "unshared" configuration.
   1147  */
   1148 static int
   1149 ahc_ext_scbram_present(struct ahc_softc *ahc)
   1150 {
   1151 	u_int chip;
   1152 	int ramps;
   1153 	int single_user;
   1154 	uint32_t devconfig;
   1155 
   1156 	chip = ahc->chip & AHC_CHIPID_MASK;
   1157 	devconfig = pci_conf_read(ahc->bd->pc, ahc->bd->tag, DEVCONFIG);
   1158 	single_user = (devconfig & MPORTMODE) != 0;
   1159 
   1160 	if ((ahc->features & AHC_ULTRA2) != 0)
   1161 		ramps = (ahc_inb(ahc, DSCOMMAND0) & RAMPS) != 0;
   1162 	else if (chip == AHC_AIC7895 || chip == AHC_AIC7895C)
   1163 		/*
   1164 		 * External SCBRAM arbitration is flakey
   1165 		 * on these chips.  Unfortunately this means
   1166 		 * we don't use the extra SCB ram space on the
   1167 		 * 3940AUW.
   1168 		 */
   1169 		ramps = 0;
   1170 	else if (chip >= AHC_AIC7870)
   1171 		ramps = (devconfig & RAMPSM) != 0;
   1172 	else
   1173 		ramps = 0;
   1174 
   1175 	if (ramps && single_user)
   1176 		return (1);
   1177 	return (0);
   1178 }
   1179 
   1180 /*
   1181  * Enable external scbram.
   1182  */
   1183 static void
   1184 ahc_scbram_config(struct ahc_softc *ahc, int enable, int pcheck,
   1185 		  int fast, int large)
   1186 {
   1187 	uint32_t devconfig;
   1188 
   1189 	if (ahc->features & AHC_MULTI_FUNC) {
   1190 		/*
   1191 		 * Set the SCB Base addr (highest address bit)
   1192 		 * depending on which channel we are.
   1193 		 */
   1194 		ahc_outb(ahc, SCBBADDR, ahc->bd->func);
   1195 	}
   1196 
   1197 	ahc->flags &= ~AHC_LSCBS_ENABLED;
   1198 	if (large)
   1199 		ahc->flags |= AHC_LSCBS_ENABLED;
   1200 	devconfig = pci_conf_read(ahc->bd->pc, ahc->bd->tag, DEVCONFIG);
   1201 	if ((ahc->features & AHC_ULTRA2) != 0) {
   1202 		u_int dscommand0;
   1203 
   1204 		dscommand0 = ahc_inb(ahc, DSCOMMAND0);
   1205 		if (enable)
   1206 			dscommand0 &= ~INTSCBRAMSEL;
   1207 		else
   1208 			dscommand0 |= INTSCBRAMSEL;
   1209 		if (large)
   1210 			dscommand0 &= ~USCBSIZE32;
   1211 		else
   1212 			dscommand0 |= USCBSIZE32;
   1213 		ahc_outb(ahc, DSCOMMAND0, dscommand0);
   1214 	} else {
   1215 		if (fast)
   1216 			devconfig &= ~EXTSCBTIME;
   1217 		else
   1218 			devconfig |= EXTSCBTIME;
   1219 		if (enable)
   1220 			devconfig &= ~SCBRAMSEL;
   1221 		else
   1222 			devconfig |= SCBRAMSEL;
   1223 		if (large)
   1224 			devconfig &= ~SCBSIZE32;
   1225 		else
   1226 			devconfig |= SCBSIZE32;
   1227 	}
   1228 	if (pcheck)
   1229 		devconfig |= EXTSCBPEN;
   1230 	else
   1231 		devconfig &= ~EXTSCBPEN;
   1232 
   1233 	pci_conf_write(ahc->bd->pc, ahc->bd->tag, DEVCONFIG, devconfig);
   1234 }
   1235 
   1236 /*
   1237  * Take a look to see if we have external SRAM.
   1238  * We currently do not attempt to use SRAM that is
   1239  * shared among multiple controllers.
   1240  */
   1241 static void
   1242 ahc_probe_ext_scbram(struct ahc_softc *ahc)
   1243 {
   1244 	int num_scbs;
   1245 	int test_num_scbs;
   1246 	int enable;
   1247 	int pcheck;
   1248 	int fast;
   1249 	int large;
   1250 
   1251 	enable = FALSE;
   1252 	pcheck = FALSE;
   1253 	fast = FALSE;
   1254 	large = FALSE;
   1255 	num_scbs = 0;
   1256 
   1257 	if (ahc_ext_scbram_present(ahc) == 0)
   1258 		goto done;
   1259 
   1260 	/*
   1261 	 * Probe for the best parameters to use.
   1262 	 */
   1263 	ahc_scbram_config(ahc, /*enable*/TRUE, pcheck, fast, large);
   1264 	num_scbs = ahc_probe_scbs(ahc);
   1265 	if (num_scbs == 0) {
   1266 		/* The SRAM wasn't really present. */
   1267 		goto done;
   1268 	}
   1269 	enable = TRUE;
   1270 
   1271 	/*
   1272 	 * Clear any outstanding parity error
   1273 	 * and ensure that parity error reporting
   1274 	 * is enabled.
   1275 	 */
   1276 	ahc_outb(ahc, SEQCTL, 0);
   1277 	ahc_outb(ahc, CLRINT, CLRPARERR);
   1278 	ahc_outb(ahc, CLRINT, CLRBRKADRINT);
   1279 
   1280 	/* Now see if we can do parity */
   1281 	ahc_scbram_config(ahc, enable, /*pcheck*/TRUE, fast, large);
   1282 	num_scbs = ahc_probe_scbs(ahc);
   1283 	if ((ahc_inb(ahc, INTSTAT) & BRKADRINT) == 0
   1284 	 || (ahc_inb(ahc, ERROR) & MPARERR) == 0)
   1285 		pcheck = TRUE;
   1286 
   1287 	/* Clear any resulting parity error */
   1288 	ahc_outb(ahc, CLRINT, CLRPARERR);
   1289 	ahc_outb(ahc, CLRINT, CLRBRKADRINT);
   1290 
   1291 	/* Now see if we can do fast timing */
   1292 	ahc_scbram_config(ahc, enable, pcheck, /*fast*/TRUE, large);
   1293 	test_num_scbs = ahc_probe_scbs(ahc);
   1294 	if (test_num_scbs == num_scbs
   1295 	 && ((ahc_inb(ahc, INTSTAT) & BRKADRINT) == 0
   1296 	  || (ahc_inb(ahc, ERROR) & MPARERR) == 0))
   1297 		fast = TRUE;
   1298 
   1299 	/*
   1300 	 * See if we can use large SCBs and still maintain
   1301 	 * the same overall count of SCBs.
   1302 	 */
   1303 	if ((ahc->features & AHC_LARGE_SCBS) != 0) {
   1304 		ahc_scbram_config(ahc, enable, pcheck, fast, /*large*/TRUE);
   1305 		test_num_scbs = ahc_probe_scbs(ahc);
   1306 		if (test_num_scbs >= num_scbs) {
   1307 			large = TRUE;
   1308 			num_scbs = test_num_scbs;
   1309 	 		if (num_scbs >= 64) {
   1310 				/*
   1311 				 * We have enough space to move the
   1312 				 * "busy targets table" into SCB space
   1313 				 * and make it qualify all the way to the
   1314 				 * lun level.
   1315 				 */
   1316 				ahc->flags |= AHC_SCB_BTT;
   1317 			}
   1318 		}
   1319 	}
   1320 done:
   1321 	/*
   1322 	 * Disable parity error reporting until we
   1323 	 * can load instruction ram.
   1324 	 */
   1325 	ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS);
   1326 	/* Clear any latched parity error */
   1327 	ahc_outb(ahc, CLRINT, CLRPARERR);
   1328 	ahc_outb(ahc, CLRINT, CLRBRKADRINT);
   1329 	if (1/*bootverbose*/ && enable) {
   1330 		printf("%s: External SRAM, %s access%s, %dbytes/SCB\n",
   1331 		       ahc_name(ahc), fast ? "fast" : "slow",
   1332 		       pcheck ? ", parity checking enabled" : "",
   1333 		       large ? 64 : 32);
   1334 	}
   1335 	ahc_scbram_config(ahc, enable, pcheck, fast, large);
   1336 }
   1337 
   1338 #if 0
   1339 /*
   1340  * Perform some simple tests that should catch situations where
   1341  * our registers are invalidly mapped.
   1342  */
   1343 static int
   1344 ahc_pci_test_register_access(struct ahc_softc *ahc)
   1345 {
   1346 	int	 error;
   1347 	u_int	 status1;
   1348 	uint32_t cmd;
   1349 	uint8_t	 hcntrl;
   1350 
   1351 	error = EIO;
   1352 
   1353 	/*
   1354 	 * Enable PCI error interrupt status, but suppress NMIs
   1355 	 * generated by SERR raised due to target aborts.
   1356 	 */
   1357 	cmd = pci_conf_read(ahc->bd->pc, ahc->bd->tag, PCIR_COMMAND);
   1358 	pci_conf_write(ahc->bd->pc, ahc->bd->tag, PCIR_COMMAND,
   1359 		       cmd & ~PCIM_CMD_SERRESPEN);
   1360 
   1361 	/*
   1362 	 * First a simple test to see if any
   1363 	 * registers can be read.  Reading
   1364 	 * HCNTRL has no side effects and has
   1365 	 * at least one bit that is guaranteed to
   1366 	 * be zero so it is a good register to
   1367 	 * use for this test.
   1368 	 */
   1369 	hcntrl = ahc_inb(ahc, HCNTRL);
   1370 	if (hcntrl == 0xFF)
   1371 		goto fail;
   1372 
   1373 	/*
   1374 	 * Next create a situation where write combining
   1375 	 * or read prefetching could be initiated by the
   1376 	 * CPU or host bridge.  Our device does not support
   1377 	 * either, so look for data corruption and/or flagged
   1378 	 * PCI errors.
   1379 	 */
   1380 	ahc_outb(ahc, HCNTRL, hcntrl|PAUSE);
   1381 	while (ahc_is_paused(ahc) == 0)
   1382 		;
   1383 	ahc_outb(ahc, SEQCTL, PERRORDIS);
   1384 	ahc_outb(ahc, SCBPTR, 0);
   1385 	ahc_outl(ahc, SCB_BASE, 0x5aa555aa);
   1386 	if (ahc_inl(ahc, SCB_BASE) != 0x5aa555aa)
   1387 		goto fail;
   1388 
   1389 	status1 = pci_conf_read(ahc->bd->pc, ahc->bd->tag,
   1390 				PCI_COMMAND_STATUS_REG + 1);
   1391 	if ((status1 & STA) != 0)
   1392 		goto fail;
   1393 
   1394 	error = 0;
   1395 
   1396 fail:
   1397 	/* Silently clear any latched errors. */
   1398 	status1 = pci_conf_read(ahc->bd->pc, ahc->bd->tag,
   1399 	    PCI_COMMAND_STATUS_REG + 1);
   1400 	ahc_pci_write_config(ahc->dev_softc, PCIR_STATUS + 1,
   1401 			     status1, /*bytes*/1);
   1402 	ahc_outb(ahc, CLRINT, CLRPARERR);
   1403 	ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS);
   1404 	ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, cmd, /*bytes*/2);
   1405 	return (error);
   1406 }
   1407 #endif
   1408 
   1409 static void
   1410 ahc_pci_intr(struct ahc_softc *ahc)
   1411 {
   1412 	u_int error;
   1413 	u_int status1;
   1414 
   1415 	error = ahc_inb(ahc, ERROR);
   1416 	if ((error & PCIERRSTAT) == 0)
   1417 		return;
   1418 
   1419 	status1 = pci_conf_read(ahc->bd->pc, ahc->bd->tag,
   1420 	    PCI_COMMAND_STATUS_REG);
   1421 
   1422 	printf("%s: PCI error Interrupt at seqaddr = 0x%x\n",
   1423 	      ahc_name(ahc),
   1424 	      ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8));
   1425 
   1426 	if (status1 & DPE) {
   1427 		printf("%s: Data Parity Error Detected during address "
   1428 		       "or write data phase\n", ahc_name(ahc));
   1429 	}
   1430 	if (status1 & SSE) {
   1431 		printf("%s: Signal System Error Detected\n", ahc_name(ahc));
   1432 	}
   1433 	if (status1 & RMA) {
   1434 		printf("%s: Received a Master Abort\n", ahc_name(ahc));
   1435 	}
   1436 	if (status1 & RTA) {
   1437 		printf("%s: Received a Target Abort\n", ahc_name(ahc));
   1438 	}
   1439 	if (status1 & STA) {
   1440 		printf("%s: Signaled a Target Abort\n", ahc_name(ahc));
   1441 	}
   1442 	if (status1 & DPR) {
   1443 		printf("%s: Data Parity Error has been reported via PERR#\n",
   1444 		       ahc_name(ahc));
   1445 	}
   1446 
   1447 	/* Clear latched errors. */
   1448 	pci_conf_write(ahc->bd->pc, ahc->bd->tag,  PCI_COMMAND_STATUS_REG,
   1449 	    status1);
   1450 
   1451 	if ((status1 & (DPE|SSE|RMA|RTA|STA|DPR)) == 0) {
   1452 		printf("%s: Latched PCIERR interrupt with "
   1453 		       "no status bits set\n", ahc_name(ahc));
   1454 	} else {
   1455 		ahc_outb(ahc, CLRINT, CLRPARERR);
   1456 	}
   1457 
   1458 	ahc_unpause(ahc);
   1459 }
   1460 
   1461 static int
   1462 ahc_aic785X_setup(struct ahc_softc *ahc)
   1463 {
   1464 	uint8_t rev;
   1465 
   1466 	ahc->channel = 'A';
   1467 	ahc->chip = AHC_AIC7850;
   1468 	ahc->features = AHC_AIC7850_FE;
   1469 	ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
   1470 	rev = PCI_REVISION(ahc->bd->class);
   1471 	if (rev >= 1)
   1472 		ahc->bugs |= AHC_PCI_2_1_RETRY_BUG;
   1473 	return (0);
   1474 }
   1475 
   1476 static int
   1477 ahc_aic7860_setup(struct ahc_softc *ahc)
   1478 {
   1479 	uint8_t rev;
   1480 
   1481 	ahc->channel = 'A';
   1482 	ahc->chip = AHC_AIC7860;
   1483 	ahc->features = AHC_AIC7860_FE;
   1484 	ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
   1485 	rev = PCI_REVISION(ahc->bd->class);
   1486 	if (rev >= 1)
   1487 		ahc->bugs |= AHC_PCI_2_1_RETRY_BUG;
   1488 	return (0);
   1489 }
   1490 
   1491 static int
   1492 ahc_apa1480_setup(struct ahc_softc *ahc)
   1493 {
   1494 	int error;
   1495 
   1496 	error = ahc_aic7860_setup(ahc);
   1497 	if (error != 0)
   1498 		return (error);
   1499 	ahc->features |= AHC_REMOVABLE;
   1500 	return (0);
   1501 }
   1502 
   1503 static int
   1504 ahc_aic7870_setup(struct ahc_softc *ahc)
   1505 {
   1506 
   1507 	ahc->channel = 'A';
   1508 	ahc->chip = AHC_AIC7870;
   1509 	ahc->features = AHC_AIC7870_FE;
   1510 	ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
   1511 	return (0);
   1512 }
   1513 
   1514 static int
   1515 ahc_aha394X_setup(struct ahc_softc *ahc)
   1516 {
   1517 	int error;
   1518 
   1519 	error = ahc_aic7870_setup(ahc);
   1520 	if (error == 0)
   1521 		error = ahc_aha394XX_setup(ahc);
   1522 	return (error);
   1523 }
   1524 
   1525 static int
   1526 ahc_aha398X_setup(struct ahc_softc *ahc)
   1527 {
   1528 	int error;
   1529 
   1530 	error = ahc_aic7870_setup(ahc);
   1531 	if (error == 0)
   1532 		error = ahc_aha398XX_setup(ahc);
   1533 	return (error);
   1534 }
   1535 
   1536 static int
   1537 ahc_aha494X_setup(struct ahc_softc *ahc)
   1538 {
   1539 	int error;
   1540 
   1541 	error = ahc_aic7870_setup(ahc);
   1542 	if (error == 0)
   1543 		error = ahc_aha494XX_setup(ahc);
   1544 	return (error);
   1545 }
   1546 
   1547 static int
   1548 ahc_aic7880_setup(struct ahc_softc *ahc)
   1549 {
   1550 	uint8_t rev;
   1551 
   1552 	ahc->channel = 'A';
   1553 	ahc->chip = AHC_AIC7880;
   1554 	ahc->features = AHC_AIC7880_FE;
   1555 	ahc->bugs |= AHC_TMODE_WIDEODD_BUG;
   1556 	rev = PCI_REVISION(ahc->bd->class);
   1557 	if (rev >= 1) {
   1558 		ahc->bugs |= AHC_PCI_2_1_RETRY_BUG;
   1559 	} else {
   1560 		ahc->bugs |= AHC_CACHETHEN_BUG|AHC_PCI_MWI_BUG;
   1561 	}
   1562 	return (0);
   1563 }
   1564 
   1565 static int
   1566 ahc_aha2940Pro_setup(struct ahc_softc *ahc)
   1567 {
   1568 
   1569 	ahc->flags |= AHC_INT50_SPEEDFLEX;
   1570 	return (ahc_aic7880_setup(ahc));
   1571 }
   1572 
   1573 static int
   1574 ahc_aha394XU_setup(struct ahc_softc *ahc)
   1575 {
   1576 	int error;
   1577 
   1578 	error = ahc_aic7880_setup(ahc);
   1579 	if (error == 0)
   1580 		error = ahc_aha394XX_setup(ahc);
   1581 	return (error);
   1582 }
   1583 
   1584 static int
   1585 ahc_aha398XU_setup(struct ahc_softc *ahc)
   1586 {
   1587 	int error;
   1588 
   1589 	error = ahc_aic7880_setup(ahc);
   1590 	if (error == 0)
   1591 		error = ahc_aha398XX_setup(ahc);
   1592 	return (error);
   1593 }
   1594 
   1595 static int
   1596 ahc_aic7890_setup(struct ahc_softc *ahc)
   1597 {
   1598 	uint8_t rev;
   1599 
   1600 	ahc->channel = 'A';
   1601 	ahc->chip = AHC_AIC7890;
   1602 	ahc->features = AHC_AIC7890_FE;
   1603 	ahc->flags |= AHC_NEWEEPROM_FMT;
   1604 	rev = PCI_REVISION(ahc->bd->class);
   1605 	if (rev == 0)
   1606 		ahc->bugs |= AHC_AUTOFLUSH_BUG|AHC_CACHETHEN_BUG;
   1607 	return (0);
   1608 }
   1609 
   1610 static int
   1611 ahc_aic7892_setup(struct ahc_softc *ahc)
   1612 {
   1613 
   1614 	ahc->channel = 'A';
   1615 	ahc->chip = AHC_AIC7892;
   1616 	ahc->features = AHC_AIC7892_FE;
   1617 	ahc->flags |= AHC_NEWEEPROM_FMT;
   1618 	ahc->bugs |= AHC_SCBCHAN_UPLOAD_BUG;
   1619 	return (0);
   1620 }
   1621 
   1622 static int
   1623 ahc_aic7895_setup(struct ahc_softc *ahc)
   1624 {
   1625 	uint8_t rev;
   1626 
   1627 	ahc->channel = (ahc->bd->func == 1) ? 'B' : 'A';
   1628 	/*
   1629 	 * The 'C' revision of the aic7895 has a few additional features.
   1630 	 */
   1631 	rev = PCI_REVISION(ahc->bd->class);
   1632 	if (rev >= 4) {
   1633 		ahc->chip = AHC_AIC7895C;
   1634 		ahc->features = AHC_AIC7895C_FE;
   1635 	} else  {
   1636 		u_int command;
   1637 
   1638 		ahc->chip = AHC_AIC7895;
   1639 		ahc->features = AHC_AIC7895_FE;
   1640 
   1641 		/*
   1642 		 * The BIOS disables the use of MWI transactions
   1643 		 * since it does not have the MWI bug work around
   1644 		 * we have.  Disabling MWI reduces performance, so
   1645 		 * turn it on again.
   1646 		 */
   1647 		command = pci_conf_read(ahc->bd->pc, ahc->bd->tag,
   1648 		    PCI_COMMAND_STATUS_REG);
   1649 		command |=  PCI_COMMAND_INVALIDATE_ENABLE;
   1650 		pci_conf_write(ahc->bd->pc, ahc->bd->tag,
   1651 		    PCI_COMMAND_STATUS_REG, command);
   1652 		ahc->bugs |= AHC_PCI_MWI_BUG;
   1653 	}
   1654 	/*
   1655 	 * XXX Does CACHETHEN really not work???  What about PCI retry?
   1656 	 * on C level chips.  Need to test, but for now, play it safe.
   1657 	 */
   1658 	ahc->bugs |= AHC_TMODE_WIDEODD_BUG|AHC_PCI_2_1_RETRY_BUG
   1659 		  |  AHC_CACHETHEN_BUG;
   1660 
   1661 #if 0
   1662 	uint32_t devconfig;
   1663 
   1664 	/*
   1665 	 * Cachesize must also be zero due to stray DAC
   1666 	 * problem when sitting behind some bridges.
   1667 	 */
   1668 	pci_conf_write(ahc->bd->pc, ahc->bd->tag, CSIZE_LATTIME, 0);
   1669 	devconfig = pci_conf_read(ahc->bd->pc, ahc->bd->tag, DEVCONFIG);
   1670 	devconfig |= MRDCEN;
   1671 	pci_conf_write(ahc->bd->pc, ahc->bd->tag, DEVCONFIG, devconfig);
   1672 #endif
   1673 	ahc->flags |= AHC_NEWEEPROM_FMT;
   1674 	return (0);
   1675 }
   1676 
   1677 static int
   1678 ahc_aic7896_setup(struct ahc_softc *ahc)
   1679 {
   1680 	ahc->channel = (ahc->bd->func == 1) ? 'B' : 'A';
   1681 	ahc->chip = AHC_AIC7896;
   1682 	ahc->features = AHC_AIC7896_FE;
   1683 	ahc->flags |= AHC_NEWEEPROM_FMT;
   1684 	ahc->bugs |= AHC_CACHETHEN_DIS_BUG;
   1685 	return (0);
   1686 }
   1687 
   1688 static int
   1689 ahc_aic7899_setup(struct ahc_softc *ahc)
   1690 {
   1691 	ahc->channel = (ahc->bd->func == 1) ? 'B' : 'A';
   1692 	ahc->chip = AHC_AIC7899;
   1693 	ahc->features = AHC_AIC7899_FE;
   1694 	ahc->flags |= AHC_NEWEEPROM_FMT;
   1695 	ahc->bugs |= AHC_SCBCHAN_UPLOAD_BUG;
   1696 	return (0);
   1697 }
   1698 
   1699 static int
   1700 ahc_aha29160C_setup(struct ahc_softc *ahc)
   1701 {
   1702 	int error;
   1703 
   1704 	error = ahc_aic7899_setup(ahc);
   1705 	if (error != 0)
   1706 		return (error);
   1707 	ahc->features |= AHC_REMOVABLE;
   1708 	return (0);
   1709 }
   1710 
   1711 static int
   1712 ahc_raid_setup(struct ahc_softc *ahc)
   1713 {
   1714 	aprint_normal_dev(ahc->sc_dev, "RAID functionality unsupported\n");
   1715 	return (ENXIO);
   1716 }
   1717 
   1718 static int
   1719 ahc_aha394XX_setup(struct ahc_softc *ahc)
   1720 {
   1721 
   1722 	switch (ahc->bd->dev) {
   1723 	case AHC_394X_SLOT_CHANNEL_A:
   1724 		ahc->channel = 'A';
   1725 		break;
   1726 	case AHC_394X_SLOT_CHANNEL_B:
   1727 		ahc->channel = 'B';
   1728 		break;
   1729 	default:
   1730 		printf("adapter at unexpected slot %d\n"
   1731 		       "unable to map to a channel\n",
   1732 		       ahc->bd->dev);
   1733 		ahc->channel = 'A';
   1734 	}
   1735 	return (0);
   1736 }
   1737 
   1738 static int
   1739 ahc_aha398XX_setup(struct ahc_softc *ahc)
   1740 {
   1741 
   1742 	switch (ahc->bd->dev) {
   1743 	case AHC_398X_SLOT_CHANNEL_A:
   1744 		ahc->channel = 'A';
   1745 		break;
   1746 	case AHC_398X_SLOT_CHANNEL_B:
   1747 		ahc->channel = 'B';
   1748 		break;
   1749 	case AHC_398X_SLOT_CHANNEL_C:
   1750 		ahc->channel = 'C';
   1751 		break;
   1752 	default:
   1753 		printf("adapter at unexpected slot %d\n"
   1754 		       "unable to map to a channel\n",
   1755 		       ahc->bd->dev);
   1756 		ahc->channel = 'A';
   1757 		break;
   1758 	}
   1759 	ahc->flags |= AHC_LARGE_SEEPROM;
   1760 	return (0);
   1761 }
   1762 
   1763 static int
   1764 ahc_aha494XX_setup(struct ahc_softc *ahc)
   1765 {
   1766 
   1767 	switch (ahc->bd->dev) {
   1768 	case AHC_494X_SLOT_CHANNEL_A:
   1769 		ahc->channel = 'A';
   1770 		break;
   1771 	case AHC_494X_SLOT_CHANNEL_B:
   1772 		ahc->channel = 'B';
   1773 		break;
   1774 	case AHC_494X_SLOT_CHANNEL_C:
   1775 		ahc->channel = 'C';
   1776 		break;
   1777 	case AHC_494X_SLOT_CHANNEL_D:
   1778 		ahc->channel = 'D';
   1779 		break;
   1780 	default:
   1781 		printf("adapter at unexpected slot %d\n"
   1782 		       "unable to map to a channel\n",
   1783 		       ahc->bd->dev);
   1784 		ahc->channel = 'A';
   1785 	}
   1786 	ahc->flags |= AHC_LARGE_SEEPROM;
   1787 	return (0);
   1788 }
   1789