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vrpciu.c revision 1.16
      1 /*	$NetBSD: vrpciu.c,v 1.16 2004/12/12 21:03:06 abs Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 Enami Tsugutomo.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: vrpciu.c,v 1.16 2004/12/12 21:03:06 abs Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/systm.h>
     34 #include <sys/device.h>
     35 
     36 #include <machine/bus.h>
     37 #include <machine/bus_space_hpcmips.h>
     38 #include <machine/bus_dma_hpcmips.h>
     39 #include <machine/config_hook.h>
     40 #include <machine/platid.h>
     41 #include <machine/platid_mask.h>
     42 
     43 #include <dev/pci/pcivar.h>
     44 #include <dev/pci/pcidevs.h>
     45 #include <dev/pci/pciidereg.h>
     46 
     47 #include <hpcmips/vr/icureg.h>
     48 #include <hpcmips/vr/vripif.h>
     49 #include <hpcmips/vr/vrpciureg.h>
     50 
     51 #include "pci.h"
     52 
     53 #ifdef DEBUG
     54 #define	DPRINTF(args)	printf args
     55 #else
     56 #define	DPRINTF(args)
     57 #endif
     58 
     59 struct vrpciu_softc {
     60 	struct device sc_dev;
     61 
     62 	vrip_chipset_tag_t sc_vc;
     63 	bus_space_tag_t sc_iot;
     64 	bus_space_handle_t sc_ioh;
     65 	void *sc_ih;
     66 
     67 	struct vrc4173bcu_softc *sc_bcu; /* vrc4173bcu */
     68 
     69 	struct hpcmips_pci_chipset sc_pc;
     70 };
     71 
     72 static void	vrpciu_write(struct vrpciu_softc *, int, u_int32_t);
     73 static u_int32_t
     74 		vrpciu_read(struct vrpciu_softc *, int);
     75 #ifdef DEBUG
     76 static void	vrpciu_write_2(struct vrpciu_softc *, int, u_int16_t)
     77 	__attribute__((unused));
     78 static u_int16_t
     79 		vrpciu_read_2(struct vrpciu_softc *, int);
     80 #endif
     81 static int	vrpciu_match(struct device *, struct cfdata *, void *);
     82 static void	vrpciu_attach(struct device *, struct device *, void *);
     83 static int	vrpciu_intr(void *);
     84 static void	vrpciu_attach_hook(struct device *, struct device *,
     85 		    struct pcibus_attach_args *);
     86 static int	vrpciu_bus_maxdevs(pci_chipset_tag_t, int);
     87 static int	vrpciu_bus_devorder(pci_chipset_tag_t, int, char *);
     88 static pcitag_t	vrpciu_make_tag(pci_chipset_tag_t, int, int, int);
     89 static void	vrpciu_decompose_tag(pci_chipset_tag_t, pcitag_t, int *, int *,
     90 		    int *);
     91 static pcireg_t	vrpciu_conf_read(pci_chipset_tag_t, pcitag_t, int);
     92 static void	vrpciu_conf_write(pci_chipset_tag_t, pcitag_t, int, pcireg_t);
     93 static int	vrpciu_intr_map(struct pci_attach_args *, pci_intr_handle_t *);
     94 static const char *vrpciu_intr_string(pci_chipset_tag_t, pci_intr_handle_t);
     95 static const struct evcnt *vrpciu_intr_evcnt(pci_chipset_tag_t,
     96 		    pci_intr_handle_t);
     97 static void	*vrpciu_intr_establish(pci_chipset_tag_t, pci_intr_handle_t,
     98 		    int, int (*)(void *), void *);
     99 static void	vrpciu_intr_disestablish(pci_chipset_tag_t, void *);
    100 
    101 CFATTACH_DECL(vrpciu, sizeof(struct vrpciu_softc),
    102     vrpciu_match, vrpciu_attach, NULL, NULL);
    103 
    104 static void
    105 vrpciu_write(struct vrpciu_softc *sc, int offset, u_int32_t val)
    106 {
    107 
    108 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, offset, val);
    109 }
    110 
    111 static u_int32_t
    112 vrpciu_read(struct vrpciu_softc *sc, int offset)
    113 {
    114 
    115 	return (bus_space_read_4(sc->sc_iot, sc->sc_ioh, offset));
    116 }
    117 
    118 #ifdef DEBUG
    119 static void
    120 vrpciu_write_2(struct vrpciu_softc *sc, int offset, u_int16_t val)
    121 {
    122 
    123 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, offset, val);
    124 }
    125 
    126 static u_int16_t
    127 vrpciu_read_2(struct vrpciu_softc *sc, int offset)
    128 {
    129 
    130 	return (bus_space_read_2(sc->sc_iot, sc->sc_ioh, offset));
    131 }
    132 #endif
    133 
    134 static int
    135 vrpciu_match(struct device *parent, struct cfdata *match, void *aux)
    136 {
    137 
    138 	return (1);
    139 }
    140 
    141 static void
    142 vrpciu_attach(struct device *parent, struct device *self, void *aux)
    143 {
    144 	struct vrpciu_softc *sc = (struct vrpciu_softc *)self;
    145 	pci_chipset_tag_t pc = &sc->sc_pc;
    146 	struct vrip_attach_args *va = aux;
    147 #if defined(DEBUG) || NPCI > 0
    148 	u_int32_t reg;
    149 #endif
    150 #if NPCI > 0
    151 	struct bus_space_tag_hpcmips *iot;
    152 	char tmpbuf[16];
    153 	struct pcibus_attach_args pba;
    154 #endif
    155 
    156 	sc->sc_vc = va->va_vc;
    157 	sc->sc_iot = va->va_iot;
    158 	if (bus_space_map(sc->sc_iot, va->va_addr, va->va_size, 0,
    159 	    &sc->sc_ioh)) {
    160 		printf(": couldn't map io space\n");
    161 		return;
    162 	}
    163 
    164 	sc->sc_ih = vrip_intr_establish(va->va_vc, va->va_unit, 0, IPL_TTY,
    165 	    vrpciu_intr, sc);
    166 	if (sc->sc_ih == NULL) {
    167 		printf(": couldn't establish interrupt\n");
    168 		return;
    169 	}
    170 
    171 	/* Enable level 2 interrupt */
    172 	vrip_intr_setmask2(va->va_vc, sc->sc_ih, PCIINT_INT0, 1);
    173 
    174 	printf("\n");
    175 
    176 #ifdef DEBUG
    177 #define	DUMP_MAW(sc, name, reg) do {					\
    178 	printf("%s: %s =\t0x%08x\n", (sc)->sc_dev.dv_xname,		\
    179 	    (name), (reg));						\
    180 	printf("%s:\tIBA/MASK =\t0x%08x/0x%08x (0x%08x - 0x%08x)\n",	\
    181 	    (sc)->sc_dev.dv_xname,					\
    182 	    reg & VRPCIU_MAW_IBAMASK, VRPCIU_MAW_ADDRMASK(reg),		\
    183 	    VRPCIU_MAW_ADDR(reg),					\
    184 	    VRPCIU_MAW_ADDR(reg) + VRPCIU_MAW_SIZE(reg));		\
    185 	printf("%s:\tWINEN =\t0x%08x\n", (sc)->sc_dev.dv_xname,		\
    186 	    reg & VRPCIU_MAW_WINEN);					\
    187 	printf("%s:\tPCIADR =\t0x%08x\n", (sc)->sc_dev.dv_xname,	\
    188 	    VRPCIU_MAW_PCIADDR(reg));					\
    189 } while (0)
    190 #define	DUMP_TAW(sc, name, reg) do {				\
    191 	printf("%s: %s =\t\t0x%08x\n", (sc)->sc_dev.dv_xname,	\
    192 	    (name), (reg));					\
    193 	printf("%s:\tMASK =\t0x%08x\n", (sc)->sc_dev.dv_xname,	\
    194 	    VRPCIU_TAW_ADDRMASK(reg));				\
    195 	printf("%s:\tWINEN =\t0x%08x\n", (sc)->sc_dev.dv_xname,	\
    196 	    reg & VRPCIU_TAW_WINEN);				\
    197 	printf("%s:\tIBA =\t0x%08x\n", (sc)->sc_dev.dv_xname,	\
    198 	    VRPCIU_TAW_IBA(reg));				\
    199 } while (0)
    200 	reg = vrpciu_read(sc, VRPCIU_MMAW1REG);
    201 	DUMP_MAW(sc, "MMAW1", reg);
    202 	reg = vrpciu_read(sc, VRPCIU_MMAW2REG);
    203 	DUMP_MAW(sc, "MMAW2", reg);
    204 	reg = vrpciu_read(sc, VRPCIU_TAW1REG);
    205 	DUMP_TAW(sc, "TAW1", reg);
    206 	reg = vrpciu_read(sc, VRPCIU_TAW2REG);
    207 	DUMP_TAW(sc, "TAW2", reg);
    208 	reg = vrpciu_read(sc, VRPCIU_MIOAWREG);
    209 	DUMP_MAW(sc, "MIOAW", reg);
    210 	printf("%s: BUSERRAD =\t0x%08x\n", sc->sc_dev.dv_xname,
    211 	    vrpciu_read(sc, VRPCIU_BUSERRADREG));
    212 	printf("%s: INTCNTSTA =\t0x%08x\n", sc->sc_dev.dv_xname,
    213 	    vrpciu_read(sc, VRPCIU_INTCNTSTAREG));
    214 	printf("%s: EXACC =\t0x%08x\n", sc->sc_dev.dv_xname,
    215 	    vrpciu_read(sc, VRPCIU_EXACCREG));
    216 	printf("%s: RECONT =\t0x%08x\n", sc->sc_dev.dv_xname,
    217 	    vrpciu_read(sc, VRPCIU_RECONTREG));
    218 	printf("%s: PCIEN =\t0x%08x\n", sc->sc_dev.dv_xname,
    219 	    vrpciu_read(sc, VRPCIU_ENREG));
    220 	printf("%s: CLOCKSEL =\t0x%08x\n", sc->sc_dev.dv_xname,
    221 	    vrpciu_read(sc, VRPCIU_CLKSELREG));
    222 	printf("%s: TRDYV =\t0x%08x\n", sc->sc_dev.dv_xname,
    223 	    vrpciu_read(sc, VRPCIU_TRDYVREG));
    224 	printf("%s: CLKRUN =\t0x%08x\n", sc->sc_dev.dv_xname,
    225 	    vrpciu_read_2(sc, VRPCIU_CLKRUNREG));
    226 	printf("%s: IDREG =\t0x%08x\n", sc->sc_dev.dv_xname,
    227 	    vrpciu_read(sc, VRPCIU_CONF_BASE + PCI_ID_REG));
    228 	reg = vrpciu_read(sc, VRPCIU_CONF_BASE + PCI_COMMAND_STATUS_REG);
    229 	printf("%s: CSR =\t\t0x%08x\n", sc->sc_dev.dv_xname, reg);
    230 	vrpciu_write(sc, VRPCIU_CONF_BASE + PCI_COMMAND_STATUS_REG, reg);
    231 	printf("%s: CSR =\t\t0x%08x\n", sc->sc_dev.dv_xname,
    232 	    vrpciu_read(sc, VRPCIU_CONF_BASE + PCI_COMMAND_STATUS_REG));
    233 	printf("%s: CLASS =\t0x%08x\n", sc->sc_dev.dv_xname,
    234 	    vrpciu_read(sc, VRPCIU_CONF_BASE + PCI_CLASS_REG));
    235 	printf("%s: BHLC =\t\t0x%08x\n", sc->sc_dev.dv_xname,
    236 	    vrpciu_read(sc, VRPCIU_CONF_BASE + PCI_BHLC_REG));
    237 	printf("%s: MAIL =\t\t0x%08x\n", sc->sc_dev.dv_xname,
    238 	    vrpciu_read(sc, VRPCIU_CONF_BASE + VRPCIU_CONF_MAILREG));
    239 	printf("%s: MBA1 =\t\t0x%08x\n", sc->sc_dev.dv_xname,
    240 	    vrpciu_read(sc, VRPCIU_CONF_BASE + VRPCIU_CONF_MBA1REG));
    241 	printf("%s: MBA2 =\t\t0x%08x\n", sc->sc_dev.dv_xname,
    242 	    vrpciu_read(sc, VRPCIU_CONF_BASE + VRPCIU_CONF_MBA2REG));
    243 	printf("%s: INTR =\t\t0x%08x\n", sc->sc_dev.dv_xname,
    244 	    vrpciu_read(sc, VRPCIU_CONF_BASE + PCI_INTERRUPT_REG));
    245 #if 0
    246 	vrpciu_write(sc, VRPCIU_CONF_BASE + PCI_INTERRUPT_REG,
    247 	    vrpciu_read(sc, VRPCIU_CONF_BASE + PCI_INTERRUPT_REG) | 0x01);
    248 	printf("%s: INTR =\t\t0x%08x\n", sc->sc_dev.dv_xname,
    249 	    vrpciu_read(sc, VRPCIU_CONF_BASE + PCI_INTERRUPT_REG));
    250 #endif
    251 #endif
    252 
    253 	pc->pc_dev = &sc->sc_dev;
    254 	pc->pc_attach_hook = vrpciu_attach_hook;
    255 	pc->pc_bus_maxdevs = vrpciu_bus_maxdevs;
    256 	pc->pc_bus_devorder = vrpciu_bus_devorder;
    257 	pc->pc_make_tag = vrpciu_make_tag;
    258 	pc->pc_decompose_tag = vrpciu_decompose_tag;
    259 	pc->pc_conf_read = vrpciu_conf_read;
    260 	pc->pc_conf_write = vrpciu_conf_write;
    261 	pc->pc_intr_map = vrpciu_intr_map;
    262 	pc->pc_intr_string = vrpciu_intr_string;
    263 	pc->pc_intr_evcnt = vrpciu_intr_evcnt;
    264 	pc->pc_intr_establish = vrpciu_intr_establish;
    265 	pc->pc_intr_disestablish = vrpciu_intr_disestablish;
    266 
    267 #if 0
    268 	{
    269 		int i;
    270 
    271 		for (i = 0; i < 8; i++)
    272 			printf("%s: ID_REG(0, 0, %d) = 0x%08x\n",
    273 			    sc->sc_dev.dv_xname, i,
    274 			    pci_conf_read(pc, pci_make_tag(pc, 0, 0, i),
    275 				PCI_ID_REG));
    276 	}
    277 #endif
    278 
    279 #if NPCI > 0
    280 	memset(&pba, 0, sizeof(pba));
    281 
    282 	/* For now, just inherit window mappings set by WinCE.  XXX. */
    283 
    284 	iot = hpcmips_alloc_bus_space_tag();
    285 	reg = vrpciu_read(sc, VRPCIU_MIOAWREG);
    286 	snprintf(tmpbuf, sizeof(tmpbuf), "%s/iot",
    287 	    sc->sc_dev.dv_xname);
    288 	hpcmips_init_bus_space(iot, (struct bus_space_tag_hpcmips *)sc->sc_iot,
    289 	    tmpbuf, VRPCIU_MAW_ADDR(reg), VRPCIU_MAW_SIZE(reg));
    290 	pba.pba_iot = &iot->bst;
    291 
    292 	/*
    293 	 * Just use system bus space tag.  It works since WinCE maps
    294 	 * PCI bus space at same offset.  But this isn't right thing
    295 	 * of course.  XXX.
    296 	 */
    297 	pba.pba_memt = sc->sc_iot;
    298 	pba.pba_dmat = &hpcmips_default_bus_dma_tag.bdt;
    299 	pba.pba_dmat64 = NULL;
    300 	pba.pba_bus = 0;
    301 	pba.pba_bridgetag = NULL;
    302 
    303 	if (platid_match(&platid, &platid_mask_MACH_LASER5_L_BOARD)) {
    304 		/*
    305 		 * fix PCI device configuration for L-Router.
    306 		 */
    307 		/* change IDE controller to native mode */
    308 		reg = pci_conf_read(pc, pci_make_tag(pc, 0, 16, 0),
    309 				    PCI_CLASS_REG);
    310 		reg |= PCIIDE_INTERFACE_PCI(0) << PCI_INTERFACE_SHIFT;
    311 		reg |= PCIIDE_INTERFACE_PCI(1) << PCI_INTERFACE_SHIFT;
    312 		pci_conf_write(pc, pci_make_tag(pc, 0, 16, 0), PCI_CLASS_REG,
    313 			       reg);
    314 		/* fix broken BAR setting of fxp0, fxp1 */
    315 		pci_conf_write(pc, pci_make_tag(pc, 0, 0, 0), PCI_MAPREG_START,
    316 			       0x11100000);
    317 		pci_conf_write(pc, pci_make_tag(pc, 0, 1, 0), PCI_MAPREG_START,
    318 			       0x11200000);
    319 	}
    320 
    321 	pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED |
    322 	    PCI_FLAGS_MRL_OKAY;
    323 	pba.pba_pc = pc;
    324 
    325 	config_found_ia(self, "pcibus", &pba, pcibusprint);
    326 #endif
    327 }
    328 
    329 /*
    330  * Handle PCI error interrupts.
    331  */
    332 int
    333 vrpciu_intr(void *arg)
    334 {
    335 	struct vrpciu_softc *sc = (struct vrpciu_softc *)arg;
    336 	u_int32_t isr, baddr;
    337 
    338 	isr = vrpciu_read(sc, VRPCIU_INTCNTSTAREG);
    339 	baddr = vrpciu_read(sc, VRPCIU_BUSERRADREG);
    340 	printf("%s: status=0x%08x  bad addr=0x%08x\n",
    341 	    sc->sc_dev.dv_xname, isr, baddr);
    342 	return ((isr & 0x0f) ? 1 : 0);
    343 }
    344 
    345 void
    346 vrpciu_attach_hook(struct device *parent, struct device *self,
    347     struct pcibus_attach_args *pba)
    348 {
    349 
    350 	return;
    351 }
    352 
    353 int
    354 vrpciu_bus_maxdevs(pci_chipset_tag_t pc, int busno)
    355 {
    356 
    357 	return (32);
    358 }
    359 
    360 int
    361 vrpciu_bus_devorder(pci_chipset_tag_t pc, int busno, char *devs)
    362 {
    363 	int i, dev;
    364 	char priorities[32];
    365 	static pcireg_t ids[] = {
    366 		/* these devices should be attached first */
    367 		PCI_ID_CODE(PCI_VENDOR_NEC, PCI_PRODUCT_NEC_VRC4173_BCU),
    368 	};
    369 
    370 	/* scan PCI devices and check the id table */
    371 	memset(priorities, 0, sizeof(priorities));
    372 	for (dev = 0; dev < 32; dev++) {
    373 		pcireg_t id;
    374 		id = pci_conf_read(pc, pci_make_tag(pc, 0, dev, 0),PCI_ID_REG);
    375 		for (i = 0; i < sizeof(ids)/sizeof(*ids); i++)
    376 			if (id == ids[i])
    377 				priorities[dev] = 1;
    378 	}
    379 
    380 	/* fill order array */
    381 	for (i = 1; 0 <= i; i--)
    382 		for (dev = 0; dev < 32; dev++)
    383 			if (priorities[dev] == i)
    384 				*devs++ = dev;
    385 
    386 	return (32);
    387 }
    388 
    389 pcitag_t
    390 vrpciu_make_tag(pci_chipset_tag_t pc, int bus, int device, int function)
    391 {
    392 
    393 	return ((bus << 16) | (device << 11) | (function << 8));
    394 }
    395 
    396 void
    397 vrpciu_decompose_tag(pci_chipset_tag_t pc, pcitag_t tag, int *bp, int *dp,
    398     int *fp)
    399 {
    400 
    401 	if (bp != NULL)
    402 		*bp = (tag >> 16) & 0xff;
    403 	if (dp != NULL)
    404 		*dp = (tag >> 11) & 0x1f;
    405 	if (fp != NULL)
    406 		*fp = (tag >> 8) & 0x07;
    407 }
    408 
    409 pcireg_t
    410 vrpciu_conf_read(pci_chipset_tag_t pc, pcitag_t tag, int reg)
    411 {
    412 	struct vrpciu_softc *sc = (struct vrpciu_softc *)pc->pc_dev;
    413 	u_int32_t val;
    414 	int bus, device, function;
    415 
    416 	pci_decompose_tag(pc, tag, &bus, &device, &function);
    417 	if (bus == 0) {
    418 		if (device > 21)
    419 			return ((pcitag_t)-1);
    420 		tag = (1 << (device + 11)) | (function << 8); /* Type 0 */
    421 	} else
    422 		tag |= VRPCIU_CONF_TYPE1;
    423 
    424 	vrpciu_write(sc, VRPCIU_CONFAREG, tag | reg);
    425 	val = vrpciu_read(sc, VRPCIU_CONFDREG);
    426 #if 0
    427 	printf("%s: conf_read: tag = 0x%08x, reg = 0x%x, val = 0x%08x\n",
    428 	    sc->sc_dev.dv_xname, (u_int32_t)tag, reg, val);
    429 #endif
    430 	return (val);
    431 }
    432 
    433 void
    434 vrpciu_conf_write(pci_chipset_tag_t pc, pcitag_t tag, int reg,
    435     pcireg_t data)
    436 {
    437 	struct vrpciu_softc *sc = (struct vrpciu_softc *)pc->pc_dev;
    438 	int bus, device, function;
    439 
    440 #if 0
    441 	printf("%s: conf_write: tag = 0x%08x, reg = 0x%x, val = 0x%08x\n",
    442 	    sc->sc_dev.dv_xname, (u_int32_t)tag, reg, (u_int32_t)data);
    443 #endif
    444 	vrpciu_decompose_tag(pc, tag, &bus, &device, &function);
    445 	if (bus == 0) {
    446 		if (device > 21)
    447 			return;
    448 		tag = (1 << (device + 11)) | (function << 8); /* Type 0 */
    449 	} else
    450 		tag |= VRPCIU_CONF_TYPE1;
    451 
    452 	vrpciu_write(sc, VRPCIU_CONFAREG, tag | reg);
    453 	vrpciu_write(sc, VRPCIU_CONFDREG, data);
    454 }
    455 
    456 int
    457 vrpciu_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
    458 {
    459 	pci_chipset_tag_t pc = pa->pa_pc;
    460 	pcitag_t intrtag = pa->pa_intrtag;
    461 	int bus, dev, func;
    462 #ifdef DEBUG
    463 	int line = pa->pa_intrline;
    464 	int pin = pa->pa_intrpin;
    465 #endif
    466 
    467 	pci_decompose_tag(pc, intrtag, &bus, &dev, &func);
    468 	DPRINTF(("%s(%d, %d, %d): line = %d, pin = %d\n", pc->pc_dev->dv_xname,
    469 	    bus, dev, func, line, pin));
    470 
    471 	*ihp = CONFIG_HOOK_PCIINTR_ID(bus, dev, func);
    472 
    473 	return (0);
    474 }
    475 
    476 const char *
    477 vrpciu_intr_string(pci_chipset_tag_t pc, pci_intr_handle_t ih)
    478 {
    479 	static char irqstr[sizeof("pciintr") + 16];
    480 
    481 	snprintf(irqstr, sizeof(irqstr), "pciintr %d:%d:%d",
    482 	    CONFIG_HOOK_PCIINTR_BUS((int)ih),
    483 	    CONFIG_HOOK_PCIINTR_DEVICE((int)ih),
    484 	    CONFIG_HOOK_PCIINTR_FUNCTION((int)ih));
    485 
    486 	return (irqstr);
    487 }
    488 
    489 const struct evcnt *
    490 vrpciu_intr_evcnt(pci_chipset_tag_t pc, pci_intr_handle_t ih)
    491 {
    492 
    493 	/* XXX for now, no evcnt parent reported */
    494 
    495 	return (NULL);
    496 }
    497 
    498 void *
    499 vrpciu_intr_establish(pci_chipset_tag_t pc, pci_intr_handle_t ih, int level,
    500     int (*func)(void *), void *arg)
    501 {
    502 
    503 	if (ih == -1)
    504 		return (NULL);
    505 	DPRINTF(("vrpciu_intr_establish: %lx\n", ih));
    506 
    507 	return (config_hook(CONFIG_HOOK_PCIINTR, ih, CONFIG_HOOK_EXCLUSIVE,
    508 	    (int (*)(void *, int, long, void *))func, arg));
    509 }
    510 
    511 void
    512 vrpciu_intr_disestablish(pci_chipset_tag_t pc, void *cookie)
    513 {
    514 
    515 	DPRINTF(("vrpciu_intr_disestablish: %p\n", cookie));
    516 	config_unhook(cookie);
    517 }
    518