xref: /dragonfly/sys/bus/pci/pcivar.h (revision 4353aa4e)
1 /*-
2  * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice unmodified, this list of conditions, and the following
10  *    disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  *
26  * $FreeBSD: src/sys/dev/pci/pcivar.h,v 1.80.2.1.4.1 2009/04/15 03:14:26 kensmith Exp $
27  *
28  */
29 
30 #ifndef _PCIVAR_H_
31 #define	_PCIVAR_H_
32 
33 #ifndef _SYS_QUEUE_H_
34 #include <sys/queue.h>
35 #endif
36 
37 /* some PCI bus constants */
38 
39 #define	PCI_DOMAINMAX	65535	/* highest supported domain number */
40 #define	PCI_BUSMAX	255	/* highest supported bus number */
41 #define	PCI_SLOTMAX	31	/* highest supported slot number */
42 #define	PCI_FUNCMAX	7	/* highest supported function number */
43 #define	PCI_REGMAX	255	/* highest supported config register addr. */
44 
45 #define	PCI_MAXMAPS_0	6	/* max. no. of memory/port maps */
46 #define	PCI_MAXMAPS_1	2	/* max. no. of maps for PCI to PCI bridge */
47 #define	PCI_MAXMAPS_2	1	/* max. no. of maps for CardBus bridge */
48 
49 typedef uint64_t pci_addr_t;
50 
51 /* Interesting values for PCI power management */
52 struct pcicfg_pp {
53     uint16_t	pp_cap;		/* PCI power management capabilities */
54     uint8_t	pp_status;	/* config space address of PCI power status reg */
55     uint8_t	pp_pmcsr;	/* config space address of PMCSR reg */
56     uint8_t	pp_data;	/* config space address of PCI power data reg */
57 };
58 
59 struct vpd_readonly {
60     char	keyword[2];
61     char	*value;
62 };
63 
64 struct vpd_write {
65     char	keyword[2];
66     char	*value;
67     int 	start;
68     int 	len;
69 };
70 
71 struct pcicfg_vpd {
72     uint8_t	vpd_reg;	/* base register, + 2 for addr, + 4 data */
73     char	vpd_cached;
74     char	*vpd_ident;	/* string identifier */
75     int 	vpd_rocnt;
76     struct vpd_readonly *vpd_ros;
77     int 	vpd_wcnt;
78     struct vpd_write *vpd_w;
79 };
80 
81 /* Interesting values for PCI MSI */
82 struct pcicfg_msi {
83     uint16_t	msi_ctrl;	/* Message Control */
84     uint8_t	msi_location;	/* Offset of MSI capability registers. */
85     uint8_t	msi_msgnum;	/* Number of messages */
86     int		msi_alloc;	/* Number of allocated messages. */
87     uint64_t	msi_addr;	/* Contents of address register. */
88     uint16_t	msi_data;	/* Contents of data register. */
89     u_int	msi_handlers;
90 };
91 
92 /* Interesting values for PCI MSI-X */
93 struct msix_vector {
94     TAILQ_ENTRY(msix_vector) mv_link;
95     uint64_t	mv_address;	/* Contents of address register. */
96     uint32_t	mv_data;	/* Contents of data register. */
97     int		mv_rid;
98 };
99 TAILQ_HEAD(msix_vectorlist, msix_vector);
100 
101 struct pcicfg_msix {
102     uint16_t	msix_ctrl;	/* Message Control */
103     uint16_t	msix_msgnum;	/* Number of messages */
104     uint8_t	msix_location;	/* Offset of MSI-X capability registers. */
105     uint8_t	msix_table_bar;	/* BAR containing vector table. */
106     uint8_t	msix_pba_bar;	/* BAR containing PBA. */
107     uint32_t	msix_table_offset;
108     uint32_t	msix_pba_offset;
109     int		msix_alloc;	/* Number of allocated vectors. */
110     struct resource *msix_table_res;	/* Resource containing vector table. */
111     struct resource *msix_pba_res;	/* Resource containing PBA. */
112     struct msix_vectorlist msix_vectors;
113 };
114 
115 /* Interesting values for HyperTransport */
116 struct pcicfg_ht {
117     uint8_t	ht_slave;	/* Non-zero if device is an HT slave. */
118     uint8_t	ht_msimap;	/* Offset of MSI mapping cap registers. */
119     uint16_t	ht_msictrl;	/* MSI mapping control */
120     uint64_t	ht_msiaddr;	/* MSI mapping base address */
121 };
122 
123 /* Interesting values for PCI Express capability */
124 struct pcicfg_expr {
125     uint8_t	expr_ptr;	/* capability ptr */
126     uint16_t	expr_cap;	/* capabilities */
127     uint32_t	expr_slotcap;	/* slot capabilities */
128 };
129 
130 /* Interesting values for PCI-X */
131 struct pcicfg_pcix {
132     uint8_t	pcix_ptr;
133 };
134 
135 /* config header information common to all header types */
136 typedef struct pcicfg {
137     struct device *dev;		/* device which owns this */
138 
139     uint32_t	bar[PCI_MAXMAPS_0]; /* BARs */
140     uint32_t	bios;		/* BIOS mapping */
141 
142     uint16_t	subvendor;	/* card vendor ID */
143     uint16_t	subdevice;	/* card device ID, assigned by card vendor */
144     uint16_t	vendor;		/* chip vendor ID */
145     uint16_t	device;		/* chip device ID, assigned by chip vendor */
146 
147     uint16_t	cmdreg;		/* disable/enable chip and PCI options */
148     uint16_t	statreg;	/* supported PCI features and error state */
149 
150     uint8_t	baseclass;	/* chip PCI class */
151     uint8_t	subclass;	/* chip PCI subclass */
152     uint8_t	progif;		/* chip PCI programming interface */
153     uint8_t	revid;		/* chip revision ID */
154 
155     uint8_t	hdrtype;	/* chip config header type */
156     uint8_t	cachelnsz;	/* cache line size in 4byte units */
157     uint8_t	intpin;		/* PCI interrupt pin */
158     uint8_t	intline;	/* interrupt line (IRQ for PC arch) */
159 
160     uint8_t	mingnt;		/* min. useful bus grant time in 250ns units */
161     uint8_t	maxlat;		/* max. tolerated bus grant latency in 250ns */
162     uint8_t	lattimer;	/* latency timer in units of 30ns bus cycles */
163 
164     uint8_t	mfdev;		/* multi-function device (from hdrtype reg) */
165     uint8_t	nummaps;	/* actual number of PCI maps used */
166 
167     uint32_t	domain;		/* PCI domain */
168     uint8_t	bus;		/* config space bus address */
169     uint8_t	slot;		/* config space slot address */
170     uint8_t	func;		/* config space function number */
171 
172 #ifdef COMPAT_OLDPCI
173     uint8_t	secondarybus;	/* bus on secondary side of bridge, if any */
174 #else
175     uint8_t	dummy;
176 #endif
177 
178     struct pcicfg_pp pp;	/* pci power management */
179     struct pcicfg_vpd vpd;	/* pci vital product data */
180     struct pcicfg_msi msi;	/* pci msi */
181     struct pcicfg_msix msix;	/* pci msi-x */
182     struct pcicfg_ht ht;	/* HyperTransport */
183     struct pcicfg_expr expr;	/* PCI Express */
184     struct pcicfg_pcix pcix;	/* PCI-X */
185 } pcicfgregs;
186 
187 /* additional type 1 device config header information (PCI to PCI bridge) */
188 
189 #define	PCI_PPBMEMBASE(h,l)  ((((pci_addr_t)(h) << 32) + ((l)<<16)) & ~0xfffff)
190 #define	PCI_PPBMEMLIMIT(h,l) ((((pci_addr_t)(h) << 32) + ((l)<<16)) | 0xfffff)
191 #define	PCI_PPBIOBASE(h,l)   ((((h)<<16) + ((l)<<8)) & ~0xfff)
192 #define	PCI_PPBIOLIMIT(h,l)  ((((h)<<16) + ((l)<<8)) | 0xfff)
193 
194 typedef struct {
195     pci_addr_t	pmembase;	/* base address of prefetchable memory */
196     pci_addr_t	pmemlimit;	/* topmost address of prefetchable memory */
197     uint32_t	membase;	/* base address of memory window */
198     uint32_t	memlimit;	/* topmost address of memory window */
199     uint32_t	iobase;		/* base address of port window */
200     uint32_t	iolimit;	/* topmost address of port window */
201     uint16_t	secstat;	/* secondary bus status register */
202     uint16_t	bridgectl;	/* bridge control register */
203     uint8_t	seclat;		/* CardBus latency timer */
204 } pcih1cfgregs;
205 
206 /* additional type 2 device config header information (CardBus bridge) */
207 
208 typedef struct {
209     uint32_t	membase0;	/* base address of memory window */
210     uint32_t	memlimit0;	/* topmost address of memory window */
211     uint32_t	membase1;	/* base address of memory window */
212     uint32_t	memlimit1;	/* topmost address of memory window */
213     uint32_t	iobase0;	/* base address of port window */
214     uint32_t	iolimit0;	/* topmost address of port window */
215     uint32_t	iobase1;	/* base address of port window */
216     uint32_t	iolimit1;	/* topmost address of port window */
217     uint32_t	pccardif;	/* PC Card 16bit IF legacy more base addr. */
218     uint16_t	secstat;	/* secondary bus status register */
219     uint16_t	bridgectl;	/* bridge control register */
220     uint8_t	seclat;		/* CardBus latency timer */
221 } pcih2cfgregs;
222 
223 extern uint32_t pci_numdevs;
224 
225 /* Only if the prerequisites are present */
226 #if defined(_SYS_BUS_H_) && defined(_SYS_PCIIO_H_)
227 struct pci_devinfo {
228         STAILQ_ENTRY(pci_devinfo) pci_links;
229 	struct resource_list resources;
230 	pcicfgregs		cfg;
231 	struct pci_conf		conf;
232 };
233 #endif
234 
235 #ifdef _SYS_BUS_H_
236 
237 #include "pci_if.h"
238 
239 /*
240  * Define pci-specific resource flags for accessing memory via dense
241  * or bwx memory spaces. These flags are ignored on i386.
242  */
243 #define	PCI_RF_DENSE	0x10000
244 #define	PCI_RF_BWX	0x20000
245 
246 enum pci_device_ivars {
247     PCI_IVAR_SUBVENDOR,
248     PCI_IVAR_SUBDEVICE,
249     PCI_IVAR_VENDOR,
250     PCI_IVAR_DEVICE,
251     PCI_IVAR_DEVID,
252     PCI_IVAR_CLASS,
253     PCI_IVAR_SUBCLASS,
254     PCI_IVAR_PROGIF,
255     PCI_IVAR_REVID,
256     PCI_IVAR_INTPIN,
257     PCI_IVAR_IRQ,
258     PCI_IVAR_DOMAIN,
259     PCI_IVAR_BUS,
260     PCI_IVAR_SLOT,
261     PCI_IVAR_FUNCTION,
262     PCI_IVAR_ETHADDR,
263     PCI_IVAR_CMDREG,
264     PCI_IVAR_CACHELNSZ,
265     PCI_IVAR_MINGNT,
266     PCI_IVAR_MAXLAT,
267     PCI_IVAR_LATTIMER,
268     PCI_IVAR_PCIXCAP_PTR,
269     PCI_IVAR_PCIECAP_PTR,
270     PCI_IVAR_VPDCAP_PTR
271 };
272 
273 /*
274  * Simplified accessors for pci devices
275  */
276 #define	PCI_ACCESSOR(var, ivar, type)					\
277 	__BUS_ACCESSOR(pci, var, PCI, ivar, type)
278 
279 PCI_ACCESSOR(subvendor,		SUBVENDOR,	uint16_t)
280 PCI_ACCESSOR(subdevice,		SUBDEVICE,	uint16_t)
281 PCI_ACCESSOR(vendor,		VENDOR,		uint16_t)
282 PCI_ACCESSOR(device,		DEVICE,		uint16_t)
283 PCI_ACCESSOR(devid,		DEVID,		uint32_t)
284 PCI_ACCESSOR(class,		CLASS,		uint8_t)
285 PCI_ACCESSOR(subclass,		SUBCLASS,	uint8_t)
286 PCI_ACCESSOR(progif,		PROGIF,		uint8_t)
287 PCI_ACCESSOR(revid,		REVID,		uint8_t)
288 PCI_ACCESSOR(intpin,		INTPIN,		uint8_t)
289 PCI_ACCESSOR(irq,		IRQ,		uint8_t)
290 PCI_ACCESSOR(domain,		DOMAIN,		uint32_t)
291 PCI_ACCESSOR(bus,		BUS,		uint8_t)
292 PCI_ACCESSOR(slot,		SLOT,		uint8_t)
293 PCI_ACCESSOR(function,		FUNCTION,	uint8_t)
294 PCI_ACCESSOR(ether,		ETHADDR,	uint8_t *)
295 PCI_ACCESSOR(cmdreg,		CMDREG,		uint8_t)
296 PCI_ACCESSOR(cachelnsz,		CACHELNSZ,	uint8_t)
297 PCI_ACCESSOR(mingnt,		MINGNT,		uint8_t)
298 PCI_ACCESSOR(maxlat,		MAXLAT,		uint8_t)
299 PCI_ACCESSOR(lattimer,		LATTIMER,	uint8_t)
300 PCI_ACCESSOR(pcixcap_ptr,	PCIXCAP_PTR,	uint8_t)
301 PCI_ACCESSOR(pciecap_ptr,	PCIECAP_PTR,	uint8_t)
302 PCI_ACCESSOR(vpdcap_ptr,	VPDCAP_PTR,	uint8_t)
303 
304 #undef PCI_ACCESSOR
305 
306 /*
307  * Operations on configuration space.
308  */
309 static __inline uint32_t
310 pci_read_config(device_t dev, int reg, int width)
311 {
312     return PCI_READ_CONFIG(device_get_parent(dev), dev, reg, width);
313 }
314 
315 static __inline void
316 pci_write_config(device_t dev, int reg, uint32_t val, int width)
317 {
318     PCI_WRITE_CONFIG(device_get_parent(dev), dev, reg, val, width);
319 }
320 
321 /*
322  * Ivars for pci bridges.
323  */
324 
325 /*typedef enum pci_device_ivars pcib_device_ivars;*/
326 enum pcib_device_ivars {
327 	PCIB_IVAR_DOMAIN,
328 	PCIB_IVAR_BUS
329 };
330 
331 #define	PCIB_ACCESSOR(var, ivar, type)					 \
332     __BUS_ACCESSOR(pcib, var, PCIB, ivar, type)
333 
334 PCIB_ACCESSOR(domain,		DOMAIN,		uint32_t)
335 PCIB_ACCESSOR(bus,		BUS,		uint32_t)
336 
337 #undef PCIB_ACCESSOR
338 
339 /*
340  * PCI interrupt validation.  Invalid interrupt values such as 0 or 128
341  * on i386 or other platforms should be mapped out in the MD pcireadconf
342  * code and not here, since the only MI invalid IRQ is 255.
343  */
344 #define	PCI_INVALID_IRQ		255
345 #define	PCI_INTERRUPT_VALID(x)	((x) != PCI_INVALID_IRQ)
346 
347 /*
348  * Convenience functions.
349  *
350  * These should be used in preference to manually manipulating
351  * configuration space.
352  */
353 static __inline int
354 pci_enable_busmaster(device_t dev)
355 {
356     return(PCI_ENABLE_BUSMASTER(device_get_parent(dev), dev));
357 }
358 
359 static __inline int
360 pci_disable_busmaster(device_t dev)
361 {
362     return(PCI_DISABLE_BUSMASTER(device_get_parent(dev), dev));
363 }
364 
365 static __inline int
366 pci_enable_io(device_t dev, int space)
367 {
368     return(PCI_ENABLE_IO(device_get_parent(dev), dev, space));
369 }
370 
371 static __inline int
372 pci_disable_io(device_t dev, int space)
373 {
374     return(PCI_DISABLE_IO(device_get_parent(dev), dev, space));
375 }
376 
377 static __inline int
378 pci_get_vpd_ident(device_t dev, const char **identptr)
379 {
380     return(PCI_GET_VPD_IDENT(device_get_parent(dev), dev, identptr));
381 }
382 
383 static __inline int
384 pci_get_vpd_readonly(device_t dev, const char *kw, const char **identptr)
385 {
386     return(PCI_GET_VPD_READONLY(device_get_parent(dev), dev, kw, identptr));
387 }
388 
389 /*
390  * Check if the address range falls within the VGA defined address range(s)
391  */
392 static __inline int
393 pci_is_vga_ioport_range(u_long start, u_long end)
394 {
395 
396 	return (((start >= 0x3b0 && end <= 0x3bb) ||
397 	    (start >= 0x3c0 && end <= 0x3df)) ? 1 : 0);
398 }
399 
400 static __inline int
401 pci_is_vga_memory_range(u_long start, u_long end)
402 {
403 
404 	return ((start >= 0xa0000 && end <= 0xbffff) ? 1 : 0);
405 }
406 
407 int pcie_slot_implemented(device_t);
408 void pcie_set_max_readrq(device_t, uint16_t);
409 uint16_t pcie_get_max_readrq(device_t);
410 
411 /*
412  * PCI power states are as defined by ACPI:
413  *
414  * D0	State in which device is on and running.  It is receiving full
415  *	power from the system and delivering full functionality to the user.
416  * D1	Class-specific low-power state in which device context may or may not
417  *	be lost.  Buses in D1 cannot do anything to the bus that would force
418  *	devices on that bus to lose context.
419  * D2	Class-specific low-power state in which device context may or may
420  *	not be lost.  Attains greater power savings than D1.  Buses in D2
421  *	can cause devices on that bus to lose some context.  Devices in D2
422  *	must be prepared for the bus to be in D2 or higher.
423  * D3	State in which the device is off and not running.  Device context is
424  *	lost.  Power can be removed from the device.
425  */
426 #define	PCI_POWERSTATE_D0	0
427 #define	PCI_POWERSTATE_D1	1
428 #define	PCI_POWERSTATE_D2	2
429 #define	PCI_POWERSTATE_D3	3
430 #define	PCI_POWERSTATE_UNKNOWN	-1
431 
432 static __inline int
433 pci_set_powerstate(device_t dev, int state)
434 {
435     return PCI_SET_POWERSTATE(device_get_parent(dev), dev, state);
436 }
437 
438 static __inline int
439 pci_get_powerstate(device_t dev)
440 {
441     return PCI_GET_POWERSTATE(device_get_parent(dev), dev);
442 }
443 
444 static __inline int
445 pci_find_extcap(device_t dev, int capability, int *capreg)
446 {
447     return PCI_FIND_EXTCAP(device_get_parent(dev), dev, capability, capreg);
448 }
449 
450 static __inline int
451 pci_is_pcie(device_t dev)
452 {
453 	return (pci_get_pciecap_ptr(dev) != 0);
454 }
455 
456 static __inline int
457 pci_is_pcix(device_t dev)
458 {
459 	return (pci_get_pcixcap_ptr(dev) != 0);
460 }
461 
462 static __inline int
463 pci_alloc_msi(device_t dev, int *rid, int count, int cpuid)
464 {
465     return (PCI_ALLOC_MSI(device_get_parent(dev), dev, rid, count, cpuid));
466 }
467 
468 static __inline int
469 pci_release_msi(device_t dev)
470 {
471     return (PCI_RELEASE_MSI(device_get_parent(dev), dev));
472 }
473 
474 static __inline int
475 pci_alloc_msix_vector(device_t dev, u_int vector, int *rid, int cpuid)
476 {
477     return (PCI_ALLOC_MSIX_VECTOR(device_get_parent(dev), dev, vector, rid,
478         cpuid));
479 }
480 
481 static __inline int
482 pci_release_msix_vector(device_t dev, int rid)
483 {
484 	return PCI_RELEASE_MSIX_VECTOR(device_get_parent(dev), dev, rid);
485 }
486 
487 static __inline int
488 pci_msi_count(device_t dev)
489 {
490     return (PCI_MSI_COUNT(device_get_parent(dev), dev));
491 }
492 
493 static __inline int
494 pci_msix_count(device_t dev)
495 {
496     return (PCI_MSIX_COUNT(device_get_parent(dev), dev));
497 }
498 
499 device_t pci_find_bsf(uint8_t, uint8_t, uint8_t);
500 device_t pci_find_dbsf(uint32_t, uint8_t, uint8_t, uint8_t);
501 device_t pci_find_device(uint16_t, uint16_t);
502 
503 /* Can be used by drivers to manage the MSI-X table. */
504 int	pci_pending_msix_vector(device_t dev, u_int index);
505 int	pci_setup_msix(device_t dev);
506 void	pci_teardown_msix(device_t dev);
507 void	pci_enable_msix(device_t dev);
508 void	pci_disable_msix(device_t dev);
509 
510 int	pci_msi_device_blacklisted(device_t dev);
511 
512 void	pci_ht_map_msi(device_t dev, uint64_t addr);
513 
514 /* Returns PCI_INTR_TYPE_ */
515 int	pci_alloc_1intr(device_t dev, int msi_enable, int *rid, u_int *flags);
516 
517 #define PCI_INTR_TYPE_LEGACY	0
518 #define PCI_INTR_TYPE_MSI	1
519 #define PCI_INTR_TYPE_MSIX	2	/* not yet */
520 
521 #endif	/* _SYS_BUS_H_ */
522 
523 /*
524  * cdev switch for control device, initialised in generic PCI code
525  */
526 extern struct cdevsw pcicdev;
527 
528 /*
529  * List of all PCI devices, generation count for the list.
530  */
531 STAILQ_HEAD(devlist, pci_devinfo);
532 
533 extern struct devlist	pci_devq;
534 extern uint32_t	pci_generation;
535 
536 /* for compatibility to FreeBSD-2.2 and 3.x versions of PCI code */
537 
538 #if defined(_KERNEL) && !defined(KLD_MODULE)
539 #include "opt_compat_oldpci.h"
540 #endif
541 
542 #ifdef COMPAT_OLDPCI
543 /* all this is going some day */
544 
545 typedef pcicfgregs *pcici_t;
546 typedef unsigned pcidi_t;
547 typedef void pci_inthand_t(void *arg);
548 
549 #define pci_max_burst_len (3)
550 
551 /* just copied from old PCI code for now ... */
552 
553 struct pci_device {
554     char*    pd_name;
555     const char*  (*pd_probe ) (pcici_t tag, pcidi_t type);
556     void   (*pd_attach) (pcici_t tag, int     unit);
557     u_long  *pd_count;
558     int    (*pd_shutdown) (int, int);
559 };
560 
561 #ifdef __i386__
562 typedef u_short pci_port_t;
563 #else
564 typedef u_int pci_port_t;
565 #endif
566 
567 u_long pci_conf_read (pcici_t tag, u_long reg);
568 void pci_conf_write (pcici_t tag, u_long reg, u_long data);
569 int pci_map_port (pcici_t tag, u_long reg, pci_port_t* pa);
570 int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa);
571 int pci_map_int (pcici_t tag, pci_inthand_t *handler, void *arg);
572 int pci_map_int_right(pcici_t cfg, pci_inthand_t *handler, void *arg,
573 		      u_int flags);
574 int pci_unmap_int (pcici_t tag);
575 
576 void pci_cfgwrite (pcicfgregs *cfg, int reg, int data, int bytes);
577 
578 pcici_t pci_get_parent_from_tag(pcici_t tag);
579 int     pci_get_bus_from_tag(pcici_t tag);
580 
581 pcicfgregs *pci_devlist_get_parent(pcicfgregs *cfg);
582 
583 struct module;
584 int compat_pci_handler (struct module *, int, void *);
585 #define COMPAT_PCI_DRIVER(name, pcidata)				\
586 static moduledata_t name##_mod = {					\
587 	#name,								\
588 	compat_pci_handler,						\
589 	&pcidata							\
590 };									\
591 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_ANY)
592 
593 #endif /* COMPAT_OLDPCI */
594 
595 #endif /* _PCIVAR_H_ */
596