/*
 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: pcivar.h,v 1.22 1998/10/06 14:18:40 dfr Exp $
 *
 */

#ifndef _PCIVAR_H_
#define _PCIVAR_H_

#ifndef PCI_COMPAT
#define PCI_COMPAT
#endif

#include <pci/pci_ioctl.h> /* XXX KDM */
#include <sys/queue.h>

/* some PCI bus constants */

#define PCI_BUSMAX	255	/* highest supported bus number */
#define PCI_SLOTMAX	31	/* highest supported slot number */
#define PCI_FUNCMAX	7	/* highest supported function number */
#define PCI_REGMAX	255	/* highest supported config register addr. */

#define PCI_MAXMAPS_0	6	/* max. no. of memory/port maps */
#define PCI_MAXMAPS_1	2	/* max. no. of maps for PCI to PCI bridge */
#define PCI_MAXMAPS_2	1	/* max. no. of maps for CardBus bridge */

/* pci_addr_t covers this system's PCI bus address space: 32 or 64 bit */

#ifdef PCI_A64
typedef u_int64_t pci_addr_t;	/* u_int64_t for system with 64bit addresses */
#else
typedef u_int32_t pci_addr_t;	/* u_int64_t for system with 64bit addresses */
#endif

/* map register information */

typedef struct {
    u_int32_t	base;
    u_int8_t	type;
#define PCI_MAPMEM	0x01	/* memory map */
#define PCI_MAPMEMP	0x02	/* prefetchable memory map */
#define PCI_MAPPORT	0x04	/* port map */
    u_int8_t	ln2size;
    u_int8_t	ln2range;
/*    u_int8_t	dummy;*/
} pcimap;

/* config header information common to all header types */

typedef struct pcicfg {
    pcimap	*map;		/* pointer to array of PCI maps */
    void	*hdrspec;	/* pointer to header type specific data */

    u_int16_t	subvendor;	/* card vendor ID */
    u_int16_t	subdevice;	/* card device ID, assigned by card vendor */
    u_int16_t	vendor;		/* chip vendor ID */
    u_int16_t	device;		/* chip device ID, assigned by chip vendor */

    u_int16_t	cmdreg;		/* disable/enable chip and PCI options */
    u_int16_t	statreg;	/* supported PCI features and error state */

    u_int8_t	baseclass;	/* chip PCI class */
    u_int8_t	subclass;	/* chip PCI subclass */
    u_int8_t	progif;		/* chip PCI programming interface */
    u_int8_t	revid;		/* chip revision ID */

    u_int8_t	hdrtype;	/* chip config header type */
    u_int8_t	cachelnsz;	/* cache line size in 4byte units */
    u_int8_t	intpin;		/* PCI interrupt pin */
    u_int8_t	intline;	/* interrupt line (IRQ for PC arch) */

    u_int8_t	mingnt;		/* min. useful bus grant time in 250ns units */
    u_int8_t	maxlat;		/* max. tolerated bus grant latency in 250ns */
    u_int8_t	lattimer;	/* latency timer in units of 30ns bus cycles */

    u_int8_t	mfdev;		/* multi-function device (from hdrtype reg) */
    u_int8_t	nummaps;	/* actual number of PCI maps used */

    u_int8_t	bus;		/* config space bus address */
    u_int8_t	slot;		/* config space slot address */
    u_int8_t	func;		/* config space function number */

    u_int8_t	secondarybus;	/* bus on secondary side of bridge, if any */
    u_int8_t	subordinatebus;	/* topmost bus number behind bridge, if any */
} pcicfgregs;

/* additional type 1 device config header information (PCI to PCI bridge) */

#ifdef PCI_A64
#define PCI_PPBMEMBASE(h,l)  ((((pci_addr_t)(h) << 32) + ((l)<<16)) & ~0xfffff)
#define PCI_PPBMEMLIMIT(h,l) ((((pci_addr_t)(h) << 32) + ((l)<<16)) | 0xfffff)
#else
#define PCI_PPBMEMBASE(h,l)  (((l)<<16) & ~0xfffff)
#define PCI_PPBMEMLIMIT(h,l) (((l)<<16) | 0xfffff)
#endif /* PCI_A64 */

#define PCI_PPBIOBASE(h,l)   ((((h)<<16) + ((l)<<8)) & ~0xfff)
#define PCI_PPBIOLIMIT(h,l)  ((((h)<<16) + ((l)<<8)) | 0xfff)

typedef struct {
    pci_addr_t	pmembase;	/* base address of prefetchable memory */
    pci_addr_t	pmemlimit;	/* topmost address of prefetchable memory */
    u_int32_t	membase;	/* base address of memory window */
    u_int32_t	memlimit;	/* topmost address of memory window */
    u_int32_t	iobase;		/* base address of port window */
    u_int32_t	iolimit;	/* topmost address of port window */
    u_int16_t	secstat;	/* secondary bus status register */
    u_int16_t	bridgectl;	/* bridge control register */
    u_int8_t	seclat;		/* CardBus latency timer */
} pcih1cfgregs;

/* additional type 2 device config header information (CardBus bridge) */

typedef struct {
    u_int32_t	membase0;	/* base address of memory window */
    u_int32_t	memlimit0;	/* topmost address of memory window */
    u_int32_t	membase1;	/* base address of memory window */
    u_int32_t	memlimit1;	/* topmost address of memory window */
    u_int32_t	iobase0;	/* base address of port window */
    u_int32_t	iolimit0;	/* topmost address of port window */
    u_int32_t	iobase1;	/* base address of port window */
    u_int32_t	iolimit1;	/* topmost address of port window */
    u_int32_t	pccardif;	/* PC Card 16bit IF legacy more base addr. */
    u_int16_t	secstat;	/* secondary bus status register */
    u_int16_t	bridgectl;	/* bridge control register */
    u_int8_t	seclat;		/* CardBus latency timer */
} pcih2cfgregs;

/* PCI bus attach definitions (there could be multiple PCI bus *trees* ... */

typedef struct pciattach {
    int		unit;
    int		pcibushigh;
    struct pciattach *next;
} pciattach;

struct pci_devinfo {
    	STAILQ_ENTRY(pci_devinfo) pci_links;
	struct pci_device	*device;  /* should this be ifdefed? */
	pcicfgregs		cfg;
	struct pci_conf		conf;
};

extern u_int32_t pci_numdevs;


/* externally visible functions */

int pci_probe (pciattach *attach);
void pci_drvattach(struct pci_devinfo *dinfo);

/* low level PCI config register functions provided by pcibus.c */

int pci_cfgopen (void);
int pci_cfgread (pcicfgregs *cfg, int reg, int bytes);
void pci_cfgwrite (pcicfgregs *cfg, int reg, int data, int bytes);
#ifdef __alpha__
vm_offset_t pci_cvt_to_dense (vm_offset_t);
vm_offset_t pci_cvt_to_bwx (vm_offset_t);
#endif /* __alpha__ */
/* for compatibility to FreeBSD-2.2 version of PCI code */

#ifdef PCI_COMPAT

typedef pcicfgregs *pcici_t;
typedef unsigned pcidi_t;
typedef void pci_inthand_t(void *arg);

#define pci_max_burst_len (3)

/* just copied from old PCI code for now ... */

extern struct linker_set pcidevice_set;
extern int pci_mechanism;

struct pci_device {
    char*    pd_name;
    char*  (*pd_probe ) (pcici_t tag, pcidi_t type);
    void   (*pd_attach) (pcici_t tag, int     unit);
    u_long  *pd_count;
    int    (*pd_shutdown) (int, int);
};

struct pci_lkm {
	struct pci_device *dvp;
	struct pci_lkm	*next;
};

#ifdef __i386__
typedef u_short pci_port_t;
#else
typedef u_int pci_port_t;
#endif

u_long pci_conf_read (pcici_t tag, u_long reg);
void pci_conf_write (pcici_t tag, u_long reg, u_long data);
void pci_configure (void);
int pci_map_port (pcici_t tag, u_long reg, pci_port_t* pa);
int pci_map_mem (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa);
int pci_map_dense (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa);
int pci_map_bwx (pcici_t tag, u_long reg, vm_offset_t* va, vm_offset_t* pa);
int pci_map_int (pcici_t tag, pci_inthand_t *func, void *arg, unsigned *maskptr);
int pci_unmap_int (pcici_t tag);
int pci_register_lkm (struct pci_device *dvp, int if_revision);

#endif /* PCI_COMPAT */
#endif /* _PCIVAR_H_ */
