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      1 /* $NetBSD: pci_machdep.h,v 1.31 2024/06/23 00:53:34 riastradh Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1999 Matthew R. Green
      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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * 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 #ifndef _MACHINE_PCI_MACHDEP_H_
     30 #define _MACHINE_PCI_MACHDEP_H_
     31 
     32 /*
     33  * Forward declarations.
     34  */
     35 struct pci_attach_args;
     36 
     37 /*
     38  * define some bits used to glue into the common PCI code.
     39  */
     40 
     41 /*
     42  * The stuuuuuuupid allegedly MI PCI code expects pcitag_t to be a
     43  * scalar type.  But we really need to store both the OFW node and
     44  * the bus/device/function info in it.  (We'd like to store more,
     45  * like all the ofw properties, but we don't need to.)  Luckily,
     46  * both are 32-bit values, so we can squeeze them into a uint64_t
     47  * with a little help from some macros.
     48  */
     49 
     50 #define	PCITAG_NODE(x)		(int)(((x)>>32)&0xffffffff)
     51 #define	PCITAG_OFFSET(x)	((x)&0xffffffff)
     52 #define	PCITAG_BUS(t)		((PCITAG_OFFSET(t)>>16)&0xff)
     53 #define	PCITAG_DEV(t)		((PCITAG_OFFSET(t)>>11)&0x1f)
     54 #define	PCITAG_FUN(t)		((PCITAG_OFFSET(t)>>8)&0x7)
     55 #define	PCITAG_CREATE(n,b,d,f)	(((uint64_t)(n)<<32)|((b)<<16)|((d)<<11)|((f)<<8))
     56 #define	PCITAG_SETNODE(t,n)	((t)&0xffffffff)|(((n)<<32)
     57 typedef uint64_t pcitag_t;
     58 
     59 typedef struct sparc_pci_chipset *pci_chipset_tag_t;
     60 typedef u_int pci_intr_handle_t;
     61 
     62 struct sparc_pci_chipset {
     63 	void		*cookie;	/* psycho_pbm/, but sssh! */
     64 	int		rootnode;	/* PCI controller */
     65 
     66 	/* pci(9) interfaces */
     67 	pcireg_t	(*spc_conf_read)(pci_chipset_tag_t, pcitag_t, int);
     68 	void		(*spc_conf_write)(pci_chipset_tag_t, pcitag_t, int, pcireg_t);
     69 
     70 	int		(*spc_intr_map)(const struct pci_attach_args *, pci_intr_handle_t *);
     71 	void		*(*spc_intr_establish)(pci_chipset_tag_t, pci_intr_handle_t, int, int (*)(void *), void *);
     72 
     73 	/* private interfaces */
     74 	int		(*spc_find_ino)(const struct pci_attach_args *, pci_intr_handle_t *);
     75 
     76 	int		spc_busmax;
     77 	struct spc_busnode {
     78 		int	node;
     79 		int	(*valid)(void *);
     80 		void	*arg;
     81 	}		(*spc_busnode)[256];
     82 };
     83 
     84 
     85 void		pci_attach_hook(device_t, device_t,
     86 		    struct pcibus_attach_args *);
     87 int		pci_bus_maxdevs(pci_chipset_tag_t, int);
     88 pcitag_t	pci_make_tag(pci_chipset_tag_t, int, int, int);
     89 void		pci_decompose_tag(pci_chipset_tag_t, pcitag_t, int *, int *,
     90 		    int *);
     91 const char	*pci_intr_string(pci_chipset_tag_t, pci_intr_handle_t,
     92 		    char *, size_t);
     93 const struct evcnt *pci_intr_evcnt(pci_chipset_tag_t, pci_intr_handle_t);
     94 int		pci_intr_map(const struct pci_attach_args *,
     95 		    pci_intr_handle_t *);
     96 void		pci_intr_disestablish(pci_chipset_tag_t, void *);
     97 
     98 int		sparc64_pci_enumerate_bus1(struct pci_softc *, const int *,
     99 		    int (*)(void *, const struct pci_attach_args *), void *,
    100 		    struct pci_attach_args *);
    101 #define PCI_MACHDEP_ENUMERATE_BUS1 sparc64_pci_enumerate_bus1
    102 
    103 #define	pci_conf_read(pc, tag, reg) \
    104 		((pc)->spc_conf_read(pc, tag, reg))
    105 #define	pci_conf_write(pc, tag, reg, val) \
    106 		((pc)->spc_conf_write(pc, tag, reg, val))
    107 #define	pci_intr_establish(pc, handle, level, func, arg) \
    108 		((pc)->spc_intr_establish(pc, handle, level, func, arg))
    109 
    110 /* SPARC specific PCI interfaces */
    111 int		sparc_pci_childspace(int);
    112 
    113 #endif /* _MACHINE_PCI_MACHDEP_H_ */
    114