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      1 /*	$NetBSD: ubavar.h,v 1.39 2008/03/11 05:34:02 matt Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1982, 1986 Regents of the University of California.
      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  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)ubavar.h	7.7 (Berkeley) 6/28/90
     32  */
     33 #ifndef _QBUS_UBAVAR_H
     34 #define	_QBUS_UBAVAR_H
     35 
     36 /*
     37  * This file contains definitions related to the kernel structures
     38  * for dealing with the unibus adapters.
     39  *
     40  * Each uba has a uba_softc structure.
     41  * Each unibus controller which is not a device has a uba_ctlr structure.
     42  * Each unibus device has a uba_device structure.
     43  */
     44 
     45 /*
     46  * Per-uba structure.
     47  *
     48  * This structure holds the interrupt vector for the uba,
     49  * and its address in physical and virtual space.  At boot time
     50  * we determine the devices attached to the uba's and their
     51  * interrupt vectors, filling in uh_vec.  We free the map
     52  * register and bdp resources of the uba into the structures
     53  * defined here.
     54  *
     55  * During normal operation, resources are allocated and returned
     56  * to the structures here.  We watch the number of passive releases
     57  * on each uba, and if the number is excessive may reset the uba.
     58  *
     59  * When uba resources are needed and not available, or if a device
     60  * which can tolerate no other uba activity (rk07) gets on the bus,
     61  * then device drivers may have to wait to get to the bus and are
     62  * queued here.  It is also possible for processes to block in
     63  * the unibus driver in resource wait (mrwant, bdpwant); these
     64  * wait states are also recorded here.
     65  */
     66 struct	uba_softc {
     67 	device_t uh_dev;		/* Device struct, autoconfig */
     68 	struct evcnt uh_intrcnt;		/* interrupt counting */
     69 	SIMPLEQ_HEAD(, uba_unit) uh_resq;	/* resource wait chain */
     70 	SIMPLEQ_HEAD(, uba_reset) uh_resetq;	/* ubareset queue */
     71 	int	uh_lastiv;		/* last free interrupt vector */
     72 	int	(*uh_errchk)(struct uba_softc *);
     73 	void	(*uh_beforescan)(struct uba_softc *);
     74 	void	(*uh_afterscan)(struct uba_softc *);
     75 	void	(*uh_ubainit)(struct uba_softc *);
     76 	void	(*uh_ubapurge)(struct uba_softc *, int);
     77 	short	uh_nr;			/* Unibus sequential number */
     78 	short	uh_type;		/* Type of bus */
     79 	bus_space_tag_t	uh_iot;		/* Tag for this Unibus */
     80 	bus_space_handle_t uh_ioh;	/* Handle for I/O space */
     81 	bus_dma_tag_t	uh_dmat;
     82 	char	*uh_used;		/* I/O addresses used */
     83 };
     84 
     85 /*
     86  * Per-controller structure.
     87  * The unit struct is common to both the adapter and the controller
     88  * to which it belongs. It is only used on controllers that handles
     89  * BDP's, and calls the adapter queueing subroutines.
     90  */
     91 struct	uba_unit {
     92 	SIMPLEQ_ENTRY(uba_unit) uu_resq;/* Queue while waiting for resources */
     93 	device_t uu_dev;	/* unit's device_t */
     94 	int	uu_bdp;		/* for controllers that hang on to bdp's */
     95 	int    (*uu_ready)(struct uba_unit *);
     96 	void	*uu_ref;	/* Buffer this is related to */
     97 	short   uu_xclu;	/* want exclusive use of bdp's */
     98 	short   uu_keepbdp;	/* hang on to bdp's once allocated */
     99 };
    100 
    101 /*
    102  * Reset structure. All devices that needs to be reinitialized
    103  * after an ubareset registers with this struct.
    104  */
    105 struct	uba_reset {
    106 	SIMPLEQ_ENTRY(uba_reset) ur_resetq;
    107 	void (*ur_reset)(device_t);
    108 	device_t ur_dev;
    109 };
    110 
    111 /*
    112  * uba_attach_args is used during autoconfiguration. It is sent
    113  * from ubascan() to each (possible) device.
    114  */
    115 struct uba_attach_args {
    116 	bus_space_tag_t	ua_iot;		/* Tag for this bus I/O-space */
    117 	bus_addr_t	ua_ioh;		/* I/O regs addr */
    118 	bus_dma_tag_t	ua_dmat;	/* DMA tag for this bus'es dma */
    119 	struct evcnt	*ua_evcnt;
    120 	void		*ua_icookie;	/* Cookie for interrupt establish */
    121 	int		ua_iaddr;	/* Full CSR address of device */
    122 	int		ua_br;		/* IPL this dev interrupted on */
    123 	int		ua_cvec;	/* Vector for this device */
    124 };
    125 
    126 /*
    127  * Flags to UBA map/bdp allocation routines
    128  */
    129 #define	UBA_NEEDBDP	0x01		/* transfer needs a bdp */
    130 #define	UBA_CANTWAIT	0x02		/* don't block me */
    131 #define	UBA_NEED16	0x04		/* need 16 bit addresses only */
    132 #define	UBA_HAVEBDP	0x08		/* use bdp specified in high bits */
    133 #define	UBA_DONTQUE	0x10		/* Do not enqueue xfer */
    134 
    135 /*
    136  * Type of adapter.
    137  */
    138 #define	UBA_UBA		0		/* Traditional unibus adapter */
    139 #define	UBA_MVI		1		/* MVI direct-mapped unibus */
    140 #define	UBA_QBUS	2		/* Qbus with map registers */
    141 /*
    142  * Struct for unibus allocation.
    143  */
    144 struct ubinfo {
    145 	bus_dmamap_t ui_dmam;
    146 	bus_dma_segment_t ui_seg;
    147 	int ui_rseg;
    148 	void *ui_vaddr;
    149 	bus_addr_t ui_baddr;
    150 	bus_size_t ui_size;
    151 };
    152 
    153 /*
    154  * Some common defines for all subtypes of U/Q-buses/adapters.
    155  */
    156 #define	MAXUBAXFER	(63*1024)	/* Max transfer size in bytes */
    157 #define ubdevreg(addr) ((addr) & 017777)
    158 
    159 #ifdef _KERNEL
    160 void uba_intr_establish(void *, int, void (*)(void *), void *, struct evcnt *);
    161 void uba_reset_establish(void (*)(device_t), device_t);
    162 void uba_attach(struct uba_softc *, unsigned long);
    163 void uba_enqueue(struct uba_unit *);
    164 void uba_done(struct uba_softc *);
    165 void ubareset(struct uba_softc *);
    166 int uballoc(struct uba_softc *, struct ubinfo *, int);
    167 int ubmemalloc(struct uba_softc *, struct ubinfo *, int);
    168 void ubfree(struct uba_softc *, struct ubinfo *);
    169 void ubmemfree(struct uba_softc *, struct ubinfo *);
    170 #endif /* _KERNEL */
    171 
    172 #endif /* _QBUS_UBAVAR_H */
    173