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/* $OpenBSD: ubavar.h,v 1.1 2000/04/27 03:14:49 bjc Exp $ */
/* $NetBSD: ubavar.h,v 1.26 2000/01/24 02:40:30 matt Exp $ */
/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* 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, 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* @(#)ubavar.h 7.7 (Berkeley) 6/28/90
*/
#ifndef _QBUS_UBAVAR_H
#define _QBUS_UBAVAR_H
/*
* This file contains definitions related to the kernel structures
* for dealing with the unibus adapters.
*
* Each uba has a uba_softc structure.
* Each unibus controller which is not a device has a uba_ctlr structure.
* Each unibus device has a uba_device structure.
*/
/*
* Per-uba structure.
*
* This structure holds the interrupt vector for the uba,
* and its address in physical and virtual space. At boot time
* we determine the devices attached to the uba's and their
* interrupt vectors, filling in uh_vec. We free the map
* register and bdp resources of the uba into the structures
* defined here.
*
* During normal operation, resources are allocated and returned
* to the structures here. We watch the number of passive releases
* on each uba, and if the number is excessive may reset the uba.
*
* When uba resources are needed and not available, or if a device
* which can tolerate no other uba activity (rk07) gets on the bus,
* then device drivers may have to wait to get to the bus and are
* queued here. It is also possible for processes to block in
* the unibus driver in resource wait (mrwant, bdpwant); these
* wait states are also recorded here.
*/
struct uba_softc {
struct device uh_dev; /* Device struct, autoconfig */
SIMPLEQ_HEAD(, uba_unit) uh_resq; /* resource wait chain */
void (**uh_reset) __P((int));/* UBA reset function array */
int *uh_resarg; /* array of ubareset args */
int uh_resno; /* Number of devices to reset */
int uh_lastiv; /* last free interrupt vector */
int (*uh_errchk) __P((struct uba_softc *));
void (*uh_beforescan) __P((struct uba_softc *));
void (*uh_afterscan) __P((struct uba_softc *));
void (*uh_ubainit) __P((struct uba_softc *));
void (*uh_ubapurge) __P((struct uba_softc *, int));
short uh_nr; /* Unibus sequential number */
bus_space_tag_t uh_iot; /* Tag for this Unibus */
bus_space_handle_t uh_ioh; /* Handle for I/O space */
bus_dma_tag_t uh_dmat;
};
/*
* Per-controller structure.
* The unit struct is common to both the adapter and the controller
* to which it belongs. It is only used on controllers that handles
* BDP's, and calls the adapter queueing subroutines.
*/
struct uba_unit {
SIMPLEQ_ENTRY(uba_unit) uu_resq;/* Queue while waiting for resources */
void *uu_softc; /* Pointer to units softc */
int uu_bdp; /* for controllers that hang on to bdp's */
int (*uu_ready) __P((struct uba_unit *));
void *uu_ref; /* Buffer this is related to */
short uu_xclu; /* want exclusive use of bdp's */
short uu_keepbdp; /* hang on to bdp's once allocated */
};
/*
* uba_attach_args is used during autoconfiguration. It is sent
* from ubascan() to each (possible) device.
*/
struct uba_attach_args {
bus_space_tag_t ua_iot; /* Tag for this bus I/O-space */
bus_addr_t ua_ioh; /* I/O regs addr */
bus_dma_tag_t ua_dmat;
void *ua_icookie; /* Cookie for interrupt establish */
/* UBA reset routine, filled in by probe */
void (*ua_reset) __P((int));
int ua_iaddr; /* Full CSR address of device */
int ua_br; /* IPL this dev interrupted on */
int ua_cvec; /* Vector for this device */
};
/*
* Flags to UBA map/bdp allocation routines
*/
#define UBA_NEEDBDP 0x01 /* transfer needs a bdp */
#define UBA_CANTWAIT 0x02 /* don't block me */
#define UBA_NEED16 0x04 /* need 16 bit addresses only */
#define UBA_HAVEBDP 0x08 /* use bdp specified in high bits */
#define UBA_DONTQUE 0x10 /* Do not enqueue xfer */
/*
* Some common defines for all subtypes of U/Q-buses/adapters.
*/
#define MAXUBAXFER (63*1024) /* Max transfer size in bytes */
#define UBAIOSIZE (8*1024) /* 8K I/O space */
#define ubdevreg(addr) ((addr) & 017777)
#ifdef _KERNEL
#define b_forw b_hash.le_next /* Nice to have when handling uba queues */
void uba_intr_establish __P((void *, int, void (*)(void *), void *));
void uba_attach __P((struct uba_softc *, unsigned long));
void uba_enqueue __P((struct uba_unit *));
void uba_done __P((struct uba_softc *));
void ubareset __P((int));
#endif /* _KERNEL */
#endif /* _QBUS_UBAVAR_H */
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