3a504ef134
Fix so that resource wait queueing works. Changed all functions to take a pointer to uba_softc instead of unit number, except for ubareset(). This must be done later.
194 lines
7.5 KiB
C
194 lines
7.5 KiB
C
/* $NetBSD: ubavar.h,v 1.18 1996/08/20 13:38:04 ragge Exp $ */
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/*
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* Copyright (c) 1982, 1986 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ubavar.h 7.7 (Berkeley) 6/28/90
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*/
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/*
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* This file contains definitions related to the kernel structures
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* for dealing with the unibus adapters.
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*
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* Each uba has a uba_softc structure.
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* Each unibus controller which is not a device has a uba_ctlr structure.
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* Each unibus device has a uba_device structure.
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*/
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#include <sys/buf.h>
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#include <sys/device.h>
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#include <machine/trap.h> /* For struct ivec_dsp */
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/*
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* Per-uba structure.
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*
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* This structure holds the interrupt vector for the uba,
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* and its address in physical and virtual space. At boot time
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* we determine the devices attached to the uba's and their
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* interrupt vectors, filling in uh_vec. We free the map
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* register and bdp resources of the uba into the structures
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* defined here.
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*
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* During normal operation, resources are allocated and returned
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* to the structures here. We watch the number of passive releases
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* on each uba, and if the number is excessive may reset the uba.
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*
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* When uba resources are needed and not available, or if a device
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* which can tolerate no other uba activity (rk07) gets on the bus,
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* then device drivers may have to wait to get to the bus and are
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* queued here. It is also possible for processes to block in
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* the unibus driver in resource wait (mrwant, bdpwant); these
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* wait states are also recorded here.
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*/
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struct uba_softc {
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struct device uh_dev; /* Device struct, autoconfig */
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SIMPLEQ_HEAD(, uba_unit) uh_resq; /* resource wait chain */
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int uh_type; /* type of adaptor */
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struct uba_regs *uh_uba; /* virt addr of uba adaptor regs */
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struct pte *uh_mr; /* start of page map */
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int uh_memsize; /* size of uba memory, pages */
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caddr_t uh_iopage; /* start of uba io page */
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void (**uh_reset) __P((int));/* UBA reset function array */
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int *uh_resarg; /* array of ubareset args */
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int uh_resno; /* Number of devices to reset */
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struct ivec_dsp *uh_idsp; /* Interrupt dispatch area */
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u_int *uh_iarea; /* Interrupt vector array */
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short uh_mrwant; /* someone is waiting for map reg */
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short uh_bdpwant; /* someone awaits bdp's */
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int uh_bdpfree; /* free bdp's */
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int uh_zvcnt; /* number of recent 0 vectors */
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long uh_zvtime; /* time over which zvcnt accumulated */
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int uh_zvtotal; /* total number of 0 vectors */
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int uh_lastiv; /* last free interrupt vector */
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short uh_users; /* transient bdp use count */
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short uh_xclu; /* an rk07 is using this uba! */
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int uh_lastmem; /* limit of any unibus memory */
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struct map *uh_map; /* register free map */
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int (*uh_errchk) __P((struct uba_softc *));
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void (*uh_beforescan) __P((struct uba_softc *));
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void (*uh_afterscan) __P((struct uba_softc *));
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void (*uh_ubainit) __P((struct uba_softc *));
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void (*uh_ubapurge) __P((struct uba_softc *, int));
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#ifdef DW780
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struct ivec_dsp uh_dw780; /* Interrupt handles for DW780 */
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#endif
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short uh_nr; /* Unibus sequential number */
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short uh_nbdp; /* # of BDP's */
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};
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#define UAMSIZ 100
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/* given a pointer to uba_regs, find DWBUA registers */
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/* this should be replaced with a union in uba_softc */
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#define BUA(uba) ((struct dwbua_regs *)(uba))
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/*
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* Per-controller structure.
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* The unit struct is common to both the adapter and the controller
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* to which it belongs. It is only used on controllers that handles
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* BDP's, and calls the adapter queueing subroutines.
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*/
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struct uba_unit {
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SIMPLEQ_ENTRY(uba_unit) uu_resq;/* Queue while waiting for resources */
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void *uu_softc; /* Pointer to units softc */
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int uu_ubinfo; /* save unibus registers, etc */
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int uu_bdp; /* for controllers that hang on to bdp's */
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int (*uu_ready) __P((struct uba_unit *));
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short uu_xclu; /* want exclusive use of bdp's */
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short uu_keepbdp; /* hang on to bdp's once allocated */
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};
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/*
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* uba_attach_args is used during autoconfiguration. It is sent
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* from ubascan() to each (possible) device.
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*/
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struct uba_attach_args {
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caddr_t ua_addr;
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/* Pointer to int routine, filled in by probe*/
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void (*ua_ivec) __P((int));
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/* UBA reset routine, filled in by probe */
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void (*ua_reset) __P((int));
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int ua_iaddr;
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int ua_br;
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int ua_cvec;
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};
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/*
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* Flags to UBA map/bdp allocation routines
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*/
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#define UBA_NEEDBDP 0x01 /* transfer needs a bdp */
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#define UBA_CANTWAIT 0x02 /* don't block me */
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#define UBA_NEED16 0x04 /* need 16 bit addresses only */
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#define UBA_HAVEBDP 0x08 /* use bdp specified in high bits */
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/*
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* Macros to bust return word from map allocation routines.
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* SHOULD USE STRUCTURE TO STORE UBA RESOURCE ALLOCATION:
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*/
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#ifdef notyet
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struct ubinfo {
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long ub_addr; /* unibus address: mr + boff */
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int ub_nmr; /* number of registers, 0 if empty */
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int ub_bdp; /* bdp number, 0 if none */
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};
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#define UBAI_MR(i) (((i) >> 9) & 0x7ff) /* starting map register */
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#define UBAI_BOFF(i) ((i)&0x1ff) /* page offset */
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#else
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#define UBAI_BDP(i) ((int)(((unsigned)(i)) >> 28))
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#define BDPMASK 0xf0000000
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#define UBAI_NMR(i) ((int)((i) >> 20) & 0xff) /* max 255 (=127.5K) */
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#define UBA_MAXNMR 255
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#define UBAI_MR(i) ((int)((i) >> 9) & 0x7ff) /* max 2047 */
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#define UBA_MAXMR 2047
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#define UBAI_BOFF(i) ((int)((i) & 0x1ff))
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#define UBAI_ADDR(i) ((int)((i) & 0xfffff)) /* uba addr (boff+mr) */
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#define UBAI_INFO(off, mr, nmr, bdp) \
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(((bdp) << 28) | ((nmr) << 20) | ((mr) << 9) | (off))
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#endif
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#ifndef _LOCORE
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#ifdef _KERNEL
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#define ubago(ui) ubaqueue(ui)
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#define b_forw b_hash.le_next /* Nice to have when handling uba queues */
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extern struct cfdriver uba_cd;
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void ubasetvec __P((struct device *, int, void (*) __P((int))));
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int uballoc __P((struct uba_softc *, caddr_t, int, int));
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void ubarelse __P((struct uba_softc *, int *));
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int ubaqueue __P((struct uba_unit *, struct buf *));
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void ubadone __P((struct uba_unit *));
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void ubareset __P((int));
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#endif /* _KERNEL */
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#endif !_LOCORE
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