Annotation of sys/arch/vax/qbus/ubavar.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ubavar.h,v 1.7 2006/07/19 20:22:37 miod Exp $ */
! 2: /* $NetBSD: ubavar.h,v 1.31 2001/04/26 19:16:07 ragge Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1982, 1986 Regents of the University of California.
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the University nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: *
! 32: * @(#)ubavar.h 7.7 (Berkeley) 6/28/90
! 33: */
! 34: #ifndef _QBUS_UBAVAR_H
! 35: #define _QBUS_UBAVAR_H
! 36:
! 37: /*
! 38: * This file contains definitions related to the kernel structures
! 39: * for dealing with the unibus adapters.
! 40: *
! 41: * Each uba has a uba_softc structure.
! 42: * Each unibus controller which is not a device has a uba_ctlr structure.
! 43: * Each unibus device has a uba_device structure.
! 44: */
! 45:
! 46: /*
! 47: * Per-uba structure.
! 48: *
! 49: * This structure holds the interrupt vector for the uba,
! 50: * and its address in physical and virtual space. At boot time
! 51: * we determine the devices attached to the uba's and their
! 52: * interrupt vectors, filling in uh_vec. We free the map
! 53: * register and bdp resources of the uba into the structures
! 54: * defined here.
! 55: *
! 56: * During normal operation, resources are allocated and returned
! 57: * to the structures here. We watch the number of passive releases
! 58: * on each uba, and if the number is excessive may reset the uba.
! 59: *
! 60: * When uba resources are needed and not available, or if a device
! 61: * which can tolerate no other uba activity (rk07) gets on the bus,
! 62: * then device drivers may have to wait to get to the bus and are
! 63: * queued here. It is also possible for processes to block in
! 64: * the unibus driver in resource wait (mrwant, bdpwant); these
! 65: * wait states are also recorded here.
! 66: */
! 67: struct uba_softc {
! 68: struct device uh_dev; /* Device struct, autoconfig */
! 69: struct evcount uh_intrcnt; /* interrupt counting */
! 70: SIMPLEQ_HEAD(, uba_unit) uh_resq; /* resource wait chain */
! 71: SIMPLEQ_HEAD(, uba_reset) uh_resetq; /* ubareset queue */
! 72: int uh_lastiv; /* last free interrupt vector */
! 73: int (*uh_errchk)(struct uba_softc *);
! 74: void (*uh_beforescan)(struct uba_softc *);
! 75: void (*uh_afterscan)(struct uba_softc *);
! 76: void (*uh_ubainit)(struct uba_softc *);
! 77: void (*uh_ubapurge)(struct uba_softc *, int);
! 78: short uh_nr; /* Unibus sequential number */
! 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: };
! 83:
! 84: /*
! 85: * Per-controller structure.
! 86: * The unit struct is common to both the adapter and the controller
! 87: * to which it belongs. It is only used on controllers that handles
! 88: * BDP's, and calls the adapter queueing subroutines.
! 89: */
! 90: struct uba_unit {
! 91: SIMPLEQ_ENTRY(uba_unit) uu_resq;/* Queue while waiting for resources */
! 92: void *uu_softc; /* Pointer to units softc */
! 93: int uu_bdp; /* for controllers that hang on to bdp's */
! 94: int (*uu_ready)(struct uba_unit *);
! 95: void *uu_ref; /* Buffer this is related to */
! 96: short uu_xclu; /* want exclusive use of bdp's */
! 97: short uu_keepbdp; /* hang on to bdp's once allocated */
! 98: };
! 99:
! 100: /*
! 101: * Reset structure. All devices that needs to be reinitialized
! 102: * after an ubareset registers with this struct.
! 103: */
! 104: struct uba_reset {
! 105: SIMPLEQ_ENTRY(uba_reset) ur_resetq;
! 106: void (*ur_reset)(struct device *);
! 107: struct device *ur_dev;
! 108: };
! 109:
! 110: /*
! 111: * uba_attach_args is used during autoconfiguration. It is sent
! 112: * from ubascan() to each (possible) device.
! 113: */
! 114: struct uba_attach_args {
! 115: bus_space_tag_t ua_iot; /* Tag for this bus I/O-space */
! 116: bus_addr_t ua_ioh; /* I/O regs addr */
! 117: bus_dma_tag_t ua_dmat;
! 118: void *ua_icookie; /* Cookie for interrupt establish */
! 119: int ua_iaddr; /* Full CSR address of device */
! 120: int ua_br; /* IPL this dev interrupted on */
! 121: int ua_cvec; /* Vector for this device */
! 122: };
! 123:
! 124: /*
! 125: * Flags to UBA map/bdp allocation routines
! 126: */
! 127: #define UBA_NEEDBDP 0x01 /* transfer needs a bdp */
! 128: #define UBA_CANTWAIT 0x02 /* don't block me */
! 129: #define UBA_NEED16 0x04 /* need 16 bit addresses only */
! 130: #define UBA_HAVEBDP 0x08 /* use bdp specified in high bits */
! 131: #define UBA_DONTQUE 0x10 /* Do not enqueue xfer */
! 132:
! 133: /*
! 134: * Struct for unibus allocation.
! 135: */
! 136: struct ubinfo {
! 137: bus_dmamap_t ui_dmam;
! 138: bus_dma_segment_t ui_seg;
! 139: int ui_rseg;
! 140: caddr_t ui_vaddr;
! 141: bus_addr_t ui_baddr;
! 142: bus_size_t ui_size;
! 143: };
! 144:
! 145: /*
! 146: * Some common defines for all subtypes of U/Q-buses/adapters.
! 147: */
! 148: #define UBAIOSIZE (8*1024) /* 8K I/O space */
! 149: #define ubdevreg(addr) ((addr) & 017777)
! 150:
! 151: #ifdef _KERNEL
! 152: void uba_intr_establish(void *, int, void (*)(void *), void *, struct evcount *);
! 153: void uba_reset_establish(void (*)(struct device *), struct device *);
! 154: void uba_attach(struct uba_softc *, unsigned long);
! 155: void uba_enqueue(struct uba_unit *);
! 156: void uba_done(struct uba_softc *);
! 157: void ubareset(struct uba_softc *);
! 158: int uballoc(struct uba_softc *, struct ubinfo *, int);
! 159: int ubmemalloc(struct uba_softc *, struct ubinfo *, int);
! 160: void ubfree(struct uba_softc *, struct ubinfo *);
! 161: void ubmemfree(struct uba_softc *, struct ubinfo *);
! 162: #endif /* _KERNEL */
! 163:
! 164: #endif /* _QBUS_UBAVAR_H */
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