Annotation of sys/arch/vax/qbus/ubavar.h, Revision 1.1.1.1
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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