ubavar.h revision 1.32
1 /* $NetBSD: ubavar.h,v 1.32 2001/05/13 15:23:37 ragge 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)ubavar.h 7.7 (Berkeley) 6/28/90 36 */ 37 #ifndef _QBUS_UBAVAR_H 38 #define _QBUS_UBAVAR_H 39 40 /* 41 * This file contains definitions related to the kernel structures 42 * for dealing with the unibus adapters. 43 * 44 * Each uba has a uba_softc structure. 45 * Each unibus controller which is not a device has a uba_ctlr structure. 46 * Each unibus device has a uba_device structure. 47 */ 48 49 /* 50 * Per-uba structure. 51 * 52 * This structure holds the interrupt vector for the uba, 53 * and its address in physical and virtual space. At boot time 54 * we determine the devices attached to the uba's and their 55 * interrupt vectors, filling in uh_vec. We free the map 56 * register and bdp resources of the uba into the structures 57 * defined here. 58 * 59 * During normal operation, resources are allocated and returned 60 * to the structures here. We watch the number of passive releases 61 * on each uba, and if the number is excessive may reset the uba. 62 * 63 * When uba resources are needed and not available, or if a device 64 * which can tolerate no other uba activity (rk07) gets on the bus, 65 * then device drivers may have to wait to get to the bus and are 66 * queued here. It is also possible for processes to block in 67 * the unibus driver in resource wait (mrwant, bdpwant); these 68 * wait states are also recorded here. 69 */ 70 struct uba_softc { 71 struct device uh_dev; /* Device struct, autoconfig */ 72 struct evcnt uh_intrcnt; /* interrupt counting */ 73 SIMPLEQ_HEAD(, uba_unit) uh_resq; /* resource wait chain */ 74 SIMPLEQ_HEAD(, uba_reset) uh_resetq; /* ubareset queue */ 75 int uh_lastiv; /* last free interrupt vector */ 76 int (*uh_errchk) __P((struct uba_softc *)); 77 void (*uh_beforescan) __P((struct uba_softc *)); 78 void (*uh_afterscan) __P((struct uba_softc *)); 79 void (*uh_ubainit) __P((struct uba_softc *)); 80 void (*uh_ubapurge) __P((struct uba_softc *, int)); 81 short uh_nr; /* Unibus sequential number */ 82 short uh_type; /* Type of bus */ 83 bus_space_tag_t uh_iot; /* Tag for this Unibus */ 84 bus_space_handle_t uh_ioh; /* Handle for I/O space */ 85 bus_dma_tag_t uh_dmat; 86 }; 87 88 /* 89 * Per-controller structure. 90 * The unit struct is common to both the adapter and the controller 91 * to which it belongs. It is only used on controllers that handles 92 * BDP's, and calls the adapter queueing subroutines. 93 */ 94 struct uba_unit { 95 SIMPLEQ_ENTRY(uba_unit) uu_resq;/* Queue while waiting for resources */ 96 void *uu_softc; /* Pointer to units softc */ 97 int uu_bdp; /* for controllers that hang on to bdp's */ 98 int (*uu_ready) __P((struct uba_unit *)); 99 void *uu_ref; /* Buffer this is related to */ 100 short uu_xclu; /* want exclusive use of bdp's */ 101 short uu_keepbdp; /* hang on to bdp's once allocated */ 102 }; 103 104 /* 105 * Reset structure. All devices that needs to be reinitialized 106 * after an ubareset registers with this struct. 107 */ 108 struct uba_reset { 109 SIMPLEQ_ENTRY(uba_reset) ur_resetq; 110 void (*ur_reset)(struct device *); 111 struct device *ur_dev; 112 }; 113 114 /* 115 * uba_attach_args is used during autoconfiguration. It is sent 116 * from ubascan() to each (possible) device. 117 */ 118 struct uba_attach_args { 119 bus_space_tag_t ua_iot; /* Tag for this bus I/O-space */ 120 bus_addr_t ua_ioh; /* I/O regs addr */ 121 bus_dma_tag_t ua_dmat; /* DMA tag for this bus'es dma */ 122 struct evcnt *ua_evcnt; 123 void *ua_icookie; /* Cookie for interrupt establish */ 124 int ua_iaddr; /* Full CSR address of device */ 125 int ua_br; /* IPL this dev interrupted on */ 126 int ua_cvec; /* Vector for this device */ 127 }; 128 129 /* 130 * Flags to UBA map/bdp allocation routines 131 */ 132 #define UBA_NEEDBDP 0x01 /* transfer needs a bdp */ 133 #define UBA_CANTWAIT 0x02 /* don't block me */ 134 #define UBA_NEED16 0x04 /* need 16 bit addresses only */ 135 #define UBA_HAVEBDP 0x08 /* use bdp specified in high bits */ 136 #define UBA_DONTQUE 0x10 /* Do not enqueue xfer */ 137 138 /* 139 * Type of adapter. 140 */ 141 #define UBA_UBA 0 /* Traditional unibus adapter */ 142 #define UBA_MVI 1 /* MVI direct-mapped unibus */ 143 #define UBA_QBUS 2 /* Qbus with map registers */ 144 /* 145 * Struct for unibus allocation. 146 */ 147 struct ubinfo { 148 bus_dmamap_t ui_dmam; 149 bus_dma_segment_t ui_seg; 150 int ui_rseg; 151 caddr_t ui_vaddr; 152 bus_addr_t ui_baddr; 153 bus_size_t ui_size; 154 }; 155 156 /* 157 * Some common defines for all subtypes of U/Q-buses/adapters. 158 */ 159 #define MAXUBAXFER (63*1024) /* Max transfer size in bytes */ 160 #define ubdevreg(addr) ((addr) & 017777) 161 162 #ifdef _KERNEL 163 void uba_intr_establish(void *, int, void (*)(void *), void *, struct evcnt *); 164 void uba_reset_establish(void (*)(struct device *), struct device *); 165 void uba_attach(struct uba_softc *, unsigned long); 166 void uba_enqueue(struct uba_unit *); 167 void uba_done(struct uba_softc *); 168 void ubareset(struct uba_softc *); 169 int uballoc(struct uba_softc *, struct ubinfo *, int); 170 int ubmemalloc(struct uba_softc *, struct ubinfo *, int); 171 void ubfree(struct uba_softc *, struct ubinfo *); 172 void ubmemfree(struct uba_softc *, struct ubinfo *); 173 #endif /* _KERNEL */ 174 175 #endif /* _QBUS_UBAVAR_H */ 176
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