1 /* $NetBSD: ubavar.h,v 1.39 2008/03/11 05:34:02 matt 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)ubavar.h 7.7 (Berkeley) 6/28/90 32 */ 33 #ifndef _QBUS_UBAVAR_H 34 #define _QBUS_UBAVAR_H 35 36 /* 37 * This file contains definitions related to the kernel structures 38 * for dealing with the unibus adapters. 39 * 40 * Each uba has a uba_softc structure. 41 * Each unibus controller which is not a device has a uba_ctlr structure. 42 * Each unibus device has a uba_device structure. 43 */ 44 45 /* 46 * Per-uba structure. 47 * 48 * This structure holds the interrupt vector for the uba, 49 * and its address in physical and virtual space. At boot time 50 * we determine the devices attached to the uba's and their 51 * interrupt vectors, filling in uh_vec. We free the map 52 * register and bdp resources of the uba into the structures 53 * defined here. 54 * 55 * During normal operation, resources are allocated and returned 56 * to the structures here. We watch the number of passive releases 57 * on each uba, and if the number is excessive may reset the uba. 58 * 59 * When uba resources are needed and not available, or if a device 60 * which can tolerate no other uba activity (rk07) gets on the bus, 61 * then device drivers may have to wait to get to the bus and are 62 * queued here. It is also possible for processes to block in 63 * the unibus driver in resource wait (mrwant, bdpwant); these 64 * wait states are also recorded here. 65 */ 66 struct uba_softc { 67 device_t uh_dev; /* Device struct, autoconfig */ 68 struct evcnt uh_intrcnt; /* interrupt counting */ 69 SIMPLEQ_HEAD(, uba_unit) uh_resq; /* resource wait chain */ 70 SIMPLEQ_HEAD(, uba_reset) uh_resetq; /* ubareset queue */ 71 int uh_lastiv; /* last free interrupt vector */ 72 int (*uh_errchk)(struct uba_softc *); 73 void (*uh_beforescan)(struct uba_softc *); 74 void (*uh_afterscan)(struct uba_softc *); 75 void (*uh_ubainit)(struct uba_softc *); 76 void (*uh_ubapurge)(struct uba_softc *, int); 77 short uh_nr; /* Unibus sequential number */ 78 short uh_type; /* Type of bus */ 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 char *uh_used; /* I/O addresses used */ 83 }; 84 85 /* 86 * Per-controller structure. 87 * The unit struct is common to both the adapter and the controller 88 * to which it belongs. It is only used on controllers that handles 89 * BDP's, and calls the adapter queueing subroutines. 90 */ 91 struct uba_unit { 92 SIMPLEQ_ENTRY(uba_unit) uu_resq;/* Queue while waiting for resources */ 93 device_t uu_dev; /* unit's device_t */ 94 int uu_bdp; /* for controllers that hang on to bdp's */ 95 int (*uu_ready)(struct uba_unit *); 96 void *uu_ref; /* Buffer this is related to */ 97 short uu_xclu; /* want exclusive use of bdp's */ 98 short uu_keepbdp; /* hang on to bdp's once allocated */ 99 }; 100 101 /* 102 * Reset structure. All devices that needs to be reinitialized 103 * after an ubareset registers with this struct. 104 */ 105 struct uba_reset { 106 SIMPLEQ_ENTRY(uba_reset) ur_resetq; 107 void (*ur_reset)(device_t); 108 device_t ur_dev; 109 }; 110 111 /* 112 * uba_attach_args is used during autoconfiguration. It is sent 113 * from ubascan() to each (possible) device. 114 */ 115 struct uba_attach_args { 116 bus_space_tag_t ua_iot; /* Tag for this bus I/O-space */ 117 bus_addr_t ua_ioh; /* I/O regs addr */ 118 bus_dma_tag_t ua_dmat; /* DMA tag for this bus'es dma */ 119 struct evcnt *ua_evcnt; 120 void *ua_icookie; /* Cookie for interrupt establish */ 121 int ua_iaddr; /* Full CSR address of device */ 122 int ua_br; /* IPL this dev interrupted on */ 123 int ua_cvec; /* Vector for this device */ 124 }; 125 126 /* 127 * Flags to UBA map/bdp allocation routines 128 */ 129 #define UBA_NEEDBDP 0x01 /* transfer needs a bdp */ 130 #define UBA_CANTWAIT 0x02 /* don't block me */ 131 #define UBA_NEED16 0x04 /* need 16 bit addresses only */ 132 #define UBA_HAVEBDP 0x08 /* use bdp specified in high bits */ 133 #define UBA_DONTQUE 0x10 /* Do not enqueue xfer */ 134 135 /* 136 * Type of adapter. 137 */ 138 #define UBA_UBA 0 /* Traditional unibus adapter */ 139 #define UBA_MVI 1 /* MVI direct-mapped unibus */ 140 #define UBA_QBUS 2 /* Qbus with map registers */ 141 /* 142 * Struct for unibus allocation. 143 */ 144 struct ubinfo { 145 bus_dmamap_t ui_dmam; 146 bus_dma_segment_t ui_seg; 147 int ui_rseg; 148 void *ui_vaddr; 149 bus_addr_t ui_baddr; 150 bus_size_t ui_size; 151 }; 152 153 /* 154 * Some common defines for all subtypes of U/Q-buses/adapters. 155 */ 156 #define MAXUBAXFER (63*1024) /* Max transfer size in bytes */ 157 #define ubdevreg(addr) ((addr) & 017777) 158 159 #ifdef _KERNEL 160 void uba_intr_establish(void *, int, void (*)(void *), void *, struct evcnt *); 161 void uba_reset_establish(void (*)(device_t), device_t); 162 void uba_attach(struct uba_softc *, unsigned long); 163 void uba_enqueue(struct uba_unit *); 164 void uba_done(struct uba_softc *); 165 void ubareset(struct uba_softc *); 166 int uballoc(struct uba_softc *, struct ubinfo *, int); 167 int ubmemalloc(struct uba_softc *, struct ubinfo *, int); 168 void ubfree(struct uba_softc *, struct ubinfo *); 169 void ubmemfree(struct uba_softc *, struct ubinfo *); 170 #endif /* _KERNEL */ 171 172 #endif /* _QBUS_UBAVAR_H */ 173