The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/qbus/ubavar.h

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    1 /*      $NetBSD: ubavar.h,v 1.34 2003/08/28 14:59:07 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. 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         struct  device 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) __P((struct uba_softc *));
   73         void    (*uh_beforescan) __P((struct uba_softc *));
   74         void    (*uh_afterscan) __P((struct uba_softc *));
   75         void    (*uh_ubainit) __P((struct uba_softc *));
   76         void    (*uh_ubapurge) __P((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         void    *uu_softc;      /* Pointer to units softc */
   94         int     uu_bdp;         /* for controllers that hang on to bdp's */
   95         int    (*uu_ready) __P((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)(struct device *);
  108         struct device *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         caddr_t 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 (*)(struct device *), struct device *);
  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 */

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