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

     /*      $NetBSD: ubavar.h,v 1.34 2003/08/28 14:59:07 ragge Exp $        */
     
     /*
      * Copyright (c) 1982, 1986 Regents of the University of California.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)ubavar.h    7.7 (Berkeley) 6/28/90
     */
    #ifndef _QBUS_UBAVAR_H
    #define _QBUS_UBAVAR_H
    
    /*
     * This file contains definitions related to the kernel structures
     * for dealing with the unibus adapters.
     *
     * Each uba has a uba_softc structure.
     * Each unibus controller which is not a device has a uba_ctlr structure.
     * Each unibus device has a uba_device structure.
     */
    
    /*
     * Per-uba structure.
     *
     * This structure holds the interrupt vector for the uba,
     * and its address in physical and virtual space.  At boot time
     * we determine the devices attached to the uba's and their
     * interrupt vectors, filling in uh_vec.  We free the map
     * register and bdp resources of the uba into the structures
     * defined here.
     *
     * During normal operation, resources are allocated and returned
     * to the structures here.  We watch the number of passive releases
     * on each uba, and if the number is excessive may reset the uba.
     * 
     * When uba resources are needed and not available, or if a device
     * which can tolerate no other uba activity (rk07) gets on the bus,
     * then device drivers may have to wait to get to the bus and are
     * queued here.  It is also possible for processes to block in
     * the unibus driver in resource wait (mrwant, bdpwant); these
     * wait states are also recorded here.
     */
    struct  uba_softc {
            struct  device uh_dev;          /* Device struct, autoconfig */
            struct  evcnt uh_intrcnt;               /* interrupt counting */
            SIMPLEQ_HEAD(, uba_unit) uh_resq;       /* resource wait chain */
            SIMPLEQ_HEAD(, uba_reset) uh_resetq;    /* ubareset queue */
            int     uh_lastiv;              /* last free interrupt vector */
            int     (*uh_errchk) __P((struct uba_softc *));
            void    (*uh_beforescan) __P((struct uba_softc *));
            void    (*uh_afterscan) __P((struct uba_softc *));
            void    (*uh_ubainit) __P((struct uba_softc *));
            void    (*uh_ubapurge) __P((struct uba_softc *, int));
            short   uh_nr;                  /* Unibus sequential number */
            short   uh_type;                /* Type of bus */
            bus_space_tag_t uh_iot;         /* Tag for this Unibus */
            bus_space_handle_t uh_ioh;      /* Handle for I/O space */
            bus_dma_tag_t   uh_dmat;
            char    *uh_used;               /* I/O addresses used */
    };
    
    /*
     * Per-controller structure.
     * The unit struct is common to both the adapter and the controller
     * to which it belongs. It is only used on controllers that handles
     * BDP's, and calls the adapter queueing subroutines.
     */
    struct  uba_unit {
            SIMPLEQ_ENTRY(uba_unit) uu_resq;/* Queue while waiting for resources */
            void    *uu_softc;      /* Pointer to units softc */
            int     uu_bdp;         /* for controllers that hang on to bdp's */
            int    (*uu_ready) __P((struct uba_unit *));
            void    *uu_ref;        /* Buffer this is related to */
            short   uu_xclu;        /* want exclusive use of bdp's */
            short   uu_keepbdp;     /* hang on to bdp's once allocated */
    };
   
   /*
    * Reset structure. All devices that needs to be reinitialized
    * after an ubareset registers with this struct.
    */
   struct  uba_reset {
           SIMPLEQ_ENTRY(uba_reset) ur_resetq;
           void (*ur_reset)(struct device *);
           struct device *ur_dev;
   };
   
   /*
    * uba_attach_args is used during autoconfiguration. It is sent
    * from ubascan() to each (possible) device.
    */
   struct uba_attach_args {
           bus_space_tag_t ua_iot;         /* Tag for this bus I/O-space */
           bus_addr_t      ua_ioh;         /* I/O regs addr */
           bus_dma_tag_t   ua_dmat;        /* DMA tag for this bus'es dma */
           struct evcnt    *ua_evcnt;
           void            *ua_icookie;    /* Cookie for interrupt establish */
           int             ua_iaddr;       /* Full CSR address of device */
           int             ua_br;          /* IPL this dev interrupted on */
           int             ua_cvec;        /* Vector for this device */
   };
   
   /*
    * Flags to UBA map/bdp allocation routines
    */
   #define UBA_NEEDBDP     0x01            /* transfer needs a bdp */
   #define UBA_CANTWAIT    0x02            /* don't block me */
   #define UBA_NEED16      0x04            /* need 16 bit addresses only */
   #define UBA_HAVEBDP     0x08            /* use bdp specified in high bits */
   #define UBA_DONTQUE     0x10            /* Do not enqueue xfer */
   
   /*
    * Type of adapter.
    */
   #define UBA_UBA         0               /* Traditional unibus adapter */
   #define UBA_MVI         1               /* MVI direct-mapped unibus */
   #define UBA_QBUS        2               /* Qbus with map registers */
   /*
    * Struct for unibus allocation.
    */
   struct ubinfo {
           bus_dmamap_t ui_dmam;
           bus_dma_segment_t ui_seg;
           int ui_rseg;
           caddr_t ui_vaddr;
           bus_addr_t ui_baddr;
           bus_size_t ui_size;
   };
   
   /*
    * Some common defines for all subtypes of U/Q-buses/adapters.
    */
   #define MAXUBAXFER      (63*1024)       /* Max transfer size in bytes */
   #define ubdevreg(addr) ((addr) & 017777)
   
   #ifdef _KERNEL
   void uba_intr_establish(void *, int, void (*)(void *), void *, struct evcnt *);
   void uba_reset_establish(void (*)(struct device *), struct device *);
   void uba_attach(struct uba_softc *, unsigned long);
   void uba_enqueue(struct uba_unit *);
   void uba_done(struct uba_softc *);
   void ubareset(struct uba_softc *);
   int uballoc(struct uba_softc *, struct ubinfo *, int);
   int ubmemalloc(struct uba_softc *, struct ubinfo *, int);
   void ubfree(struct uba_softc *, struct ubinfo *);
   void ubmemfree(struct uba_softc *, struct ubinfo *);
   #endif /* _KERNEL */
   
   #endif /* _QBUS_UBAVAR_H */

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