Return to vbavar.h CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / sys / tahoevba

Annotation of 43BSDTahoe/sys/tahoevba/vbavar.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  *
        !            17:  *     @(#)vbavar.h    7.2 (Berkeley) 6/29/88
        !            18:  */
        !            19: 
        !            20: /*
        !            21:  * This file contains definitions related to the kernel structures
        !            22:  * for dealing with the VERSAbus adapters.
        !            23:  *
        !            24:  * Each VERSAbus has a vba_hd structure.
        !            25:  * Each VERSAbus controller which is not a device has a vba_ctlr structure.
        !            26:  * Each VERSAbus device has a vba_device structure.
        !            27:  */
        !            28: 
        !            29: #ifndef LOCORE
        !            30: /*
        !            31:  * Per-vba structure.
        !            32:  */
        !            33: struct vba_hd {
        !            34:        int     vh_lastiv;              /* last interrupt vector assigned */
        !            35: };
        !            36: 
        !            37: /*
        !            38:  * Per-controller structure.
        !            39:  * (E.g. one for each disk and tape controller, and other things
        !            40:  * which use and release buffered data paths.)
        !            41:  *
        !            42:  * If a controller has devices attached, then there are
        !            43:  * cross-referenced vba_drive structures.
        !            44:  * This structure is the one which is queued in VERSAbus resource wait,
        !            45:  * and saves the information about VERSAbus resources which are used.
        !            46:  * The queue of devices waiting to transfer is also attached here.
        !            47:  */
        !            48: struct vba_ctlr {
        !            49:        struct  vba_driver *um_driver;
        !            50:        short   um_ctlr;        /* controller index in driver */
        !            51:        short   um_vbanum;      /* the vba it is on */
        !            52:        short   um_alive;       /* controller exists */
        !            53:        int     (**um_intr)();  /* interrupt handler(s) */
        !            54:        caddr_t um_addr;        /* address of device in i/o space */
        !            55:        struct  vba_hd *um_hd;
        !            56: /* the driver saves the prototype command here for use in its go routine */
        !            57:        int     um_cmd;         /* communication to dgo() */
        !            58:        int     um_vbinfo;      /* save VERSAbus registers, etc */
        !            59:        struct  buf um_tab;     /* queue of devices for this controller */
        !            60: };
        !            61: 
        !            62: /*
        !            63:  * Per ``device'' structure.
        !            64:  * (A controller has devices or uses and releases buffered data paths).
        !            65:  * (Everything else is a ``device''.)
        !            66:  *
        !            67:  * If a controller has many drives attached, then there will
        !            68:  * be several vba_device structures associated with a single vba_ctlr
        !            69:  * structure.
        !            70:  *
        !            71:  * This structure contains all the information necessary to run
        !            72:  * a VERSAbus device.  It also contains information
        !            73:  * for slaves of VERSAbus controllers as to which device on the slave
        !            74:  * this is.  A flags field here can also be given in the system specification
        !            75:  * and is used to tell which tty lines are hard wired or other device
        !            76:  * specific parameters.
        !            77:  */
        !            78: struct vba_device {
        !            79:        struct  vba_driver *ui_driver;
        !            80:        short   ui_unit;        /* unit number on the system */
        !            81:        short   ui_ctlr;        /* mass ctlr number; -1 if none */
        !            82:        short   ui_vbanum;      /* the vba it is on */
        !            83:        short   ui_slave;       /* slave on controller */
        !            84:        int     (**ui_intr)();  /* interrupt handler(s) */
        !            85:        caddr_t ui_addr;        /* address of device in i/o space */
        !            86:        short   ui_dk;          /* if init 1 set to number for iostat */
        !            87:        long    ui_flags;       /* parameter from system specification */
        !            88:        short   ui_alive;       /* device exists */
        !            89:        short   ui_type;        /* driver specific type information */
        !            90:        caddr_t ui_physaddr;    /* phys addr, for standalone (dump) code */
        !            91: /* this is the forward link in a list of devices on a controller */
        !            92:        struct  vba_device *ui_forw;
        !            93: /* if the device is connected to a controller, this is the controller */
        !            94:        struct  vba_ctlr *ui_mi;
        !            95:        struct  vba_hd *ui_hd;
        !            96: };
        !            97: #endif
        !            98: 
        !            99: /*
        !           100:  * Per-driver structure.
        !           101:  *
        !           102:  * Each VERSAbus driver defines entries for a set of routines
        !           103:  * as well as an array of types which are acceptable to it.
        !           104:  * These are used at boot time by the configuration program.
        !           105:  */
        !           106: struct vba_driver {
        !           107:        int     (*ud_probe)();          /* see if a driver is really there */
        !           108:        int     (*ud_slave)();          /* see if a slave is there */
        !           109:        int     (*ud_attach)();         /* setup driver for a slave */
        !           110:        int     (*ud_dgo)();            /* fill csr/ba to start transfer */
        !           111:        long    *ud_addr;               /* device csr addresses */
        !           112:        char    *ud_dname;              /* name of a device */
        !           113:        struct  vba_device **ud_dinfo;  /* backpointers to vbdinit structs */
        !           114:        char    *ud_mname;              /* name of a controller */
        !           115:        struct  vba_ctlr **ud_minfo;    /* backpointers to vbminit structs */
        !           116: };
        !           117: 
        !           118: /*
        !           119:  * Common state for Versabus driver I/O resources,
        !           120:  * including memory for intermediate buffer and page map,
        !           121:  * allocated by vbainit.
        !           122:  */
        !           123: struct vb_buf {
        !           124:        /* these fields set up once by vbinit */
        !           125:        int     vb_flags;               /* device parameters */
        !           126:        struct  pte *vb_map;            /* private page entries */
        !           127:        caddr_t vb_utl;                 /* virtual addresses mapped by vb_map */
        !           128:        caddr_t vb_rawbuf;              /* intermediate buffer */
        !           129:        u_long  vb_physbuf;             /* phys addr of intermediate buffer */
        !           130:        u_long  vb_bufsize;             /* intermediate buffer size */
        !           131:        u_long  vb_maxphys;             /* physical address limit */
        !           132:        /* remaining fields apply to current transfer: */
        !           133:        int     vb_copy;                /* copy to/from intermediate buffer */
        !           134:        int     vb_iskernel;            /* is to/from kernel address space */
        !           135: };
        !           136: 
        !           137: /*
        !           138:  * flags to vbinit
        !           139:  */
        !           140: #define        VB_32BIT        0x00            /* device uses 32-bit addressing */
        !           141: #define        VB_24BIT        0x01            /* device uses 24-bit addressing */
        !           142: #define        VB_20BIT        0x02            /* device uses 20-bit addressing */
        !           143: #define        VB_SCATTER      0x04            /* device does scatter-gather */
        !           144: 
        !           145: /*
        !           146:  * hardware addressing limits
        !           147:  */
        !           148: #define        VB_MAXADDR20    0x000fffff      /* highest addr for 20-bit */
        !           149: #define        VB_MAXADDR24    0x007fffff      /* highest addr for 23/24-bit */
        !           150: #define        VB_MAXADDR32    0x3effffff      /* highest addr for 32-bit */
        !           151: 
        !           152: /*
        !           153:  * Statistics on vba operations.
        !           154:  */
        !           155: struct vbastat {
        !           156:        u_long  k_raw;          /* to/from contiguous kernel DMA buffer */
        !           157:        u_long  u_raw;          /* to/from contiguous user DMA buffer */
        !           158:        u_long  k_copy;         /* copied to/from kernel */
        !           159:        u_long  u_copy;         /* copied to/from user */
        !           160:        u_long  k_sg;           /* scatter-gather to/from kernel */
        !           161:        u_long  u_sg;           /* scatter-gather to/from user */
        !           162: };
        !           163: 
        !           164: #ifndef LOCORE
        !           165: #ifdef KERNEL
        !           166: /*
        !           167:  * VBA related kernel variables
        !           168:  */
        !           169: int    numvba;                                 /* number of uba's */
        !           170: struct vba_hd vba_hd[];
        !           171: struct vbastat vbastat;
        !           172: 
        !           173: /*
        !           174:  * Vbminit and vbdinit initialize the mass storage controller and
        !           175:  * device tables specifying possible devices.
        !           176:  */
        !           177: extern struct  vba_ctlr vbminit[];
        !           178: extern struct  vba_device vbdinit[];
        !           179: 
        !           180: /*
        !           181:  * VERSAbus device address space is mapped by VMEMmap
        !           182:  * into virtual address vmem[][].
        !           183:  */
        !           184: extern struct pte VMEMmap[];   /* vba device addr pte's */
        !           185: extern caddr_t vmem;           /* vba device addr space */
        !           186: u_long vbasetup();
        !           187: #endif KERNEL
        !           188: #endif !LOCORE

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.