Annotation of sys/dev/ic/siopvar.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: siopvar.h,v 1.13 2005/11/20 22:32:48 krw Exp $ */
! 2: /* $NetBSD: siopvar.h,v 1.22 2005/11/18 23:10:32 bouyer Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 2000 Manuel Bouyer.
! 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 Manuel Bouyer.
! 18: * 4. The name of the author may not be used to endorse or promote products
! 19: * derived from this software without specific prior written permission.
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 22: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 23: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 24: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 25: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 26: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 27: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 28: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 29: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 30: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 31: *
! 32: */
! 33:
! 34: /* structure and definitions for the siop driver */
! 35:
! 36: /* Number of tag */
! 37: #define SIOP_NTAG 16
! 38:
! 39: /*
! 40: * xfer description of the script: tables and reselect script
! 41: * In struct siop_common_cmd siop_xfer will point to this.
! 42: */
! 43: struct siop_xfer {
! 44: struct siop_common_xfer siop_tables;
! 45: /* u_int32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */
! 46: /* Add some entries to make size 384 bytes (256+128) */
! 47: u_int32_t resel[36];
! 48: } __packed;
! 49:
! 50: /*
! 51: * This describes a command handled by the SCSI controller
! 52: * These are chained in either a free list or an active list
! 53: * We have one queue per target
! 54: */
! 55:
! 56: struct siop_cmd {
! 57: TAILQ_ENTRY (siop_cmd) next;
! 58: struct siop_common_cmd cmd_c;
! 59: struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */
! 60: int reselslot;
! 61: u_int32_t saved_offset; /* offset in table after disc without sdp */
! 62: };
! 63: #define cmd_tables cmd_c.siop_tables
! 64:
! 65: /* command block descriptors: an array of siop_cmd + an array of siop_xfer */
! 66: struct siop_cbd {
! 67: TAILQ_ENTRY (siop_cbd) next;
! 68: struct siop_cmd *cmds;
! 69: struct siop_xfer *xfers;
! 70: bus_dmamap_t xferdma; /* DMA map for this block of xfers */
! 71: };
! 72:
! 73: /* per-tag struct */
! 74: struct siop_tag {
! 75: struct siop_cmd *active; /* active command */
! 76: u_int reseloff;
! 77: };
! 78:
! 79: /* per lun struct */
! 80: struct siop_lun {
! 81: struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */
! 82: int lun_flags;
! 83: #define SIOP_LUNF_FULL 0x01 /* queue full message */
! 84: u_int reseloff;
! 85: };
! 86:
! 87: /*
! 88: * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
! 89: * will point to this
! 90: */
! 91: struct siop_target {
! 92: struct siop_common_target target_c;
! 93: struct siop_lun *siop_lun[8]; /* per-lun state */
! 94: u_int reseloff;
! 95: struct siop_lunsw *lunsw;
! 96: };
! 97:
! 98: struct siop_lunsw {
! 99: TAILQ_ENTRY (siop_lunsw) next;
! 100: u_int32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/
! 101: u_int32_t lunsw_size; /* size of this lun sw */
! 102: };
! 103:
! 104:
! 105: TAILQ_HEAD(cmd_list, siop_cmd);
! 106: TAILQ_HEAD(cbd_list, siop_cbd);
! 107: TAILQ_HEAD(lunsw_list, siop_lunsw);
! 108:
! 109:
! 110: /* Driver internal state */
! 111: struct siop_softc {
! 112: struct siop_common_softc sc_c;
! 113: int sc_currschedslot; /* current scheduler slot */
! 114: struct cbd_list cmds; /* list of command block descriptors */
! 115: struct cmd_list free_list; /* cmd descr free list */
! 116: struct cmd_list urgent_list; /* high priority cmd descr list */
! 117: struct cmd_list ready_list; /* cmd descr ready list */
! 118: struct lunsw_list lunsw_list; /* lunsw free list */
! 119: u_int32_t script_free_lo; /* free ram offset from sc_scriptaddr */
! 120: u_int32_t script_free_hi; /* free ram offset from sc_scriptaddr */
! 121: int sc_ntargets; /* number of known targets */
! 122: u_int32_t sc_flags;
! 123: };
! 124:
! 125: /* defs for sc_flags */
! 126: #define SCF_CHAN_NOSLOT 0x0001 /* channel out of scheduler slot */
! 127:
! 128: void siop_attach(struct siop_softc *);
! 129: int siop_intr(void *);
! 130: void siop_add_dev(struct siop_softc *, int, int);
! 131: void siop_del_dev(struct siop_softc *, int, int);
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