1 /* $NetBSD: siopvar.h,v 1.18 2002/04/23 20:41:15 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 2000 Manuel Bouyer. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Manuel Bouyer. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 */ 32 33 /* structure and definitions for the siop driver */ 34 35 /* Number of tag */ 36 #define SIOP_NTAG 16 37 38 /* 39 * xfer description of the script: tables and reselect script 40 * In struct siop_common_cmd siop_xfer will point to this. 41 */ 42 struct siop_xfer { 43 struct siop_common_xfer siop_tables; 44 /* u_int32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */ 45 u_int32_t resel[25]; 46 } __attribute__((__packed__)); 47 48 /* 49 * This decribes a command handled by the SCSI controller 50 * These are chained in either a free list or a active list 51 * We have one queue per target 52 */ 53 54 struct siop_cmd { 55 TAILQ_ENTRY (siop_cmd) next; 56 struct siop_common_cmd cmd_c; 57 struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */ 58 int reselslot; 59 }; 60 #define cmd_tables cmd_c.siop_tables 61 62 /* command block descriptors: an array of siop_cmd + an array of siop_xfer */ 63 struct siop_cbd { 64 TAILQ_ENTRY (siop_cbd) next; 65 struct siop_cmd *cmds; 66 struct siop_xfer *xfers; 67 bus_dmamap_t xferdma; /* DMA map for this block of xfers */ 68 }; 69 70 /* per-tag struct */ 71 struct siop_tag { 72 struct siop_cmd *active; /* active command */ 73 u_int reseloff; 74 }; 75 76 /* per lun struct */ 77 struct siop_lun { 78 struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */ 79 int lun_flags; /* per-lun flags, none currently */ 80 u_int reseloff; 81 }; 82 83 /* 84 * per target struct; siop_common_cmd->target and siop_common_softc->targets[] 85 * will point to this 86 */ 87 struct siop_target { 88 struct siop_common_target target_c; 89 struct siop_lun *siop_lun[8]; /* per-lun state */ 90 u_int reseloff; 91 struct siop_lunsw *lunsw; 92 }; 93 94 struct siop_lunsw { 95 TAILQ_ENTRY (siop_lunsw) next; 96 u_int32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/ 97 u_int32_t lunsw_size; /* size of this lun sw */ 98 }; 99 100 static __inline__ void siop_table_sync __P((struct siop_cmd *, int)); 101 static __inline__ void 102 siop_table_sync(siop_cmd, ops) 103 struct siop_cmd *siop_cmd; 104 int ops; 105 { 106 struct siop_common_softc *sc = siop_cmd->cmd_c.siop_sc; 107 bus_addr_t offset; 108 109 offset = siop_cmd->cmd_c.dsa - 110 siop_cmd->siop_cbdp->xferdma->dm_segs[0].ds_addr; 111 bus_dmamap_sync(sc->sc_dmat, siop_cmd->siop_cbdp->xferdma, offset, 112 sizeof(struct siop_xfer), ops); 113 } 114 115 116 TAILQ_HEAD(cmd_list, siop_cmd); 117 TAILQ_HEAD(cbd_list, siop_cbd); 118 TAILQ_HEAD(lunsw_list, siop_lunsw); 119 120 121 /* Driver internal state */ 122 struct siop_softc { 123 struct siop_common_softc sc_c; 124 int sc_currschedslot; /* current scheduler slot */ 125 struct cbd_list cmds; /* list of command block descriptors */ 126 struct cmd_list free_list; /* cmd descr free list */ 127 struct lunsw_list lunsw_list; /* lunsw free list */ 128 u_int32_t script_free_lo; /* free ram offset from sc_scriptaddr */ 129 u_int32_t script_free_hi; /* free ram offset from sc_scriptaddr */ 130 int sc_ntargets; /* number of known targets */ 131 u_int32_t sc_flags; 132 }; 133 134 /* defs for sc_flags */ 135 #define SCF_CHAN_NOSLOT 0x0001 /* channel out of sheduler slot */ 136 137 void siop_attach __P((struct siop_softc *)); 138 int siop_intr __P((void *)); 139 void siop_add_dev __P((struct siop_softc *, int, int)); 140 void siop_del_dev __P((struct siop_softc *, int, int)); 141