1/* $NetBSD: siopvar.h,v 1.27 2009/09/04 18:40:19 tsutsui 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 */ 27 28/* structure and definitions for the siop driver */ 29 30/* Number of tag */ 31#define SIOP_NTAG 16 32 33/* 34 * xfer description of the script: tables and reselect script 35 * In struct siop_common_cmd siop_xfer will point to this. 36 */ 37struct siop_xfer { 38 struct siop_common_xfer siop_tables; 39 /* uint32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */ 40 uint32_t resel[25]; 41} __packed; 42 43/* 44 * This describes a command handled by the SCSI controller 45 * These are chained in either a free list or a active list 46 * We have one queue per target 47 */ 48 49struct siop_cmd { 50 TAILQ_ENTRY (siop_cmd) next; 51 struct siop_common_cmd cmd_c; 52 struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */ 53 int reselslot; 54 uint32_t saved_offset; /* offset in table after disc without sdp */ 55}; 56#define cmd_tables cmd_c.siop_tables 57 58/* command block descriptors: an array of siop_cmd + an array of siop_xfer */ 59struct siop_cbd { 60 TAILQ_ENTRY (siop_cbd) next; 61 struct siop_cmd *cmds; 62 struct siop_xfer *xfers; 63 bus_dmamap_t xferdma; /* DMA map for this block of xfers */ 64}; 65 66/* per-tag struct */ 67struct siop_tag { 68 struct siop_cmd *active; /* active command */ 69 u_int reseloff; 70}; 71 72/* per lun struct */ 73struct siop_lun { 74 struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */ 75 int lun_flags; /* per-lun flags, none currently */ 76 u_int reseloff; 77}; 78 79/* 80 * per target struct; siop_common_cmd->target and siop_common_softc->targets[] 81 * will point to this 82 */ 83struct siop_target { 84 struct siop_common_target target_c; 85 struct siop_lun *siop_lun[8]; /* per-lun state */ 86 u_int reseloff; 87 struct siop_lunsw *lunsw; 88}; 89 90struct siop_lunsw { 91 TAILQ_ENTRY (siop_lunsw) next; 92 uint32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/ 93 uint32_t lunsw_size; /* size of this lun sw */ 94}; 95 96static __inline void siop_table_sync(struct siop_cmd *, int); 97static __inline void 98siop_table_sync(struct siop_cmd *siop_cmd, int ops) 99{ 100 struct siop_common_softc *sc = siop_cmd->cmd_c.siop_sc; 101 bus_addr_t offset; 102 103 offset = siop_cmd->cmd_c.dsa - 104 siop_cmd->siop_cbdp->xferdma->dm_segs[0].ds_addr; 105 bus_dmamap_sync(sc->sc_dmat, siop_cmd->siop_cbdp->xferdma, offset, 106 sizeof(struct siop_xfer), ops); 107} 108 109 110TAILQ_HEAD(cmd_list, siop_cmd); 111TAILQ_HEAD(cbd_list, siop_cbd); 112TAILQ_HEAD(lunsw_list, siop_lunsw); 113 114 115/* Driver internal state */ 116struct siop_softc { 117 struct siop_common_softc sc_c; 118 int sc_currschedslot; /* current scheduler slot */ 119 struct cbd_list cmds; /* list of command block descriptors */ 120 struct cmd_list free_list; /* cmd descr free list */ 121 struct lunsw_list lunsw_list; /* lunsw free list */ 122 uint32_t script_free_lo; /* free ram offset from sc_scriptaddr */ 123 uint32_t script_free_hi; /* free ram offset from sc_scriptaddr */ 124 int sc_ntargets; /* number of known targets */ 125 uint32_t sc_flags; 126}; 127 128/* defs for sc_flags */ 129#define SCF_CHAN_NOSLOT 0x0001 /* channel out of scheduler slot */ 130 131void siop_attach(struct siop_softc *); 132int siop_intr(void *); 133void siop_add_dev(struct siop_softc *, int, int); 134void siop_del_dev(struct siop_softc *, int, int); 135