1 /* $OpenBSD: siopvar.h,v 1.17 2011/09/23 10:40:06 miod 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 /* structure and definitions for the siop driver */ 30 31 /* Number of tag */ 32 #define SIOP_NTAG 16 33 34 /* 35 * wrap up the bus_dma api. 36 */ 37 struct siop_dmamem { 38 bus_dmamap_t sdm_map; 39 bus_dma_segment_t sdm_seg; 40 size_t sdm_size; 41 caddr_t sdm_kva; 42 }; 43 #define SIOP_DMA_MAP(_sdm) ((_sdm)->sdm_map) 44 #define SIOP_DMA_DVA(_sdm) ((_sdm)->sdm_map->dm_segs[0].ds_addr) 45 #define SIOP_DMA_KVA(_sdm) ((void *)(_sdm)->sdm_kva) 46 47 /* 48 * xfer description of the script: tables and reselect script 49 * In struct siop_common_cmd siop_xfer will point to this. 50 */ 51 struct siop_xfer { 52 struct siop_common_xfer siop_tables; 53 /* u_int32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */ 54 /* Add some entries to make size 384 bytes (244+140) */ 55 u_int32_t resel[35]; 56 } __packed; 57 58 /* 59 * This describes a command handled by the SCSI controller 60 * These are chained in either a free list or an active list 61 * We have one queue per target 62 */ 63 64 struct siop_cmd { 65 TAILQ_ENTRY (siop_cmd) next; 66 struct siop_common_cmd cmd_c; 67 struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */ 68 int reselslot; 69 u_int32_t saved_offset; /* offset in table after disc without sdp */ 70 }; 71 #define cmd_tables cmd_c.siop_tables 72 73 /* command block descriptors: an array of siop_cmd, siop_xfer, and sense */ 74 struct siop_cbd { 75 TAILQ_ENTRY (siop_cbd) next; 76 struct siop_cmd *cmds; 77 struct siop_dmamem *xfers; 78 struct siop_dmamem *sense; 79 }; 80 81 /* per-tag struct */ 82 struct siop_tag { 83 struct siop_cmd *active; /* active command */ 84 u_int reseloff; 85 }; 86 87 /* per lun struct */ 88 struct siop_lun { 89 struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */ 90 int lun_flags; 91 #define SIOP_LUNF_FULL 0x01 /* queue full message */ 92 u_int reseloff; 93 }; 94 95 /* 96 * per target struct; siop_common_cmd->target and siop_common_softc->targets[] 97 * will point to this 98 */ 99 struct siop_target { 100 struct siop_common_target target_c; 101 struct siop_lun *siop_lun[8]; /* per-lun state */ 102 u_int reseloff; 103 struct siop_lunsw *lunsw; 104 }; 105 106 struct siop_lunsw { 107 TAILQ_ENTRY (siop_lunsw) next; 108 u_int32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/ 109 u_int32_t lunsw_size; /* size of this lun sw */ 110 }; 111 112 113 TAILQ_HEAD(cmd_list, siop_cmd); 114 TAILQ_HEAD(cbd_list, siop_cbd); 115 TAILQ_HEAD(lunsw_list, siop_lunsw); 116 117 118 /* Driver internal state */ 119 struct siop_softc { 120 struct siop_common_softc sc_c; 121 int sc_currschedslot; /* current scheduler slot */ 122 struct cbd_list cmds; /* list of command block descriptors */ 123 struct cmd_list free_list; /* cmd descr free list */ 124 struct cmd_list urgent_list; /* high priority cmd descr list */ 125 struct cmd_list ready_list; /* cmd descr ready list */ 126 struct scsi_iopool iopool; /* cmd pool */ 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 scheduler slot */ 136 137 void siop_attach(struct siop_softc *); 138 int siop_intr(void *); 139 void siop_add_dev(struct siop_softc *, int, int); 140 void siop_del_dev(struct siop_softc *, int, int); 141