esiopvar.h revision 1.2
1 /* $NetBSD: esiopvar.h,v 1.2 2002/04/22 15:53:40 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 2002 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 ESIOP_NTAG 256 37 38 /* 39 * description of a command scheduler slot. The script uses a ring of 40 * A_ncmd_slots of this. 41 */ 42 struct esiop_slot { 43 u_int32_t dsa; /* DSA of the xfer. The first 2 bits holds flags */ 44 u_int32_t id; /* for SELECT */ 45 } __attribute__((__packed__)); 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 esiop_xfer { 52 struct siop_common_xfer siop_tables; 53 u_int32_t tlq; /* target/lun/tag loaded in scratchC by script */ 54 } __attribute__((__packed__)); 55 56 /* 57 * This decribes a command handled by the SCSI controller 58 * These are chained in either a free list or a active list 59 * We have one queue per target 60 */ 61 62 struct esiop_cmd { 63 TAILQ_ENTRY (esiop_cmd) next; 64 struct siop_common_cmd cmd_c; 65 struct esiop_cbd *esiop_cbdp; /* pointer to our siop_cbd */ 66 }; 67 #define cmd_tables cmd_c.siop_tables 68 69 /* command block descriptors: an array of siop_cmd + an array of siop_xfer */ 70 struct esiop_cbd { 71 TAILQ_ENTRY (esiop_cbd) next; 72 struct esiop_cmd *cmds; 73 struct esiop_xfer *xfers; 74 bus_dmamap_t xferdma; /* DMA map for this block of xfers */ 75 }; 76 77 TAILQ_HEAD(cmd_list, esiop_cmd); 78 TAILQ_HEAD(cbd_list, esiop_cbd); 79 80 /* DSA table descriptor for tags. Free tables are in a list */ 81 struct esiop_dsatbl { 82 TAILQ_ENTRY (esiop_dsatbl) next; 83 u_int32_t *tbl; /* the table itself */ 84 u_int32_t tbl_dsa; /* DSA of base of this table */ 85 bus_addr_t tbl_offset; /* offset of this table in the map */ 86 struct esiop_dsatblblk *tblblk; /* pointer back to our block */ 87 }; 88 89 /* DSA table block descriptor. */ 90 struct esiop_dsatblblk { 91 TAILQ_ENTRY (esiop_dsatblblk) next; 92 bus_dmamap_t blkmap; /* DMA map of this block */ 93 }; 94 95 TAILQ_HEAD(tbl_list, esiop_dsatbl); 96 TAILQ_HEAD(tblblk_list, esiop_dsatblblk); 97 98 /* Number of table per block */ 99 #define ESIOP_NTPB ((PAGE_SIZE) / (sizeof(u_int32_t) * ESIOP_NTAG)) 100 101 /* per lun struct */ 102 struct esiop_lun { 103 struct esiop_cmd *active; /* active non-tagged command */ 104 struct esiop_cmd *tactive[ESIOP_NTAG]; /* active tagged commands */ 105 int lun_flags; /* per-lun flags */ 106 #define LUNF_TAGTABLE 0x01 /* the LUN DSA points to the tag table */ 107 struct esiop_dsatbl *lun_tagtbl; /* the tag DSA table */ 108 }; 109 110 /* 111 * per target struct; siop_common_cmd->target and siop_common_softc->targets[] 112 * will point to this 113 */ 114 struct esiop_target { 115 struct siop_common_target target_c; 116 struct esiop_lun *esiop_lun[8]; /* per-lun state */ 117 u_int32_t lun_table_offset; /* pointer to our DSA table */ 118 }; 119 120 static __inline__ void esiop_table_sync __P((struct esiop_cmd *, int)); 121 static __inline__ void 122 esiop_table_sync(esiop_cmd, ops) 123 struct esiop_cmd *esiop_cmd; 124 int ops; 125 { 126 struct siop_common_softc *sc = esiop_cmd->cmd_c.siop_sc; 127 bus_addr_t offset; 128 129 offset = esiop_cmd->cmd_c.dsa - 130 esiop_cmd->esiop_cbdp->xferdma->dm_segs[0].ds_addr; 131 bus_dmamap_sync(sc->sc_dmat, esiop_cmd->esiop_cbdp->xferdma, offset, 132 sizeof(struct esiop_xfer), ops); 133 } 134 135 136 137 /* Driver internal state */ 138 struct esiop_softc { 139 struct siop_common_softc sc_c; 140 u_int32_t sc_shedoffset; /* base of scheduler ring */ 141 int sc_currschedslot; /* current scheduler slot */ 142 struct cbd_list cmds; /* list of command block descriptors */ 143 struct cmd_list free_list; /* cmd descr free list */ 144 struct tbl_list free_tagtbl; /* list of free tag DSA tables */ 145 struct tblblk_list tag_tblblk; /* tag DSA table blocks */ 146 u_int32_t sc_flags; 147 u_int32_t sc_free_offset; /* pointer to free RAM */ 148 u_int32_t sc_target_table_offset;/* pointer to target DSA table */ 149 }; 150 151 /* defs for sc_flags */ 152 #define SCF_CHAN_NOSLOT 0x0001 /* channel out of sheduler slot */ 153 154 void esiop_attach __P((struct esiop_softc *)); 155 int esiop_intr __P((void *)); 156 void esiop_add_dev __P((struct esiop_softc *, int, int)); 157 void esiop_del_dev __P((struct esiop_softc *, int, int)); 158
Indexes created Tue Sep 30 20:09:53 GMT 2025