142 lines
4.7 KiB
C
142 lines
4.7 KiB
C
/* $NetBSD: siopvar.h,v 1.24 2006/02/16 20:17:16 perry Exp $ */
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/*
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* Copyright (c) 2000 Manuel Bouyer.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Manuel Bouyer.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/* structure and definitions for the siop driver */
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/* Number of tag */
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#define SIOP_NTAG 16
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/*
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* xfer description of the script: tables and reselect script
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* In struct siop_common_cmd siop_xfer will point to this.
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*/
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struct siop_xfer {
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struct siop_common_xfer siop_tables;
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/* u_int32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */
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u_int32_t resel[25];
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} __attribute__((__packed__));
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/*
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* This describes a command handled by the SCSI controller
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* These are chained in either a free list or a active list
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* We have one queue per target
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*/
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struct siop_cmd {
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TAILQ_ENTRY (siop_cmd) next;
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struct siop_common_cmd cmd_c;
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struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */
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int reselslot;
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u_int32_t saved_offset; /* offset in table after disc without sdp */
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};
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#define cmd_tables cmd_c.siop_tables
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/* command block descriptors: an array of siop_cmd + an array of siop_xfer */
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struct siop_cbd {
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TAILQ_ENTRY (siop_cbd) next;
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struct siop_cmd *cmds;
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struct siop_xfer *xfers;
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bus_dmamap_t xferdma; /* DMA map for this block of xfers */
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};
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/* per-tag struct */
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struct siop_tag {
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struct siop_cmd *active; /* active command */
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u_int reseloff;
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};
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/* per lun struct */
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struct siop_lun {
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struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */
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int lun_flags; /* per-lun flags, none currently */
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u_int reseloff;
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};
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/*
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* per target struct; siop_common_cmd->target and siop_common_softc->targets[]
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* will point to this
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*/
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struct siop_target {
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struct siop_common_target target_c;
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struct siop_lun *siop_lun[8]; /* per-lun state */
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u_int reseloff;
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struct siop_lunsw *lunsw;
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};
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struct siop_lunsw {
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TAILQ_ENTRY (siop_lunsw) next;
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u_int32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/
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u_int32_t lunsw_size; /* size of this lun sw */
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};
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static __inline void siop_table_sync(struct siop_cmd *, int);
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static __inline void
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siop_table_sync(siop_cmd, ops)
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struct siop_cmd *siop_cmd;
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int ops;
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{
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struct siop_common_softc *sc = siop_cmd->cmd_c.siop_sc;
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bus_addr_t offset;
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offset = siop_cmd->cmd_c.dsa -
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siop_cmd->siop_cbdp->xferdma->dm_segs[0].ds_addr;
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bus_dmamap_sync(sc->sc_dmat, siop_cmd->siop_cbdp->xferdma, offset,
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sizeof(struct siop_xfer), ops);
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}
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TAILQ_HEAD(cmd_list, siop_cmd);
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TAILQ_HEAD(cbd_list, siop_cbd);
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TAILQ_HEAD(lunsw_list, siop_lunsw);
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/* Driver internal state */
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struct siop_softc {
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struct siop_common_softc sc_c;
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int sc_currschedslot; /* current scheduler slot */
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struct cbd_list cmds; /* list of command block descriptors */
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struct cmd_list free_list; /* cmd descr free list */
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struct lunsw_list lunsw_list; /* lunsw free list */
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u_int32_t script_free_lo; /* free ram offset from sc_scriptaddr */
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u_int32_t script_free_hi; /* free ram offset from sc_scriptaddr */
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int sc_ntargets; /* number of known targets */
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u_int32_t sc_flags;
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};
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/* defs for sc_flags */
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#define SCF_CHAN_NOSLOT 0x0001 /* channel out of scheduler slot */
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void siop_attach(struct siop_softc *);
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int siop_intr(void *);
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void siop_add_dev(struct siop_softc *, int, int);
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void siop_del_dev(struct siop_softc *, int, int);
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