204 lines
7.0 KiB
C
204 lines
7.0 KiB
C
/* $NetBSD: siopvar_common.h,v 1.11 2001/04/25 17:53:34 bouyer 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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/* common struct and routines used by siop and esiop */
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#ifndef SIOP_DEFAULT_TARGET
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#define SIOP_DEFAULT_TARGET 7
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#endif
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/* tables used by SCRIPT */
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typedef struct scr_table {
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u_int32_t count;
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u_int32_t addr;
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} scr_table_t ;
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/* Number of scatter/gather entries */
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#define SIOP_NSG (MAXPHYS/NBPG + 1) /* XXX NBPG */
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/* Number of tag */
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#define SIOP_NTAG 16
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/*
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* This structure interfaces the SCRIPT with the driver; it describes a full
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* transfer.
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*/
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struct siop_xfer_common {
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u_int8_t msg_out[8]; /* 0 */
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u_int8_t msg_in[8]; /* 8 */
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u_int32_t status; /* 16 */
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u_int32_t pad1; /* 20 */
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u_int32_t id; /* 24 */
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u_int32_t pad2; /* 28 */
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scr_table_t t_msgin; /* 32 */
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scr_table_t t_extmsgin; /* 40 */
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scr_table_t t_extmsgdata; /* 48 */
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scr_table_t t_msgout; /* 56 */
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scr_table_t cmd; /* 64 */
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scr_table_t t_status; /* 72 */
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scr_table_t data[SIOP_NSG]; /* 80 */
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} __attribute__((__packed__));
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/* status can hold the SCSI_* status values, and 2 additionnal values: */
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#define SCSI_SIOP_NOCHECK 0xfe /* don't check the scsi status */
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#define SCSI_SIOP_NOSTATUS 0xff /* device didn't report status */
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/* xfer description of the script: tables and reselect script */
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struct siop_xfer {
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struct siop_xfer_common 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 decribes 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_softc *siop_sc; /* points back to our adapter */
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struct siop_target *siop_target; /* pointer to our target def */
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struct scsipi_xfer *xs; /* xfer from the upper level */
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struct siop_xfer *siop_xfer; /* tables dealing with this xfer */
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#define siop_tables siop_xfer->tables
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struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */
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bus_addr_t dsa; /* DSA value to load */
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bus_dmamap_t dmamap_cmd;
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bus_dmamap_t dmamap_data;
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int status;
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int flags;
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int reselslot; /* the reselect slot used */
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int tag; /* tag used for tagged command queuing */
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};
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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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/* status defs */
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#define CMDST_FREE 0 /* cmd slot is free */
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#define CMDST_READY 1 /* cmd slot is waiting for processing */
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#define CMDST_ACTIVE 2 /* cmd slot is being processed */
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#define CMDST_DONE 3 /* cmd slot has been processed */
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/* flags defs */
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#define CMDFL_TIMEOUT 0x0001 /* cmd timed out */
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#define CMDFL_TAG 0x0002 /* tagged cmd */
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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; /* XXX */
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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; /* XXX */
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};
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/* per-target struct */
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struct siop_target {
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int status; /* target status, see below */
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int flags; /* target flags, see below */
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u_int32_t id; /* for SELECT FROM */
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int period;
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int offset;
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struct siop_lun *siop_lun[8]; /* per-lun state */
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u_int reseloff; /* XXX */
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struct siop_lunsw *lunsw; /* XXX */
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};
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/* target status */
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#define TARST_PROBING 0 /* target is being probed */
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#define TARST_ASYNC 1 /* target needs sync/wide negotiation */
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#define TARST_WIDE_NEG 2 /* target is doing wide negotiation */
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#define TARST_SYNC_NEG 3 /* target is doing sync negotiation */
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#define TARST_OK 4 /* sync/wide agreement is valid */
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/* target flags */
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#define TARF_SYNC 0x01 /* target can do sync */
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#define TARF_WIDE 0x02 /* target can do wide */
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#define TARF_TAG 0x04 /* target can do tags */
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#define TARF_ISWIDE 0x08 /* target is wide */
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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 __P((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_softc *sc = siop_cmd->siop_sc;
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bus_addr_t offset;
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offset = siop_cmd->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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void siop_common_reset __P((struct siop_softc *));
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void siop_setuptables __P((struct siop_cmd *));
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int siop_modechange __P((struct siop_softc *));
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int siop_wdtr_neg __P((struct siop_cmd *));
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int siop_sdtr_neg __P((struct siop_cmd *));
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void siop_sdtr_msg __P((struct siop_cmd *, int, int, int));
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void siop_wdtr_msg __P((struct siop_cmd *, int, int));
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void siop_update_xfer_mode __P((struct siop_softc *, int));
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/* actions to take at return of siop_wdtr_neg() and siop_sdtr_neg() */
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#define SIOP_NEG_NOP 0x0
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#define SIOP_NEG_MSGOUT 0x1
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#define SIOP_NEG_ACK 0x2
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void siop_minphys __P((struct buf *));
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int siop_ioctl __P((struct scsipi_channel *, u_long,
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caddr_t, int, struct proc *));
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void siop_sdp __P((struct siop_cmd *));
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void siop_clearfifo __P((struct siop_softc *));
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void siop_resetbus __P((struct siop_softc *));
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/* XXXX should be callbacks */
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void siop_add_dev __P((struct siop_softc *, int, int));
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void siop_del_dev __P((struct siop_softc *, int, int));
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