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siopvar.h revision 1.25.10.1 
      1 /*	$NetBSD: siopvar.h,v 1.25.10.1 2009/05/04 08:12:44 yamt 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  * 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 SIOP_NTAG 16
     37 
     38 /*
     39  * xfer description of the script: tables and reselect script
     40  * In struct siop_common_cmd siop_xfer will point to this.
     41  */
     42 struct siop_xfer {
     43 	struct siop_common_xfer siop_tables;
     44 	/* u_int32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */
     45 	u_int32_t resel[25];
     46 } __packed;
     47 
     48 /*
     49  * This describes a command handled by the SCSI controller
     50  * These are chained in either a free list or a active list
     51  * We have one queue per target
     52  */
     53 
     54 struct siop_cmd {
     55 	TAILQ_ENTRY (siop_cmd) next;
     56 	struct siop_common_cmd cmd_c;
     57 	struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */
     58 	int reselslot;
     59 	u_int32_t saved_offset; /* offset in table after disc without sdp */
     60 };
     61 #define cmd_tables cmd_c.siop_tables
     62 
     63 /* command block descriptors: an array of siop_cmd + an array of siop_xfer */
     64 struct siop_cbd {
     65 	TAILQ_ENTRY (siop_cbd) next;
     66 	struct siop_cmd *cmds;
     67 	struct siop_xfer *xfers;
     68 	bus_dmamap_t xferdma; /* DMA map for this block of xfers */
     69 };
     70 
     71 /* per-tag struct */
     72 struct siop_tag {
     73 	struct siop_cmd *active; /* active command */
     74 	u_int reseloff;
     75 };
     76 
     77 /* per lun struct */
     78 struct siop_lun {
     79 	struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */
     80 	int lun_flags; /* per-lun flags, none currently */
     81 	u_int reseloff;
     82 };
     83 
     84 /*
     85  * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
     86  * will point to this
     87  */
     88 struct siop_target {
     89 	struct siop_common_target target_c;
     90 	struct siop_lun *siop_lun[8]; /* per-lun state */
     91 	u_int reseloff;
     92 	struct siop_lunsw *lunsw;
     93 };
     94 
     95 struct siop_lunsw {
     96 	TAILQ_ENTRY (siop_lunsw) next;
     97 	u_int32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/
     98 	u_int32_t lunsw_size; /* size of this lun sw */
     99 };
    100 
    101 static __inline void siop_table_sync(struct siop_cmd *, int);
    102 static __inline void
    103 siop_table_sync(struct siop_cmd *siop_cmd, int ops)
    104 {
    105 	struct siop_common_softc *sc  = siop_cmd->cmd_c.siop_sc;
    106 	bus_addr_t offset;
    107 
    108 	offset = siop_cmd->cmd_c.dsa -
    109 	    siop_cmd->siop_cbdp->xferdma->dm_segs[0].ds_addr;
    110 	bus_dmamap_sync(sc->sc_dmat, siop_cmd->siop_cbdp->xferdma, offset,
    111 	    sizeof(struct siop_xfer), ops);
    112 }
    113 
    114 
    115 TAILQ_HEAD(cmd_list, siop_cmd);
    116 TAILQ_HEAD(cbd_list, siop_cbd);
    117 TAILQ_HEAD(lunsw_list, siop_lunsw);
    118 
    119 
    120 /* Driver internal state */
    121 struct siop_softc {
    122 	struct siop_common_softc sc_c;
    123 	int sc_currschedslot;		/* current scheduler slot */
    124 	struct cbd_list cmds;		/* list of command block descriptors */
    125 	struct cmd_list free_list;	/* cmd descr free list */
    126 	struct lunsw_list lunsw_list;	/* lunsw free list */
    127 	u_int32_t script_free_lo;	/* free ram offset from sc_scriptaddr */
    128 	u_int32_t script_free_hi;	/* free ram offset from sc_scriptaddr */
    129 	int sc_ntargets;		/* number of known targets */
    130 	u_int32_t sc_flags;
    131 };
    132 
    133 /* defs for sc_flags */
    134 #define SCF_CHAN_NOSLOT	0x0001		/* channel out of scheduler slot */
    135 
    136 void    siop_attach(struct siop_softc *);
    137 int	siop_intr(void *);
    138 void	siop_add_dev(struct siop_softc *, int, int);
    139 void	siop_del_dev(struct siop_softc *, int, int);
    140