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      1 /*	$NetBSD: siopvar.h,v 1.29 2012/08/24 09:01:23 msaitoh 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  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  *
     26  */
     27 
     28 /* structure and definitions for the siop driver */
     29 
     30 /* Number of tag */
     31 #define SIOP_NTAG 16
     32 
     33 /*
     34  * xfer description of the script: tables and reselect script
     35  * In struct siop_common_cmd siop_xfer will point to this.
     36  */
     37 struct siop_xfer {
     38 	struct siop_common_xfer siop_tables;
     39 	/* uint32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */
     40 	uint32_t resel[25];
     41 } __packed;
     42 
     43 /*
     44  * This describes a command handled by the SCSI controller
     45  * These are chained in either a free list or an active list
     46  * We have one queue per target
     47  */
     48 
     49 struct siop_cmd {
     50 	TAILQ_ENTRY (siop_cmd) next;
     51 	struct siop_common_cmd cmd_c;
     52 	struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */
     53 	int reselslot;
     54 	uint32_t saved_offset; /* offset in table after disc without sdp */
     55 };
     56 #define cmd_tables cmd_c.siop_tables
     57 
     58 /* command block descriptors: an array of siop_cmd + an array of siop_xfer */
     59 struct siop_cbd {
     60 	TAILQ_ENTRY (siop_cbd) next;
     61 	struct siop_cmd *cmds;
     62 	struct siop_xfer *xfers;
     63 	bus_dmamap_t xferdma; /* DMA map for this block of xfers */
     64 };
     65 
     66 /* per-tag struct */
     67 struct siop_tag {
     68 	struct siop_cmd *active; /* active command */
     69 	u_int reseloff;
     70 };
     71 
     72 /* per lun struct */
     73 struct siop_lun {
     74 	struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */
     75 	int lun_flags; /* per-lun flags, none currently */
     76 	u_int reseloff;
     77 };
     78 
     79 /*
     80  * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
     81  * will point to this
     82  */
     83 struct siop_target {
     84 	struct siop_common_target target_c;
     85 	struct siop_lun *siop_lun[8]; /* per-lun state */
     86 	u_int reseloff;
     87 	struct siop_lunsw *lunsw;
     88 };
     89 
     90 struct siop_lunsw {
     91 	TAILQ_ENTRY (siop_lunsw) next;
     92 	uint32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/
     93 	uint32_t lunsw_size; /* size of this lun sw */
     94 };
     95 
     96 static __inline void siop_table_sync(struct siop_cmd *, int);
     97 static __inline void
     98 siop_table_sync(struct siop_cmd *siop_cmd, int ops)
     99 {
    100 	struct siop_common_softc *sc  = siop_cmd->cmd_c.siop_sc;
    101 	bus_addr_t offset;
    102 
    103 	offset = siop_cmd->cmd_c.dsa -
    104 	    siop_cmd->siop_cbdp->xferdma->dm_segs[0].ds_addr;
    105 	bus_dmamap_sync(sc->sc_dmat, siop_cmd->siop_cbdp->xferdma, offset,
    106 	    sizeof(struct siop_xfer), ops);
    107 }
    108 
    109 
    110 TAILQ_HEAD(cmd_list, siop_cmd);
    111 TAILQ_HEAD(cbd_list, siop_cbd);
    112 TAILQ_HEAD(lunsw_list, siop_lunsw);
    113 
    114 
    115 /* Driver internal state */
    116 struct siop_softc {
    117 	struct siop_common_softc sc_c;
    118 	int sc_currschedslot;		/* current scheduler slot */
    119 	struct cbd_list cmds;		/* list of command block descriptors */
    120 	struct cmd_list free_list;	/* cmd descr free list */
    121 	struct lunsw_list lunsw_list;	/* lunsw free list */
    122 	uint32_t script_free_lo;	/* free ram offset from sc_scriptaddr */
    123 	uint32_t script_free_hi;	/* free ram offset from sc_scriptaddr */
    124 	int sc_ntargets;		/* number of known targets */
    125 	uint32_t sc_flags;
    126 };
    127 
    128 /* defs for sc_flags */
    129 #define SCF_CHAN_NOSLOT	0x0001		/* channel out of scheduler slot */
    130 
    131 void    siop_attach(struct siop_softc *);
    132 int	siop_intr(void *);
    133 void	siop_add_dev(struct siop_softc *, int, int);
    134 void	siop_del_dev(struct siop_softc *, int, int);
    135