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
siop_table_sync(struct siop_cmd * siop_cmd,int ops)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