FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/siopvar.h
1 /* $NetBSD: siopvar.h,v 1.19 2003/11/02 11:07:46 wiz 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 } __attribute__((__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 };
60 #define cmd_tables cmd_c.siop_tables
61
62 /* command block descriptors: an array of siop_cmd + an array of siop_xfer */
63 struct siop_cbd {
64 TAILQ_ENTRY (siop_cbd) next;
65 struct siop_cmd *cmds;
66 struct siop_xfer *xfers;
67 bus_dmamap_t xferdma; /* DMA map for this block of xfers */
68 };
69
70 /* per-tag struct */
71 struct siop_tag {
72 struct siop_cmd *active; /* active command */
73 u_int reseloff;
74 };
75
76 /* per lun struct */
77 struct siop_lun {
78 struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */
79 int lun_flags; /* per-lun flags, none currently */
80 u_int reseloff;
81 };
82
83 /*
84 * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
85 * will point to this
86 */
87 struct siop_target {
88 struct siop_common_target target_c;
89 struct siop_lun *siop_lun[8]; /* per-lun state */
90 u_int reseloff;
91 struct siop_lunsw *lunsw;
92 };
93
94 struct siop_lunsw {
95 TAILQ_ENTRY (siop_lunsw) next;
96 u_int32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/
97 u_int32_t lunsw_size; /* size of this lun sw */
98 };
99
100 static __inline__ void siop_table_sync __P((struct siop_cmd *, int));
101 static __inline__ void
102 siop_table_sync(siop_cmd, ops)
103 struct siop_cmd *siop_cmd;
104 int ops;
105 {
106 struct siop_common_softc *sc = siop_cmd->cmd_c.siop_sc;
107 bus_addr_t offset;
108
109 offset = siop_cmd->cmd_c.dsa -
110 siop_cmd->siop_cbdp->xferdma->dm_segs[0].ds_addr;
111 bus_dmamap_sync(sc->sc_dmat, siop_cmd->siop_cbdp->xferdma, offset,
112 sizeof(struct siop_xfer), ops);
113 }
114
115
116 TAILQ_HEAD(cmd_list, siop_cmd);
117 TAILQ_HEAD(cbd_list, siop_cbd);
118 TAILQ_HEAD(lunsw_list, siop_lunsw);
119
120
121 /* Driver internal state */
122 struct siop_softc {
123 struct siop_common_softc sc_c;
124 int sc_currschedslot; /* current scheduler slot */
125 struct cbd_list cmds; /* list of command block descriptors */
126 struct cmd_list free_list; /* cmd descr free list */
127 struct lunsw_list lunsw_list; /* lunsw free list */
128 u_int32_t script_free_lo; /* free ram offset from sc_scriptaddr */
129 u_int32_t script_free_hi; /* free ram offset from sc_scriptaddr */
130 int sc_ntargets; /* number of known targets */
131 u_int32_t sc_flags;
132 };
133
134 /* defs for sc_flags */
135 #define SCF_CHAN_NOSLOT 0x0001 /* channel out of scheduler slot */
136
137 void siop_attach __P((struct siop_softc *));
138 int siop_intr __P((void *));
139 void siop_add_dev __P((struct siop_softc *, int, int));
140 void siop_del_dev __P((struct siop_softc *, int, int));
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