Annotation of sys/dev/ic/siopvar.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: siopvar.h,v 1.13 2005/11/20 22:32:48 krw Exp $ */
2: /* $NetBSD: siopvar.h,v 1.22 2005/11/18 23:10:32 bouyer Exp $ */
3:
4: /*
5: * Copyright (c) 2000 Manuel Bouyer.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by Manuel Bouyer.
18: * 4. The name of the author may not be used to endorse or promote products
19: * derived from this software without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31: *
32: */
33:
34: /* structure and definitions for the siop driver */
35:
36: /* Number of tag */
37: #define SIOP_NTAG 16
38:
39: /*
40: * xfer description of the script: tables and reselect script
41: * In struct siop_common_cmd siop_xfer will point to this.
42: */
43: struct siop_xfer {
44: struct siop_common_xfer siop_tables;
45: /* u_int32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */
46: /* Add some entries to make size 384 bytes (256+128) */
47: u_int32_t resel[36];
48: } __packed;
49:
50: /*
51: * This describes a command handled by the SCSI controller
52: * These are chained in either a free list or an active list
53: * We have one queue per target
54: */
55:
56: struct siop_cmd {
57: TAILQ_ENTRY (siop_cmd) next;
58: struct siop_common_cmd cmd_c;
59: struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */
60: int reselslot;
61: u_int32_t saved_offset; /* offset in table after disc without sdp */
62: };
63: #define cmd_tables cmd_c.siop_tables
64:
65: /* command block descriptors: an array of siop_cmd + an array of siop_xfer */
66: struct siop_cbd {
67: TAILQ_ENTRY (siop_cbd) next;
68: struct siop_cmd *cmds;
69: struct siop_xfer *xfers;
70: bus_dmamap_t xferdma; /* DMA map for this block of xfers */
71: };
72:
73: /* per-tag struct */
74: struct siop_tag {
75: struct siop_cmd *active; /* active command */
76: u_int reseloff;
77: };
78:
79: /* per lun struct */
80: struct siop_lun {
81: struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */
82: int lun_flags;
83: #define SIOP_LUNF_FULL 0x01 /* queue full message */
84: u_int reseloff;
85: };
86:
87: /*
88: * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
89: * will point to this
90: */
91: struct siop_target {
92: struct siop_common_target target_c;
93: struct siop_lun *siop_lun[8]; /* per-lun state */
94: u_int reseloff;
95: struct siop_lunsw *lunsw;
96: };
97:
98: struct siop_lunsw {
99: TAILQ_ENTRY (siop_lunsw) next;
100: u_int32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/
101: u_int32_t lunsw_size; /* size of this lun sw */
102: };
103:
104:
105: TAILQ_HEAD(cmd_list, siop_cmd);
106: TAILQ_HEAD(cbd_list, siop_cbd);
107: TAILQ_HEAD(lunsw_list, siop_lunsw);
108:
109:
110: /* Driver internal state */
111: struct siop_softc {
112: struct siop_common_softc sc_c;
113: int sc_currschedslot; /* current scheduler slot */
114: struct cbd_list cmds; /* list of command block descriptors */
115: struct cmd_list free_list; /* cmd descr free list */
116: struct cmd_list urgent_list; /* high priority cmd descr list */
117: struct cmd_list ready_list; /* cmd descr ready list */
118: struct lunsw_list lunsw_list; /* lunsw free list */
119: u_int32_t script_free_lo; /* free ram offset from sc_scriptaddr */
120: u_int32_t script_free_hi; /* free ram offset from sc_scriptaddr */
121: int sc_ntargets; /* number of known targets */
122: u_int32_t sc_flags;
123: };
124:
125: /* defs for sc_flags */
126: #define SCF_CHAN_NOSLOT 0x0001 /* channel out of scheduler slot */
127:
128: void siop_attach(struct siop_softc *);
129: int siop_intr(void *);
130: void siop_add_dev(struct siop_softc *, int, int);
131: void siop_del_dev(struct siop_softc *, int, int);
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