FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/siopvar.h
1 /* $OpenBSD: siopvar.h,v 1.17 2011/09/23 10:40:06 miod 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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 */
28
29 /* structure and definitions for the siop driver */
30
31 /* Number of tag */
32 #define SIOP_NTAG 16
33
34 /*
35 * wrap up the bus_dma api.
36 */
37 struct siop_dmamem {
38 bus_dmamap_t sdm_map;
39 bus_dma_segment_t sdm_seg;
40 size_t sdm_size;
41 caddr_t sdm_kva;
42 };
43 #define SIOP_DMA_MAP(_sdm) ((_sdm)->sdm_map)
44 #define SIOP_DMA_DVA(_sdm) ((_sdm)->sdm_map->dm_segs[0].ds_addr)
45 #define SIOP_DMA_KVA(_sdm) ((void *)(_sdm)->sdm_kva)
46
47 /*
48 * xfer description of the script: tables and reselect script
49 * In struct siop_common_cmd siop_xfer will point to this.
50 */
51 struct siop_xfer {
52 struct siop_common_xfer siop_tables;
53 /* u_int32_t resel[sizeof(load_dsa) / sizeof(load_dsa[0])]; */
54 /* Add some entries to make size 384 bytes (244+140) */
55 u_int32_t resel[35];
56 } __packed;
57
58 /*
59 * This describes a command handled by the SCSI controller
60 * These are chained in either a free list or an active list
61 * We have one queue per target
62 */
63
64 struct siop_cmd {
65 TAILQ_ENTRY (siop_cmd) next;
66 struct siop_common_cmd cmd_c;
67 struct siop_cbd *siop_cbdp; /* pointer to our siop_cbd */
68 int reselslot;
69 u_int32_t saved_offset; /* offset in table after disc without sdp */
70 };
71 #define cmd_tables cmd_c.siop_tables
72
73 /* command block descriptors: an array of siop_cmd, siop_xfer, and sense */
74 struct siop_cbd {
75 TAILQ_ENTRY (siop_cbd) next;
76 struct siop_cmd *cmds;
77 struct siop_dmamem *xfers;
78 struct siop_dmamem *sense;
79 };
80
81 /* per-tag struct */
82 struct siop_tag {
83 struct siop_cmd *active; /* active command */
84 u_int reseloff;
85 };
86
87 /* per lun struct */
88 struct siop_lun {
89 struct siop_tag siop_tag[SIOP_NTAG]; /* tag array */
90 int lun_flags;
91 #define SIOP_LUNF_FULL 0x01 /* queue full message */
92 u_int reseloff;
93 };
94
95 /*
96 * per target struct; siop_common_cmd->target and siop_common_softc->targets[]
97 * will point to this
98 */
99 struct siop_target {
100 struct siop_common_target target_c;
101 struct siop_lun *siop_lun[8]; /* per-lun state */
102 u_int reseloff;
103 struct siop_lunsw *lunsw;
104 };
105
106 struct siop_lunsw {
107 TAILQ_ENTRY (siop_lunsw) next;
108 u_int32_t lunsw_off; /* offset of this lun sw, from sc_scriptaddr*/
109 u_int32_t lunsw_size; /* size of this lun sw */
110 };
111
112
113 TAILQ_HEAD(cmd_list, siop_cmd);
114 TAILQ_HEAD(cbd_list, siop_cbd);
115 TAILQ_HEAD(lunsw_list, siop_lunsw);
116
117
118 /* Driver internal state */
119 struct siop_softc {
120 struct siop_common_softc sc_c;
121 int sc_currschedslot; /* current scheduler slot */
122 struct cbd_list cmds; /* list of command block descriptors */
123 struct cmd_list free_list; /* cmd descr free list */
124 struct cmd_list urgent_list; /* high priority cmd descr list */
125 struct cmd_list ready_list; /* cmd descr ready list */
126 struct scsi_iopool iopool; /* cmd pool */
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(struct siop_softc *);
138 int siop_intr(void *);
139 void siop_add_dev(struct siop_softc *, int, int);
140 void siop_del_dev(struct siop_softc *, int, int);
Cache object: 9968ac2e3ee446d10914414d75ab2c96
|