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 | |