1 /* $NetBSD: aic6360var.h,v 1.9 2001/04/30 03:45:35 lukem Exp $ */
2
3 /*
4 * Copyright (c) 1994, 1995, 1996 Charles M. Hannum. All rights reserved.
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 Charles M. Hannum.
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 * Copyright (c) 1994 Jarle Greipsland
21 * All rights reserved.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the above copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. The name of the author may not be used to endorse or promote products
32 * derived from this software without specific prior written permission.
33 *
34 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
35 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
36 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
37 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
38 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
39 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
40 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
42 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
43 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
44 * POSSIBILITY OF SUCH DAMAGE.
45 */
46
47 /*
48 * Acknowledgements: Many of the algorithms used in this driver are
49 * inspired by the work of Julian Elischer (julian@tfs.com) and
50 * Charles Hannum (mycroft@duality.gnu.ai.mit.edu). Thanks a million!
51 */
52
53 typedef u_long physaddr;
54 typedef u_long physlen;
55
56 struct aic_dma_seg {
57 physaddr seg_addr;
58 physlen seg_len;
59 };
60
61 #define AIC_NSEG 16
62
63 /*
64 * ACB. Holds additional information for each SCSI command Comments: We
65 * need a separate scsi command block because we may need to overwrite it
66 * with a request sense command. Basicly, we refrain from fiddling with
67 * the scsipi_xfer struct (except do the expected updating of return values).
68 * We'll generally update: xs->{flags,resid,error,sense,status} and
69 * occasionally xs->retries.
70 */
71 struct aic_acb {
72 struct scsi_generic scsipi_cmd;
73 int scsipi_cmd_length;
74 u_char *data_addr; /* Saved data pointer */
75 int data_length; /* Residue */
76
77 u_char target_stat; /* SCSI status byte */
78
79 #ifdef notdef
80 struct aic_dma_seg dma[AIC_NSEG]; /* Physical addresses+len */
81 #endif
82
83 TAILQ_ENTRY(aic_acb) chain;
84 struct scsipi_xfer *xs; /* SCSI xfer ctrl block from above */
85 int flags;
86 #define ACB_ALLOC 0x01
87 #define ACB_NEXUS 0x02
88 #define ACB_SENSE 0x04
89 #define ACB_ABORT 0x40
90 #define ACB_RESET 0x80
91 int timeout;
92 };
93
94 /*
95 * Some info about each (possible) target on the SCSI bus. This should
96 * probably have been a "per target+lunit" structure, but we'll leave it at
97 * this for now.
98 */
99 struct aic_tinfo {
100 int cmds; /* #commands processed */
101 int dconns; /* #disconnects */
102 int touts; /* #timeouts */
103 int perrs; /* #parity errors */
104 int senses; /* #request sense commands sent */
105 ushort lubusy; /* What local units/subr. are busy? */
106 u_char flags;
107 #define DO_SYNC 0x01 /* (Re)Negotiate synchronous options */
108 #define DO_WIDE 0x02 /* (Re)Negotiate wide options */
109 u_char period; /* Period suggestion */
110 u_char offset; /* Offset suggestion */
111 u_char width; /* Width suggestion */
112 };
113
114 struct aic_softc {
115 struct device sc_dev;
116
117 bus_space_tag_t sc_iot;
118 bus_space_handle_t sc_ioh;
119
120 struct scsipi_adapter sc_adapter;
121 struct scsipi_channel sc_channel;
122
123 TAILQ_HEAD(, aic_acb) free_list, ready_list, nexus_list;
124 struct aic_acb *sc_nexus; /* current command */
125 struct aic_acb sc_acb[8];
126 struct aic_tinfo sc_tinfo[8];
127
128 /* Data about the current nexus (updated for every cmd switch) */
129 u_char *sc_dp; /* Current data pointer */
130 size_t sc_dleft; /* Data bytes left to transfer */
131 u_char *sc_cp; /* Current command pointer */
132 size_t sc_cleft; /* Command bytes left to transfer */
133
134 /* Adapter state */
135 u_char sc_phase; /* Current bus phase */
136 u_char sc_prevphase; /* Previous bus phase */
137 u_char sc_state; /* State applicable to the adapter */
138 #define AIC_INIT 0
139 #define AIC_IDLE 1
140 #define AIC_SELECTING 2 /* SCSI command is arbiting */
141 #define AIC_RESELECTED 3 /* Has been reselected */
142 #define AIC_CONNECTED 4 /* Actively using the SCSI bus */
143 #define AIC_DISCONNECT 5 /* MSG_DISCONNECT received */
144 #define AIC_CMDCOMPLETE 6 /* MSG_CMDCOMPLETE received */
145 #define AIC_CLEANING 7
146 u_char sc_flags;
147 #define AIC_DROP_MSGIN 0x01 /* Discard all msgs (parity err detected) */
148 #define AIC_ABORTING 0x02 /* Bailing out */
149 #define AIC_DOINGDMA 0x04 /* The FIFO data path is active! */
150 u_char sc_selid; /* Reselection ID */
151 struct device *sc_child;/* Our child */
152
153 /* Message stuff */
154 u_char sc_msgpriq; /* Messages we want to send */
155 u_char sc_msgoutq; /* Messages sent during last MESSAGE OUT */
156 u_char sc_lastmsg; /* Message last transmitted */
157 u_char sc_currmsg; /* Message currently ready to transmit */
158 #define SEND_DEV_RESET 0x01
159 #define SEND_PARITY_ERROR 0x02
160 #define SEND_INIT_DET_ERR 0x04
161 #define SEND_REJECT 0x08
162 #define SEND_IDENTIFY 0x10
163 #define SEND_ABORT 0x20
164 #define SEND_SDTR 0x40
165 #define SEND_WDTR 0x80
166 #define AIC_MAX_MSG_LEN 8
167 u_char sc_omess[AIC_MAX_MSG_LEN];
168 u_char *sc_omp; /* Outgoing message pointer */
169 u_char sc_imess[AIC_MAX_MSG_LEN];
170 u_char *sc_imp; /* Incoming message pointer */
171
172 /* Hardware stuff */
173 int sc_initiator; /* Our scsi id */
174 int sc_freq; /* Clock frequency in MHz */
175 int sc_minsync; /* Minimum sync period / 4 */
176 int sc_maxsync; /* Maximum sync period / 4 */
177 };
178
179 #if AIC_DEBUG
180 #define AIC_SHOWACBS 0x01
181 #define AIC_SHOWINTS 0x02
182 #define AIC_SHOWCMDS 0x04
183 #define AIC_SHOWMISC 0x08
184 #define AIC_SHOWTRACE 0x10
185 #define AIC_SHOWSTART 0x20
186 #define AIC_DOBREAK 0x40
187 extern int aic_debug; /* AIC_SHOWSTART|AIC_SHOWMISC|AIC_SHOWTRACE; */
188 #define AIC_PRINT(b, s) do { \
189 if ((aic_debug & (b)) != 0) \
190 printf s; \
191 } while (/* CONSTCOND */ 0)
192 #define AIC_BREAK() do { \
193 if ((aic_debug & AIC_DOBREAK) != 0) \
194 Debugger(); \
195 } while (/* CONSTCOND */ 0)
196 #define AIC_ASSERT(x) do { \
197 if (! (x)) { \
198 printf("%s at line %d: assertion failed\n", \
199 sc->sc_dev.dv_xname, __LINE__); \
200 Debugger(); \
201 } } while (/* CONSTCOND */ 0)
202 #else
203 #define AIC_PRINT(b, s) /* NOTHING */
204 #define AIC_BREAK() /* NOTHING */
205 #define AIC_ASSERT(x) /* NOTHING */
206 #endif
207
208 #define AIC_ACBS(s) AIC_PRINT(AIC_SHOWACBS, s)
209 #define AIC_INTS(s) AIC_PRINT(AIC_SHOWINTS, s)
210 #define AIC_CMDS(s) AIC_PRINT(AIC_SHOWCMDS, s)
211 #define AIC_MISC(s) AIC_PRINT(AIC_SHOWMISC, s)
212 #define AIC_TRACE(s) AIC_PRINT(AIC_SHOWTRACE, s)
213 #define AIC_START(s) AIC_PRINT(AIC_SHOWSTART, s)
214
215 #define AIC_ISA_IOSIZE 0x20 /* XXX */
216
217 void aicattach __P((struct aic_softc *));
218 int aic_activate __P((struct device *, enum devact));
219 int aic_detach __P((struct device *, int));
220 int aicintr __P((void *));
221 int aic_find __P((bus_space_tag_t, bus_space_handle_t));
222 void aic_isa_attach __P((struct device *, struct device *, void *));
223 void aic_init __P((struct aic_softc *, int));
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