1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* $OpenBSD: sbicvar.h,v 1.8 2009/02/16 21:19:06 miod Exp $ */
/*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Van Jacobson of Lawrence Berkeley Laboratory.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)scsivar.h 7.1 (Berkeley) 5/8/90
*/
#ifndef _SBICVAR_H_
#define _SBICVAR_H_
#include <sys/malloc.h>
/*
* DMA chains are used for Scatter-Gather DMA.
*/
struct dma_chain {
int dc_count;
char *dc_addr;
};
/*
* ACB. Holds additional information for each SCSI command Comments: We
* need a separate scsi command block because we may need to overwrite it
* with a request sense command. Basicly, we refrain from fiddling with
* the scsi_xfer struct (except do the expected updating of return values).
* We'll generally update: xs->{flags,resid,error,sense,status} and
* occasionally xs->retries.
*/
struct sbic_acb {
TAILQ_ENTRY(sbic_acb) chain;
struct scsi_xfer *xs; /* SCSI xfer ctrl block from above */
int flags; /* Status */
#define ACB_FREE 0x00
#define ACB_ACTIVE 0x01
#define ACB_DONE 0x04
#define ACB_CHKSENSE 0x08
#define ACB_BBUF 0x10 /* DMA input needs to be copied from bounce */
#define ACB_DATAIN 0x20 /* DMA direction flag */
struct scsi_generic cmd; /* SCSI command block */
int clen;
struct dma_chain sc_kv; /* Virtual address of whole DMA */
struct dma_chain sc_pa; /* Physical address of DMA segment */
u_long sc_tcnt; /* number of bytes for this DMA */
u_short sc_dmacmd; /* Internal data for this DMA */
char *pa_addr; /* XXXX initial phys addr */
};
/*
* Some info about each (possible) target on the SCSI bus. This should
* probably have been a "per target+lunit" structure, but we'll leave it at
* this for now. Is there a way to reliably hook it up to sc->fordriver??
*/
struct sbic_tinfo {
int cmds; /* #commands processed */
int dconns; /* #disconnects */
int senses; /* #request sense commands sent */
int lubusy; /* What local units/subr. are busy? */
} tinfo_t;
struct sbic_softc {
struct device sc_dev;
struct intrhand sc_dmaih;
struct intrhand sc_sbicih;
struct target_sync {
u_char state;
u_char period;
u_char offset;
} sc_sync[8];
u_char target; /* Currently active target */
u_char lun;
struct scsi_link sc_link; /* proto for sub devices */
sbic_regmap_p sc_sbicp; /* the SBIC */
int sc_ipl;
/* Lists of command blocks */
TAILQ_HEAD(acb_list, sbic_acb) free_list,
ready_list,
nexus_list;
struct sbic_acb *sc_nexus; /* current command */
struct sbic_acb sc_acb[8]; /* the real command blocks */
struct sbic_tinfo sc_tinfo[8];
struct scsi_xfer *sc_xs; /* transfer from high level code */
u_char sc_flags;
u_char sc_stat[2];
u_char sc_msg[7];
u_long sc_clkfreq;
u_long sc_tcnt; /* number of bytes transferred */
u_short sc_dmacmd; /* used by dma drivers */
u_long sc_dmamask; /* dma valid mem mask */
#ifdef DEBUG
u_short sc_dmatimo; /* dma timeout */
#endif
struct dma_chain *sc_cur;
struct dma_chain *sc_last;
int (*sc_dmago)(struct sbic_softc *, char *, int, int);
int (*sc_dmanext)(struct sbic_softc *);
void (*sc_enintr)(struct sbic_softc *);
void (*sc_dmastop)(struct sbic_softc *);
};
/*
* sc_flags
*/
#define SBICF_ALIVE 0x01 /* controller initialized */
#define SBICF_DCFLUSH 0x02 /* need flush for overlap after dma finishes */
#define SBICF_SELECTED 0x04 /* bus is in selected state. */
#define SBICF_ICMD 0x08 /* Immediate command in execution */
#define SBICF_BADDMA 0x10 /* controller can only DMA to ztwobus space */
#define SBICF_INTR 0x40 /* SBICF interrupt expected */
#define SBICF_INDMA 0x80 /* not used yet, DMA I/O in progress */
/*
* sync states
*/
#define SYNC_START 0 /* no sync handshake started */
#define SYNC_SENT 1 /* we sent sync request, no answer yet */
#define SYNC_DONE 2 /* target accepted our (or inferior) settings,
or it rejected the request and we stay async */
#define PHASE 0x07 /* mask for psns/pctl phase */
#define DATA_OUT_PHASE 0x00
#define DATA_IN_PHASE 0x01
#define CMD_PHASE 0x02
#define STATUS_PHASE 0x03
#define BUS_FREE_PHASE 0x04
#define ARB_SEL_PHASE 0x05 /* Fuji chip combines arbitration with sel. */
#define MESG_OUT_PHASE 0x06
#define MESG_IN_PHASE 0x07
#define MSG_CMD_COMPLETE 0x00
#define MSG_EXT_MESSAGE 0x01
#define MSG_SAVE_DATA_PTR 0x02
#define MSG_RESTORE_PTR 0x03
#define MSG_DISCONNECT 0x04
#define MSG_INIT_DETECT_ERROR 0x05
#define MSG_ABORT 0x06
#define MSG_REJECT 0x07
#define MSG_NOOP 0x08
#define MSG_PARITY_ERROR 0x09
#define MSG_BUS_DEVICE_RESET 0x0C
#define MSG_IDENTIFY 0x80
#define MSG_IDENTIFY_DR 0xc0 /* (disconnect/reconnect allowed) */
#define MSG_SYNC_REQ 0x01
#define MSG_ISIDENTIFY(x) ((x) & MSG_IDENTIFY)
#define STS_CHECKCOND 0x02 /* Check Condition (ie., read sense) */
#define STS_CONDMET 0x04 /* Condition Met (ie., search worked) */
#define STS_BUSY 0x08
#define STS_INTERMED 0x10 /* Intermediate status sent */
#define STS_EXT 0x80 /* Extended status valid */
/*
* States returned by our state machine
*/
#define SBIC_STATE_ERROR -1
#define SBIC_STATE_DONE 0
#define SBIC_STATE_RUNNING 1
#define SBIC_STATE_DISCONNECT 2
struct buf;
struct scsi_xfer;
int sbic_scsicmd(struct scsi_xfer *);
#endif /* _SBICVAR_H_ */
|
