2 * Data structures and definitions for CAM peripheral ("type") drivers.
4 * Copyright (c) 1997, 1998 Justin T. Gibbs.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification, immediately at the beginning of the file.
13 * 2. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * $FreeBSD: src/sys/cam/cam_periph.h,v 1.6.2.1 2000/05/07 18:16:49 n_hibma Exp $
29 * $DragonFly: src/sys/bus/cam/cam_periph.h,v 1.8 2007/11/28 21:29:18 pavalos Exp $
32 #ifndef _CAM_CAM_PERIPH_H
33 #define _CAM_CAM_PERIPH_H 1
35 #include <sys/queue.h>
39 extern struct cam_periph
*xpt_periph
;
41 extern struct periph_driver
**periph_drivers
;
42 void periphdriver_register(void *);
44 #include <sys/module.h>
45 #define PERIPHDRIVER_DECLARE(name, driver) \
46 static int name ## _modevent(module_t mod, int type, void *data) \
50 periphdriver_register(data); \
53 kprintf(#name " module unload - not possible for this module type\n"); \
60 static moduledata_t name ## _mod = { \
65 DECLARE_MODULE(name, name ## _mod, SI_SUB_DRIVERS, SI_ORDER_ANY); \
66 MODULE_DEPEND(name, cam, 1, 1, 1)
68 typedef void (periph_init_t
)(void); /*
69 * Callback informing the peripheral driver
70 * it can perform it's initialization since
71 * the XPT is now fully initialized.
73 typedef periph_init_t
*periph_init_func_t
;
75 struct periph_driver
{
76 periph_init_func_t init
;
78 TAILQ_HEAD(,cam_periph
) units
;
87 /* Generically usefull offsets into the peripheral private area */
88 #define ppriv_ptr0 periph_priv.entries[0].ptr
89 #define ppriv_ptr1 periph_priv.entries[1].ptr
90 #define ppriv_field0 periph_priv.entries[0].field
91 #define ppriv_field1 periph_priv.entries[1].field
93 typedef void periph_start_t (struct cam_periph
*periph
,
94 union ccb
*start_ccb
);
95 typedef cam_status
periph_ctor_t (struct cam_periph
*periph
,
97 typedef void periph_oninv_t (struct cam_periph
*periph
);
98 typedef void periph_dtor_t (struct cam_periph
*periph
);
101 periph_start_t
*periph_start
;
102 periph_oninv_t
*periph_oninval
;
103 periph_dtor_t
*periph_dtor
;
105 struct cam_path
*path
; /* Compiled path to device */
107 u_int32_t unit_number
;
108 cam_periph_type type
;
110 #define CAM_PERIPH_RUNNING 0x01
111 #define CAM_PERIPH_LOCKED 0x02
112 #define CAM_PERIPH_LOCK_WANTED 0x04
113 #define CAM_PERIPH_INVALID 0x08
114 #define CAM_PERIPH_NEW_DEV_FOUND 0x10
115 #define CAM_PERIPH_RECOVERY_INPROG 0x20
116 u_int32_t immediate_priority
;
118 SLIST_HEAD(, ccb_hdr
) ccb_list
; /* For "immediate" requests */
119 SLIST_ENTRY(cam_periph
) periph_links
;
120 TAILQ_ENTRY(cam_periph
) unit_links
;
121 ac_callback_t
*deferred_callback
;
125 #define CAM_PERIPH_MAXMAPS 2
129 struct cam_periph_map_info
{
131 struct buf
*bp
[CAM_PERIPH_MAXMAPS
];
132 caddr_t saved_ptrs
[CAM_PERIPH_MAXMAPS
];
135 cam_status
cam_periph_alloc(periph_ctor_t
*periph_ctor
,
136 periph_oninv_t
*periph_oninvalidate
,
137 periph_dtor_t
*periph_dtor
,
138 periph_start_t
*periph_start
,
139 char *name
, cam_periph_type type
, struct cam_path
*,
140 ac_callback_t
*, ac_code
, void *arg
);
141 struct cam_periph
*cam_periph_find(struct cam_path
*path
, char *name
);
142 int cam_periph_lock(struct cam_periph
*periph
, int flags
);
143 void cam_periph_unlock(struct cam_periph
*periph
);
144 cam_status
cam_periph_acquire(struct cam_periph
*periph
);
145 void cam_periph_release(struct cam_periph
*periph
);
146 void cam_periph_invalidate(struct cam_periph
*periph
);
147 int cam_periph_mapmem(union ccb
*ccb
,
148 struct cam_periph_map_info
*mapinfo
);
149 void cam_periph_unmapmem(union ccb
*ccb
,
150 struct cam_periph_map_info
*mapinfo
);
151 union ccb
*cam_periph_getccb(struct cam_periph
*periph
,
153 void cam_periph_ccbwait(union ccb
*ccb
);
154 int cam_periph_runccb(union ccb
*ccb
,
155 int (*error_routine
)(union ccb
*ccb
,
157 u_int32_t sense_flags
),
158 cam_flags camflags
, u_int32_t sense_flags
,
160 int cam_periph_ioctl(struct cam_periph
*periph
, int cmd
,
162 int (*error_routine
)(union ccb
*ccb
,
164 u_int32_t sense_flags
));
165 void cam_freeze_devq(struct cam_path
*path
);
166 u_int32_t
cam_release_devq(struct cam_path
*path
, u_int32_t relsim_flags
,
167 u_int32_t opening_reduction
, u_int32_t timeout
,
169 void cam_periph_async(struct cam_periph
*periph
, u_int32_t code
,
170 struct cam_path
*path
, void *arg
);
171 void cam_periph_bus_settle(struct cam_periph
*periph
,
172 u_int bus_settle_ms
);
173 void cam_periph_freeze_after_event(struct cam_periph
*periph
,
174 struct timeval
* event_time
,
176 int cam_periph_error(union ccb
*ccb
, cam_flags camflags
,
177 u_int32_t sense_flags
, union ccb
*save_ccb
);
180 #endif /* _CAM_CAM_PERIPH_H */