2 * Data structures and definitions for CAM peripheral ("type") drivers.
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
6 * Copyright (c) 1997, 1998 Justin T. Gibbs.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions, and the following disclaimer,
14 * without modification, immediately at the beginning of the file.
15 * 2. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #ifndef _CAM_CAM_PERIPH_H
34 #define _CAM_CAM_PERIPH_H 1
36 #include <sys/queue.h>
37 #include <cam/cam_sim.h>
41 #include <sys/mutex.h>
42 #include <sys/sysctl.h>
43 #include <sys/taskqueue.h>
45 #include <cam/cam_xpt.h>
49 extern struct cam_periph *xpt_periph;
51 extern struct periph_driver **periph_drivers;
52 void periphdriver_register(void *);
53 int periphdriver_unregister(void *);
54 void periphdriver_init(int level);
56 #include <sys/module.h>
57 #define PERIPHDRIVER_DECLARE(name, driver) \
58 static int name ## _modevent(module_t mod, int type, void *data) \
62 periphdriver_register(data); \
65 return (periphdriver_unregister(data)); \
71 static moduledata_t name ## _mod = { \
76 DECLARE_MODULE(name, name ## _mod, SI_SUB_DRIVERS, SI_ORDER_ANY); \
77 MODULE_DEPEND(name, cam, 1, 1, 1)
80 * Callback informing the peripheral driver it can perform it's
81 * initialization since the XPT is now fully initialized.
83 typedef void (periph_init_t)(void);
86 * Callback requesting the peripheral driver to remove its instances
87 * and shutdown, if possible.
89 typedef int (periph_deinit_t)(void);
91 struct periph_driver {
94 TAILQ_HEAD(,cam_periph) units;
97 #define CAM_PERIPH_DRV_EARLY 0x01
98 periph_deinit_t *deinit;
105 /* Generically useful offsets into the peripheral private area */
106 #define ppriv_ptr0 periph_priv.entries[0].ptr
107 #define ppriv_ptr1 periph_priv.entries[1].ptr
108 #define ppriv_field0 periph_priv.entries[0].field
109 #define ppriv_field1 periph_priv.entries[1].field
111 typedef void periph_start_t (struct cam_periph *periph,
112 union ccb *start_ccb);
113 typedef cam_status periph_ctor_t (struct cam_periph *periph,
115 typedef void periph_oninv_t (struct cam_periph *periph);
116 typedef void periph_dtor_t (struct cam_periph *periph);
118 periph_start_t *periph_start;
119 periph_oninv_t *periph_oninval;
120 periph_dtor_t *periph_dtor;
122 struct cam_path *path; /* Compiled path to device */
125 u_int32_t unit_number;
126 cam_periph_type type;
128 #define CAM_PERIPH_RUNNING 0x01
129 #define CAM_PERIPH_LOCKED 0x02
130 #define CAM_PERIPH_LOCK_WANTED 0x04
131 #define CAM_PERIPH_INVALID 0x08
132 #define CAM_PERIPH_NEW_DEV_FOUND 0x10
133 #define CAM_PERIPH_RECOVERY_INPROG 0x20
134 #define CAM_PERIPH_RUN_TASK 0x40
135 #define CAM_PERIPH_FREE 0x80
136 #define CAM_PERIPH_ANNOUNCED 0x100
137 uint32_t scheduled_priority;
138 uint32_t immediate_priority;
139 int periph_allocating;
140 int periph_allocated;
142 SLIST_HEAD(, ccb_hdr) ccb_list; /* For "immediate" requests */
143 SLIST_ENTRY(cam_periph) periph_links;
144 TAILQ_ENTRY(cam_periph) unit_links;
145 ac_callback_t *deferred_callback;
147 struct task periph_run_task;
150 #define CAM_PERIPH_MAXMAPS 2
152 struct cam_periph_map_info {
154 void *orig[CAM_PERIPH_MAXMAPS];
155 struct buf *bp[CAM_PERIPH_MAXMAPS];
158 cam_status cam_periph_alloc(periph_ctor_t *periph_ctor,
159 periph_oninv_t *periph_oninvalidate,
160 periph_dtor_t *periph_dtor,
161 periph_start_t *periph_start,
162 char *name, cam_periph_type type, struct cam_path *,
163 ac_callback_t *, ac_code, void *arg);
164 struct cam_periph *cam_periph_find(struct cam_path *path, char *name);
165 int cam_periph_list(struct cam_path *, struct sbuf *);
166 int cam_periph_acquire(struct cam_periph *periph);
167 void cam_periph_doacquire(struct cam_periph *periph);
168 void cam_periph_release(struct cam_periph *periph);
169 void cam_periph_release_locked(struct cam_periph *periph);
170 void cam_periph_release_locked_buses(struct cam_periph *periph);
171 int cam_periph_hold(struct cam_periph *periph, int priority);
172 void cam_periph_unhold(struct cam_periph *periph);
173 void cam_periph_invalidate(struct cam_periph *periph);
174 int cam_periph_mapmem(union ccb *ccb,
175 struct cam_periph_map_info *mapinfo,
177 void cam_periph_unmapmem(union ccb *ccb,
178 struct cam_periph_map_info *mapinfo);
179 union ccb *cam_periph_getccb(struct cam_periph *periph,
181 int cam_periph_runccb(union ccb *ccb,
182 int (*error_routine)(union ccb *ccb,
184 u_int32_t sense_flags),
185 cam_flags camflags, u_int32_t sense_flags,
187 int cam_periph_ioctl(struct cam_periph *periph, u_long cmd,
189 int (*error_routine)(union ccb *ccb,
191 u_int32_t sense_flags));
192 void cam_freeze_devq(struct cam_path *path);
193 u_int32_t cam_release_devq(struct cam_path *path, u_int32_t relsim_flags,
194 u_int32_t opening_reduction, u_int32_t arg,
196 void cam_periph_async(struct cam_periph *periph, u_int32_t code,
197 struct cam_path *path, void *arg);
198 void cam_periph_bus_settle(struct cam_periph *periph,
199 u_int bus_settle_ms);
200 void cam_periph_freeze_after_event(struct cam_periph *periph,
201 struct timeval* event_time,
203 int cam_periph_error(union ccb *ccb, cam_flags camflags,
204 u_int32_t sense_flags);
205 int cam_periph_invalidate_sysctl(SYSCTL_HANDLER_ARGS);
207 static __inline struct mtx *
208 cam_periph_mtx(struct cam_periph *periph)
211 return (xpt_path_mtx(periph->path));
216 #define cam_periph_owned(periph) \
217 mtx_owned(xpt_path_mtx((periph)->path))
219 #define cam_periph_lock(periph) \
220 mtx_lock(xpt_path_mtx((periph)->path))
222 #define cam_periph_unlock(periph) \
223 mtx_unlock(xpt_path_mtx((periph)->path))
225 #define cam_periph_assert(periph, what) \
226 mtx_assert(xpt_path_mtx((periph)->path), (what))
228 #define cam_periph_sleep(periph, chan, priority, wmesg, timo) \
229 xpt_path_sleep((periph)->path, (chan), (priority), (wmesg), (timo))
231 static inline struct cam_periph *
232 cam_periph_acquire_first(struct periph_driver *driver)
234 struct cam_periph *periph;
237 periph = TAILQ_FIRST(&driver->units);
238 while (periph != NULL && (periph->flags & CAM_PERIPH_INVALID) != 0)
239 periph = TAILQ_NEXT(periph, unit_links);
246 static inline struct cam_periph *
247 cam_periph_acquire_next(struct cam_periph *pperiph)
249 struct cam_periph *periph = pperiph;
251 cam_periph_assert(pperiph, MA_NOTOWNED);
254 periph = TAILQ_NEXT(periph, unit_links);
255 } while (periph != NULL && (periph->flags & CAM_PERIPH_INVALID) != 0);
259 cam_periph_release(pperiph);
263 #define CAM_PERIPH_FOREACH(periph, driver) \
264 for ((periph) = cam_periph_acquire_first(driver); \
266 (periph) = cam_periph_acquire_next(periph))
268 #define CAM_PERIPH_PRINT(p, msg, args...) \
269 printf("%s%d:" msg, (periph)->periph_name, (periph)->unit_number, ##args)
272 #endif /* _CAM_CAM_PERIPH_H */