255 lines
8.2 KiB
C
255 lines
8.2 KiB
C
/*-
|
|
* Data structures and definitions for CAM peripheral ("type") drivers.
|
|
*
|
|
* Copyright (c) 1997, 1998 Justin T. Gibbs.
|
|
* All rights reserved.
|
|
*
|
|
* 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,
|
|
* without modification, immediately at the beginning of the file.
|
|
* 2. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _CAM_CAM_PERIPH_H
|
|
#define _CAM_CAM_PERIPH_H 1
|
|
|
|
#include <sys/queue.h>
|
|
#include <cam/cam_sim.h>
|
|
|
|
#ifdef _KERNEL
|
|
#include <sys/taskqueue.h>
|
|
|
|
#include <cam/cam_xpt.h>
|
|
|
|
struct devstat;
|
|
|
|
extern struct cam_periph *xpt_periph;
|
|
|
|
extern struct periph_driver **periph_drivers;
|
|
void periphdriver_register(void *);
|
|
void periphdriver_init(int level);
|
|
|
|
#include <sys/module.h>
|
|
#define PERIPHDRIVER_DECLARE(name, driver) \
|
|
static int name ## _modevent(module_t mod, int type, void *data) \
|
|
{ \
|
|
switch (type) { \
|
|
case MOD_LOAD: \
|
|
periphdriver_register(data); \
|
|
break; \
|
|
case MOD_UNLOAD: \
|
|
printf(#name " module unload - not possible for this module type\n"); \
|
|
return EINVAL; \
|
|
default: \
|
|
return EOPNOTSUPP; \
|
|
} \
|
|
return 0; \
|
|
} \
|
|
static moduledata_t name ## _mod = { \
|
|
#name, \
|
|
name ## _modevent, \
|
|
(void *)&driver \
|
|
}; \
|
|
DECLARE_MODULE(name, name ## _mod, SI_SUB_DRIVERS, SI_ORDER_ANY); \
|
|
MODULE_DEPEND(name, cam, 1, 1, 1)
|
|
|
|
typedef void (periph_init_t)(void); /*
|
|
* Callback informing the peripheral driver
|
|
* it can perform it's initialization since
|
|
* the XPT is now fully initialized.
|
|
*/
|
|
typedef periph_init_t *periph_init_func_t;
|
|
|
|
struct periph_driver {
|
|
periph_init_func_t init;
|
|
char *driver_name;
|
|
TAILQ_HEAD(,cam_periph) units;
|
|
u_int generation;
|
|
u_int flags;
|
|
#define CAM_PERIPH_DRV_EARLY 0x01
|
|
};
|
|
|
|
typedef enum {
|
|
CAM_PERIPH_BIO
|
|
} cam_periph_type;
|
|
|
|
/* Generically useful offsets into the peripheral private area */
|
|
#define ppriv_ptr0 periph_priv.entries[0].ptr
|
|
#define ppriv_ptr1 periph_priv.entries[1].ptr
|
|
#define ppriv_field0 periph_priv.entries[0].field
|
|
#define ppriv_field1 periph_priv.entries[1].field
|
|
|
|
typedef void periph_start_t (struct cam_periph *periph,
|
|
union ccb *start_ccb);
|
|
typedef cam_status periph_ctor_t (struct cam_periph *periph,
|
|
void *arg);
|
|
typedef void periph_oninv_t (struct cam_periph *periph);
|
|
typedef void periph_dtor_t (struct cam_periph *periph);
|
|
struct cam_periph {
|
|
periph_start_t *periph_start;
|
|
periph_oninv_t *periph_oninval;
|
|
periph_dtor_t *periph_dtor;
|
|
char *periph_name;
|
|
struct cam_path *path; /* Compiled path to device */
|
|
void *softc;
|
|
struct cam_sim *sim;
|
|
u_int32_t unit_number;
|
|
cam_periph_type type;
|
|
u_int32_t flags;
|
|
#define CAM_PERIPH_RUNNING 0x01
|
|
#define CAM_PERIPH_LOCKED 0x02
|
|
#define CAM_PERIPH_LOCK_WANTED 0x04
|
|
#define CAM_PERIPH_INVALID 0x08
|
|
#define CAM_PERIPH_NEW_DEV_FOUND 0x10
|
|
#define CAM_PERIPH_RECOVERY_INPROG 0x20
|
|
#define CAM_PERIPH_RUN_TASK 0x40
|
|
#define CAM_PERIPH_FREE 0x80
|
|
#define CAM_PERIPH_ANNOUNCED 0x100
|
|
uint32_t scheduled_priority;
|
|
uint32_t immediate_priority;
|
|
int periph_allocating;
|
|
int periph_allocated;
|
|
u_int32_t refcount;
|
|
SLIST_HEAD(, ccb_hdr) ccb_list; /* For "immediate" requests */
|
|
SLIST_ENTRY(cam_periph) periph_links;
|
|
TAILQ_ENTRY(cam_periph) unit_links;
|
|
ac_callback_t *deferred_callback;
|
|
ac_code deferred_ac;
|
|
struct task periph_run_task;
|
|
};
|
|
|
|
#define CAM_PERIPH_MAXMAPS 2
|
|
|
|
struct cam_periph_map_info {
|
|
int num_bufs_used;
|
|
struct buf *bp[CAM_PERIPH_MAXMAPS];
|
|
};
|
|
|
|
cam_status cam_periph_alloc(periph_ctor_t *periph_ctor,
|
|
periph_oninv_t *periph_oninvalidate,
|
|
periph_dtor_t *periph_dtor,
|
|
periph_start_t *periph_start,
|
|
char *name, cam_periph_type type, struct cam_path *,
|
|
ac_callback_t *, ac_code, void *arg);
|
|
struct cam_periph *cam_periph_find(struct cam_path *path, char *name);
|
|
int cam_periph_list(struct cam_path *, struct sbuf *);
|
|
cam_status cam_periph_acquire(struct cam_periph *periph);
|
|
void cam_periph_doacquire(struct cam_periph *periph);
|
|
void cam_periph_release(struct cam_periph *periph);
|
|
void cam_periph_release_locked(struct cam_periph *periph);
|
|
void cam_periph_release_locked_buses(struct cam_periph *periph);
|
|
int cam_periph_hold(struct cam_periph *periph, int priority);
|
|
void cam_periph_unhold(struct cam_periph *periph);
|
|
void cam_periph_invalidate(struct cam_periph *periph);
|
|
int cam_periph_mapmem(union ccb *ccb,
|
|
struct cam_periph_map_info *mapinfo,
|
|
u_int maxmap);
|
|
void cam_periph_unmapmem(union ccb *ccb,
|
|
struct cam_periph_map_info *mapinfo);
|
|
union ccb *cam_periph_getccb(struct cam_periph *periph,
|
|
u_int32_t priority);
|
|
void cam_periph_ccbwait(union ccb *ccb);
|
|
int cam_periph_runccb(union ccb *ccb,
|
|
int (*error_routine)(union ccb *ccb,
|
|
cam_flags camflags,
|
|
u_int32_t sense_flags),
|
|
cam_flags camflags, u_int32_t sense_flags,
|
|
struct devstat *ds);
|
|
int cam_periph_ioctl(struct cam_periph *periph, u_long cmd,
|
|
caddr_t addr,
|
|
int (*error_routine)(union ccb *ccb,
|
|
cam_flags camflags,
|
|
u_int32_t sense_flags));
|
|
void cam_freeze_devq(struct cam_path *path);
|
|
u_int32_t cam_release_devq(struct cam_path *path, u_int32_t relsim_flags,
|
|
u_int32_t opening_reduction, u_int32_t arg,
|
|
int getcount_only);
|
|
void cam_periph_async(struct cam_periph *periph, u_int32_t code,
|
|
struct cam_path *path, void *arg);
|
|
void cam_periph_bus_settle(struct cam_periph *periph,
|
|
u_int bus_settle_ms);
|
|
void cam_periph_freeze_after_event(struct cam_periph *periph,
|
|
struct timeval* event_time,
|
|
u_int duration_ms);
|
|
int cam_periph_error(union ccb *ccb, cam_flags camflags,
|
|
u_int32_t sense_flags, union ccb *save_ccb);
|
|
|
|
static __inline struct mtx *
|
|
cam_periph_mtx(struct cam_periph *periph)
|
|
{
|
|
return (xpt_path_mtx(periph->path));
|
|
}
|
|
|
|
#define cam_periph_owned(periph) \
|
|
mtx_owned(xpt_path_mtx((periph)->path))
|
|
|
|
#define cam_periph_lock(periph) \
|
|
mtx_lock(xpt_path_mtx((periph)->path))
|
|
|
|
#define cam_periph_unlock(periph) \
|
|
mtx_unlock(xpt_path_mtx((periph)->path))
|
|
|
|
#define cam_periph_assert(periph, what) \
|
|
mtx_assert(xpt_path_mtx((periph)->path), (what))
|
|
|
|
#define cam_periph_sleep(periph, chan, priority, wmesg, timo) \
|
|
xpt_path_sleep((periph)->path, (chan), (priority), (wmesg), (timo))
|
|
|
|
static inline struct cam_periph *
|
|
cam_periph_acquire_first(struct periph_driver *driver)
|
|
{
|
|
struct cam_periph *periph;
|
|
|
|
xpt_lock_buses();
|
|
periph = TAILQ_FIRST(&driver->units);
|
|
while (periph != NULL && (periph->flags & CAM_PERIPH_INVALID) != 0)
|
|
periph = TAILQ_NEXT(periph, unit_links);
|
|
if (periph != NULL)
|
|
periph->refcount++;
|
|
xpt_unlock_buses();
|
|
return (periph);
|
|
}
|
|
|
|
static inline struct cam_periph *
|
|
cam_periph_acquire_next(struct cam_periph *pperiph)
|
|
{
|
|
struct cam_periph *periph = pperiph;
|
|
|
|
cam_periph_assert(pperiph, MA_NOTOWNED);
|
|
xpt_lock_buses();
|
|
do {
|
|
periph = TAILQ_NEXT(periph, unit_links);
|
|
} while (periph != NULL && (periph->flags & CAM_PERIPH_INVALID) != 0);
|
|
if (periph != NULL)
|
|
periph->refcount++;
|
|
xpt_unlock_buses();
|
|
cam_periph_release(pperiph);
|
|
return (periph);
|
|
}
|
|
|
|
#define CAM_PERIPH_FOREACH(periph, driver) \
|
|
for ((periph) = cam_periph_acquire_first(driver); \
|
|
(periph) != NULL; \
|
|
(periph) = cam_periph_acquire_next(periph))
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _CAM_CAM_PERIPH_H */
|