83c5d981ac
- Unify bus reset/probe sequence. Whenever bus attached at boot or later, CAM will automatically reset and scan it. It allows to remove duplicate code from many drivers. - Any bus, attached before CAM completed it's boot-time initialization, will equally join to the process, delaying boot if needed. - New kern.cam.boot_delay loader tunable should help controllers that are still unable to register their buses in time (such as slow USB/ PCCard/ CardBus devices), by adding one more event to wait on boot. - To allow synchronization between different CAM levels, concept of requests priorities was extended. Priorities now split between several "run levels". Device can be freezed at specified level, allowing higher priority requests to pass. For example, no payload requests allowed, until PMP driver enable port. ATA XPT negotiate transfer parameters, periph driver configure caching and so on. - Frozen requests are no more counted by request allocation scheduler. It fixes deadlocks, when frozen low priority payload requests occupying slots, required by higher levels to manage theit execution. - Two last changes were holding proper ATA reinitialization and error recovery implementation. Now it is done: SATA controllers and Port Multipliers now implement automatic hot-plug and should correctly recover from timeouts and bus resets. - Improve SCSI error recovery for devices on buses without automatic sense reporting, such as ATAPI or USB. For example, it allows CAM to wait, while CD drive loads disk, instead of immediately return error status. - Decapitalize diagnostic messages and make them more readable and sensible. - Teach PMP driver to limit maximum speed on fan-out ports. - Make boot wait for PMP scan completes, and make rescan more reliable. - Fix pass driver, to return CCB to user level in case of error. - Increase number of retries in cd driver, as device may return several UAs.
205 lines
6.7 KiB
C
205 lines
6.7 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
|
|
|
|
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 usefull 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 {
|
|
cam_pinfo pinfo;
|
|
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_SENSE_INPROG 0x40
|
|
u_int32_t immediate_priority;
|
|
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;
|
|
};
|
|
|
|
#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);
|
|
cam_status cam_periph_acquire(struct cam_periph *periph);
|
|
void cam_periph_release(struct cam_periph *periph);
|
|
void cam_periph_release_locked(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);
|
|
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);
|
|
void cam_freeze_devq_arg(struct cam_path *path, u_int32_t flags,
|
|
uint32_t arg);
|
|
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 void
|
|
cam_periph_lock(struct cam_periph *periph)
|
|
{
|
|
mtx_lock(periph->sim->mtx);
|
|
}
|
|
|
|
static __inline void
|
|
cam_periph_unlock(struct cam_periph *periph)
|
|
{
|
|
mtx_unlock(periph->sim->mtx);
|
|
}
|
|
|
|
static __inline int
|
|
cam_periph_owned(struct cam_periph *periph)
|
|
{
|
|
return (mtx_owned(periph->sim->mtx));
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* _CAM_CAM_PERIPH_H */
|