87cfaf0e1f
types allow the reporting of error counts and other statistics. Currently we provide information on the last BDR or bus reset as well as active transaction inforamtion, but this will be expanded as more information is added to aid in error recovery. Use the 'last reset' information to better handle bus settle delays. Peripheral drivers now control whether a bus settle delay occurs and for how long. This allows target mode peripheral drivers to avoid having their device queue frozen by the XPT for what shoudl only be initiator type behavior. Don't perform a bus reset if the target device is incapable of performing transfer negotiation (e.g. Fiber Channel). If we don't perform a bus reset but the controller is capable of transfer negotiations, force negotiations on the first transaction to go to the device. This ensures that we aren't tripped up by a left over negotiation from the prom, BIOS, loader, etc. Add a default async handler funstion to cam_periph.c to remove duplicated code in all initiator type peripheral drivers. Allow mapping of XPT_CONT_TARGET_IO ccbs from userland. They are itentical to XPT_SCSI_IO ccbs as far as data mapping is concerned.
149 lines
5.4 KiB
C
149 lines
5.4 KiB
C
/*
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* Data structures and definitions for CAM peripheral ("type") drivers.
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*
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* Copyright (c) 1997, 1998 Justin T. Gibbs.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: cam_periph.h,v 1.3 1998/10/22 22:16:48 ken Exp $
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*/
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#ifndef _CAM_CAM_PERIPH_H
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#define _CAM_CAM_PERIPH_H 1
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#include <sys/queue.h>
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#ifdef KERNEL
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extern struct linker_set periphdriver_set;
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typedef void (periph_init_t)(void); /*
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* Callback informing the peripheral driver
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* it can perform it's initialization since
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* the XPT is now fully initialized.
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*/
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typedef periph_init_t *periph_init_func_t;
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struct periph_driver {
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periph_init_func_t init;
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char *driver_name;
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TAILQ_HEAD(,cam_periph) units;
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u_int generation;
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};
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typedef enum {
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CAM_PERIPH_BIO,
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CAM_PERIPH_NET
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} cam_periph_type;
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/* Generically usefull offsets into the peripheral private area */
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#define ppriv_ptr0 periph_priv.entries[0].ptr
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#define ppriv_ptr1 periph_priv.entries[1].ptr
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#define ppriv_field0 periph_priv.entries[0].field
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#define ppriv_field1 periph_priv.entries[1].field
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typedef void periph_start_t (struct cam_periph *periph,
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union ccb *start_ccb);
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typedef cam_status periph_ctor_t (struct cam_periph *periph,
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void *arg);
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typedef void periph_oninv_t (struct cam_periph *periph);
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typedef void periph_dtor_t (struct cam_periph *periph);
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struct cam_periph {
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cam_pinfo pinfo;
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periph_start_t *periph_start;
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periph_oninv_t *periph_oninval;
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periph_dtor_t *periph_dtor;
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char *periph_name;
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struct cam_path *path; /* Compiled path to device */
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void *softc;
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u_int32_t unit_number;
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cam_periph_type type;
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u_int32_t flags;
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#define CAM_PERIPH_RUNNING 0x01
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#define CAM_PERIPH_LOCKED 0x02
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#define CAM_PERIPH_LOCK_WANTED 0x04
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#define CAM_PERIPH_INVALID 0x08
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#define CAM_PERIPH_NEW_DEV_FOUND 0x10
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#define CAM_PERIPH_RECOVERY_INPROG 0x20
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u_int32_t immediate_priority;
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u_int32_t refcount;
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SLIST_HEAD(, ccb_hdr) ccb_list; /* For "immediate" requests */
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SLIST_ENTRY(cam_periph) periph_links;
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TAILQ_ENTRY(cam_periph) unit_links;
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ac_callback_t *deferred_callback;
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ac_code deferred_ac;
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};
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#define CAM_PERIPH_MAXMAPS 2
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struct cam_periph_map_info {
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int num_bufs_used;
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struct buf *bp[CAM_PERIPH_MAXMAPS];
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};
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cam_status cam_periph_alloc(periph_ctor_t *periph_ctor,
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periph_oninv_t *periph_oninvalidate,
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periph_dtor_t *periph_dtor,
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periph_start_t *periph_start,
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char *name, cam_periph_type type, struct cam_path *, ac_callback_t *, ac_code, void *arg);
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struct cam_periph *cam_periph_find(struct cam_path *path, char *name);
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int cam_periph_lock(struct cam_periph *periph, int priority);
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void cam_periph_unlock(struct cam_periph *periph);
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cam_status cam_periph_acquire(struct cam_periph *periph);
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void cam_periph_release(struct cam_periph *periph);
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void cam_periph_invalidate(struct cam_periph *periph);
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int cam_periph_mapmem(union ccb *ccb,
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struct cam_periph_map_info *mapinfo);
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void cam_periph_unmapmem(union ccb *ccb,
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struct cam_periph_map_info *mapinfo);
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union ccb *cam_periph_getccb(struct cam_periph *periph,
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u_int32_t priority);
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void cam_periph_ccbwait(union ccb *ccb);
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int cam_periph_runccb(union ccb *ccb,
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int (*error_routine)(union ccb *ccb,
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cam_flags camflags,
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u_int32_t sense_flags),
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cam_flags camflags, u_int32_t sense_flags,
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struct devstat *ds);
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int cam_periph_ioctl(struct cam_periph *periph, int cmd,
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caddr_t addr,
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int (*error_routine)(union ccb *ccb,
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cam_flags camflags,
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u_int32_t sense_flags));
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void cam_freeze_devq(struct cam_path *path);
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u_int32_t cam_release_devq(struct cam_path *path, u_int32_t relsim_flags,
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u_int32_t opening_reduction, u_int32_t timeout,
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int getcount_only);
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void cam_periph_async(struct cam_periph *periph, u_int32_t code,
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struct cam_path *path, void *arg);
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void cam_periph_bus_settle(struct cam_periph *periph,
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u_int bus_settle_ms);
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void cam_periph_freeze_after_event(struct cam_periph *periph,
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struct timeval* event_time,
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u_int duration_ms);
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int cam_periph_error(union ccb *ccb, cam_flags camflags,
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u_int32_t sense_flags, union ccb *save_ccb);
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#endif /* KERNEL */
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#endif /* _CAM_CAM_PERIPH_H */
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