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/*-
* Data structures and definitions for dealing with the
* Common Access Method Transport (xpt) layer.
*
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1997 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_XPT_H
#define _CAM_CAM_XPT_H 1
#ifdef _KERNEL
#include <sys/cdefs.h>
#include <cam/cam_ccb.h>
#endif
/* Forward Declarations */
union ccb;
struct cam_periph;
struct cam_ed;
struct cam_sim;
struct sbuf;
/*
* Definition of a CAM path. Paths are created from bus, target, and lun ids
* via xpt_create_path and allow for reference to devices without recurring
* lookups in the edt.
*/
struct cam_path;
/* Path functions */
#ifdef _KERNEL
/*
* Definition of an async handler callback block. These are used to add
* SIMs and peripherals to the async callback lists.
*/
struct async_node {
SLIST_ENTRY(async_node) links;
u_int32_t event_enable; /* Async Event enables */
u_int32_t event_lock; /* Take SIM lock for handlers. */
void (*callback)(void *arg, u_int32_t code,
struct cam_path *path, void *args);
void *callback_arg;
};
SLIST_HEAD(async_list, async_node);
SLIST_HEAD(periph_list, cam_periph);
void xpt_action(union ccb *new_ccb);
void xpt_action_default(union ccb *new_ccb);
union ccb *xpt_alloc_ccb(void);
union ccb *xpt_alloc_ccb_nowait(void);
void xpt_free_ccb(union ccb *free_ccb);
void xpt_setup_ccb_flags(struct ccb_hdr *ccb_h,
struct cam_path *path,
u_int32_t priority,
u_int32_t flags);
void xpt_setup_ccb(struct ccb_hdr *ccb_h,
struct cam_path *path,
u_int32_t priority);
void xpt_merge_ccb(union ccb *dst_ccb,
union ccb *src_ccb);
cam_status xpt_create_path(struct cam_path **new_path_ptr,
struct cam_periph *perph,
path_id_t path_id,
target_id_t target_id, lun_id_t lun_id);
cam_status xpt_create_path_unlocked(struct cam_path **new_path_ptr,
struct cam_periph *perph,
path_id_t path_id,
target_id_t target_id, lun_id_t lun_id);
int xpt_getattr(char *buf, size_t len, const char *attr,
struct cam_path *path);
void xpt_free_path(struct cam_path *path);
void xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
uint32_t *periph_ref, uint32_t *target_ref,
uint32_t *device_ref);
int xpt_path_comp(struct cam_path *path1,
struct cam_path *path2);
int xpt_path_comp_dev(struct cam_path *path,
struct cam_ed *dev);
int xpt_path_string(struct cam_path *path, char *str,
size_t str_len);
int xpt_path_sbuf(struct cam_path *path, struct sbuf *sb);
path_id_t xpt_path_path_id(struct cam_path *path);
target_id_t xpt_path_target_id(struct cam_path *path);
lun_id_t xpt_path_lun_id(struct cam_path *path);
struct cam_sim *xpt_path_sim(struct cam_path *path);
struct cam_periph *xpt_path_periph(struct cam_path *path);
device_t xpt_path_sim_device(const struct cam_path *path);
void xpt_print_path(struct cam_path *path);
void xpt_print_device(struct cam_ed *device);
void xpt_print(struct cam_path *path, const char *fmt, ...);
void xpt_async(u_int32_t async_code, struct cam_path *path,
void *async_arg);
void xpt_rescan(union ccb *ccb);
void xpt_hold_boot(void);
void xpt_release_boot(void);
void xpt_lock_buses(void);
void xpt_unlock_buses(void);
struct mtx * xpt_path_mtx(struct cam_path *path);
#define xpt_path_lock(path) mtx_lock(xpt_path_mtx(path))
#define xpt_path_unlock(path) mtx_unlock(xpt_path_mtx(path))
#define xpt_path_assert(path, what) mtx_assert(xpt_path_mtx(path), (what))
#define xpt_path_owned(path) mtx_owned(xpt_path_mtx(path))
#define xpt_path_sleep(path, chan, priority, wmesg, timo) \
msleep((chan), xpt_path_mtx(path), (priority), (wmesg), (timo))
cam_status xpt_register_async(int event, ac_callback_t *cbfunc,
void *cbarg, struct cam_path *path);
cam_status xpt_compile_path(struct cam_path *new_path,
struct cam_periph *perph,
path_id_t path_id,
target_id_t target_id,
lun_id_t lun_id);
int xpt_clone_path(struct cam_path **new_path,
struct cam_path *path);
void xpt_release_path(struct cam_path *path);
const char * xpt_action_name(uint32_t action);
void xpt_pollwait(union ccb *start_ccb, uint32_t timeout);
uint32_t xpt_poll_setup(union ccb *start_ccb);
void xpt_sim_poll(struct cam_sim *sim);
/*
* Perform a path inquiry at the request priority. The bzero may be
* unnecessary.
*/
static inline void
xpt_path_inq(struct ccb_pathinq *cpi, struct cam_path *path)
{
bzero(cpi, sizeof(*cpi));
xpt_setup_ccb(&cpi->ccb_h, path, CAM_PRIORITY_NORMAL);
cpi->ccb_h.func_code = XPT_PATH_INQ;
xpt_action((union ccb *)cpi);
}
#endif /* _KERNEL */
#endif /* _CAM_CAM_XPT_H */
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