FreeBSD/Linux Kernel Cross Reference
sys/cam/cam_xpt.h
1 /*-
2 * Data structures and definitions for dealing with the
3 * Common Access Method Transport (xpt) layer.
4 *
5 * Copyright (c) 1997 Justin T. Gibbs.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions, and the following disclaimer,
13 * without modification, immediately at the beginning of the file.
14 * 2. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/sys/cam/cam_xpt.h,v 1.9 2007/05/16 16:54:23 scottl Exp $
30 */
31
32 #ifndef _CAM_CAM_XPT_H
33 #define _CAM_CAM_XPT_H 1
34
35 /* Forward Declarations */
36 union ccb;
37 struct cam_periph;
38 struct cam_sim;
39
40 /*
41 * Definition of a CAM path. Paths are created from bus, target, and lun ids
42 * via xpt_create_path and allow for reference to devices without recurring
43 * lookups in the edt.
44 */
45 struct cam_path;
46
47 /* Path functions */
48
49 #ifdef _KERNEL
50
51 void xpt_action(union ccb *new_ccb);
52 void xpt_setup_ccb(struct ccb_hdr *ccb_h,
53 struct cam_path *path,
54 u_int32_t priority);
55 void xpt_merge_ccb(union ccb *master_ccb,
56 union ccb *slave_ccb);
57 cam_status xpt_create_path(struct cam_path **new_path_ptr,
58 struct cam_periph *perph,
59 path_id_t path_id,
60 target_id_t target_id, lun_id_t lun_id);
61 cam_status xpt_create_path_unlocked(struct cam_path **new_path_ptr,
62 struct cam_periph *perph,
63 path_id_t path_id,
64 target_id_t target_id, lun_id_t lun_id);
65 void xpt_free_path(struct cam_path *path);
66 int xpt_path_comp(struct cam_path *path1,
67 struct cam_path *path2);
68 void xpt_print_path(struct cam_path *path);
69 void xpt_print(struct cam_path *path, const char *fmt, ...);
70 int xpt_path_string(struct cam_path *path, char *str,
71 size_t str_len);
72 path_id_t xpt_path_path_id(struct cam_path *path);
73 target_id_t xpt_path_target_id(struct cam_path *path);
74 lun_id_t xpt_path_lun_id(struct cam_path *path);
75 struct cam_sim *xpt_path_sim(struct cam_path *path);
76 struct cam_periph *xpt_path_periph(struct cam_path *path);
77 void xpt_async(u_int32_t async_code, struct cam_path *path,
78 void *async_arg);
79 void xpt_rescan(union ccb *ccb);
80 void xpt_lock_buses(void);
81 void xpt_unlock_buses(void);
82 cam_status xpt_register_async(int event, ac_callback_t *cbfunc,
83 void *cbarg, struct cam_path *path);
84 #endif /* _KERNEL */
85
86 #endif /* _CAM_CAM_XPT_H */
87
88
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