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 * $FreeBSD$
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_ed;
39 struct cam_sim;
40
41 /*
42 * Definition of a CAM path. Paths are created from bus, target, and lun ids
43 * via xpt_create_path and allow for reference to devices without recurring
44 * lookups in the edt.
45 */
46 struct cam_path;
47
48 /* Path functions */
49
50 #ifdef _KERNEL
51
52 /*
53 * Definition of an async handler callback block. These are used to add
54 * SIMs and peripherals to the async callback lists.
55 */
56 struct async_node {
57 SLIST_ENTRY(async_node) links;
58 u_int32_t event_enable; /* Async Event enables */
59 void (*callback)(void *arg, u_int32_t code,
60 struct cam_path *path, void *args);
61 void *callback_arg;
62 };
63
64 SLIST_HEAD(async_list, async_node);
65 SLIST_HEAD(periph_list, cam_periph);
66
67 void xpt_action(union ccb *new_ccb);
68 void xpt_action_default(union ccb *new_ccb);
69 union ccb *xpt_alloc_ccb(void);
70 union ccb *xpt_alloc_ccb_nowait(void);
71 void xpt_free_ccb(union ccb *free_ccb);
72 void xpt_setup_ccb(struct ccb_hdr *ccb_h,
73 struct cam_path *path,
74 u_int32_t priority);
75 void xpt_merge_ccb(union ccb *master_ccb,
76 union ccb *slave_ccb);
77 cam_status xpt_create_path(struct cam_path **new_path_ptr,
78 struct cam_periph *perph,
79 path_id_t path_id,
80 target_id_t target_id, lun_id_t lun_id);
81 cam_status xpt_create_path_unlocked(struct cam_path **new_path_ptr,
82 struct cam_periph *perph,
83 path_id_t path_id,
84 target_id_t target_id, lun_id_t lun_id);
85 int xpt_getattr(char *buf, size_t len, const char *attr,
86 struct cam_path *path);
87 void xpt_free_path(struct cam_path *path);
88 void xpt_path_counts(struct cam_path *path, uint32_t *bus_ref,
89 uint32_t *periph_ref, uint32_t *target_ref,
90 uint32_t *device_ref);
91 int xpt_path_comp(struct cam_path *path1,
92 struct cam_path *path2);
93 int xpt_path_comp_dev(struct cam_path *path,
94 struct cam_ed *dev);
95 void xpt_print_path(struct cam_path *path);
96 void xpt_print_device(struct cam_ed *device);
97 void xpt_print(struct cam_path *path, const char *fmt, ...);
98 int xpt_path_string(struct cam_path *path, char *str,
99 size_t str_len);
100 path_id_t xpt_path_path_id(struct cam_path *path);
101 target_id_t xpt_path_target_id(struct cam_path *path);
102 lun_id_t xpt_path_lun_id(struct cam_path *path);
103 int xpt_path_legacy_ata_id(struct cam_path *path);
104 struct cam_sim *xpt_path_sim(struct cam_path *path);
105 struct cam_periph *xpt_path_periph(struct cam_path *path);
106 void xpt_async(u_int32_t async_code, struct cam_path *path,
107 void *async_arg);
108 void xpt_rescan(union ccb *ccb);
109 void xpt_hold_boot(void);
110 void xpt_release_boot(void);
111 void xpt_lock_buses(void);
112 void xpt_unlock_buses(void);
113 cam_status xpt_register_async(int event, ac_callback_t *cbfunc,
114 void *cbarg, struct cam_path *path);
115 cam_status xpt_compile_path(struct cam_path *new_path,
116 struct cam_periph *perph,
117 path_id_t path_id,
118 target_id_t target_id,
119 lun_id_t lun_id);
120
121 void xpt_release_path(struct cam_path *path);
122
123 #endif /* _KERNEL */
124
125 #endif /* _CAM_CAM_XPT_H */
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