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 u_int32_t event_lock; /* Take SIM lock for handlers. */ 60 void (*callback)(void *arg, u_int32_t code, 61 struct cam_path *path, void *args); 62 void *callback_arg; 63 }; 64 65 SLIST_HEAD(async_list, async_node); 66 SLIST_HEAD(periph_list, cam_periph); 67 68 void xpt_action(union ccb *new_ccb); 69 void xpt_action_default(union ccb *new_ccb); 70 union ccb *xpt_alloc_ccb(void); 71 union ccb *xpt_alloc_ccb_nowait(void); 72 void xpt_free_ccb(union ccb *free_ccb); 73 void xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, 74 struct cam_path *path, 75 u_int32_t priority, 76 u_int32_t flags); 77 void xpt_setup_ccb(struct ccb_hdr *ccb_h, 78 struct cam_path *path, 79 u_int32_t priority); 80 void xpt_merge_ccb(union ccb *master_ccb, 81 union ccb *slave_ccb); 82 cam_status xpt_create_path(struct cam_path **new_path_ptr, 83 struct cam_periph *perph, 84 path_id_t path_id, 85 target_id_t target_id, lun_id_t lun_id); 86 cam_status xpt_create_path_unlocked(struct cam_path **new_path_ptr, 87 struct cam_periph *perph, 88 path_id_t path_id, 89 target_id_t target_id, lun_id_t lun_id); 90 int xpt_getattr(char *buf, size_t len, const char *attr, 91 struct cam_path *path); 92 void xpt_free_path(struct cam_path *path); 93 void xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 94 uint32_t *periph_ref, uint32_t *target_ref, 95 uint32_t *device_ref); 96 int xpt_path_comp(struct cam_path *path1, 97 struct cam_path *path2); 98 int xpt_path_comp_dev(struct cam_path *path, 99 struct cam_ed *dev); 100 void xpt_print_path(struct cam_path *path); 101 void xpt_print_device(struct cam_ed *device); 102 void xpt_print(struct cam_path *path, const char *fmt, ...); 103 int xpt_path_string(struct cam_path *path, char *str, 104 size_t str_len); 105 path_id_t xpt_path_path_id(struct cam_path *path); 106 target_id_t xpt_path_target_id(struct cam_path *path); 107 lun_id_t xpt_path_lun_id(struct cam_path *path); 108 struct cam_sim *xpt_path_sim(struct cam_path *path); 109 struct cam_periph *xpt_path_periph(struct cam_path *path); 110 void xpt_async(u_int32_t async_code, struct cam_path *path, 111 void *async_arg); 112 void xpt_rescan(union ccb *ccb); 113 void xpt_hold_boot(void); 114 void xpt_release_boot(void); 115 void xpt_lock_buses(void); 116 void xpt_unlock_buses(void); 117 struct mtx * xpt_path_mtx(struct cam_path *path); 118 #define xpt_path_lock(path) mtx_lock(xpt_path_mtx(path)) 119 #define xpt_path_unlock(path) mtx_unlock(xpt_path_mtx(path)) 120 #define xpt_path_assert(path, what) mtx_assert(xpt_path_mtx(path), (what)) 121 #define xpt_path_owned(path) mtx_owned(xpt_path_mtx(path)) 122 #define xpt_path_sleep(path, chan, priority, wmesg, timo) \ 123 msleep((chan), xpt_path_mtx(path), (priority), (wmesg), (timo)) 124 cam_status xpt_register_async(int event, ac_callback_t *cbfunc, 125 void *cbarg, struct cam_path *path); 126 cam_status xpt_compile_path(struct cam_path *new_path, 127 struct cam_periph *perph, 128 path_id_t path_id, 129 target_id_t target_id, 130 lun_id_t lun_id); 131 cam_status xpt_clone_path(struct cam_path **new_path, 132 struct cam_path *path); 133 void xpt_copy_path(struct cam_path *new_path, 134 struct cam_path *path); 135 136 void xpt_release_path(struct cam_path *path); 137 138 #endif /* _KERNEL */ 139 140 #endif /* _CAM_CAM_XPT_H */ 141