1/*- 2 * Data structures and definitions for dealing with the 3 * Common Access Method Transport (xpt) layer. 4 * 5 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 6 * 7 * Copyright (c) 1997 Justin T. Gibbs. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions, and the following disclaimer, 15 * without modification, immediately at the beginning of the file. 16 * 2. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34#ifndef _CAM_CAM_XPT_H 35#define _CAM_CAM_XPT_H 1 36 37#ifdef _KERNEL 38#include <sys/cdefs.h> 39#include <cam/cam_ccb.h> 40#endif 41 42 43/* Forward Declarations */ 44union ccb; 45struct cam_periph; 46struct cam_ed; 47struct cam_sim; 48struct sbuf; 49 50/* 51 * Definition of a CAM path. Paths are created from bus, target, and lun ids 52 * via xpt_create_path and allow for reference to devices without recurring 53 * lookups in the edt. 54 */ 55struct cam_path; 56 57/* Path functions */ 58 59#ifdef _KERNEL 60 61/* 62 * Definition of an async handler callback block. These are used to add 63 * SIMs and peripherals to the async callback lists. 64 */ 65struct async_node { 66 SLIST_ENTRY(async_node) links; 67 u_int32_t event_enable; /* Async Event enables */ 68 u_int32_t event_lock; /* Take SIM lock for handlers. */ 69 void (*callback)(void *arg, u_int32_t code, 70 struct cam_path *path, void *args); 71 void *callback_arg; 72}; 73 74SLIST_HEAD(async_list, async_node); 75SLIST_HEAD(periph_list, cam_periph); 76 77void xpt_action(union ccb *new_ccb); 78void xpt_action_default(union ccb *new_ccb); 79union ccb *xpt_alloc_ccb(void); 80union ccb *xpt_alloc_ccb_nowait(void); 81void xpt_free_ccb(union ccb *free_ccb); 82void xpt_setup_ccb_flags(struct ccb_hdr *ccb_h, 83 struct cam_path *path, 84 u_int32_t priority, 85 u_int32_t flags); 86void xpt_setup_ccb(struct ccb_hdr *ccb_h, 87 struct cam_path *path, 88 u_int32_t priority); 89void xpt_merge_ccb(union ccb *master_ccb, 90 union ccb *slave_ccb); 91cam_status xpt_create_path(struct cam_path **new_path_ptr, 92 struct cam_periph *perph, 93 path_id_t path_id, 94 target_id_t target_id, lun_id_t lun_id); 95cam_status xpt_create_path_unlocked(struct cam_path **new_path_ptr, 96 struct cam_periph *perph, 97 path_id_t path_id, 98 target_id_t target_id, lun_id_t lun_id); 99int xpt_getattr(char *buf, size_t len, const char *attr, 100 struct cam_path *path); 101void xpt_free_path(struct cam_path *path); 102void xpt_path_counts(struct cam_path *path, uint32_t *bus_ref, 103 uint32_t *periph_ref, uint32_t *target_ref, 104 uint32_t *device_ref); 105int xpt_path_comp(struct cam_path *path1, 106 struct cam_path *path2); 107int xpt_path_comp_dev(struct cam_path *path, 108 struct cam_ed *dev); 109void xpt_print_path(struct cam_path *path); 110void xpt_print_device(struct cam_ed *device); 111void xpt_print(struct cam_path *path, const char *fmt, ...); 112int xpt_path_string(struct cam_path *path, char *str, 113 size_t str_len); 114int xpt_path_sbuf(struct cam_path *path, struct sbuf *sb); 115path_id_t xpt_path_path_id(struct cam_path *path); 116target_id_t xpt_path_target_id(struct cam_path *path); 117lun_id_t xpt_path_lun_id(struct cam_path *path); 118struct cam_sim *xpt_path_sim(struct cam_path *path); 119struct cam_periph *xpt_path_periph(struct cam_path *path); 120void xpt_async(u_int32_t async_code, struct cam_path *path, 121 void *async_arg); 122void xpt_rescan(union ccb *ccb); 123void xpt_hold_boot(void); 124void xpt_release_boot(void); 125void xpt_lock_buses(void); 126void xpt_unlock_buses(void); 127struct mtx * xpt_path_mtx(struct cam_path *path); 128#define xpt_path_lock(path) mtx_lock(xpt_path_mtx(path)) 129#define xpt_path_unlock(path) mtx_unlock(xpt_path_mtx(path)) 130#define xpt_path_assert(path, what) mtx_assert(xpt_path_mtx(path), (what)) 131#define xpt_path_owned(path) mtx_owned(xpt_path_mtx(path)) 132#define xpt_path_sleep(path, chan, priority, wmesg, timo) \ 133 msleep((chan), xpt_path_mtx(path), (priority), (wmesg), (timo)) 134cam_status xpt_register_async(int event, ac_callback_t *cbfunc, 135 void *cbarg, struct cam_path *path); 136cam_status xpt_compile_path(struct cam_path *new_path, 137 struct cam_periph *perph, 138 path_id_t path_id, 139 target_id_t target_id, 140 lun_id_t lun_id); 141cam_status xpt_clone_path(struct cam_path **new_path, 142 struct cam_path *path); 143 144void xpt_release_path(struct cam_path *path); 145 146const char * xpt_action_name(uint32_t action); 147void xpt_pollwait(union ccb *start_ccb, uint32_t timeout); 148uint32_t xpt_poll_setup(union ccb *start_ccb); 149void xpt_sim_poll(struct cam_sim *sim); 150 151/* 152 * Perform a path inquiry at the request priority. The bzero may be 153 * unnecessary. 154 */ 155static inline void 156xpt_path_inq(struct ccb_pathinq *cpi, struct cam_path *path) 157{ 158 159 bzero(cpi, sizeof(*cpi)); 160 xpt_setup_ccb(&cpi->ccb_h, path, CAM_PRIORITY_NORMAL); 161 cpi->ccb_h.func_code = XPT_PATH_INQ; 162 xpt_action((union ccb *)cpi); 163} 164 165#endif /* _KERNEL */ 166 167#endif /* _CAM_CAM_XPT_H */ 168