The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/cam/cam_xpt.h

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    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: releng/7.3/sys/cam/cam_xpt.h 169605 2007-05-16 16:54:23Z scottl $
   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 

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