30f8afd027
xpt_bus_register and xpt_bus_deregister returns a hybrid error that's neither a cam_status, nor an errno, but a mix of both. Update xpt_bus_register and xpt_bus_deregister to return an errno. The vast majority of current users compare against zero, which can also be spelled CAM_SUCCESS. Nobody uses CAM_FAILURE, so remove that symbol to prevent comfusion (nothing returns it either). Where the return value is saved, ensure that the variable 'error' is used to store an errno and 'status' is used to store a cam_status where it makes the code clearer (usually just in functions that already mix and match). Where the return value isn't used at all, avoid storing it at all. Reviewed by: scottl@, mav@ (earlier version) Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D30860
55 lines
2.2 KiB
C
55 lines
2.2 KiB
C
/*-
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* Data structures and definitions for dealing with the
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* Common Access Method Transport (xpt) layer.
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*
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1997 Justin T. Gibbs.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _CAM_CAM_XPT_SIM_H
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#define _CAM_CAM_XPT_SIM_H 1
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#include <cam/cam_xpt.h>
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#include <cam/cam_queue.h>
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/* Functions accessed by SIM drivers */
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#ifdef _KERNEL
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int xpt_bus_register(struct cam_sim *sim, device_t parent,
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uint32_t bus);
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int xpt_bus_deregister(path_id_t path_id);
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u_int32_t xpt_freeze_simq(struct cam_sim *sim, u_int count);
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void xpt_release_simq(struct cam_sim *sim, int run_queue);
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u_int32_t xpt_freeze_devq(struct cam_path *path, u_int count);
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void xpt_release_devq(struct cam_path *path,
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u_int count, int run_queue);
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void xpt_done(union ccb *done_ccb);
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void xpt_done_direct(union ccb *done_ccb);
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#endif
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#endif /* _CAM_CAM_XPT_SIM_H */
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