62 lines
2.5 KiB
C
62 lines
2.5 KiB
C
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#ifndef _SCSI_GENERIC_H_
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#define _SCSI_GENERIC_H_
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/*
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* Contributed by HD Associates (hd@world.std.com).
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* Copyright (c) 1992, 1993 HD Associates
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*
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* Berkeley style copyright. I've just snarfed it out of stdio.h:
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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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR 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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*/
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/* generic SCSI header file. We use the same minor number format
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* as on SGI except that the flag bits aren't available because they
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* are used as the board index.
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*
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* The minor number format is:
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* FF UUU III (FFUU UIII)
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*
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* Where:
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* FF is the board index
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* UUU are the LUN
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* III is the SCSI ID (controller)
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*/
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#define G_SCSI_FLAG(DEV) (((DEV) & 0xC0) >> 6)
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#define G_SCSI_UNIT(DEV) G_SCSI_FLAG(DEV)
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#define G_SCSI_LUN(DEV) (((DEV) & 0x38) >> 3)
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#define G_SCSI_ID(DEV) ((DEV) & 0x7)
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#define G_SCSI_MINOR(FLAG, LUN, ID) \
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(((FLAG) << 6) | ((LUN) << 3) | (ID))
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#endif /* _SCSI_GENERIC_H_ */
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