ctl_ser_table.c revision 288802 
1/*-
2 * Copyright (c) 2003 Silicon Graphics International Corp.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions, and the following disclaimer,
10 *    without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 *    substantially similar to the "NO WARRANTY" disclaimer below
13 *    ("Disclaimer") and any redistribution must be conditioned upon
14 *    including a substantially similar Disclaimer requirement for further
15 *    binary redistribution.
16 *
17 * NO WARRANTY
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGES.
29 *
30 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_ser_table.c#1 $
31 * $FreeBSD: stable/10/sys/cam/ctl/ctl_ser_table.c 288802 2015-10-05 11:05:04Z mav $
32 */
33
34/*
35 * CAM Target Layer command serialization table.
36 *
37 * Author: Kim Le
38 */
39
40/****************************************************************************/
41/* TABLE       ctlSerTbl                                                    */
42/*                                                                          */
43/*  The matrix which drives the serialization algorithm. The major index    */
44/*  (the first) into this table is the command being checked and the minor  */
45/*  index is the command against which the first command is being checked.  */
46/*  i.e., the major index (row) command is ahead of the minor index command */
47/*  (column) in the queue.  This allows the code to optimize by capturing   */
48/*  the result of the first indexing operation into a pointer.              */
49/*                                                                          */
50/*  Whenever a new value is added to the IDX_T type, this matrix must be    */
51/*  expanded by one row AND one column -- Because of this, some effort      */
52/*  should be made to re-use the indexes whenever possible.                 */
53/*                                                                          */
54/****************************************************************************/
55
56#define	sK	CTL_SER_SKIP		/* Skip */
57#define	pS	CTL_SER_PASS		/* Pass */
58#define	bK	CTL_SER_BLOCK		/* Blocked */
59#define	bO	CTL_SER_BLOCKOPT	/* Optional block */
60#define	xT	CTL_SER_EXTENT		/* Extent check */
61#define	xO	CTL_SER_EXTENTOPT	/* Optional extent check */
62#define	xS	CTL_SER_EXTENTSEQ	/* Sequential extent check */
63
64const static ctl_serialize_action
65ctl_serialize_table[CTL_SERIDX_COUNT][CTL_SERIDX_COUNT] = {
66/**>IDX_ :: 2nd:TUR RD  WRT UNM SYN MDSN MDSL RQSN INQ RDCP RES LSNS FMT STR*/
67/*TUR     */{   pS, pS, pS, pS, pS, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
68/*READ    */{   pS, xS, xT, bO, pS, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
69/*WRITE   */{   pS, xT, xT, bO, bO, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
70/*UNMAP   */{   pS, xO, xO, pS, pS, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
71/*SYNC    */{   pS, pS, pS, pS, pS, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
72/*MD_SNS  */{   bK, bK, bK, bK, bK, pS,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
73/*MD_SEL  */{   bK, bK, bK, bK, bK, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
74/*RQ_SNS  */{   pS, pS, pS, pS, pS, pS,  pS,  bK,  pS, pS,  bK, pS,  bK, bK},
75/*INQ     */{   pS, pS, pS, pS, pS, pS,  pS,  bK,  pS, pS,  pS, pS,  bK, bK},
76/*RD_CAP  */{   pS, pS, pS, pS, pS, pS,  pS,  bK,  pS, pS,  pS, pS,  bK, pS},
77/*RES     */{   bK, bK, bK, bK, bK, bK,  bK,  bK,  pS, bK,  bK, bK,  bK, bK},
78/*LOG_SNS */{   pS, pS, pS, pS, pS, pS,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
79/*FORMAT  */{   pS, bK, bK, bK, bK, bK,  bK,  pS,  pS, bK,  bK, bK,  bK, bK},
80/*START   */{   bK, bK, bK, bK, bK, bK,  bK,  bK,  pS, bK,  bK, bK,  bK, bK},
81};
82
83