xref: /freebsd/sys/cam/ctl/ctl_ser_table.c (revision da7d7b9c861cf98e912c0bd1e549752d2dae4fb6)
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  * $FreeBSD$
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 
64 static ctl_serialize_action
65 ctl_serialize_table[CTL_SERIDX_COUNT][CTL_SERIDX_COUNT] = {
66 /**>IDX_ :: 2nd:TUR RD  WRT UNM MDSN MDSL RQSN INQ RDCP RES LSNS FMT STR*/
67 /*TUR     */{   pS, pS, pS, pS, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
68 /*READ    */{   pS, xS, xT, bO, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
69 /*WRITE   */{   pS, xT, xT, bO, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
70 /*UNMAP   */{   pS, xO, xO, pS, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
71 /*MD_SNS  */{   bK, bK, bK, bK, pS,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
72 /*MD_SEL  */{   bK, bK, bK, bK, bK,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
73 /*RQ_SNS  */{   pS, pS, pS, pS, pS,  pS,  bK,  pS, pS,  bK, pS,  bK, bK},
74 /*INQ     */{   pS, pS, pS, pS, pS,  pS,  bK,  pS, pS,  pS, pS,  bK, bK},
75 /*RD_CAP  */{   pS, pS, pS, pS, pS,  pS,  bK,  pS, pS,  pS, pS,  bK, pS},
76 /*RES     */{   bK, bK, bK, bK, bK,  bK,  bK,  pS, bK,  bK, bK,  bK, bK},
77 /*LOG_SNS */{   pS, pS, pS, pS, pS,  bK,  bK,  pS, pS,  bK, pS,  bK, bK},
78 /*FORMAT  */{   pS, bK, bK, bK, bK,  bK,  pS,  pS, bK,  bK, bK,  bK, bK},
79 /*START   */{   bK, bK, bK, bK, bK,  bK,  bK,  pS, bK,  bK, bK,  bK, bK},
80 };
81 
82