1 /* $NetBSD: rf_desc.h,v 1.12.2.2 2004/06/28 08:33:01 tron Exp $ */
2 /*
3 * Copyright (c) 1995 Carnegie-Mellon University.
4 * All rights reserved.
5 *
6 * Author: Mark Holland
7 *
8 * Permission to use, copy, modify and distribute this software and
9 * its documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
13 *
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
16 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
17 *
18 * Carnegie Mellon requests users of this software to return to
19 *
20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
21 * School of Computer Science
22 * Carnegie Mellon University
23 * Pittsburgh PA 15213-3890
24 *
25 * any improvements or extensions that they make and grant Carnegie the
26 * rights to redistribute these changes.
27 */
28
29 #ifndef _RF__RF_DESC_H_
30 #define _RF__RF_DESC_H_
31
32 #include <dev/raidframe/raidframevar.h>
33
34 #include "rf_archs.h"
35 #include "rf_etimer.h"
36 #include "rf_dag.h"
37 #include "rf_layout.h"
38
39 struct RF_RaidReconDesc_s {
40 RF_Raid_t *raidPtr; /* raid device descriptor */
41 RF_RowCol_t col; /* col of failed disk */
42 int state; /* how far along the reconstruction operation
43 * has gotten */
44 RF_RaidDisk_t *spareDiskPtr; /* describes target disk for recon
45 * (not used in dist sparing) */
46 int numDisksDone; /* the number of surviving disks that have
47 * completed their work */
48 RF_RowCol_t scol; /* col ID of the spare disk (not used in dist
49 * sparing) */
50 /*
51 * Prevent recon from hogging CPU
52 */
53 RF_Etimer_t recon_exec_timer;
54 RF_uint64 reconExecTimerRunning;
55 RF_uint64 reconExecTicks;
56 RF_uint64 maxReconExecTicks;
57
58 #if RF_RECON_STATS > 0
59 RF_uint64 hsStallCount; /* head sep stall count */
60 RF_uint64 numReconExecDelays;
61 RF_uint64 numReconEventWaits;
62 #endif /* RF_RECON_STATS > 0 */
63 RF_RaidReconDesc_t *next;
64 };
65
66 struct RF_RaidAccessDesc_s {
67 RF_Raid_t *raidPtr; /* raid device descriptor */
68 RF_IoType_t type; /* read or write */
69 RF_RaidAddr_t raidAddress; /* starting address in raid address
70 * space */
71 RF_SectorCount_t numBlocks; /* number of blocks (sectors) to
72 * transfer */
73 RF_StripeCount_t numStripes; /* number of stripes involved in
74 * access */
75 caddr_t bufPtr; /* pointer to data buffer */
76 RF_RaidAccessFlags_t flags; /* flags controlling operation */
77 int state; /* index into states telling how far along the
78 * RAID operation has gotten */
79 const RF_AccessState_t *states; /* array of states to be run */
80 int status; /* pass/fail status of the last operation */
81 RF_DagList_t *dagList; /* list of dag lists, one list per stripe */
82 RF_VoidPointerListElem_t *iobufs; /* iobufs that need to be cleaned
83 up at the end of this IO */
84 RF_VoidPointerListElem_t *stripebufs; /* stripe buffers that need to
85 be cleaned up at the end of
86 this IO */
87 RF_AccessStripeMapHeader_t *asmap; /* the asm for this I/O */
88 void *bp; /* buf pointer for this RAID acc. ignored
89 * outside the kernel */
90 RF_AccTraceEntry_t tracerec; /* perf monitoring information for a
91 * user access (not for dag stats) */
92 void (*callbackFunc) (RF_CBParam_t); /* callback function for this
93 * I/O */
94 void *callbackArg; /* arg to give to callback func */
95 RF_RaidAccessDesc_t *next;
96 int async_flag;
97 RF_Etimer_t timer; /* used for timing this access */
98 };
99 #endif /* !_RF__RF_DESC_H_ */
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