1/* $NetBSD: rf_desc.h,v 1.20 2007/03/04 06:02:36 christos 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
39struct RF_RaidReconDesc_s {
40 RF_Raid_t *raidPtr; /* raid device descriptor */
41 RF_RowCol_t col; /* col of failed disk */
42 RF_RaidDisk_t *spareDiskPtr; /* describes target disk for recon
43 * (not used in dist sparing) */
44 int numDisksDone; /* the number of surviving disks that have
45 * completed their work */
46 RF_RowCol_t scol; /* col ID of the spare disk (not used in dist
47 * sparing) */
48 /*
49 * Prevent recon from hogging CPU
50 */
51 RF_Etimer_t recon_exec_timer;
52 RF_uint64 reconExecTimerRunning;
53 RF_uint64 reconExecTicks;
54 RF_uint64 maxReconExecTicks;
55
56#if RF_RECON_STATS > 0
57 RF_uint64 hsStallCount; /* head sep stall count */
58 RF_uint64 numReconExecDelays;
59 RF_uint64 numReconEventWaits;
60#endif /* RF_RECON_STATS > 0 */
61 RF_RaidReconDesc_t *next;
62};
63
64struct RF_RaidAccessDesc_s {
65 RF_Raid_t *raidPtr; /* raid device descriptor */
66 RF_IoType_t type; /* read or write */
67 RF_RaidAddr_t raidAddress; /* starting address in raid address
68 * space */
69 RF_SectorCount_t numBlocks; /* number of blocks (sectors) to
70 * transfer */
71 RF_StripeCount_t numStripes; /* number of stripes involved in
72 * access */
73 void *bufPtr; /* pointer to data buffer */
74 RF_RaidAccessFlags_t flags; /* flags controlling operation */
75 int state; /* index into states telling how far along the
76 * RAID operation has gotten */
77 const RF_AccessState_t *states; /* array of states to be run */
78 int status; /* pass/fail status of the last operation */
79 int numRetries; /* number of times this IO has been attempted */
80 RF_DagList_t *dagList; /* list of dag lists, one list per stripe */
81 RF_VoidPointerListElem_t *iobufs; /* iobufs that need to be cleaned
82 up at the end of this IO */
83 RF_VoidPointerListElem_t *stripebufs; /* stripe buffers that need to
84 be cleaned up at the end of
85 this IO */
86 RF_AccessStripeMapHeader_t *asmap; /* the asm for this I/O */
87 struct buf *bp; /* buf pointer for this RAID acc */
88 RF_AccTraceEntry_t tracerec; /* perf monitoring information for a
89 * user access (not for dag stats) */
90 void (*callbackFunc) (RF_CBParam_t); /* callback function for this
91 * I/O */
92 void *callbackArg; /* arg to give to callback func */
93 RF_RaidAccessDesc_t *next;
94 int async_flag;
95 RF_Etimer_t timer; /* used for timing this access */
96};
97#endif /* !_RF__RF_DESC_H_ */
98