File: [local] / sys / dev / raidframe / rf_interdecluster.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:09:48 2008 UTC (16 years, 4 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
|
/* $OpenBSD: rf_interdecluster.c,v 1.4 2002/12/16 07:01:04 tdeval Exp $ */
/* $NetBSD: rf_interdecluster.c,v 1.4 2000/01/07 03:41:00 oster Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Khalil Amiri
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*************************************************************
*
* rf_interdecluster.c -- Implements interleaved declustering.
*
*************************************************************/
#include "rf_types.h"
#include "rf_raid.h"
#include "rf_interdecluster.h"
#include "rf_dag.h"
#include "rf_dagutils.h"
#include "rf_dagfuncs.h"
#include "rf_general.h"
#include "rf_utils.h"
#include "rf_dagffrd.h"
#include "rf_dagdegrd.h"
#include "rf_dagffwr.h"
#include "rf_dagdegwr.h"
typedef struct RF_InterdeclusterConfigInfo_s {
/* Filled in at config time and used by IdentifyStripe. */
RF_RowCol_t **stripeIdentifier;
RF_StripeCount_t numSparingRegions;
RF_StripeCount_t stripeUnitsPerSparingRegion;
RF_SectorNum_t mirrorStripeOffset;
} RF_InterdeclusterConfigInfo_t;
int
rf_ConfigureInterDecluster(RF_ShutdownList_t **listp, RF_Raid_t *raidPtr,
RF_Config_t *cfgPtr)
{
RF_RaidLayout_t *layoutPtr = &raidPtr->Layout;
RF_StripeCount_t num_used_stripeUnitsPerDisk;
RF_InterdeclusterConfigInfo_t *info;
RF_RowCol_t i, tmp, SUs_per_region;
/* Create an Interleaved Declustering configuration structure. */
RF_MallocAndAdd(info, sizeof(RF_InterdeclusterConfigInfo_t),
(RF_InterdeclusterConfigInfo_t *), raidPtr->cleanupList);
if (info == NULL)
return (ENOMEM);
layoutPtr->layoutSpecificInfo = (void *) info;
/* Fill in the config structure. */
SUs_per_region = raidPtr->numCol * (raidPtr->numCol - 1);
info->stripeIdentifier = rf_make_2d_array(SUs_per_region, 2,
raidPtr->cleanupList);
if (info->stripeIdentifier == NULL)
return (ENOMEM);
for (i = 0; i < SUs_per_region; i++) {
info->stripeIdentifier[i][0] = i / (raidPtr->numCol - 1);
tmp = i / raidPtr->numCol;
info->stripeIdentifier[i][1] = (i + 1 + tmp) % raidPtr->numCol;
}
/* No spare tables. */
RF_ASSERT(raidPtr->numRow == 1);
/* Fill in the remaining layout parameters. */
/*
* Total number of stripes should a multiple of 2*numCol: Each sparing
* region consists of 2*numCol stripes: n-1 primary copy, n-1
* secondary copy and 2 for spare...
*/
num_used_stripeUnitsPerDisk = layoutPtr->stripeUnitsPerDisk -
(layoutPtr->stripeUnitsPerDisk % (2 * raidPtr->numCol));
info->numSparingRegions = num_used_stripeUnitsPerDisk /
(2 * raidPtr->numCol);
/*
* This is in fact the number of stripe units (that are primary data
* copies) in the sparing region.
*/
info->stripeUnitsPerSparingRegion = raidPtr->numCol *
(raidPtr->numCol - 1);
info->mirrorStripeOffset = info->numSparingRegions *
(raidPtr->numCol + 1);
layoutPtr->numStripe = info->numSparingRegions *
info->stripeUnitsPerSparingRegion;
layoutPtr->bytesPerStripeUnit = layoutPtr->sectorsPerStripeUnit <<
raidPtr->logBytesPerSector;
layoutPtr->numDataCol = 1;
layoutPtr->dataSectorsPerStripe = layoutPtr->numDataCol *
layoutPtr->sectorsPerStripeUnit;
layoutPtr->numParityCol = 1;
layoutPtr->dataStripeUnitsPerDisk = num_used_stripeUnitsPerDisk;
raidPtr->sectorsPerDisk =
num_used_stripeUnitsPerDisk * layoutPtr->sectorsPerStripeUnit;
raidPtr->totalSectors =
(layoutPtr->numStripe) * layoutPtr->sectorsPerStripeUnit;
layoutPtr->stripeUnitsPerDisk = raidPtr->sectorsPerDisk /
layoutPtr->sectorsPerStripeUnit;
return (0);
}
int
rf_GetDefaultNumFloatingReconBuffersInterDecluster(RF_Raid_t *raidPtr)
{
return (30);
}
RF_HeadSepLimit_t
rf_GetDefaultHeadSepLimitInterDecluster(RF_Raid_t *raidPtr)
{
return (raidPtr->sectorsPerDisk);
}
RF_ReconUnitCount_t
rf_GetNumSpareRUsInterDecluster(RF_Raid_t *raidPtr)
{
RF_InterdeclusterConfigInfo_t *info = (RF_InterdeclusterConfigInfo_t *)
raidPtr->Layout.layoutSpecificInfo;
return (2 * ((RF_ReconUnitCount_t) info->numSparingRegions));
/*
* The layout uses two stripe units per disk as spare within each
* sparing region.
*/
}
/* Maps to the primary copy of the data, i.e. the first mirror pair. */
void
rf_MapSectorInterDecluster(RF_Raid_t *raidPtr, RF_RaidAddr_t raidSector,
RF_RowCol_t *row, RF_RowCol_t *col, RF_SectorNum_t* diskSector, int remap)
{
RF_InterdeclusterConfigInfo_t *info = (RF_InterdeclusterConfigInfo_t *)
raidPtr->Layout.layoutSpecificInfo;
RF_StripeNum_t SUID = raidSector / raidPtr->Layout.sectorsPerStripeUnit;
RF_StripeNum_t su_offset_into_disk, mirror_su_offset_into_disk;
RF_StripeNum_t sparing_region_id, index_within_region;
int col_before_remap;
*row = 0;
sparing_region_id = SUID / info->stripeUnitsPerSparingRegion;
index_within_region = SUID % info->stripeUnitsPerSparingRegion;
su_offset_into_disk = index_within_region % (raidPtr->numCol - 1);
mirror_su_offset_into_disk = index_within_region / raidPtr->numCol;
col_before_remap = index_within_region / (raidPtr->numCol - 1);
if (!remap) {
*col = col_before_remap;
*diskSector = (su_offset_into_disk + ((raidPtr->numCol - 1) *
sparing_region_id)) * raidPtr->Layout.sectorsPerStripeUnit;
*diskSector +=
(raidSector % raidPtr->Layout.sectorsPerStripeUnit);
} else {
/* Remap sector to spare space... */
*diskSector = sparing_region_id * (raidPtr->numCol + 1) *
raidPtr->Layout.sectorsPerStripeUnit;
*diskSector += (raidPtr->numCol - 1) *
raidPtr->Layout.sectorsPerStripeUnit;
*diskSector +=
(raidSector % raidPtr->Layout.sectorsPerStripeUnit);
*col = (index_within_region + 1 + mirror_su_offset_into_disk) %
raidPtr->numCol;
*col = (*col + 1) % raidPtr->numCol;
if (*col == col_before_remap)
*col = (*col + 1) % raidPtr->numCol;
}
}
/* Maps to the second copy of the mirror pair. */
void
rf_MapParityInterDecluster(RF_Raid_t *raidPtr, RF_RaidAddr_t raidSector,
RF_RowCol_t *row, RF_RowCol_t *col, RF_SectorNum_t *diskSector, int remap)
{
RF_InterdeclusterConfigInfo_t *info = (RF_InterdeclusterConfigInfo_t *)
raidPtr->Layout.layoutSpecificInfo;
RF_StripeNum_t sparing_region_id, index_within_region;
RF_StripeNum_t mirror_su_offset_into_disk;
RF_StripeNum_t SUID = raidSector / raidPtr->Layout.sectorsPerStripeUnit;
int col_before_remap;
sparing_region_id = SUID / info->stripeUnitsPerSparingRegion;
index_within_region = SUID % info->stripeUnitsPerSparingRegion;
mirror_su_offset_into_disk = index_within_region / raidPtr->numCol;
col_before_remap = (index_within_region + 1 +
mirror_su_offset_into_disk) % raidPtr->numCol;
*row = 0;
if (!remap) {
*col = col_before_remap;
*diskSector = info->mirrorStripeOffset *
raidPtr->Layout.sectorsPerStripeUnit;
*diskSector += sparing_region_id * (raidPtr->numCol - 1) *
raidPtr->Layout.sectorsPerStripeUnit;
*diskSector += mirror_su_offset_into_disk *
raidPtr->Layout.sectorsPerStripeUnit;
*diskSector +=
(raidSector % raidPtr->Layout.sectorsPerStripeUnit);
} else {
/* Remap parity to spare space... */
*diskSector = sparing_region_id * (raidPtr->numCol + 1) *
raidPtr->Layout.sectorsPerStripeUnit;
*diskSector += (raidPtr->numCol) *
raidPtr->Layout.sectorsPerStripeUnit;
*diskSector += (raidSector %
raidPtr->Layout.sectorsPerStripeUnit);
*col = index_within_region / (raidPtr->numCol - 1);
*col = (*col + 1) % raidPtr->numCol;
if (*col == col_before_remap)
*col = (*col + 1) % raidPtr->numCol;
}
}
void
rf_IdentifyStripeInterDecluster(RF_Raid_t *raidPtr, RF_RaidAddr_t addr,
RF_RowCol_t **diskids, RF_RowCol_t *outRow)
{
RF_InterdeclusterConfigInfo_t *info = (RF_InterdeclusterConfigInfo_t *)
raidPtr->Layout.layoutSpecificInfo;
RF_StripeNum_t SUID;
SUID = addr / raidPtr->Layout.sectorsPerStripeUnit;
SUID = SUID % info->stripeUnitsPerSparingRegion;
*outRow = 0;
*diskids = info->stripeIdentifier[SUID];
}
void
rf_MapSIDToPSIDInterDecluster( RF_RaidLayout_t *layoutPtr,
RF_StripeNum_t stripeID, RF_StripeNum_t *psID, RF_ReconUnitNum_t *which_ru)
{
*which_ru = 0;
*psID = stripeID;
}
/*****************************************************************************
* Select a graph to perform a single-stripe access.
*
* Parameters: raidPtr - Description of the physical array.
* type - Type of operation (read or write) requested.
* asmap - Logical & physical addresses for this access.
* createFunc - Name of function to use to create the graph.
*****************************************************************************/
void
rf_RAIDIDagSelect(RF_Raid_t *raidPtr, RF_IoType_t type,
RF_AccessStripeMap_t *asmap, RF_VoidFuncPtr *createFunc)
{
RF_ASSERT(RF_IO_IS_R_OR_W(type));
if (asmap->numDataFailed + asmap->numParityFailed > 1) {
RF_ERRORMSG("Multiple disks failed in a single group !"
" Aborting I/O operation.\n");
*createFunc = NULL;
return;
}
*createFunc = (type == RF_IO_TYPE_READ)
? (RF_VoidFuncPtr) rf_CreateFaultFreeReadDAG
: (RF_VoidFuncPtr) rf_CreateRaidOneWriteDAG;
if (type == RF_IO_TYPE_READ) {
if (asmap->numDataFailed == 0)
*createFunc = (RF_VoidFuncPtr)
rf_CreateMirrorPartitionReadDAG;
else
*createFunc = (RF_VoidFuncPtr)
rf_CreateRaidOneDegradedReadDAG;
} else
*createFunc = (RF_VoidFuncPtr) rf_CreateRaidOneWriteDAG;
}