File: [local] / sys / dev / raidframe / rf_raid5_rotatedspare.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:09:50 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_raid5_rotatedspare.c,v 1.4 2002/12/16 07:01:04 tdeval Exp $ */
/* $NetBSD: rf_raid5_rotatedspare.c,v 1.4 2000/01/07 03:41:03 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_raid5_rotated_spare.c -- Implements RAID Level 5 with rotated sparing.
*
*****************************************************************************/
#include "rf_raid.h"
#include "rf_raid5.h"
#include "rf_dag.h"
#include "rf_dagutils.h"
#include "rf_dagfuncs.h"
#include "rf_general.h"
#include "rf_utils.h"
#include "rf_raid5_rotatedspare.h"
typedef struct RF_Raid5RSConfigInfo_s {
RF_RowCol_t **stripeIdentifier; /*
* Filled in at config time & used by
* IdentifyStripe.
*/
} RF_Raid5RSConfigInfo_t;
int
rf_ConfigureRAID5_RS(RF_ShutdownList_t **listp, RF_Raid_t *raidPtr,
RF_Config_t *cfgPtr)
{
RF_RaidLayout_t *layoutPtr = &raidPtr->Layout;
RF_Raid5RSConfigInfo_t *info;
RF_RowCol_t i, j, startdisk;
/* Create a RAID level 5 configuration structure. */
RF_MallocAndAdd(info, sizeof(RF_Raid5RSConfigInfo_t),
(RF_Raid5RSConfigInfo_t *), raidPtr->cleanupList);
if (info == NULL)
return (ENOMEM);
layoutPtr->layoutSpecificInfo = (void *) info;
RF_ASSERT(raidPtr->numRow == 1);
RF_ASSERT(raidPtr->numCol >= 3);
/*
* The stripe identifier must identify the disks in each stripe, IN
* THE ORDER THAT THEY APPEAR IN THE STRIPE.
*/
info->stripeIdentifier = rf_make_2d_array(raidPtr->numCol,
raidPtr->numCol, raidPtr->cleanupList);
if (info->stripeIdentifier == NULL)
return (ENOMEM);
startdisk = 0;
for (i = 0; i < raidPtr->numCol; i++) {
for (j = 0; j < raidPtr->numCol; j++) {
info->stripeIdentifier[i][j] = (startdisk + j) %
raidPtr->numCol;
}
if ((--startdisk) < 0)
startdisk = raidPtr->numCol - 1;
}
/* Fill in the remaining layout parameters. */
layoutPtr->numStripe = layoutPtr->stripeUnitsPerDisk;
layoutPtr->bytesPerStripeUnit = layoutPtr->sectorsPerStripeUnit <<
raidPtr->logBytesPerSector;
layoutPtr->numDataCol = raidPtr->numCol - 2;
layoutPtr->dataSectorsPerStripe = layoutPtr->numDataCol *
layoutPtr->sectorsPerStripeUnit;
layoutPtr->numParityCol = 1;
layoutPtr->dataStripeUnitsPerDisk = layoutPtr->stripeUnitsPerDisk;
raidPtr->sectorsPerDisk = layoutPtr->stripeUnitsPerDisk *
layoutPtr->sectorsPerStripeUnit;
raidPtr->totalSectors = layoutPtr->stripeUnitsPerDisk *
layoutPtr->numDataCol * layoutPtr->sectorsPerStripeUnit;
return (0);
}
RF_ReconUnitCount_t
rf_GetNumSpareRUsRAID5_RS(RF_Raid_t *raidPtr)
{
return (raidPtr->Layout.stripeUnitsPerDisk / raidPtr->numCol);
}
void
rf_MapSectorRAID5_RS(RF_Raid_t *raidPtr, RF_RaidAddr_t raidSector,
RF_RowCol_t *row, RF_RowCol_t *col, RF_SectorNum_t *diskSector, int remap)
{
RF_StripeNum_t SUID = raidSector / raidPtr->Layout.sectorsPerStripeUnit;
*row = 0;
if (remap) {
*col = raidPtr->numCol - 1 -
(1 + SUID / raidPtr->Layout.numDataCol) % raidPtr->numCol;
*col = (*col + 1) % raidPtr->numCol; /*
* Spare unit is rotated
* with parity; line
* above maps to parity.
*/
} else {
*col = (SUID + (SUID / raidPtr->Layout.numDataCol)) %
raidPtr->numCol;
}
*diskSector = (SUID / (raidPtr->Layout.numDataCol)) *
raidPtr->Layout.sectorsPerStripeUnit +
(raidSector % raidPtr->Layout.sectorsPerStripeUnit);
}
void
rf_MapParityRAID5_RS(RF_Raid_t *raidPtr, RF_RaidAddr_t raidSector,
RF_RowCol_t *row, RF_RowCol_t *col, RF_SectorNum_t *diskSector, int remap)
{
RF_StripeNum_t SUID = raidSector / raidPtr->Layout.sectorsPerStripeUnit;
*row = 0;
*col = raidPtr->numCol - 1 - (1 + SUID / raidPtr->Layout.numDataCol) %
raidPtr->numCol;
*diskSector = (SUID / (raidPtr->Layout.numDataCol)) *
raidPtr->Layout.sectorsPerStripeUnit +
(raidSector % raidPtr->Layout.sectorsPerStripeUnit);
if (remap)
*col = (*col + 1) % raidPtr->numCol;
}
void
rf_IdentifyStripeRAID5_RS(RF_Raid_t *raidPtr, RF_RaidAddr_t addr,
RF_RowCol_t **diskids, RF_RowCol_t *outRow)
{
RF_StripeNum_t stripeID =
rf_RaidAddressToStripeID(&raidPtr->Layout, addr);
RF_Raid5RSConfigInfo_t *info =
(RF_Raid5RSConfigInfo_t *) raidPtr->Layout.layoutSpecificInfo;
*outRow = 0;
*diskids = info->stripeIdentifier[stripeID % raidPtr->numCol];
}
void
rf_MapSIDToPSIDRAID5_RS(RF_RaidLayout_t *layoutPtr, RF_StripeNum_t stripeID,
RF_StripeNum_t *psID, RF_ReconUnitNum_t *which_ru)
{
*which_ru = 0;
*psID = stripeID;
}