From 710948de69ddeae56bda663219319f6d859aea1f Mon Sep 17 00:00:00 2001
From: scottl <scottl@FreeBSD.org>
Date: Sun, 20 Oct 2002 08:17:39 +0000
Subject: After much delay and anticipation, welcome RAIDFrame into the FreeBSD
 world.  This should be considered highly experimental.

Approved-by:	re
---
 sys/dev/raidframe/rf_raid0.c | 161 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 sys/dev/raidframe/rf_raid0.c

(limited to 'sys/dev/raidframe/rf_raid0.c')

diff --git a/sys/dev/raidframe/rf_raid0.c b/sys/dev/raidframe/rf_raid0.c
new file mode 100644
index 0000000..a9418d3
--- /dev/null
+++ b/sys/dev/raidframe/rf_raid0.c
@@ -0,0 +1,161 @@
+/*	$FreeBSD$ */
+/*	$NetBSD: rf_raid0.c,v 1.4 2000/01/07 03:41:02 oster Exp $	*/
+/*
+ * Copyright (c) 1995 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Author: Mark Holland
+ *
+ * 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_raid0.c -- implements RAID Level 0
+ *
+ ***************************************/
+
+#include <dev/raidframe/rf_types.h>
+#include <dev/raidframe/rf_raid.h>
+#include <dev/raidframe/rf_raid0.h>
+#include <dev/raidframe/rf_dag.h>
+#include <dev/raidframe/rf_dagffrd.h>
+#include <dev/raidframe/rf_dagffwr.h>
+#include <dev/raidframe/rf_dagutils.h>
+#include <dev/raidframe/rf_dagfuncs.h>
+#include <dev/raidframe/rf_general.h>
+#include <dev/raidframe/rf_configure.h>
+#include <dev/raidframe/rf_parityscan.h>
+
+typedef struct RF_Raid0ConfigInfo_s {
+	RF_RowCol_t *stripeIdentifier;
+}       RF_Raid0ConfigInfo_t;
+
+int 
+rf_ConfigureRAID0(
+    RF_ShutdownList_t ** listp,
+    RF_Raid_t * raidPtr,
+    RF_Config_t * cfgPtr)
+{
+	RF_RaidLayout_t *layoutPtr = &raidPtr->Layout;
+	RF_Raid0ConfigInfo_t *info;
+	RF_RowCol_t i;
+
+	/* create a RAID level 0 configuration structure */
+	RF_MallocAndAdd(info, sizeof(RF_Raid0ConfigInfo_t), (RF_Raid0ConfigInfo_t *), raidPtr->cleanupList);
+	if (info == NULL)
+		return (ENOMEM);
+	layoutPtr->layoutSpecificInfo = (void *) info;
+
+	RF_MallocAndAdd(info->stripeIdentifier, raidPtr->numCol * sizeof(RF_RowCol_t), (RF_RowCol_t *), raidPtr->cleanupList);
+	if (info->stripeIdentifier == NULL)
+		return (ENOMEM);
+	for (i = 0; i < raidPtr->numCol; i++)
+		info->stripeIdentifier[i] = i;
+
+	RF_ASSERT(raidPtr->numRow == 1);
+	raidPtr->totalSectors = layoutPtr->stripeUnitsPerDisk * raidPtr->numCol * layoutPtr->sectorsPerStripeUnit;
+	layoutPtr->numStripe = layoutPtr->stripeUnitsPerDisk;
+	layoutPtr->dataSectorsPerStripe = raidPtr->numCol * layoutPtr->sectorsPerStripeUnit;
+	layoutPtr->bytesPerStripeUnit = layoutPtr->sectorsPerStripeUnit << raidPtr->logBytesPerSector;
+	layoutPtr->numDataCol = raidPtr->numCol;
+	layoutPtr->numParityCol = 0;
+	return (0);
+}
+
+void 
+rf_MapSectorRAID0(
+    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 = SUID % raidPtr->numCol;
+	*diskSector = (SUID / raidPtr->numCol) * raidPtr->Layout.sectorsPerStripeUnit +
+	    (raidSector % raidPtr->Layout.sectorsPerStripeUnit);
+}
+
+void 
+rf_MapParityRAID0(
+    RF_Raid_t * raidPtr,
+    RF_RaidAddr_t raidSector,
+    RF_RowCol_t * row,
+    RF_RowCol_t * col,
+    RF_SectorNum_t * diskSector,
+    int remap)
+{
+	*row = *col = 0;
+	*diskSector = 0;
+}
+
+void 
+rf_IdentifyStripeRAID0(
+    RF_Raid_t * raidPtr,
+    RF_RaidAddr_t addr,
+    RF_RowCol_t ** diskids,
+    RF_RowCol_t * outRow)
+{
+	RF_Raid0ConfigInfo_t *info;
+
+	info = raidPtr->Layout.layoutSpecificInfo;
+	*diskids = info->stripeIdentifier;
+	*outRow = 0;
+}
+
+void 
+rf_MapSIDToPSIDRAID0(
+    RF_RaidLayout_t * layoutPtr,
+    RF_StripeNum_t stripeID,
+    RF_StripeNum_t * psID,
+    RF_ReconUnitNum_t * which_ru)
+{
+	*which_ru = 0;
+	*psID = stripeID;
+}
+
+void 
+rf_RAID0DagSelect(
+    RF_Raid_t * raidPtr,
+    RF_IoType_t type,
+    RF_AccessStripeMap_t * asmap,
+    RF_VoidFuncPtr * createFunc)
+{
+	*createFunc = ((type == RF_IO_TYPE_READ) ?
+	    (RF_VoidFuncPtr) rf_CreateFaultFreeReadDAG : (RF_VoidFuncPtr) rf_CreateRAID0WriteDAG);
+}
+
+int 
+rf_VerifyParityRAID0(
+    RF_Raid_t * raidPtr,
+    RF_RaidAddr_t raidAddr,
+    RF_PhysDiskAddr_t * parityPDA,
+    int correct_it,
+    RF_RaidAccessFlags_t flags)
+{
+	/*
+         * No parity is always okay.
+         */
+	return (RF_PARITY_OKAY);
+}
-- 
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