From d02b52e7b559b54c6beff960cec18b3e3627cdd0 Mon Sep 17 00:00:00 2001
From: Bruce Evans <bde@FreeBSD.org>
Date: Sun, 30 Jan 2000 07:58:14 +0000
Subject: [PATCH] Fixed longstanding brokenness of wddump() in LBA mode.  LBA
 mode may now be safe enough to recommend for working around the problem with
 CHS mode normally being limited to 65536*16*63 sectors.

Fixed bitrot in related debugging code.

Fixed related style bugs.

Removed another vestige of bad144 support.
---
 sys/i386/isa/wd.c | 41 +++++++++++++++++++++--------------------
 1 file changed, 21 insertions(+), 20 deletions(-)

diff --git a/sys/i386/isa/wd.c b/sys/i386/isa/wd.c
index 66ae5fcb247b..160bd2a4e32f 100644
--- a/sys/i386/isa/wd.c
+++ b/sys/i386/isa/wd.c
@@ -725,8 +725,7 @@ wdstart(int ctrlr)
 			sector = (blknum >> 0) & 0xff; 
 			cylin = (blknum >> 8) & 0xffff;
 			head = ((blknum >> 24) & 0xf) | WDSD_LBA; 
-		}
-		else {
+		} else {
 			cylin = blknum / secpercyl;
 			head = (blknum % secpercyl) / secpertrk;
 			sector = blknum % secpertrk;
@@ -1860,8 +1859,8 @@ wddump(dev_t dev)
 	blkoff += ds_offset;
 
 #if 0
-	pg("part %x, nblocks %d, dumplo %d num %d\n",
-	   part, nblocks, dumplo, num);
+	printf("part %d, nblocks %lu, dumplo %ld num %ld\n",
+	    part, nblocks, dumplo, num);
 #endif
 
 	/* Check transfer bounds against partition size. */
@@ -1894,28 +1893,30 @@ wddump(dev_t dev)
 		blkcnt = num;
 		if (blkcnt > MAXTRANSFER)
 			blkcnt = MAXTRANSFER;
-		/* Keep transfer within current cylinder. */
-		if ((blknum + blkcnt - 1) / secpercyl != blknum / secpercyl)
-			blkcnt = secpercyl - (blknum % secpercyl);
+		if ((du->dk_flags & DKFL_LBA) == 0) {
+			/* XXX keep transfer within current cylinder. */
+			if ((blknum + blkcnt - 1) / secpercyl !=
+			    blknum / secpercyl)
+				blkcnt = secpercyl - (blknum % secpercyl);
+		}
 		blknext = blknum + blkcnt;
 
-		/*
-		 * See if one of the sectors is in the bad sector list
-		 * (if we have one).  If the first sector is bad, then
-		 * reduce the transfer to this one bad sector; if another
-		 * sector is bad, then reduce reduce the transfer to
-		 * avoid any bad sectors.
-		 */
-
 		/* Compute disk address. */
-		cylin = blknum / secpercyl;
-		head = (blknum % secpercyl) / secpertrk;
-		sector = blknum % secpertrk;
+		if (du->dk_flags & DKFL_LBA) {
+			sector = (blknum >> 0) & 0xff; 
+			cylin = (blknum >> 8) & 0xffff;
+			head = ((blknum >> 24) & 0xf) | WDSD_LBA; 
+		} else {
+			cylin = blknum / secpercyl;
+			head = (blknum % secpercyl) / secpertrk;
+			sector = blknum % secpertrk;
+		}
 
 #if 0
 		/* Let's just talk about this first... */
-		pg("cylin l%d head %ld sector %ld addr 0x%x count %ld",
-		   cylin, head, sector, addr, blkcnt);
+		printf("cylin %ld head %ld sector %ld addr %p count %ld\n",
+		    cylin, head, sector, addr, blkcnt);
+		cngetc();
 #endif
 
 		/* Do the write. */