From 5d396b316f35eb905c45d84a2d79f91ac8b02306 Mon Sep 17 00:00:00 2001
From: Sumant Patro <sumantp@lsil.com>
Date: Wed, 14 Feb 2007 12:41:55 -0800
Subject: [PATCH] --- yaml --- r: 49111 b: refs/heads/master c:
 cf62a0a543fbab15286509d2e04e3dcf5549e966 h: refs/heads/master i:   49109:
 6db178a785bc1482c299998ec0dccf76c8052e7e   49107:
 77d41c15095749cfcedf9b0f9be8e940028af53c   49103:
 530dedd89669b22903417e6c77f829fbeae4f094 v: v3

---
 [refs]                                     |  2 +-
 trunk/drivers/scsi/megaraid/megaraid_sas.c | 45 ++++++++++++++++++++++
 2 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 010ab410ca78..b15242ac5cd7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: af37acfb63d8e924550e67b884dbd1c478e26c96
+refs/heads/master: cf62a0a543fbab15286509d2e04e3dcf5549e966
diff --git a/trunk/drivers/scsi/megaraid/megaraid_sas.c b/trunk/drivers/scsi/megaraid/megaraid_sas.c
index 6ff540140807..9c5e4da5a132 100644
--- a/trunk/drivers/scsi/megaraid/megaraid_sas.c
+++ b/trunk/drivers/scsi/megaraid/megaraid_sas.c
@@ -35,6 +35,7 @@
 #include <asm/uaccess.h>
 #include <linux/fs.h>
 #include <linux/compat.h>
+#include <linux/blkdev.h>
 #include <linux/mutex.h>
 
 #include <scsi/scsi.h>
@@ -1014,6 +1015,49 @@ static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
 	return ret;
 }
 
+/**
+ * megasas_bios_param - Returns disk geometry for a disk
+ * @sdev: 		device handle
+ * @bdev:		block device
+ * @capacity:		drive capacity
+ * @geom:		geometry parameters
+ */
+static int
+megasas_bios_param(struct scsi_device *sdev, struct block_device *bdev,
+		 sector_t capacity, int geom[])
+{
+	int heads;
+	int sectors;
+	sector_t cylinders;
+	unsigned long tmp;
+	/* Default heads (64) & sectors (32) */
+	heads = 64;
+	sectors = 32;
+
+	tmp = heads * sectors;
+	cylinders = capacity;
+
+	sector_div(cylinders, tmp);
+
+	/*
+	 * Handle extended translation size for logical drives > 1Gb
+	 */
+
+	if (capacity >= 0x200000) {
+		heads = 255;
+		sectors = 63;
+		tmp = heads*sectors;
+		cylinders = capacity;
+		sector_div(cylinders, tmp);
+	}
+
+	geom[0] = heads;
+	geom[1] = sectors;
+	geom[2] = cylinders;
+
+	return 0;
+}
+
 /**
  * megasas_service_aen -	Processes an event notification
  * @instance:			Adapter soft state
@@ -1054,6 +1098,7 @@ static struct scsi_host_template megasas_template = {
 	.eh_device_reset_handler = megasas_reset_device,
 	.eh_bus_reset_handler = megasas_reset_bus_host,
 	.eh_host_reset_handler = megasas_reset_bus_host,
+	.bios_param = megasas_bios_param,
 	.use_clustering = ENABLE_CLUSTERING,
 };