lkml.org 
[lkml]   [2007]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH 2/6] scsi: megaraid_sas - added bios_param in scsi_host_template
From
Date

Added bios_param in scsi_host_template to return disk geometry.

Signed-off-by: Sumant Patro <sumant.patro@lsi.com>
---
drivers/scsi/megaraid/megaraid_sas.c | 45 +++++++++++++++++++++++++
1 files changed, 45 insertions(+)

Resubmitting with following changes : ulong -> unsigned long, removed type-casting
in size comparison of > 1Gb

diff -uprN linux-feb13-new-p1/drivers/scsi/megaraid/megaraid_sas.c linux-feb13-new-p2/drivers/scsi/megaraid/megaraid_sas.c
--- linux-feb13-new-p1/drivers/scsi/megaraid/megaraid_sas.c 2007-02-13 07:18:39.000000000 -0800
+++ linux-feb13-new-p2/drivers/scsi/megaraid/megaraid_sas.c 2007-02-13 11:34:58.000000000 -0800
@@ -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>
@@ -1015,6 +1016,49 @@ static int megasas_reset_bus_host(struct
}

/**
+ * 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
* @cmd: AEN command completed by the ISR
@@ -1054,6 +1098,7 @@ static struct scsi_host_template megasas
.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,
};


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-02-15 03:03    [W:0.025 / U:2.716 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site