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Commit cf62a0a5 authored by Sumant Patro's avatar Sumant Patro Committed by James Bottomley
Browse files

[SCSI] megaraid_sas: add bios_param in scsi_host_template 



Signed-off-by: default avatarSumant Patro <sumant.patro@lsi.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent af37acfb

drivers/scsi/megaraid/megaraid_sas.c

+45 −0
Original line number Diff line number Diff line
@@ -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,

};