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[SCSI] megaraid_sas: add bios_param in scsi_host_template 

Signed-off-by: Sumant Patro <sumant.patro@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Sumant Patro 2007-02-14 12:41:55 -08:00 committed by James Bottomley
parent af37acfb63
commit cf62a0a543
1 changed files with 45 additions and 0 deletions
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45
drivers/scsi/megaraid/megaraid_sas.c
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@ -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,
};