From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sumant Patro Subject: [PATCH 2/6] scsi: megaraid_sas - added bios_param in scsi_host_template Date: Wed, 14 Feb 2007 12:41:55 -0800 Message-ID: <1171485715.4188.13.camel@dumbo> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from mail0.lsil.com ([147.145.40.20]:48446 "EHLO mail0.lsil.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932309AbXBOBv3 (ORCPT ); Wed, 14 Feb 2007 20:51:29 -0500 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: James.Bottomley@SteelEye.com, akpm@osdl.org Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, neela.kolli@lsi.com, bo.yang@lsi.com, sumant.patro@lsi.com Added bios_param in scsi_host_template to return disk geometry. Signed-off-by: Sumant Patro --- 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 #include #include +#include #include #include @@ -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, };