diff mbox series

[v3,12/24] mpi3mr: add bios_param shost template hook

Message ID 20210419110156.1786882-13-kashyap.desai@broadcom.com
State Superseded
Headers show
Series Introducing mpi3mr driver | expand

Commit Message

Kashyap Desai April 19, 2021, 11:01 a.m. UTC
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>

Cc: sathya.prakash@broadcom.com
---
 drivers/scsi/mpi3mr/mpi3mr_os.c | 40 +++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

Comments

Himanshu Madhani April 22, 2021, 2:31 a.m. UTC | #1
> On Apr 19, 2021, at 6:01 AM, Kashyap Desai <kashyap.desai@broadcom.com> wrote:

> 

> Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>

> Reviewed-by: Hannes Reinecke <hare@suse.de>

> Reviewed-by: Tomas Henzl <thenzl@redhat.com>

> 

> Cc: sathya.prakash@broadcom.com

> ---

> drivers/scsi/mpi3mr/mpi3mr_os.c | 40 +++++++++++++++++++++++++++++++++

> 1 file changed, 40 insertions(+)

> 

> diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c

> index 39928e2997ba..946a62610b55 100644

> --- a/drivers/scsi/mpi3mr/mpi3mr_os.c

> +++ b/drivers/scsi/mpi3mr/mpi3mr_os.c

> @@ -2075,6 +2075,45 @@ static int mpi3mr_build_sg_scmd(struct mpi3mr_ioc *mrioc,

> 	return ret;

> }

> 

> +/**

> + * mpi3mr_bios_param - BIOS param callback

> + * @sdev: SCSI device reference

> + * @bdev: Block device reference

> + * @capacity: Capacity in logical sectors

> + * @params: Parameter array

> + *

> + * Just the parameters with heads/secots/cylinders.

> + *

> + * Return: 0 always

> + */

> +static int mpi3mr_bios_param(struct scsi_device *sdev,

> +	struct block_device *bdev, sector_t capacity, int params[])

> +{

> +	int heads;

> +	int sectors;

> +	sector_t cylinders;

> +	ulong dummy;

> +

> +	heads = 64;

> +	sectors = 32;

> +

> +	dummy = heads * sectors;

> +	cylinders = capacity;

> +	sector_div(cylinders, dummy);

> +

> +	if ((ulong)capacity >= 0x200000) {

> +		heads = 255;

> +		sectors = 63;

> +		dummy = heads * sectors;

> +		cylinders = capacity;

> +		sector_div(cylinders, dummy);

> +	}

> +

> +	params[0] = heads;

> +	params[1] = sectors;

> +	params[2] = cylinders;

> +	return 0;

> +}

> 

> /**

>  * mpi3mr_map_queues - Map queues callback handler

> @@ -2508,6 +2547,7 @@ static struct scsi_host_template mpi3mr_driver_template = {

> 	.slave_destroy			= mpi3mr_slave_destroy,

> 	.scan_finished			= mpi3mr_scan_finished,

> 	.scan_start			= mpi3mr_scan_start,

> +	.bios_param			= mpi3mr_bios_param,

> 	.map_queues			= mpi3mr_map_queues,

> 	.no_write_same			= 1,

> 	.can_queue			= 1,

> -- 

> 2.18.1

> 


Looks Good

Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>


--
Himanshu Madhani	 Oracle Linux Engineering
diff mbox series

Patch

diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
index 39928e2997ba..946a62610b55 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_os.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
@@ -2075,6 +2075,45 @@  static int mpi3mr_build_sg_scmd(struct mpi3mr_ioc *mrioc,
 	return ret;
 }
 
+/**
+ * mpi3mr_bios_param - BIOS param callback
+ * @sdev: SCSI device reference
+ * @bdev: Block device reference
+ * @capacity: Capacity in logical sectors
+ * @params: Parameter array
+ *
+ * Just the parameters with heads/secots/cylinders.
+ *
+ * Return: 0 always
+ */
+static int mpi3mr_bios_param(struct scsi_device *sdev,
+	struct block_device *bdev, sector_t capacity, int params[])
+{
+	int heads;
+	int sectors;
+	sector_t cylinders;
+	ulong dummy;
+
+	heads = 64;
+	sectors = 32;
+
+	dummy = heads * sectors;
+	cylinders = capacity;
+	sector_div(cylinders, dummy);
+
+	if ((ulong)capacity >= 0x200000) {
+		heads = 255;
+		sectors = 63;
+		dummy = heads * sectors;
+		cylinders = capacity;
+		sector_div(cylinders, dummy);
+	}
+
+	params[0] = heads;
+	params[1] = sectors;
+	params[2] = cylinders;
+	return 0;
+}
 
 /**
  * mpi3mr_map_queues - Map queues callback handler
@@ -2508,6 +2547,7 @@  static struct scsi_host_template mpi3mr_driver_template = {
 	.slave_destroy			= mpi3mr_slave_destroy,
 	.scan_finished			= mpi3mr_scan_finished,
 	.scan_start			= mpi3mr_scan_start,
+	.bios_param			= mpi3mr_bios_param,
 	.map_queues			= mpi3mr_map_queues,
 	.no_write_same			= 1,
 	.can_queue			= 1,