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

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> On Apr 19, 2021, at 6:01 AM, Kashyap Desai <kashyap.desai@xxxxxxxxxxxx> wrote:
> 
> Signed-off-by: Kashyap Desai <kashyap.desai@xxxxxxxxxxxx>
> Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
> Reviewed-by: Tomas Henzl <thenzl@xxxxxxxxxx>
> 
> Cc: sathya.prakash@xxxxxxxxxxxx
> ---
> 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@xxxxxxxxxx>

--
Himanshu Madhani	 Oracle Linux Engineering





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