[PATCH v4 12/24] mpi3mr: add bios_param shost template hook

Kashyap Desai
2021-05-11T19:51:56Z

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Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>

Cc: sathya.prakash@broadcom.com
---
drivers/scsi/mpi3mr/mpi3mr_os.c | 41 +++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)

diff --git a/drivers/scsi/mpi3mr/mpi3mr_os.c b/drivers/scsi/mpi3mr/mpi3mr_os.c
index d7b6f9417aa8..d3ace6cdd3fd 100644
--- a/drivers/scsi/mpi3mr/mpi3mr_os.c
+++ b/drivers/scsi/mpi3mr/mpi3mr_os.c
@@ -2059,6 +2059,46 @@ 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
* @shost: SCSI host reference
@@ -2502,6 +2542,7 @@ 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,