[PATCH v4 12/24] mpi3mr: add bios_param shost template hook
From: Kashyap Desai <kashyap.desai@broadcom.com>
Date: 2021-05-11 19:51:56
Subsystem:
broadcom mpi3 storage controller driver, scsi subsystem, the rest · Maintainers:
Sathya Prakash Veerichetty, Kashyap Desai, Sumit Saxena, Sreekanth Reddy, "James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Tomas Henzl <redacted> Reviewed-by: Himanshu Madhani <redacted> 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,
--
2.18.1
Attachments
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