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scsi: storvsc: Add ability to change scsi queue depth

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Adding functionality to allow the SCSI queue depth to be changed by
utilizing the "scsi_change_queue_depth" function.

[mkp: checkpatch]

Signed-off-by: Branden Bonaby <brandonbonaby94@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Branden Bonaby
2019-06-14 19:48:22 -04:00
committed by Martin K. Petersen
parent 6ea3b189f7
commit adfbd028e1
1 changed files with 11 additions and 0 deletions
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11
drivers/scsi/storvsc_drv.c
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@@ -387,6 +387,7 @@ enum storvsc_request_type {
static int storvsc_ringbuffer_size = (128 * 1024); static int storvsc_ringbuffer_size = (128 * 1024);
static u32 max_outstanding_req_per_channel; static u32 max_outstanding_req_per_channel;
static int storvsc_change_queue_depth(struct scsi_device *sdev, int queue_depth);
static int storvsc_vcpus_per_sub_channel = 4; static int storvsc_vcpus_per_sub_channel = 4;
@@ -1711,6 +1712,7 @@ static struct scsi_host_template scsi_driver = {
.dma_boundary = PAGE_SIZE-1, .dma_boundary = PAGE_SIZE-1,
.no_write_same = 1, .no_write_same = 1,
.track_queue_depth = 1, .track_queue_depth = 1,
.change_queue_depth = storvsc_change_queue_depth,
}; };
enum { enum {
@@ -1917,6 +1919,15 @@ err_out0:
return ret; return ret;
} }
/* Change a scsi target's queue depth */
static int storvsc_change_queue_depth(struct scsi_device *sdev, int queue_depth)
{
if (queue_depth > scsi_driver.can_queue)
queue_depth = scsi_driver.can_queue;
return scsi_change_queue_depth(sdev, queue_depth);
}
static int storvsc_remove(struct hv_device *dev) static int storvsc_remove(struct hv_device *dev)
{ {
struct storvsc_device *stor_device = hv_get_drvdata(dev); struct storvsc_device *stor_device = hv_get_drvdata(dev);