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| author |   John Garry <john.garry@huawei.com> | 2016-09-06 23:36:12 +0800 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2016-09-14 12:54:17 -0400 |
| commit | 4fde02ad66dc9ceb0b55daca21ef33b43df30ded (patch) | |
| tree | 4c707c92f64c6c18bfaa4dd62c6e24f70fc0abbd /drivers/scsi/hisi_sas/hisi_sas.h | |
| parent | scsi: hisi_sas: save completion queue read pointer (diff) | |
| download | linux-dev-4fde02ad66dc9ceb0b55daca21ef33b43df30ded.tar.xz linux-dev-4fde02ad66dc9ceb0b55daca21ef33b43df30ded.zip | |
scsi: hisi_sas: save delivery queue write pointer
Optimise by saving an avoidable read in the get_free_slot function. The
delivery queue write pointer will only be updated by software, so don't
bother re-reading what was already written in the previous call to
start_delivery function.
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/hisi_sas/hisi_sas.h')
| -rw-r--r-- | drivers/scsi/hisi_sas/hisi_sas.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h index 9410335caf41..72c98522bd26 100644 --- a/drivers/scsi/hisi_sas/hisi_sas.h +++ b/drivers/scsi/hisi_sas/hisi_sas.h @@ -98,6 +98,12 @@ struct hisi_sas_cq { int id; }; +struct hisi_sas_dq { + struct hisi_hba *hisi_hba; + int wr_point; + int id; +}; + struct hisi_sas_device { enum sas_device_type dev_type; struct hisi_hba *hisi_hba; @@ -194,6 +200,7 @@ struct hisi_hba { struct Scsi_Host *shost; struct hisi_sas_cq cq[HISI_SAS_MAX_QUEUES]; + struct hisi_sas_dq dq[HISI_SAS_MAX_QUEUES]; struct hisi_sas_phy phy[HISI_SAS_MAX_PHYS]; struct hisi_sas_port port[HISI_SAS_MAX_PHYS]; |