[PATCH 6/6] scsi: hisi_sas: Set max optimal DMA size for v3 hw

[John Garry]

For IOMMU strict mode, more than doubles throughput in some scenarios.

Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
---
 drivers/scsi/hisi_sas/hisi_sas_v3_hw.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
index 4580e081e489..2f77b418bbeb 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
@@ -4684,6 +4684,8 @@ hisi_sas_v3_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto err_out_regions;
 	}
 
+	dma_set_max_opt_size(dev, PAGE_SIZE * HISI_SAS_SGE_PAGE_CNT);
+
 	shost = hisi_sas_shost_alloc_pci(pdev);
 	if (!shost) {
 		rc = -ENOMEM;
-- 
2.26.2