From: Bart Van Assche <bvanassche@acm.org>
Date: Fri, 25 Oct 2019 15:58:29 -0700
Subject: RDMA/siw: Increase DMA max_segment_size parameter
Patch-mainline: v5.5-rc1
Git-commit: a401fb819cd6586c2c983dc199be4a9b44c30661
References: jsc#SLE-8381

Increase the DMA max_segment_size parameter from 64 KB to 2 GB.

Link: https://lore.kernel.org/r/20191025225830.257535-4-bvanassche@acm.org
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/sw/siw/siw.h      |    1 +
 drivers/infiniband/sw/siw/siw_main.c |    3 +++
 2 files changed, 4 insertions(+)

--- a/drivers/infiniband/sw/siw/siw.h
+++ b/drivers/infiniband/sw/siw/siw.h
@@ -70,6 +70,7 @@ struct siw_pd {
 
 struct siw_device {
 	struct ib_device base_dev;
+	struct device_dma_parameters dma_parms;
 	struct net_device *netdev;
 	struct siw_dev_cap attrs;
 
--- a/drivers/infiniband/sw/siw/siw_main.c
+++ b/drivers/infiniband/sw/siw/siw_main.c
@@ -382,6 +382,9 @@ static struct siw_device *siw_device_cre
 	base_dev->phys_port_cnt = 1;
 	base_dev->dev.parent = parent;
 	base_dev->dev.dma_ops = &dma_virt_ops;
+	base_dev->dev.dma_parms = &sdev->dma_parms;
+	sdev->dma_parms = (struct device_dma_parameters)
+		{ .max_segment_size = SZ_2G };
 	base_dev->num_comp_vectors = num_possible_cpus();
 
 	ib_set_device_ops(base_dev, &siw_device_ops);