From: Bart Van Assche <bvanassche@acm.org>
Date: Fri, 25 Oct 2019 15:58:28 -0700
Subject: RDMA/rxe: Increase DMA max_segment_size parameter
Patch-mainline: v5.5-rc1
Git-commit: 97458fd510917f142c417245fa5701a892ce69d7
References: jsc#SLE-8449
Increase the DMA max_segment_size parameter from 64 KB to 2 GB.
Link: https://lore.kernel.org/r/20191025225830.257535-3-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/rxe/rxe_verbs.c | 3 +++
drivers/infiniband/sw/rxe/rxe_verbs.h | 1 +
2 files changed, 4 insertions(+)
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -1175,6 +1175,9 @@ int rxe_register_device(struct rxe_dev *
addrconf_addr_eui48((unsigned char *)&dev->node_guid,
rxe->ndev->dev_addr);
dev->dev.dma_ops = &dma_virt_ops;
+ dev->dev.dma_parms = &rxe->dma_parms;
+ rxe->dma_parms = (struct device_dma_parameters)
+ { .max_segment_size = SZ_2G };
dma_coerce_mask_and_coherent(&dev->dev,
dma_get_required_mask(&dev->dev));
--- a/drivers/infiniband/sw/rxe/rxe_verbs.h
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.h
@@ -384,6 +384,7 @@ struct rxe_port {
struct rxe_dev {
struct ib_device ib_dev;
struct ib_device_attr attr;
+ struct device_dma_parameters dma_parms;
int max_ucontext;
int max_inline_data;
struct mutex usdev_lock;