RDMA/rxe: Increase DMA max_segment_size parameter

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

Link: https://lore.kernel.org/r/20191025225830.257535-3-bvanassche@acm.orgSigned-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/sw/rxe/rxe_verbs.c

@@ -1175,6 +1175,9 @@ int rxe_register_device(struct rxe_dev *rxe, const char *ibdev_name)
 	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));
 

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;