[3/4] rdma_rxe: Increase DMA max_segment_size parameter
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Message ID 20191021021030.1037-4-bvanassche@acm.org
State Superseded
Headers show
Series
  • Fixes related to the DMA max_segment_size parameter
Related show

Commit Message

Bart Van Assche Oct. 21, 2019, 2:10 a.m. UTC
Increase the DMA max_segment_size parameter from 64 KB to UINT_MAX.

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/infiniband/sw/rxe/rxe_verbs.c | 3 +++
 drivers/infiniband/sw/rxe/rxe_verbs.h | 1 +
 2 files changed, 4 insertions(+)

Patch
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diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index fa47bdcc7f54..2ec085b53907 100644
--- 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 *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 = UINT_MAX };
 	dma_coerce_mask_and_coherent(&dev->dev,
 				     dma_get_required_mask(&dev->dev));
 
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.h b/drivers/infiniband/sw/rxe/rxe_verbs.h
index 5c4b2239129c..95834206c80c 100644
--- 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;