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Jacob Moroni 6567f40a75 RDMA/irdma: Do not directly rely on IB_PD_UNSAFE_GLOBAL_RKEY ... [ Upstream commit 71d3bdae5e ] The HW disables bounds checking for MRs with a length of zero, so the driver will only allow a zero length MR if the "all_memory" flag is set, and this flag is only set if IB_PD_UNSAFE_GLOBAL_RKEY is set for the PD. This means that the "get_dma_mr" method will currently fail unless the IB_PD_UNSAFE_GLOBAL_RKEY flag is set. This has not been an issue because the "get_dma_mr" method is only ever invoked if the device does not support the local DMA key or if IB_PD_UNSAFE_GLOBAL_RKEY is set, and so far, all IRDMA HW supports the local DMA lkey. However, some new HW does not support the local DMA lkey, so the "get_dma_mr" method needs to work without IB_PD_UNSAFE_GLOBAL_RKEY being set. To support HW that does not allow the local DMA lkey, the logic has been changed to pass an explicit flag to indicate when a dma_mr is being created so that the zero length will be allowed. Also, the "all_memory" flag has been forced to false for normal MR allocation since these MRs are never supposed to provide global unsafe rkey semantics anyway; only the MR created with "get_dma_mr" should support this. Fixes: bb6d73d9ad ("RDMA/irdma: Prevent zero-length STAG registration") Signed-off-by: Jacob Moroni <jmoroni@google.com> Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com> Link: https://patch.msgid.link/20251125025350.180-7-tatyana.e.nikolova@intel.com Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2025-12-18 13:55:08 +01:00
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core	IB/sa: Fix sa_local_svc_timeout_ms read race	2025-10-15 12:00:13 +02:00
hw	RDMA/irdma: Do not directly rely on IB_PD_UNSAFE_GLOBAL_RKEY	2025-12-18 13:55:08 +01:00
sw	RDMA/rxe: Fix null deref on srq->rq.queue after resize failure	2025-12-18 13:54:49 +01:00
ulp	RDMA/rtrs: server: Fix error handling in get_or_create_srv	2025-12-18 13:54:55 +01:00
Kconfig	RDMA: Disable IB HW for UML	2022-12-04 15:22:03 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00