@@ -22,4 +22,5 @@ rdma_rxe-y := \
rxe_mcast.o \
rxe_wq.o \
rxe_net.o \
- rxe_hw_counters.o
+ rxe_hw_counters.o \
+ rxe_odp.o
new file mode 100644
@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/*
+ * Copyright (c) 2022 Fujitsu Ltd. All rights reserved.
+ */
+
+#include <rdma/ib_umem_odp.h>
+
+bool rxe_ib_invalidate_range(struct mmu_interval_notifier *mni,
+ const struct mmu_notifier_range *range,
+ unsigned long cur_seq)
+{
+ struct ib_umem_odp *umem_odp =
+ container_of(mni, struct ib_umem_odp, notifier);
+ unsigned long start;
+ unsigned long end;
+
+ if (!mmu_notifier_range_blockable(range))
+ return false;
+
+ mutex_lock(&umem_odp->umem_mutex);
+ mmu_interval_set_seq(mni, cur_seq);
+
+ start = max_t(u64, ib_umem_start(umem_odp), range->start);
+ end = min_t(u64, ib_umem_end(umem_odp), range->end);
+
+ ib_umem_odp_unmap_dma_pages(umem_odp, start, end);
+
+ mutex_unlock(&umem_odp->umem_mutex);
+ return true;
+}
+
+const struct mmu_interval_notifier_ops rxe_mn_ops = {
+ .invalidate = rxe_ib_invalidate_range,
+};
On page invalidation, an MMU notifier callback is invoked to unmap DMA addresses and update umem_odp->dma_list. The callback is registered when an ODP-enabled MR is created. Signed-off-by: Daisuke Matsuda <matsuda-daisuke@fujitsu.com> --- drivers/infiniband/sw/rxe/Makefile | 3 ++- drivers/infiniband/sw/rxe/rxe_odp.c | 34 +++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+), 1 deletion(-) create mode 100644 drivers/infiniband/sw/rxe/rxe_odp.c