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path: root/drivers/infiniband/hw/mlx5/odp.c
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Diffstat (limited to 'drivers/infiniband/hw/mlx5/odp.c')
-rw-r--r--drivers/infiniband/hw/mlx5/odp.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c
index 4743ef78afe0..d01fdec05b89 100644
--- a/drivers/infiniband/hw/mlx5/odp.c
+++ b/drivers/infiniband/hw/mlx5/odp.c
@@ -665,6 +665,7 @@ void mlx5_ib_fence_odp_mr(struct mlx5_ib_mr *mr)
}
#define MLX5_PF_FLAGS_DOWNGRADE BIT(1)
+#define MLX5_PF_FLAGS_SNAPSHOT BIT(2)
static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp,
u64 user_va, size_t bcnt, u32 *bytes_mapped,
u32 flags)
@@ -673,6 +674,7 @@ static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp,
bool downgrade = flags & MLX5_PF_FLAGS_DOWNGRADE;
u64 access_mask;
u64 start_idx;
+ bool fault = !(flags & MLX5_PF_FLAGS_SNAPSHOT);
page_shift = odp->page_shift;
start_idx = (user_va - ib_umem_start(odp)) >> page_shift;
@@ -681,7 +683,7 @@ static int pagefault_real_mr(struct mlx5_ib_mr *mr, struct ib_umem_odp *odp,
if (odp->umem.writable && !downgrade)
access_mask |= ODP_WRITE_ALLOWED_BIT;
- np = ib_umem_odp_map_dma_and_lock(odp, user_va, bcnt, access_mask, true);
+ np = ib_umem_odp_map_dma_and_lock(odp, user_va, bcnt, access_mask, fault);
if (np < 0)
return np;
@@ -1851,6 +1853,9 @@ int mlx5_ib_advise_mr_prefetch(struct ib_pd *pd,
if (advice == IB_UVERBS_ADVISE_MR_ADVICE_PREFETCH)
pf_flags |= MLX5_PF_FLAGS_DOWNGRADE;
+ if (advice == IB_UVERBS_ADVISE_MR_ADVICE_PREFETCH_NO_FAULT)
+ pf_flags |= MLX5_PF_FLAGS_SNAPSHOT;
+
if (flags & IB_UVERBS_ADVISE_MR_FLAG_FLUSH)
return mlx5_ib_prefetch_sg_list(pd, advice, pf_flags, sg_list,
num_sge);