[PATCH mlx5-next 03/10] IB/core: Add interface to advise_mr for kernel users

[Leon Romanovsky <leon@kernel.org>]

From: Moni Shoua <monis@mellanox.com>

Allow ULPs to call advise_mr, so they can control ODP regions
in the same way as user space applications.

Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/core/verbs.c | 11 +++++++++++
 include/rdma/ib_verbs.h         |  3 +++
 2 files changed, 14 insertions(+)

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 23d9911f7365..3ebae3b65c28 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2023,6 +2023,17 @@ struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 }
 EXPORT_SYMBOL(ib_reg_user_mr);

+int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice,
+		 u32 flags, struct ib_sge *sg_list, u32 num_sge)
+{
+	if (!pd->device->ops.advise_mr)
+		return -EOPNOTSUPP;
+
+	return pd->device->ops.advise_mr(pd, advice, flags, sg_list, num_sge,
+					 NULL);
+}
+EXPORT_SYMBOL(ib_advise_mr);
+
 int ib_dereg_mr_user(struct ib_mr *mr, struct ib_udata *udata)
 {
 	struct ib_pd *pd = mr->pd;
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 1aeb92609279..1f779fad3a1e 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -4172,6 +4172,9 @@ static inline void ib_dma_free_coherent(struct ib_device *dev,
 struct ib_mr *ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 			     u64 virt_addr, int mr_access_flags);

+/* ib_advise_mr -  give an advice about an address range in a memory region */
+int ib_advise_mr(struct ib_pd *pd, enum ib_uverbs_advise_mr_advice advice,
+		 u32 flags, struct ib_sge *sg_list, u32 num_sge);
 /**
  * ib_dereg_mr_user - Deregisters a memory region and removes it from the
  *   HCA translation table.
--
2.20.1