From: Moni Shoua <monis@mellanox.com>
Date: Wed, 15 Jan 2020 14:43:33 +0200
Subject: IB/core: Add interface to advise_mr for kernel users
Patch-mainline: v5.6-rc1
Git-commit: 87d8069f6b028793254ddd0a66df1d7b6d79b450
References: jsc#SLE-8449

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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/core/verbs.c |   11 +++++++++++
 include/rdma/ib_verbs.h         |    3 +++
 2 files changed, 14 insertions(+)

--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2020,6 +2020,17 @@ struct ib_mr *ib_reg_user_mr(struct ib_p
 }
 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;
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -4161,6 +4161,9 @@ static inline void ib_dma_free_coherent(
 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.