[PATCH rdma-next 3/6] RDMA/nldev: Return ODP type per MR

[Leon Romanovsky <leon@kernel.org>]

From: Erez Alfasi <ereza@mellanox.com>

Provide an ODP explicit/implicit type indicator
as part of 'rdma resource mr show' dump.

For example:
~$: rdma resource mr show
dev mlx5_0 mrn 1 rkey 0xa99a lkey 0xa99a mrlen 50000000
pdn 9 pid 7372 odp explicit comm ibv_rc_pingpong

For non-ODP MRs, we won't print "odp ..." at all.

Signed-off-by: Erez Alfasi <ereza@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/core/nldev.c  | 8 ++++++++
 include/uapi/rdma/rdma_netlink.h | 5 +++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index e287b71a1cfd..1562b9446c51 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -37,6 +37,8 @@
 #include <net/netlink.h>
 #include <rdma/rdma_cm.h>
 #include <rdma/rdma_netlink.h>
+#include <rdma/ib_umem.h>
+#include <rdma/ib_umem_odp.h>
 
 #include "core_priv.h"
 #include "cma_priv.h"
@@ -101,6 +103,7 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
 	[RDMA_NLDEV_ATTR_RES_MRLEN]		= { .type = NLA_U64 },
 	[RDMA_NLDEV_ATTR_RES_MRN]		= { .type = NLA_U32 },
 	[RDMA_NLDEV_ATTR_RES_MR_ENTRY]		= { .type = NLA_NESTED },
+	[RDMA_NLDEV_ATTR_RES_MR_ODP_TYPE]	= { .type = NLA_U8 },
 	[RDMA_NLDEV_ATTR_RES_PATH_MIG_STATE]	= { .type = NLA_U8 },
 	[RDMA_NLDEV_ATTR_RES_PD]		= { .type = NLA_NESTED },
 	[RDMA_NLDEV_ATTR_RES_PDN]		= { .type = NLA_U32 },
@@ -589,6 +592,11 @@ static int fill_res_mr_entry(struct sk_buff *msg, bool has_cap_net_admin,
 			goto err;
 	}
 
+	if (mr->umem->is_odp)
+		if (nla_put_u8(msg, RDMA_NLDEV_ATTR_RES_MR_ODP_TYPE,
+			       to_ib_umem_odp(mr->umem)->type))
+			goto err;
+
 	if (nla_put_u64_64bit(msg, RDMA_NLDEV_ATTR_RES_MRLEN, mr->length,
 			      RDMA_NLDEV_ATTR_PAD))
 		goto err;
diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h
index 8e277783fa96..765771a7caf7 100644
--- a/include/uapi/rdma/rdma_netlink.h
+++ b/include/uapi/rdma/rdma_netlink.h
@@ -525,6 +525,11 @@ enum rdma_nldev_attr {
 	 */
 	RDMA_NLDEV_ATTR_DEV_DIM,                /* u8 */
 
+	/*
+	 * MR ODP type, e.g. implicit/explicit.
+	 */
+	RDMA_NLDEV_ATTR_RES_MR_ODP_TYPE,	/* u8 */
+
 	/*
 	 * Always the end
 	 */
-- 
2.20.1