[PATCH rdma-next 2/8] IB/uverbs: Add device memory capabilities reporting

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From: Ariel Levkovich <lariel@xxxxxxxxxxxx>

This change allows vendors to report device memory capability
max_dm_size - to user via uverbs command.

Signed-off-by: Ariel Levkovich <lariel@xxxxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
 drivers/infiniband/core/uverbs_cmd.c | 6 ++++++
 include/rdma/ib_verbs.h              | 1 +
 2 files changed, 7 insertions(+)

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index ccb92182bb4f..2b30e09395d8 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -4006,6 +4006,12 @@ int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
 	resp.cq_moderation_caps.max_cq_moderation_period =
 		attr.cq_caps.max_cq_moderation_period;
 	resp.response_length += sizeof(resp.cq_moderation_caps);
+
+	if (ucore->outlen < resp.response_length + sizeof(resp.max_dm_size))
+		goto end;
+
+	resp.max_dm_size = attr.max_dm_size;
+	resp.response_length += sizeof(resp.max_dm_size);
 end:
 	err = ib_copy_to_udata(ucore, &resp, resp.response_length);
 	return err;
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 977683cab45d..9c11fe701f68 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -369,6 +369,7 @@ struct ib_device_attr {
 	u32			raw_packet_caps; /* Use ib_raw_packet_caps enum */
 	struct ib_tm_caps	tm_caps;
 	struct ib_cq_caps       cq_caps;
+	u64			max_dm_size;
 };
 
 enum ib_mtu {
-- 
2.14.3

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