From: Ariel Levkovich <lariel@mellanox.com>
Date: Thu, 5 Apr 2018 18:53:23 +0300
Subject: IB/uverbs: Add device memory capabilities reporting
Patch-mainline: v4.17-rc1
Git-commit: 1d8eeb9f6a6e0d8ac43a54fd95126044bf8d6695
References: bsc#1103992 FATE#326009

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

Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/core/uverbs_cmd.c |    6 ++++++
 include/rdma/ib_verbs.h              |    1 +
 2 files changed, 7 insertions(+)

--- 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_
 	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;
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -372,6 +372,7 @@ 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 {