While creating AH, dmac is already resolved in kernel. Response dmac
to userspace so that userspace doesn't need to resolve dmac repeatedly.
Signed-off-by: Junxian Huang <huangjunxian6@xxxxxxxxxxxxx>
---
drivers/infiniband/hw/hns/hns_roce_ah.c | 7 +++++++
include/uapi/rdma/hns-abi.h | 5 +++++
2 files changed, 12 insertions(+)
diff --git a/drivers/infiniband/hw/hns/hns_roce_ah.c b/drivers/infiniband/hw/hns/hns_roce_ah.c
index fbf046982374..b4209b6aed8d 100644
--- a/drivers/infiniband/hw/hns/hns_roce_ah.c
+++ b/drivers/infiniband/hw/hns/hns_roce_ah.c
@@ -57,6 +57,7 @@ int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
struct rdma_ah_attr *ah_attr = init_attr->ah_attr;
const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr);
struct hns_roce_dev *hr_dev = to_hr_dev(ibah->device);
+ struct hns_roce_ib_create_ah_resp resp = {};
struct hns_roce_ah *ah = to_hr_ah(ibah);
int ret = 0;
u32 max_sl;
@@ -97,6 +98,12 @@ int hns_roce_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr,
ah->av.vlan_en = ah->av.vlan_id < VLAN_N_VID;
}
+ if (udata) {
+ memcpy(resp.dmac, ah_attr->roce.dmac, ETH_ALEN);
+ ret = ib_copy_to_udata(udata, &resp,
+ min(udata->outlen, sizeof(resp)));
+ }
+
err_out:
if (ret)
atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_AH_CREATE_ERR_CNT]);
diff --git a/include/uapi/rdma/hns-abi.h b/include/uapi/rdma/hns-abi.h
index ce0f37f83416..c996e151081e 100644
--- a/include/uapi/rdma/hns-abi.h
+++ b/include/uapi/rdma/hns-abi.h
@@ -125,4 +125,9 @@ struct hns_roce_ib_alloc_pd_resp {
__u32 pdn;
};
+struct hns_roce_ib_create_ah_resp {
+ __u8 dmac[6];
+ __u8 reserved[2];
+};
+
#endif /* HNS_ABI_USER_H */
--
2.30.0
