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RDMA/hns: Response dmac to userspace

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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@hisilicon.com>
Link: https://lore.kernel.org/r/20231207114231.2872104-3-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Junxian Huang 2023-12-07 19:42:28 +08:00 committed by Leon Romanovsky
parent 95f6b40082
commit d3f4020a21
2 changed files with 12 additions and 0 deletions
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7
drivers/infiniband/hw/hns/hns_roce_ah.c
View File

@ -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]);

5
include/uapi/rdma/hns-abi.h
View File

@ -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 */