RDMA/hns: Support MR's restrack ops for hns driver

The MR restrack attributes come from the queue information maintained by
the driver.

For example:

$ rdma res show mr dev hns_0 mrn 6 -dd -jp
[ {
        "ifindex": 4,
        "ifname": "hns_0",
        "mrn": 6,
        "rkey": "300",
        "lkey": "300",
        "mrlen": 131072,
        "pdn": 8,
        "pid": 1524,
        "comm": "ib_send_bw"
    },
    "drv_pbl_hop_num": 2,
    "drv_ba_pg_shift": 14,
    "drv_buf_pg_shift": 12
}

Link: https://lore.kernel.org/r/20220822104455.2311053-7-liangwenpeng@huawei.com
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/hns/hns_roce_restrack.c b/drivers/infiniband/hw/hns/hns_roce_restrack.c
index 9bafc627864b..84f942e19743 100644
--- a/drivers/infiniband/hw/hns/hns_roce_restrack.c
+++ b/drivers/infiniband/hw/hns/hns_roce_restrack.c
@@ -168,3 +168,33 @@ int hns_roce_fill_res_qp_entry_raw(struct sk_buff *msg, struct ib_qp *ib_qp)
 
 	return ret;
 }
+
+int hns_roce_fill_res_mr_entry(struct sk_buff *msg, struct ib_mr *ib_mr)
+{
+	struct hns_roce_mr *hr_mr = to_hr_mr(ib_mr);
+	struct nlattr *table_attr;
+
+	table_attr = nla_nest_start(msg, RDMA_NLDEV_ATTR_DRIVER);
+	if (!table_attr)
+		return -EMSGSIZE;
+
+	if (rdma_nl_put_driver_u32_hex(msg, "pbl_hop_num", hr_mr->pbl_hop_num))
+		goto err;
+
+	if (rdma_nl_put_driver_u32_hex(msg, "ba_pg_shift",
+				       hr_mr->pbl_mtr.hem_cfg.ba_pg_shift))
+		goto err;
+
+	if (rdma_nl_put_driver_u32_hex(msg, "buf_pg_shift",
+				       hr_mr->pbl_mtr.hem_cfg.buf_pg_shift))
+		goto err;
+
+	nla_nest_end(msg, table_attr);
+
+	return 0;
+
+err:
+	nla_nest_cancel(msg, table_attr);
+
+	return -EMSGSIZE;
+}