[PATCH v2 for-next 6/7] RDMA/hns: Support MR's restrack ops for hns driver

[Wenpeng Liang <liangwenpeng@xxxxxxxxxx>]

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
}

Signed-off-by: Wenpeng Liang <liangwenpeng@xxxxxxxxxx>
---
 drivers/infiniband/hw/hns/hns_roce_device.h   |  1 +
 drivers/infiniband/hw/hns/hns_roce_main.c     |  1 +
 drivers/infiniband/hw/hns/hns_roce_restrack.c | 30 +++++++++++++++++++
 3 files changed, 32 insertions(+)

diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index e0395870b819..30a67bc70f1a 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -1228,6 +1228,7 @@ int hns_roce_fill_res_cq_entry(struct sk_buff *msg, struct ib_cq *ib_cq);
 int hns_roce_fill_res_cq_entry_raw(struct sk_buff *msg, struct ib_cq *ib_cq);
 int hns_roce_fill_res_qp_entry(struct sk_buff *msg, struct ib_qp *ib_qp);
 int hns_roce_fill_res_qp_entry_raw(struct sk_buff *msg, struct ib_qp *ib_qp);
+int hns_roce_fill_res_mr_entry(struct sk_buff *msg, struct ib_mr *ib_mr);
 struct hns_user_mmap_entry *
 hns_roce_user_mmap_entry_insert(struct ib_ucontext *ucontext, u64 address,
 				size_t length,
diff --git a/drivers/infiniband/hw/hns/hns_roce_main.c b/drivers/infiniband/hw/hns/hns_roce_main.c
index 17bc73c108f2..ff4386b5c064 100644
--- a/drivers/infiniband/hw/hns/hns_roce_main.c
+++ b/drivers/infiniband/hw/hns/hns_roce_main.c
@@ -570,6 +570,7 @@ static const struct ib_device_ops hns_roce_dev_restrack_ops = {
 	.fill_res_cq_entry_raw = hns_roce_fill_res_cq_entry_raw,
 	.fill_res_qp_entry = hns_roce_fill_res_qp_entry,
 	.fill_res_qp_entry_raw = hns_roce_fill_res_qp_entry_raw,
+	.fill_res_mr_entry = hns_roce_fill_res_mr_entry,
 };
 
 static int hns_roce_register_device(struct hns_roce_dev *hr_dev)
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;
+}
-- 
2.30.0