RDMA/hns: Support SRQ restrack ops for hns driver

The SRQ restrack attributes come from the context maintained by ROCEE.

Example:
$ rdma res show srq -jp -dd
[ {
        "ifindex": 0,
        "ifname": "hns_0",
        "srqn": 0,
        "type": "BASIC",
        "lqpn": [ "14-15","22-23" ],
        "pdn": 2,
        "pid": 1224,
        "comm": "ib_send_bw",{
            "drv_srqn": 0,
            "drv_wqe_cnt": 512,
            "drv_max_gs": 2,
            "drv_xrcdn": 0
        }
    } ]

$ rdma res show srq link hns_0 -jpr
[ {
        "ifindex": 0,
        "ifname": "hns_0",
        "data": [ 149,0,0,0,0,0,0,0,0,0,0,0,119,101,120,99,0,
		  46,62,31,0,0,0,0,3,0,0,1,0,58,62,31,0,0,0,0,
		  30,159,15,0,0,0,64,5,0,0,0,0,0,0,0,0,0,0,0,
		  9,0,0,0,0,0,0,0,0 ]
    } ]

Signed-off-by: wenglianfa <wenglianfa@huawei.com>
Link: https://lore.kernel.org/r/20230918131110.3987498-4-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -908,6 +908,7 @@ struct hns_roce_hw {
 	int (*query_cqc)(struct hns_roce_dev *hr_dev, u32 cqn, void *buffer);
 	int (*query_qpc)(struct hns_roce_dev *hr_dev, u32 qpn, void *buffer);
 	int (*query_mpt)(struct hns_roce_dev *hr_dev, u32 key, void *buffer);
+	int (*query_srqc)(struct hns_roce_dev *hr_dev, u32 srqn, void *buffer);
 	int (*query_hw_counter)(struct hns_roce_dev *hr_dev,
 				u64 *stats, u32 port, int *hw_counters);
 	const struct ib_device_ops *hns_roce_dev_ops;
@@ -1239,6 +1240,8 @@ 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);
 int hns_roce_fill_res_mr_entry_raw(struct sk_buff *msg, struct ib_mr *ib_mr);
+int hns_roce_fill_res_srq_entry(struct sk_buff *msg, struct ib_srq *ib_srq);
+int hns_roce_fill_res_srq_entry_raw(struct sk_buff *msg, struct ib_srq *ib_srq);
 struct hns_user_mmap_entry *
 hns_roce_user_mmap_entry_insert(struct ib_ucontext *ucontext, u64 address,
 				size_t length,

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -5272,6 +5272,30 @@ out:
 	return ret;
 }
 
+static int hns_roce_v2_query_srqc(struct hns_roce_dev *hr_dev, u32 srqn,
+				 void *buffer)
+{
+	struct hns_roce_srq_context *context;
+	struct hns_roce_cmd_mailbox *mailbox;
+	int ret;
+
+	mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
+	if (IS_ERR(mailbox))
+		return PTR_ERR(mailbox);
+
+	context = mailbox->buf;
+	ret = hns_roce_cmd_mbox(hr_dev, 0, mailbox->dma, HNS_ROCE_CMD_QUERY_SRQC,
+				srqn);
+	if (ret)
+		goto out;
+
+	memcpy(buffer, context, sizeof(*context));
+
+out:
+	hns_roce_free_cmd_mailbox(hr_dev, mailbox);
+	return ret;
+}
+
 static u8 get_qp_timeout_attr(struct hns_roce_dev *hr_dev,
 			      struct hns_roce_v2_qp_context *context)
 {
@@ -6632,6 +6656,7 @@ static const struct hns_roce_hw hns_roce_hw_v2 = {
 	.query_cqc = hns_roce_v2_query_cqc,
 	.query_qpc = hns_roce_v2_query_qpc,
 	.query_mpt = hns_roce_v2_query_mpt,
+	.query_srqc = hns_roce_v2_query_srqc,
 	.query_hw_counter = hns_roce_hw_v2_query_counter,
 	.hns_roce_dev_ops = &hns_roce_v2_dev_ops,
 	.hns_roce_dev_srq_ops = &hns_roce_v2_dev_srq_ops,

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -681,6 +681,8 @@ static const struct ib_device_ops hns_roce_dev_restrack_ops = {
 	.fill_res_qp_entry_raw = hns_roce_fill_res_qp_entry_raw,
 	.fill_res_mr_entry = hns_roce_fill_res_mr_entry,
 	.fill_res_mr_entry_raw = hns_roce_fill_res_mr_entry_raw,
+	.fill_res_srq_entry = hns_roce_fill_res_srq_entry,
+	.fill_res_srq_entry_raw = hns_roce_fill_res_srq_entry_raw,
 };
 
 static int hns_roce_register_device(struct hns_roce_dev *hr_dev)

drivers/infiniband/hw/hns/hns_roce_restrack.c

@@ -160,3 +160,52 @@ int hns_roce_fill_res_mr_entry_raw(struct sk_buff *msg, struct ib_mr *ib_mr)
 
 	return ret;
 }
+
+int hns_roce_fill_res_srq_entry(struct sk_buff *msg, struct ib_srq *ib_srq)
+{
+	struct hns_roce_srq *hr_srq = to_hr_srq(ib_srq);
+	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, "srqn", hr_srq->srqn))
+		goto err;
+
+	if (rdma_nl_put_driver_u32_hex(msg, "wqe_cnt", hr_srq->wqe_cnt))
+		goto err;
+
+	if (rdma_nl_put_driver_u32_hex(msg, "max_gs", hr_srq->max_gs))
+		goto err;
+
+	if (rdma_nl_put_driver_u32_hex(msg, "xrcdn", hr_srq->xrcdn))
+		goto err;
+
+	nla_nest_end(msg, table_attr);
+
+	return 0;
+
+err:
+	nla_nest_cancel(msg, table_attr);
+	return -EMSGSIZE;
+}
+
+int hns_roce_fill_res_srq_entry_raw(struct sk_buff *msg, struct ib_srq *ib_srq)
+{
+	struct hns_roce_dev *hr_dev = to_hr_dev(ib_srq->device);
+	struct hns_roce_srq *hr_srq = to_hr_srq(ib_srq);
+	struct hns_roce_srq_context context;
+	int ret;
+
+	if (!hr_dev->hw->query_srqc)
+		return -EINVAL;
+
+	ret = hr_dev->hw->query_srqc(hr_dev, hr_srq->srqn, &context);
+	if (ret)
+		return ret;
+
+	ret = nla_put(msg, RDMA_NLDEV_ATTR_RES_RAW, sizeof(context), &context);
+
+	return ret;
+}