Add support for hns DSCP

Support DSCP for hns RoCE.

Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>

0011-Update-kernel-headers.patch

@@ -0,0 +1,38 @@
+From 12d2a17d404e3d5ba76863f64307ea52a7d15d15 Mon Sep 17 00:00:00 2001
+From: Yixing Liu <liuyixing1@huawei.com>
+Date: Sat, 29 Oct 2022 10:44:17 +0800
+Subject: [PATCH 11/12] Update kernel headers
+
+To commit ?? ("RDMA/hns: Support DSCP of userspace").
+
+Signed-off-by: Yixing Liu <liuyixing1@huawei.com>
+---
+ kernel-headers/rdma/hns-abi.h | 12 ++++++++++++
+ 1 file changed, 12 insertions(+)
+
+diff --git a/kernel-headers/rdma/hns-abi.h b/kernel-headers/rdma/hns-abi.h
+index 41738b8..542be5e 100644
+--- a/kernel-headers/rdma/hns-abi.h
++++ b/kernel-headers/rdma/hns-abi.h
+@@ -85,6 +85,18 @@ struct hns_roce_ib_create_qp_resp {
+ 	__aligned_u64 dwqe_mmap_key;
+ };
+ 
++struct hns_roce_ib_create_ah_resp {
++	__u8    priority;
++	__u8    tc_mode;
++	__u8    reserved[6];
++};
++
++struct hns_roce_ib_modify_qp_resp {
++	__u8	tc_mode;
++	__u8	priority;
++	__u8	reserved[6];
++};
++
+ enum {
+ 	HNS_ROCE_EXSGE_FLAGS = 1 << 0,
+ 	HNS_ROCE_RQ_INLINE_FLAGS = 1 << 1,
+-- 
+2.30.0
+

0012-libhns-Support-DSCP.patch

@@ -0,0 +1,94 @@
+From 288a89df406d8c77b3e3d6a8ca375ef18b676769 Mon Sep 17 00:00:00 2001
+From: Yixing Liu <liuyixing1@huawei.com>
+Date: Tue, 27 Sep 2022 19:06:00 +0800
+Subject: [PATCH 12/12] libhns: Support DSCP
+
+This patch adds user mode DSCP function through
+the mapping of dscp-tc configured in kernel mode.
+
+Signed-off-by: Yixing Liu <liuyixing1@huawei.com>
+---
+ providers/hns/hns_roce_u.h       |  7 +++++++
+ providers/hns/hns_roce_u_hw_v2.c | 11 ++++++++++-
+ providers/hns/hns_roce_u_verbs.c |  3 +++
+ 3 files changed, 20 insertions(+), 1 deletion(-)
+
+diff --git a/providers/hns/hns_roce_u.h b/providers/hns/hns_roce_u.h
+index 6b64cd0..8c1cb1e 100644
+--- a/providers/hns/hns_roce_u.h
++++ b/providers/hns/hns_roce_u.h
+@@ -175,6 +175,11 @@ enum hns_roce_db_type {
+ 	HNS_ROCE_DB_TYPE_NUM
+ };
+ 
++enum hns_roce_tc_map_mode {
++	HNS_ROCE_TC_MAP_MODE_PRIO,
++	HNS_ROCE_TC_MAP_MODE_DSCP,
++};
++
+ struct hns_roce_db_page {
+ 	struct hns_roce_db_page	*prev, *next;
+ 	struct hns_roce_buf	buf;
+@@ -315,6 +320,8 @@ struct hns_roce_qp {
+ 	unsigned int			next_sge;
+ 	int				port_num;
+ 	uint8_t				sl;
++	uint8_t				tc_mode;
++	uint8_t				priority;
+ 	unsigned int			qkey;
+ 	enum ibv_mtu			path_mtu;
+ 
+diff --git a/providers/hns/hns_roce_u_hw_v2.c b/providers/hns/hns_roce_u_hw_v2.c
+index a30d461..c90a312 100644
+--- a/providers/hns/hns_roce_u_hw_v2.c
++++ b/providers/hns/hns_roce_u_hw_v2.c
+@@ -1545,6 +1545,7 @@ static int hns_roce_u_v2_modify_qp(struct ibv_qp *qp, struct ibv_qp_attr *attr,
+ {
+ 	int ret;
+ 	struct ibv_modify_qp cmd;
++	struct hns_roce_modify_qp_ex_resp resp_ex = {};
+ 	struct hns_roce_qp *hr_qp = to_hr_qp(qp);
+ 	bool flag = false; /* modify qp to error */
+ 
+@@ -1564,8 +1565,13 @@ static int hns_roce_u_v2_modify_qp(struct ibv_qp *qp, struct ibv_qp_attr *attr,
+ 	if (ret)
+ 		return ret;
+ 
+-	if (attr_mask & IBV_QP_STATE)
++	if (attr_mask & IBV_QP_STATE) {
+ 		qp->state = attr->qp_state;
++		if (attr->qp_state == IBV_QPS_RTR) {
++			hr_qp->tc_mode = resp_ex.drv_payload.tc_mode;
++			hr_qp->priority = resp_ex.drv_payload.priority;
++		}
++	}
+ 
+ 	if ((attr_mask & IBV_QP_STATE) && attr->qp_state == IBV_QPS_RESET) {
+ 		if (qp->recv_cq)
+@@ -1579,6 +1585,9 @@ static int hns_roce_u_v2_modify_qp(struct ibv_qp *qp, struct ibv_qp_attr *attr,
+ 		hns_roce_init_qp_indices(to_hr_qp(qp));
+ 	}
+ 
++	if (hr_qp->tc_mode == HNS_ROCE_TC_MAP_MODE_DSCP)
++		hr_qp->sl = hr_qp->priority;
++
+ 	record_qp_attr(qp, attr, attr_mask);
+ 
+ 	return ret;
+diff --git a/providers/hns/hns_roce_u_verbs.c b/providers/hns/hns_roce_u_verbs.c
+index cff9d1d..a21c837 100644
+--- a/providers/hns/hns_roce_u_verbs.c
++++ b/providers/hns/hns_roce_u_verbs.c
+@@ -1483,6 +1483,9 @@ struct ibv_ah *hns_roce_u_create_ah(struct ibv_pd *pd, struct ibv_ah_attr *attr)
+ 	if (ibv_resolve_eth_l2_from_gid(pd->context, attr, ah->av.mac, NULL))
+ 		goto err;
+ 
++	if (resp.tc_mode == HNS_ROCE_TC_MAP_MODE_DSCP)
++		ah->av.sl = resp.priority;
++
+ 	ah->av.udp_sport = get_ah_udp_sport(attr);
+ 
+ 	return &ah->ibv_ah;
+-- 
+2.30.0
+

rdma-core.spec

@@ -1,6 +1,6 @@
 Name:           rdma-core
 Version:        41.0
-Release:        2
+Release:        3
 Summary:        RDMA core userspace libraries and daemons
 License:        GPLv2 or BSD
 Url:            https://github.com/linux-rdma/rdma-core
@@ -260,6 +260,12 @@ fi
 %{_mandir}/*
 
 %changelog
+* Sat Oct 29 2022 tangchengchang <tangchengchang@huawei.com> - 41.0-3
+- Type: requirement
+- ID: NA
+- SUG: NA
+- DESC: Support rq inline and cqe inline
+
 * Sat Oct 08 2022 luoyouming <luoyouming@huawei.com> - 41.0-2
 - Type: requirement
 - ID: NA