From: Maher Sanalla <msanalla@nvidia.com>
Date: Sun, 24 May 2026 15:38:06 +0000 (+0300)
Subject: RDMA/mlx5: Report packet pacing capabilities when querying device
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1f307090e9575005ae3fc5cbb9d9520dcaf5086d;p=thirdparty%2Fkernel%2Fstable.git

RDMA/mlx5: Report packet pacing capabilities when querying device

When querying device, report packet pacing capabilities for UD and
UC QPs when device supports it.

Signed-off-by: Maher Sanalla <msanalla@nvidia.com>
Reviewed-by: Michael Guralnik <michaelgur@nvidia.com>
Signed-off-by: Edward Srouji <edwards@nvidia.com>
Link: https://patch.msgid.link/20260524-packet-pacing-v1-5-3d79439f8d08@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
---

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index a558ac5bb219..38b2481aaae1 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1214,20 +1214,29 @@ static int mlx5_ib_query_device(struct ib_device *ibdev,
 		}
 	}
 
-	if (offsetofend(typeof(resp), packet_pacing_caps) <= uhw_outlen &&
-	    raw_support) {
-		if (MLX5_CAP_QOS(mdev, packet_pacing) &&
-		    MLX5_CAP_GEN(mdev, qos)) {
-			resp.packet_pacing_caps.qp_rate_limit_max =
-				MLX5_CAP_QOS(mdev, packet_pacing_max_rate);
-			resp.packet_pacing_caps.qp_rate_limit_min =
-				MLX5_CAP_QOS(mdev, packet_pacing_min_rate);
-			resp.packet_pacing_caps.supported_qpts |=
-				1 << IB_QPT_RAW_PACKET;
-			if (MLX5_CAP_QOS(mdev, packet_pacing_burst_bound) &&
-			    MLX5_CAP_QOS(mdev, packet_pacing_typical_size))
-				resp.packet_pacing_caps.cap_flags |=
-					MLX5_IB_PP_SUPPORT_BURST;
+	if (offsetofend(typeof(resp), packet_pacing_caps) <= uhw_outlen) {
+		if (MLX5_CAP_GEN(mdev, qos)) {
+			if (MLX5_CAP_QOS(mdev, packet_pacing) && raw_support)
+				resp.packet_pacing_caps.supported_qpts |=
+					BIT(IB_QPT_RAW_PACKET);
+			if (MLX5_CAP_QOS(mdev, packet_pacing_req_ud))
+				resp.packet_pacing_caps.supported_qpts |=
+					BIT(IB_QPT_UD);
+			if (MLX5_CAP_QOS(mdev, packet_pacing_req_uc))
+				resp.packet_pacing_caps.supported_qpts |=
+					BIT(IB_QPT_UC);
+
+			if (resp.packet_pacing_caps.supported_qpts) {
+				resp.packet_pacing_caps.qp_rate_limit_max =
+					MLX5_CAP_QOS(mdev, packet_pacing_max_rate);
+				resp.packet_pacing_caps.qp_rate_limit_min =
+					MLX5_CAP_QOS(mdev, packet_pacing_min_rate);
+
+				if (MLX5_CAP_QOS(mdev, packet_pacing_burst_bound) &&
+				    MLX5_CAP_QOS(mdev, packet_pacing_typical_size))
+					resp.packet_pacing_caps.cap_flags |=
+						MLX5_IB_PP_SUPPORT_BURST;
+			}
 		}
 		resp.response_length += sizeof(resp.packet_pacing_caps);
 	}