[PATCH 5.11 394/601] RDMA/mlx5: Fix mlx5 rates to IB rates map

Greg Kroah-Hartman
2021-05-12T17:41:43Z

From: Mark Zhang <markzhang@nvidia.com>

[ Upstream commit 6fe6e568639859db960c8fcef19a2ece1c2d7eae ]

Correct the map between mlx5 rates and corresponding ib rates, as they
don't always have a fixed offset between them.

Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
Link: https://lore.kernel.org/r/20210304124517.1100608-4-leon@kernel.org
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/hw/mlx5/qp.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index bab40ad527da..434d70ff7ee9 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -3054,6 +3054,19 @@ enum {
MLX5_PATH_FLAG_COUNTER = 1 << 2,
};

+static int mlx5_to_ib_rate_map(u8 rate)
+{
+ static const int rates[] = { IB_RATE_PORT_CURRENT, IB_RATE_56_GBPS,
+ IB_RATE_25_GBPS, IB_RATE_100_GBPS,
+ IB_RATE_200_GBPS, IB_RATE_50_GBPS,
+ IB_RATE_400_GBPS };
+
+ if (rate < ARRAY_SIZE(rates))
+ return rates[rate];
+
+ return rate - MLX5_STAT_RATE_OFFSET;
+}
+
static int ib_to_mlx5_rate_map(u8 rate)
{
switch (rate) {
@@ -4398,7 +4411,7 @@ static void to_rdma_ah_attr(struct mlx5_ib_dev *ibdev,
rdma_ah_set_path_bits(ah_attr, MLX5_GET(ads, path, mlid));

static_rate = MLX5_GET(ads, path, stat_rate);
- rdma_ah_set_static_rate(ah_attr, static_rate ? static_rate - 5 : 0);
+ rdma_ah_set_static_rate(ah_attr, mlx5_to_ib_rate_map(static_rate));
if (MLX5_GET(ads, path, grh) ||
ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) {
rdma_ah_set_grh(ah_attr, NULL, MLX5_GET(ads, path, flow_label),
--
2.30.2