RDMA/mlx5: Add new IB rates support

Support 56, 25, 100, 200 and 50Gbps IB rates in mlx5 driver.

Link: https://lore.kernel.org/r/20200802081712.1993490-1-leon@kernel.org
Signed-off-by: Mark Zhang <markz@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index defd696..246cefd 100644 (file)
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -3088,20 +3088,44 @@ enum {
        MLX5_PATH_FLAG_COUNTER  = 1 << 2,
 };
 
+static int ib_to_mlx5_rate_map(u8 rate)
+{
+       switch (rate) {
+       case IB_RATE_PORT_CURRENT:
+               return 0;
+       case IB_RATE_56_GBPS:
+               return 1;
+       case IB_RATE_25_GBPS:
+               return 2;
+       case IB_RATE_100_GBPS:
+               return 3;
+       case IB_RATE_200_GBPS:
+               return 4;
+       case IB_RATE_50_GBPS:
+               return 5;
+       default:
+               return rate + MLX5_STAT_RATE_OFFSET;
+       };
+
+       return 0;
+}
+
 static int ib_rate_to_mlx5(struct mlx5_ib_dev *dev, u8 rate)
 {
+       u32 stat_rate_support;
+
        if (rate == IB_RATE_PORT_CURRENT)
                return 0;
 
        if (rate < IB_RATE_2_5_GBPS || rate > IB_RATE_600_GBPS)
                return -EINVAL;
 
+       stat_rate_support = MLX5_CAP_GEN(dev->mdev, stat_rate_support);
        while (rate != IB_RATE_PORT_CURRENT &&
-              !(1 << (rate + MLX5_STAT_RATE_OFFSET) &
-                MLX5_CAP_GEN(dev->mdev, stat_rate_support)))
+              !(1 << ib_to_mlx5_rate_map(rate) & stat_rate_support))
                --rate;
 
-       return rate ? rate + MLX5_STAT_RATE_OFFSET : rate;
+       return ib_to_mlx5_rate_map(rate);
 }
 
 static int modify_raw_packet_eth_prio(struct mlx5_core_dev *dev,