RDMA/mlx5: Remove pcie_relaxed_ordering_enabled() check for RO write

pcie_relaxed_ordering_enabled() check was added to avoid a syndrome when
creating a MKey with relaxed ordering (RO) enabled when the driver's
relaxed_ordering_{read,write} HCA capabilities are out of sync with FW.

While this can happen with relaxed_ordering_read, it can't happen with
relaxed_ordering_write as it's set if the device supports RO write,
regardless of RO in PCI config space, and thus can't change during
runtime.

Therefore, drop the pcie_relaxed_ordering_enabled() check for
relaxed_ordering_write while keeping it for relaxed_ordering_read.
Doing so will also allow the usage of RO write in VFs and VMs (where RO
in PCI config space is not reported/emulated properly).

Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Shay Drory <shayd@nvidia.com>
Link: https://lore.kernel.org/r/7e8f55e31572c1702d69cae015a395d3a824a38a.1681131553.git.leon@kernel.org
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 67356f5..bd0a818 100644 (file)
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -67,11 +67,11 @@ static void set_mkc_access_pd_addr_fields(void *mkc, int acc, u64 start_addr,
        MLX5_SET(mkc, mkc, lw, !!(acc & IB_ACCESS_LOCAL_WRITE));
        MLX5_SET(mkc, mkc, lr, 1);
 
-       if ((acc & IB_ACCESS_RELAXED_ORDERING) &&
-           pcie_relaxed_ordering_enabled(dev->mdev->pdev)) {
+       if (acc & IB_ACCESS_RELAXED_ORDERING) {
                if (MLX5_CAP_GEN(dev->mdev, relaxed_ordering_write))
                        MLX5_SET(mkc, mkc, relaxed_ordering_write, 1);
-               if (MLX5_CAP_GEN(dev->mdev, relaxed_ordering_read))
+               if (MLX5_CAP_GEN(dev->mdev, relaxed_ordering_read) &&
+                   pcie_relaxed_ordering_enabled(dev->mdev->pdev))
                        MLX5_SET(mkc, mkc, relaxed_ordering_read, 1);
        }
 

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/params.c b/drivers/net/ethernet/mellanox/mlx5/core/en/params.c
index a21bd11..d840a59 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/params.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/params.c
@@ -867,8 +867,7 @@ static void mlx5e_build_rx_cq_param(struct mlx5_core_dev *mdev,
 static u8 rq_end_pad_mode(struct mlx5_core_dev *mdev, struct mlx5e_params *params)
 {
        bool lro_en = params->packet_merge.type == MLX5E_PACKET_MERGE_LRO;
-       bool ro = pcie_relaxed_ordering_enabled(mdev->pdev) &&
-               MLX5_CAP_GEN(mdev, relaxed_ordering_write);
+       bool ro = MLX5_CAP_GEN(mdev, relaxed_ordering_write);
 
        return ro && lro_en ?
                MLX5_WQ_END_PAD_MODE_NONE : MLX5_WQ_END_PAD_MODE_ALIGN;

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_common.c b/drivers/net/ethernet/mellanox/mlx5/core/en_common.c
index 4c9a321..993af4c 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_common.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_common.c
@@ -44,7 +44,7 @@ void mlx5e_mkey_set_relaxed_ordering(struct mlx5_core_dev *mdev, void *mkc)
        bool ro_read = MLX5_CAP_GEN(mdev, relaxed_ordering_read);
 
        MLX5_SET(mkc, mkc, relaxed_ordering_read, ro_pci_enable && ro_read);
-       MLX5_SET(mkc, mkc, relaxed_ordering_write, ro_pci_enable && ro_write);
+       MLX5_SET(mkc, mkc, relaxed_ordering_write, ro_write);
 }
 
 int mlx5e_create_mkey(struct mlx5_core_dev *mdev, u32 pdn, u32 *mkey)