From cdbe33d0f82d68ff74f05502a4c26e65ec7e90bb Mon Sep 17 00:00:00 2001 From: Eli Cohen Date: Tue, 14 Feb 2017 07:25:38 +0200 Subject: [PATCH] IB/mlx5: Fix configuration of port capabilities When the "ib_virt" cap is set, configuration of port capabilities need to be done through mlx5_core_modify_hca_vport_context. Since modify_hca_vport_context accepts mask and value, there is no need to read the port capabilities and calculate the new cap values so we avoid the mutex when ib_virt is set. Signed-off-by: Eli Cohen Reviewed-by: Matan Barak Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- drivers/infiniband/hw/mlx5/main.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 8fd35eb..4a043cf 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -995,6 +995,31 @@ static int mlx5_ib_modify_device(struct ib_device *ibdev, int mask, return err; } +static int set_port_caps_atomic(struct mlx5_ib_dev *dev, u8 port_num, u32 mask, + u32 value) +{ + struct mlx5_hca_vport_context ctx = {}; + int err; + + err = mlx5_query_hca_vport_context(dev->mdev, 0, + port_num, 0, &ctx); + if (err) + return err; + + if (~ctx.cap_mask1_perm & mask) { + mlx5_ib_warn(dev, "trying to change bitmask 0x%X but change supported 0x%X\n", + mask, ctx.cap_mask1_perm); + return -EINVAL; + } + + ctx.cap_mask1 = value; + ctx.cap_mask1_perm = mask; + err = mlx5_core_modify_hca_vport_context(dev->mdev, 0, + port_num, 0, &ctx); + + return err; +} + static int mlx5_ib_modify_port(struct ib_device *ibdev, u8 port, int mask, struct ib_port_modify *props) { @@ -1002,6 +1027,16 @@ static int mlx5_ib_modify_port(struct ib_device *ibdev, u8 port, int mask, struct ib_port_attr attr; u32 tmp; int err; + u32 change_mask; + u32 value; + bool is_ib = (mlx5_ib_port_link_layer(ibdev, port) == + IB_LINK_LAYER_INFINIBAND); + + if (MLX5_CAP_GEN(dev->mdev, ib_virt) && is_ib) { + change_mask = props->clr_port_cap_mask | props->set_port_cap_mask; + value = ~props->clr_port_cap_mask | props->set_port_cap_mask; + return set_port_caps_atomic(dev, port, change_mask, value); + } mutex_lock(&dev->cap_mask_mutex); -- 2.7.4