diff options
| author | Chiara Meiohas <cmeiohas@nvidia.com> | 2025-03-06 13:51:27 +0200 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2025-03-09 13:13:02 -0400 |
| commit | cf7174e8982f8e07a04db23e549a3f9c9a80d3ca (patch) | |
| tree | cab0a44998112a5fe3bcac11c2da8abfb78f9d08 | |
| parent | 61e51682816d395307f78ae06d640089054c28ab (diff) | |
RDMA/mlx5: Create UCAP char devices for supported device capabilities
Create UCAP character devices when probing an IB device with supported
firmware capabilities.
If the RDMA_CTRL general object type is supported, check for specific
UCTX capabilities:
Create /dev/infiniband/mlx5_perm_ctrl_local for RDMA_UCAP_MLX5_CTRL_LOCAL
Create /dev/infiniband/mlx5_perm_ctrl_other_vhca for RDMA_UCAP_MLX5_CTRL_OTHER_VHCA
Signed-off-by: Chiara Meiohas <cmeiohas@nvidia.com>
Link: https://patch.msgid.link/30ed40e7a12a694cf4ee257459ed61b145b7837d.1741261611.git.leon@kernel.org
Reviewed-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
| -rw-r--r-- | drivers/infiniband/hw/mlx5/main.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 81849eb671a1..04b489a6a449 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -47,6 +47,7 @@ #include <rdma/uverbs_ioctl.h> #include <rdma/mlx5_user_ioctl_verbs.h> #include <rdma/mlx5_user_ioctl_cmds.h> +#include <rdma/ib_ucaps.h> #include "macsec.h" #include "data_direct.h" @@ -4201,8 +4202,47 @@ static int mlx5_ib_init_var_table(struct mlx5_ib_dev *dev) return (var_table->bitmap) ? 0 : -ENOMEM; } +static void mlx5_ib_cleanup_ucaps(struct mlx5_ib_dev *dev) +{ + if (MLX5_CAP_GEN(dev->mdev, uctx_cap) & MLX5_UCTX_CAP_RDMA_CTRL) + ib_remove_ucap(RDMA_UCAP_MLX5_CTRL_LOCAL); + + if (MLX5_CAP_GEN(dev->mdev, uctx_cap) & + MLX5_UCTX_CAP_RDMA_CTRL_OTHER_VHCA) + ib_remove_ucap(RDMA_UCAP_MLX5_CTRL_OTHER_VHCA); +} + +static int mlx5_ib_init_ucaps(struct mlx5_ib_dev *dev) +{ + int ret; + + if (MLX5_CAP_GEN(dev->mdev, uctx_cap) & MLX5_UCTX_CAP_RDMA_CTRL) { + ret = ib_create_ucap(RDMA_UCAP_MLX5_CTRL_LOCAL); + if (ret) + return ret; + } + + if (MLX5_CAP_GEN(dev->mdev, uctx_cap) & + MLX5_UCTX_CAP_RDMA_CTRL_OTHER_VHCA) { + ret = ib_create_ucap(RDMA_UCAP_MLX5_CTRL_OTHER_VHCA); + if (ret) + goto remove_local; + } + + return 0; + +remove_local: + if (MLX5_CAP_GEN(dev->mdev, uctx_cap) & MLX5_UCTX_CAP_RDMA_CTRL) + ib_remove_ucap(RDMA_UCAP_MLX5_CTRL_LOCAL); + return ret; +} + static void mlx5_ib_stage_caps_cleanup(struct mlx5_ib_dev *dev) { + if (MLX5_CAP_GEN_2_64(dev->mdev, general_obj_types_127_64) & + MLX5_HCA_CAP_2_GENERAL_OBJECT_TYPES_RDMA_CTRL) + mlx5_ib_cleanup_ucaps(dev); + bitmap_free(dev->var_table.bitmap); } @@ -4253,6 +4293,13 @@ static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev) return err; } + if (MLX5_CAP_GEN_2_64(dev->mdev, general_obj_types_127_64) & + MLX5_HCA_CAP_2_GENERAL_OBJECT_TYPES_RDMA_CTRL) { + err = mlx5_ib_init_ucaps(dev); + if (err) + return err; + } + dev->ib_dev.use_cq_dim = true; return 0; |