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RDMA/mlx5: Create UCAP char devices for supported device capabilities

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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>
This commit is contained in:
Chiara Meiohas 2025-03-06 13:51:27 +02:00 committed by Leon Romanovsky
parent 61e5168281
commit cf7174e898
1 changed files with 47 additions and 0 deletions
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47
drivers/infiniband/hw/mlx5/main.c
View File

@ -47,6 +47,7 @@
#include <rdma/uverbs_ioctl.h> #include <rdma/uverbs_ioctl.h>
#include <rdma/mlx5_user_ioctl_verbs.h> #include <rdma/mlx5_user_ioctl_verbs.h>
#include <rdma/mlx5_user_ioctl_cmds.h> #include <rdma/mlx5_user_ioctl_cmds.h>
#include <rdma/ib_ucaps.h>
#include "macsec.h" #include "macsec.h"
#include "data_direct.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; 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) 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); bitmap_free(dev->var_table.bitmap);
} }
@ -4253,6 +4293,13 @@ static int mlx5_ib_stage_caps_init(struct mlx5_ib_dev *dev)
return err; 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; dev->ib_dev.use_cq_dim = true;
return 0; return 0;