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RDMA/mlx5: Introduce GET_DATA_DIRECT_SYSFS_PATH ioctl

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Introduce the 'GET_DATA_DIRECT_SYSFS_PATH' ioctl to return the sysfs
path of the affiliated 'data direct' device for a given device.

Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://patch.msgid.link/403745463e0ef52adbef681ff09aa6a29a756352.1722512548.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Yishai Hadas 2024-08-01 15:05:17 +03:00 committed by Leon Romanovsky
parent de8f847a51
commit ec7ad65309
2 changed files with 59 additions and 1 deletions
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55
drivers/infiniband/hw/mlx5/std_types.c
View File

@ -10,6 +10,7 @@
#include <linux/mlx5/eswitch.h>
#include <linux/mlx5/vport.h>
#include "mlx5_ib.h"
#include "data_direct.h"
#define UVERBS_MODULE_NAME mlx5_ib
#include <rdma/uverbs_named_ioctl.h>
@ -204,6 +205,50 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_QUERY_PORT)(
sizeof(info));
}
static int UVERBS_HANDLER(MLX5_IB_METHOD_GET_DATA_DIRECT_SYSFS_PATH)(
struct uverbs_attr_bundle *attrs)
{
struct mlx5_data_direct_dev *data_direct_dev;
struct mlx5_ib_ucontext *c;
struct mlx5_ib_dev *dev;
int out_len = uverbs_attr_get_len(attrs,
MLX5_IB_ATTR_GET_DATA_DIRECT_SYSFS_PATH);
u32 dev_path_len;
char *dev_path;
int ret;
c = to_mucontext(ib_uverbs_get_ucontext(attrs));
if (IS_ERR(c))
return PTR_ERR(c);
dev = to_mdev(c->ibucontext.device);
mutex_lock(&dev->data_direct_lock);
data_direct_dev = dev->data_direct_dev;
if (!data_direct_dev) {
ret = -ENODEV;
goto end;
}
dev_path = kobject_get_path(&data_direct_dev->device->kobj, GFP_KERNEL);
if (!dev_path) {
ret = -ENOMEM;
goto end;
}
dev_path_len = strlen(dev_path) + 1;
if (dev_path_len > out_len) {
ret = -ENOSPC;
goto end;
}
ret = uverbs_copy_to(attrs, MLX5_IB_ATTR_GET_DATA_DIRECT_SYSFS_PATH, dev_path,
dev_path_len);
kfree(dev_path);
end:
mutex_unlock(&dev->data_direct_lock);
return ret;
}
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_QUERY_PORT,
UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_QUERY_PORT_PORT_NUM,
@ -214,9 +259,17 @@ DECLARE_UVERBS_NAMED_METHOD(
reg_c0),
UA_MANDATORY));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_GET_DATA_DIRECT_SYSFS_PATH,
UVERBS_ATTR_PTR_OUT(
MLX5_IB_ATTR_GET_DATA_DIRECT_SYSFS_PATH,
UVERBS_ATTR_MIN_SIZE(0),
UA_MANDATORY));
ADD_UVERBS_METHODS(mlx5_ib_device,
UVERBS_OBJECT_DEVICE,
&UVERBS_METHOD(MLX5_IB_METHOD_QUERY_PORT));
&UVERBS_METHOD(MLX5_IB_METHOD_QUERY_PORT),
&UVERBS_METHOD(MLX5_IB_METHOD_GET_DATA_DIRECT_SYSFS_PATH));
DECLARE_UVERBS_NAMED_METHOD(
MLX5_IB_METHOD_PD_QUERY,

5
include/uapi/rdma/mlx5_user_ioctl_cmds.h
View File

@ -348,6 +348,7 @@ enum mlx5_ib_pd_methods {
enum mlx5_ib_device_methods {
MLX5_IB_METHOD_QUERY_PORT = (1U << UVERBS_ID_NS_SHIFT),
MLX5_IB_METHOD_GET_DATA_DIRECT_SYSFS_PATH,
};
enum mlx5_ib_query_port_attrs {
@ -355,4 +356,8 @@ enum mlx5_ib_query_port_attrs {
MLX5_IB_ATTR_QUERY_PORT,
};
enum mlx5_ib_get_data_direct_sysfs_path_attrs {
MLX5_IB_ATTR_GET_DATA_DIRECT_SYSFS_PATH = (1U << UVERBS_ID_NS_SHIFT),
};
#endif