From: Yishai Hadas <yishaih@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/std_types.c | 55 +++++++++++++++++++++++-
include/uapi/rdma/mlx5_user_ioctl_cmds.h | 5 +++
2 files changed, 59 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/mlx5/std_types.c b/drivers/infiniband/hw/mlx5/std_types.c
index bbfcce3bdc84..ffeb1e1a1538 100644
--- a/drivers/infiniband/hw/mlx5/std_types.c
+++ b/drivers/infiniband/hw/mlx5/std_types.c
@@ -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>
@@ -183,6 +184,50 @@ 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,
@@ -193,9 +238,17 @@ 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,
diff --git a/include/uapi/rdma/mlx5_user_ioctl_cmds.h b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
index 106276a4cce7..fd2e4a3a56b3 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_cmds.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
@@ -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
--
2.45.2
