From: Yishai Hadas <yish...@mellanox.com>
Return the matching device EQN for a given user vector number via the
DEVX interface.
Note:
EQs are owned by the kernel and shared by all user processes.
Basically, a user CQ can point to any EQ.
The kernel doesn't enforce any such limitation today either.
Signed-off-by: Yishai Hadas <yish...@mellanox.com>
Signed-off-by: Leon Romanovsky <leo...@mellanox.com>
---
drivers/infiniband/hw/mlx5/devx.c | 34 +++++++++++++++++++++++++++++++-
include/uapi/rdma/mlx5_user_ioctl_cmds.h | 6 ++++++
2 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/mlx5/devx.c
b/drivers/infiniband/hw/mlx5/devx.c
index ba6b9b46cd90..de1a418331b2 100644
--- a/drivers/infiniband/hw/mlx5/devx.c
+++ b/drivers/infiniband/hw/mlx5/devx.c
@@ -389,6 +389,31 @@ static bool devx_is_general_cmd(void *in)
}
}
+static int UVERBS_HANDLER(MLX5_IB_METHOD_DEVX_QUERY_EQN)(struct ib_device
*ib_dev,
+ struct ib_uverbs_file *file,
+ struct uverbs_attr_bundle *attrs)
+{
+ struct mlx5_ib_dev *dev = to_mdev(ib_dev);
+ int user_vector;
+ int dev_eqn;
+ unsigned int irqn;
+ int err;
+
+ if (uverbs_copy_from(&user_vector, attrs,
+ MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC))
+ return -EFAULT;
+
+ err = mlx5_vector2eqn(dev->mdev, user_vector, &dev_eqn, &irqn);
+ if (err < 0)
+ return err;
+
+ if (uverbs_copy_to(attrs, MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
+ &dev_eqn, sizeof(dev_eqn)))
+ return -EFAULT;
+
+ return 0;
+}
+
/*
*Security note:
* The hardware protection mechanism works like this: Each device object that
@@ -978,6 +1003,12 @@ static
DECLARE_UVERBS_NAMED_METHOD(MLX5_IB_METHOD_DEVX_UMEM_DEREG,
UVERBS_ACCESS_DESTROY,
UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)));
+static DECLARE_UVERBS_NAMED_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN,
+ &UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC,
UVERBS_ATTR_TYPE(u32),
+ UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
+ &UVERBS_ATTR_PTR_OUT(MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
UVERBS_ATTR_TYPE(u32),
+ UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)));
+
static DECLARE_UVERBS_NAMED_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR,
&UVERBS_ATTR_PTR_IN(MLX5_IB_ATTR_DEVX_QUERY_UAR_USER_IDX,
UVERBS_ATTR_TYPE(u32),
UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)),
@@ -1049,7 +1080,8 @@ static
DECLARE_UVERBS_NAMED_METHOD(MLX5_IB_METHOD_DEVX_OBJ_QUERY,
static DECLARE_UVERBS_GLOBAL_METHODS(MLX5_IB_OBJECT_DEVX,
&UVERBS_METHOD(MLX5_IB_METHOD_DEVX_OTHER),
- &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR));
+ &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_UAR),
+ &UVERBS_METHOD(MLX5_IB_METHOD_DEVX_QUERY_EQN));
static DECLARE_UVERBS_NAMED_OBJECT(MLX5_IB_OBJECT_DEVX_OBJ,
&UVERBS_TYPE_ALLOC_IDR(devx_obj_cleanup),
diff --git a/include/uapi/rdma/mlx5_user_ioctl_cmds.h
b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
index dbc549a7bf50..1a05bb4b0b34 100644
--- a/include/uapi/rdma/mlx5_user_ioctl_cmds.h
+++ b/include/uapi/rdma/mlx5_user_ioctl_cmds.h
@@ -48,6 +48,7 @@ enum mlx5_ib_alloc_dm_attrs {
enum mlx5_ib_devx_methods {
MLX5_IB_METHOD_DEVX_OTHER = (1U << UVERBS_ID_NS_SHIFT),
MLX5_IB_METHOD_DEVX_QUERY_UAR,
+ MLX5_IB_METHOD_DEVX_QUERY_EQN,
};
enum mlx5_ib_devx_other_attrs {
@@ -82,6 +83,11 @@ enum mlx5_ib_devx_obj_query_attrs {
MLX5_IB_ATTR_DEVX_OBJ_QUERY_CMD_OUT,
};
+enum mlx5_ib_devx_query_eqn_attrs {
+ MLX5_IB_ATTR_DEVX_QUERY_EQN_USER_VEC = (1U << UVERBS_ID_NS_SHIFT),
+ MLX5_IB_ATTR_DEVX_QUERY_EQN_DEV_EQN,
+};
+
enum mlx5_ib_devx_obj_methods {
MLX5_IB_METHOD_DEVX_OBJ_CREATE = (1U << UVERBS_ID_NS_SHIFT),
MLX5_IB_METHOD_DEVX_OBJ_DESTROY,
--
2.14.4
