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IB/mlx5: Add DEVX query EQN support 

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 <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Yishai Hadas 2018-06-17 13:00:05 +03:00 committed by Jason Gunthorpe
parent aeae94579c
commit f6fe01b718
2 changed files with 39 additions and 1 deletions
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34
drivers/infiniband/hw/mlx5/devx.c
View File

@ -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
@ -979,6 +1004,12 @@ 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)),
@ -1050,7 +1081,8 @@ 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(0, devx_obj_cleanup),

6
include/uapi/rdma/mlx5_user_ioctl_cmds.h
View File

@ -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,