From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leon Romanovsky Subject: [PATCH rdma-next v2 19/20] IB/mlx5: Add DEVX query EQN support Date: Sun, 17 Jun 2018 13:00:05 +0300 Message-ID: <20180617100006.30663-20-leon@kernel.org> References: <20180617100006.30663-1-leon@kernel.org> Return-path: In-Reply-To: <20180617100006.30663-1-leon@kernel.org> Sender: netdev-owner@vger.kernel.org To: Doug Ledford , Jason Gunthorpe Cc: Leon Romanovsky , RDMA mailing list , Joonas Lahtinen , Matan Barak , Yishai Hadas , Saeed Mahameed , linux-netdev List-Id: linux-rdma@vger.kernel.org From: Yishai Hadas 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 Signed-off-by: Leon Romanovsky --- 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