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RDMA/mlx5: Implement the query ucontext functionality
Implement the query ucontext functionality by returning the original ucontext data as part of an extra mlx5 attribute that holds the driver UAPI response. Link: https://lore.kernel.org/r/20200630093916.332097-6-leon@kernel.org Signed-off-by: Yishai Hadas <yishaih@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
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3 changed files with 40 additions and 0 deletions
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@ -790,6 +790,7 @@ int uverbs_copy_to_struct_or_zero(const struct uverbs_attr_bundle *bundle,
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}
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return uverbs_copy_to(bundle, idx, from, size);
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}
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EXPORT_SYMBOL(uverbs_copy_to_struct_or_zero);
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/* Once called an abort will call through to the type's destroy_hw() */
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void uverbs_finalize_uobj_create(const struct uverbs_attr_bundle *bundle,
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@ -1990,6 +1990,29 @@ static int mlx5_ib_alloc_ucontext(struct ib_ucontext *uctx,
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return err;
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}
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static int mlx5_ib_query_ucontext(struct ib_ucontext *ibcontext,
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struct uverbs_attr_bundle *attrs)
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{
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struct mlx5_ib_alloc_ucontext_resp uctx_resp = {};
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int ret;
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ret = set_ucontext_resp(ibcontext, &uctx_resp);
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if (ret)
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return ret;
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uctx_resp.response_length =
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min_t(size_t,
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uverbs_attr_get_len(attrs,
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MLX5_IB_ATTR_QUERY_CONTEXT_RESP_UCTX),
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sizeof(uctx_resp));
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ret = uverbs_copy_to_struct_or_zero(attrs,
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MLX5_IB_ATTR_QUERY_CONTEXT_RESP_UCTX,
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&uctx_resp,
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sizeof(uctx_resp));
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return ret;
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}
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static void mlx5_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
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{
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struct mlx5_ib_ucontext *context = to_mucontext(ibcontext);
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@ -6364,6 +6387,16 @@ ADD_UVERBS_ATTRIBUTES_SIMPLE(
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UVERBS_ATTR_FLAGS_IN(MLX5_IB_ATTR_CREATE_FLOW_ACTION_FLAGS,
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enum mlx5_ib_uapi_flow_action_flags));
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ADD_UVERBS_ATTRIBUTES_SIMPLE(
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mlx5_ib_query_context,
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UVERBS_OBJECT_DEVICE,
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UVERBS_METHOD_QUERY_CONTEXT,
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UVERBS_ATTR_PTR_OUT(
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MLX5_IB_ATTR_QUERY_CONTEXT_RESP_UCTX,
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UVERBS_ATTR_STRUCT(struct mlx5_ib_alloc_ucontext_resp,
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dump_fill_mkey),
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UA_MANDATORY));
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static const struct uapi_definition mlx5_ib_defs[] = {
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UAPI_DEF_CHAIN(mlx5_ib_devx_defs),
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UAPI_DEF_CHAIN(mlx5_ib_flow_defs),
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@ -6372,6 +6405,7 @@ static const struct uapi_definition mlx5_ib_defs[] = {
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UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_FLOW_ACTION,
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&mlx5_ib_flow_action),
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UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_DM, &mlx5_ib_dm),
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UAPI_DEF_CHAIN_OBJ_TREE(UVERBS_OBJECT_DEVICE, &mlx5_ib_query_context),
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UAPI_DEF_CHAIN_OBJ_TREE_NAMED(MLX5_IB_OBJECT_VAR,
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UAPI_DEF_IS_OBJ_SUPPORTED(var_is_supported)),
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UAPI_DEF_CHAIN_OBJ_TREE_NAMED(MLX5_IB_OBJECT_UAR),
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@ -6605,6 +6639,7 @@ static const struct ib_device_ops mlx5_ib_dev_ops = {
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.query_pkey = mlx5_ib_query_pkey,
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.query_qp = mlx5_ib_query_qp,
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.query_srq = mlx5_ib_query_srq,
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.query_ucontext = mlx5_ib_query_ucontext,
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.read_counters = mlx5_ib_read_counters,
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.reg_user_mr = mlx5_ib_reg_user_mr,
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.req_notify_cq = mlx5_ib_arm_cq,
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@ -228,6 +228,10 @@ enum mlx5_ib_flow_matcher_methods {
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MLX5_IB_METHOD_FLOW_MATCHER_DESTROY,
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};
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enum mlx5_ib_device_query_context_attrs {
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MLX5_IB_ATTR_QUERY_CONTEXT_RESP_UCTX = (1U << UVERBS_ID_NS_SHIFT),
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};
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#define MLX5_IB_DW_MATCH_PARAM 0x80
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struct mlx5_ib_match_params {
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