1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ 2 /* 3 * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved. 4 */ 5 6 #ifndef _UVERBS_NAMED_IOCTL_ 7 #define _UVERBS_NAMED_IOCTL_ 8 9 #include <rdma/uverbs_ioctl.h> 10 11 #ifndef UVERBS_MODULE_NAME 12 #error "Please #define UVERBS_MODULE_NAME before including rdma/uverbs_named_ioctl.h" 13 #endif 14 15 #define _UVERBS_PASTE(x, y) x ## y 16 #define _UVERBS_NAME(x, y) _UVERBS_PASTE(x, y) 17 #define UVERBS_METHOD(id) _UVERBS_NAME(UVERBS_MODULE_NAME, _method_##id) 18 #define UVERBS_HANDLER(id) _UVERBS_NAME(UVERBS_MODULE_NAME, _handler_##id) 19 #define UVERBS_OBJECT(id) _UVERBS_NAME(UVERBS_MODULE_NAME, _object_##id) 20 21 /* These are static so they do not need to be qualified */ 22 #define UVERBS_METHOD_ATTRS(method_id) _method_attrs_##method_id 23 #define UVERBS_OBJECT_METHODS(object_id) _UVERBS_NAME(_object_methods_##object_id, __LINE__) 24 25 #define DECLARE_UVERBS_NAMED_METHOD(_method_id, ...) \ 26 static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS( \ 27 _method_id)[] = { __VA_ARGS__ }; \ 28 static const struct uverbs_method_def UVERBS_METHOD(_method_id) = { \ 29 .id = _method_id, \ 30 .handler = UVERBS_HANDLER(_method_id), \ 31 .num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)), \ 32 .attrs = &UVERBS_METHOD_ATTRS(_method_id), \ 33 } 34 35 /* Create a standard destroy method using the default handler. The handle_attr 36 * argument must be the attribute specifying the handle to destroy, the 37 * default handler does not support any other attributes. 38 */ 39 #define DECLARE_UVERBS_NAMED_METHOD_DESTROY(_method_id, _handle_attr) \ 40 static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS( \ 41 _method_id)[] = { _handle_attr }; \ 42 static const struct uverbs_method_def UVERBS_METHOD(_method_id) = { \ 43 .id = _method_id, \ 44 .handler = uverbs_destroy_def_handler, \ 45 .num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)), \ 46 .attrs = &UVERBS_METHOD_ATTRS(_method_id), \ 47 } 48 49 #define DECLARE_UVERBS_NAMED_OBJECT(_object_id, _type_attrs, ...) \ 50 static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS( \ 51 _object_id)[] = { __VA_ARGS__ }; \ 52 static const struct uverbs_object_def UVERBS_OBJECT(_object_id) = { \ 53 .id = _object_id, \ 54 .type_attrs = &_type_attrs, \ 55 .num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)), \ 56 .methods = &UVERBS_OBJECT_METHODS(_object_id) \ 57 } 58 59 /* 60 * Declare global methods. These still have a unique object_id because we 61 * identify all uapi methods with a (object,method) tuple. However, they have 62 * no type pointer. 63 */ 64 #define DECLARE_UVERBS_GLOBAL_METHODS(_object_id, ...) \ 65 static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS( \ 66 _object_id)[] = { __VA_ARGS__ }; \ 67 static const struct uverbs_object_def UVERBS_OBJECT(_object_id) = { \ 68 .id = _object_id, \ 69 .num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)), \ 70 .methods = &UVERBS_OBJECT_METHODS(_object_id) \ 71 } 72 73 /* Used by drivers to declare a complete parsing tree for new methods 74 */ 75 #define ADD_UVERBS_METHODS(_name, _object_id, ...) \ 76 static const struct uverbs_method_def *const UVERBS_OBJECT_METHODS( \ 77 _object_id)[] = { __VA_ARGS__ }; \ 78 static const struct uverbs_object_def _name = { \ 79 .id = _object_id, \ 80 .num_methods = ARRAY_SIZE(UVERBS_OBJECT_METHODS(_object_id)), \ 81 .methods = &UVERBS_OBJECT_METHODS(_object_id) \ 82 }; 83 84 /* Used by drivers to declare a complete parsing tree for a single method that 85 * differs only in having additional driver specific attributes. 86 */ 87 #define ADD_UVERBS_ATTRIBUTES_SIMPLE(_name, _object_id, _method_id, ...) \ 88 static const struct uverbs_attr_def *const UVERBS_METHOD_ATTRS( \ 89 _method_id)[] = { __VA_ARGS__ }; \ 90 static const struct uverbs_method_def UVERBS_METHOD(_method_id) = { \ 91 .id = _method_id, \ 92 .num_attrs = ARRAY_SIZE(UVERBS_METHOD_ATTRS(_method_id)), \ 93 .attrs = &UVERBS_METHOD_ATTRS(_method_id), \ 94 }; \ 95 ADD_UVERBS_METHODS(_name, _object_id, &UVERBS_METHOD(_method_id)) 96 97 #endif 98