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hc
2024-01-04 1543e317f1da31b75942316931e8f491a8920811 
 kernel/drivers/infiniband/core/rdma_core.h
....@@ -48,30 +48,7 @@
4848 void uverbs_destroy_ufile_hw(struct ib_uverbs_file *ufile,
4949 			     enum rdma_remove_reason reason);
5050 
51
-int uobj_destroy(struct ib_uobject *uobj);
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-
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-/*
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- * uverbs_uobject_get is called in order to increase the reference count on
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- * an uobject. This is useful when a handler wants to keep the uobject's memory
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- * alive, regardless if this uobject is still alive in the context's objects
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- * repository. Objects are put via uverbs_uobject_put.
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- */
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-void uverbs_uobject_get(struct ib_uobject *uobject);
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-
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-/*
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- * In order to indicate we no longer needs this uobject, uverbs_uobject_put
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- * is called. When the reference count is decreased, the uobject is freed.
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- * For example, this is used when attaching a completion channel to a CQ.
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- */
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-void uverbs_uobject_put(struct ib_uobject *uobject);
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-
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-/* Indicate this fd is no longer used by this consumer, but its memory isn't
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- * necessarily released yet. When the last reference is put, we release the
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- * memory. After this call is executed, calling uverbs_uobject_get isn't
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- * allowed.
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- * This must be called from the release file_operations of the file!
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- */
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-void uverbs_close_fd(struct file *f);
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+int uobj_destroy(struct ib_uobject *uobj, struct uverbs_attr_bundle *attrs);
7552 
7653 /*
7754  * Get an ib_uobject that corresponds to the given id from ufile, assuming
....@@ -83,31 +60,19 @@
8360  * uverbs_finalize_objects are called.
8461  */
8562 struct ib_uobject *
86
-uverbs_get_uobject_from_file(u16 object_id,
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-			     struct ib_uverbs_file *ufile,
88
-			     enum uverbs_obj_access access, s64 id);
63
+uverbs_get_uobject_from_file(u16 object_id, enum uverbs_obj_access access,
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+			     s64 id, struct uverbs_attr_bundle *attrs);
8965 
90
-/*
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- * Note that certain finalize stages could return a status:
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- *   (a) alloc_commit could return a failure if the object is committed at the
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- *       same time when the context is destroyed.
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- *   (b) remove_commit could fail if the object wasn't destroyed successfully.
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- * Since multiple objects could be finalized in one transaction, it is very NOT
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- * recommended to have several finalize actions which have side effects.
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- * For example, it's NOT recommended to have a certain action which has both
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- * a commit action and a destroy action or two destroy objects in the same
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- * action. The rule of thumb is to have one destroy or commit action with
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- * multiple lookups.
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- * The first non zero return value of finalize_object is returned from this
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- * function. For example, this could happen when we couldn't destroy an
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- * object.
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- */
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-int uverbs_finalize_object(struct ib_uobject *uobj,
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-			   enum uverbs_obj_access access,
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-			   bool commit);
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+void uverbs_finalize_object(struct ib_uobject *uobj,
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+			    enum uverbs_obj_access access, bool hw_obj_valid,
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+			    bool commit, struct uverbs_attr_bundle *attrs);
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+
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+int uverbs_output_written(const struct uverbs_attr_bundle *bundle, size_t idx);
10871 
10972 void setup_ufile_idr_uobject(struct ib_uverbs_file *ufile);
11073 void release_ufile_idr_uobject(struct ib_uverbs_file *ufile);
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+
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+struct ib_udata *uverbs_get_cleared_udata(struct uverbs_attr_bundle *attrs);
11176 
11277 /*
11378  * This is the runtime description of the uverbs API, used by the syscall
....@@ -118,47 +83,109 @@
11883  * Depending on ID the slot pointer in the radix tree points at one of these
11984  * structs.
12085  */
121
-struct uverbs_api_object {
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-	const struct uverbs_obj_type *type_attrs;
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-	const struct uverbs_obj_type_class *type_class;
124
-};
12586 
12687 struct uverbs_api_ioctl_method {
127
-	int (__rcu *handler)(struct ib_uverbs_file *ufile,
128
-			     struct uverbs_attr_bundle *ctx);
88
+	int(__rcu *handler)(struct uverbs_attr_bundle *attrs);
12989 	DECLARE_BITMAP(attr_mandatory, UVERBS_API_ATTR_BKEY_LEN);
13090 	u16 bundle_size;
13191 	u8 use_stack:1;
13292 	u8 driver_method:1;
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+	u8 disabled:1;
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+	u8 has_udata:1;
13395 	u8 key_bitmap_len;
13496 	u8 destroy_bkey;
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+};
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+
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+struct uverbs_api_write_method {
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+	int (*handler)(struct uverbs_attr_bundle *attrs);
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+	u8 disabled:1;
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+	u8 is_ex:1;
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+	u8 has_udata:1;
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+	u8 has_resp:1;
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+	u8 req_size;
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+	u8 resp_size;
135107 };
136108 
137109 struct uverbs_api_attr {
138110 	struct uverbs_attr_spec spec;
139111 };
140112 
141
-struct uverbs_api_object;
142113 struct uverbs_api {
143114 	/* radix tree contains struct uverbs_api_* pointers */
144115 	struct radix_tree_root radix;
145116 	enum rdma_driver_id driver_id;
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+
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+	unsigned int num_write;
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+	unsigned int num_write_ex;
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+	struct uverbs_api_write_method notsupp_method;
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+	const struct uverbs_api_write_method **write_methods;
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+	const struct uverbs_api_write_method **write_ex_methods;
146123 };
147124 
125
+/*
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+ * Get an uverbs_api_object that corresponds to the given object_id.
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+ * Note:
128
+ * -ENOMSG means that any object is allowed to match during lookup.
129
+ */
148130 static inline const struct uverbs_api_object *
149131 uapi_get_object(struct uverbs_api *uapi, u16 object_id)
150132 {
151
-	return radix_tree_lookup(&uapi->radix, uapi_key_obj(object_id));
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+	const struct uverbs_api_object *res;
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+
135
+	if (object_id == UVERBS_IDR_ANY_OBJECT)
136
+		return ERR_PTR(-ENOMSG);
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+
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+	res = radix_tree_lookup(&uapi->radix, uapi_key_obj(object_id));
139
+	if (!res)
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+		return ERR_PTR(-ENOENT);
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+
142
+	return res;
152143 }
153144 
154145 char *uapi_key_format(char *S, unsigned int key);
155
-struct uverbs_api *uverbs_alloc_api(
156
-	const struct uverbs_object_tree_def *const *driver_specs,
157
-	enum rdma_driver_id driver_id);
146
+struct uverbs_api *uverbs_alloc_api(struct ib_device *ibdev);
158147 void uverbs_disassociate_api_pre(struct ib_uverbs_device *uverbs_dev);
159148 void uverbs_disassociate_api(struct uverbs_api *uapi);
160149 void uverbs_destroy_api(struct uverbs_api *uapi);
161150 void uapi_compute_bundle_size(struct uverbs_api_ioctl_method *method_elm,
162151 			      unsigned int num_attrs);
152
+void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile);
153
+
154
+extern const struct uapi_definition uverbs_def_obj_async_fd[];
155
+extern const struct uapi_definition uverbs_def_obj_counters[];
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+extern const struct uapi_definition uverbs_def_obj_cq[];
157
+extern const struct uapi_definition uverbs_def_obj_device[];
158
+extern const struct uapi_definition uverbs_def_obj_dm[];
159
+extern const struct uapi_definition uverbs_def_obj_flow_action[];
160
+extern const struct uapi_definition uverbs_def_obj_intf[];
161
+extern const struct uapi_definition uverbs_def_obj_mr[];
162
+extern const struct uapi_definition uverbs_def_obj_qp[];
163
+extern const struct uapi_definition uverbs_def_obj_srq[];
164
+extern const struct uapi_definition uverbs_def_obj_wq[];
165
+extern const struct uapi_definition uverbs_def_write_intf[];
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+
167
+static inline const struct uverbs_api_write_method *
168
+uapi_get_method(const struct uverbs_api *uapi, u32 command)
169
+{
170
+	u32 cmd_idx = command & IB_USER_VERBS_CMD_COMMAND_MASK;
171
+
172
+	if (command & ~(u32)(IB_USER_VERBS_CMD_FLAG_EXTENDED |
173
+			     IB_USER_VERBS_CMD_COMMAND_MASK))
174
+		return ERR_PTR(-EINVAL);
175
+
176
+	if (command & IB_USER_VERBS_CMD_FLAG_EXTENDED) {
177
+		if (cmd_idx >= uapi->num_write_ex)
178
+			return ERR_PTR(-EOPNOTSUPP);
179
+		return uapi->write_ex_methods[cmd_idx];
180
+	}
181
+
182
+	if (cmd_idx >= uapi->num_write)
183
+		return ERR_PTR(-EOPNOTSUPP);
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+	return uapi->write_methods[cmd_idx];
185
+}
186
+
187
+void uverbs_fill_udata(struct uverbs_attr_bundle *bundle,
188
+		       struct ib_udata *udata, unsigned int attr_in,
189
+		       unsigned int attr_out);
163190 
164191 #endif /* RDMA_CORE_H */