1 // SPDX-License-Identifier: GPL-2.0-or-later
10  * struct devlink_resource - devlink resource
11  * @name: name of the resource
12  * @id: id, per devlink instance
13  * @size: size of the resource
14  * @size_new: updated size of the resource, reload is needed
15  * @size_valid: valid in case the total size of the resource is valid
17  * @parent: parent resource
26 	u64 id;  member
40 		      struct devlink_resource *resource, u64 resource_id)  in devlink_resource_find()  argument
44 	if (resource)  in devlink_resource_find()
45 		resource_list = &resource->resource_list;  in devlink_resource_find()
47 		resource_list = &devlink->resource_list;  in devlink_resource_find()
49 	list_for_each_entry(resource, resource_list, list) {  in devlink_resource_find()
52 		if (resource->id == resource_id)  in devlink_resource_find()
53 			return resource;  in devlink_resource_find()
55 		child_resource = devlink_resource_find(devlink, resource,  in devlink_resource_find()
64 devlink_resource_validate_children(struct devlink_resource *resource)  in devlink_resource_validate_children()  argument
70 	if (list_empty(&resource->resource_list))  in devlink_resource_validate_children()
73 	list_for_each_entry(child_resource, &resource->resource_list, list)  in devlink_resource_validate_children()
74 		parts_size += child_resource->size_new;  in devlink_resource_validate_children()
76 	if (parts_size > resource->size_new)  in devlink_resource_validate_children()
79 	resource->size_valid = size_valid;  in devlink_resource_validate_children()
83 devlink_resource_validate_size(struct devlink_resource *resource, u64 size,  in devlink_resource_validate_size()  argument
89 	if (size > resource->size_params.size_max) {  in devlink_resource_validate_size()
91 		err = -EINVAL;  in devlink_resource_validate_size()
94 	if (size < resource->size_params.size_min) {  in devlink_resource_validate_size()
96 		err = -EINVAL;  in devlink_resource_validate_size()
99 	div64_u64_rem(size, resource->size_params.size_granularity, &reminder);  in devlink_resource_validate_size()
102 		err = -EINVAL;  in devlink_resource_validate_size()
110 	struct devlink *devlink = info->user_ptr[0];  in devlink_nl_resource_set_doit()
111 	struct devlink_resource *resource;  in devlink_nl_resource_set_doit()  local
118 		return -EINVAL;  in devlink_nl_resource_set_doit()
119 	resource_id = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_ID]);  in devlink_nl_resource_set_doit()
121 	resource = devlink_resource_find(devlink, NULL, resource_id);  in devlink_nl_resource_set_doit()
122 	if (!resource)  in devlink_nl_resource_set_doit()
123 		return -EINVAL;  in devlink_nl_resource_set_doit()
125 	size = nla_get_u64(info->attrs[DEVLINK_ATTR_RESOURCE_SIZE]);  in devlink_nl_resource_set_doit()
126 	err = devlink_resource_validate_size(resource, size, info->extack);  in devlink_nl_resource_set_doit()
130 	resource->size_new = size;  in devlink_nl_resource_set_doit()
131 	devlink_resource_validate_children(resource);  in devlink_nl_resource_set_doit()
132 	if (resource->parent)  in devlink_nl_resource_set_doit()
133 		devlink_resource_validate_children(resource->parent);  in devlink_nl_resource_set_doit()
138 devlink_resource_size_params_put(struct devlink_resource *resource,  in devlink_resource_size_params_put()  argument
143 	size_params = &resource->size_params;  in devlink_resource_size_params_put()
145 			       size_params->size_granularity) ||  in devlink_resource_size_params_put()
147 			       size_params->size_max) ||  in devlink_resource_size_params_put()
149 			       size_params->size_min) ||  in devlink_resource_size_params_put()
150 	    nla_put_u8(skb, DEVLINK_ATTR_RESOURCE_UNIT, size_params->unit))  in devlink_resource_size_params_put()
151 		return -EMSGSIZE;  in devlink_resource_size_params_put()
155 static int devlink_resource_occ_put(struct devlink_resource *resource,  in devlink_resource_occ_put()  argument
158 	if (!resource->occ_get)  in devlink_resource_occ_put()
161 				  resource->occ_get(resource->occ_get_priv));  in devlink_resource_occ_put()
165 				struct devlink_resource *resource)  in devlink_resource_put()  argument
173 		return -EMSGSIZE;  in devlink_resource_put()
175 	if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||  in devlink_resource_put()
176 	    devlink_nl_put_u64(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size) ||  in devlink_resource_put()
177 	    devlink_nl_put_u64(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id))  in devlink_resource_put()
179 	if (resource->size != resource->size_new &&  in devlink_resource_put()
181 			       resource->size_new))  in devlink_resource_put()
183 	if (devlink_resource_occ_put(resource, skb))  in devlink_resource_put()
185 	if (devlink_resource_size_params_put(resource, skb))  in devlink_resource_put()
187 	if (list_empty(&resource->resource_list))  in devlink_resource_put()
191 		       resource->size_valid))  in devlink_resource_put()
199 	list_for_each_entry(child_resource, &resource->resource_list, list) {  in devlink_resource_put()
213 	return -EMSGSIZE;  in devlink_resource_put()
219 	struct devlink *devlink = info->user_ptr[0];  in devlink_resource_fill()
220 	struct devlink_resource *resource;  in devlink_resource_fill()  local
229 	resource = list_first_entry(&devlink->resource_list,  in devlink_resource_fill()
236 	hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,  in devlink_resource_fill()
240 		return -EMSGSIZE;  in devlink_resource_fill()
253 	list_for_each_entry_from(resource, &devlink->resource_list, list) {  in devlink_resource_fill()
254 		err = devlink_resource_put(devlink, skb, resource);  in devlink_resource_fill()
268 	nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,  in devlink_resource_fill()
279 	err = -EMSGSIZE;  in devlink_resource_fill()
287 	struct devlink *devlink = info->user_ptr[0];  in devlink_nl_resource_dump_doit()
289 	if (list_empty(&devlink->resource_list))  in devlink_nl_resource_dump_doit()
290 		return -EOPNOTSUPP;  in devlink_nl_resource_dump_doit()
296 			       struct devlink_resource *resource,  in devlink_resources_validate()  argument
302 	if (resource)  in devlink_resources_validate()
303 		resource_list = &resource->resource_list;  in devlink_resources_validate()
305 		resource_list = &devlink->resource_list;  in devlink_resources_validate()
307 	list_for_each_entry(resource, resource_list, list) {  in devlink_resources_validate()
308 		if (!resource->size_valid)  in devlink_resources_validate()
309 			return -EINVAL;  in devlink_resources_validate()
310 		err = devlink_resources_validate(devlink, resource, info);  in devlink_resources_validate()
318  * devl_resource_register - devlink resource register
321  * @resource_name: resource's name
322  * @resource_size: resource's size
323  * @resource_id: resource's id
324  * @parent_resource_id: resource's parent id
329  * Documentation/networking/devlink/devlink-resource.rst
338 	struct devlink_resource *resource;  in devl_resource_register()  local
342 	lockdep_assert_held(&devlink->lock);  in devl_resource_register()
346 	resource = devlink_resource_find(devlink, NULL, resource_id);  in devl_resource_register()
347 	if (resource)  in devl_resource_register()
348 		return -EEXIST;  in devl_resource_register()
350 	resource = kzalloc(sizeof(*resource), GFP_KERNEL);  in devl_resource_register()
351 	if (!resource)  in devl_resource_register()
352 		return -ENOMEM;  in devl_resource_register()
355 		resource_list = &devlink->resource_list;  in devl_resource_register()
362 			resource_list = &parent_resource->resource_list;  in devl_resource_register()
363 			resource->parent = parent_resource;  in devl_resource_register()
365 			kfree(resource);  in devl_resource_register()
366 			return -EINVAL;  in devl_resource_register()
370 	resource->name = resource_name;  in devl_resource_register()
371 	resource->size = resource_size;  in devl_resource_register()
372 	resource->size_new = resource_size;  in devl_resource_register()
373 	resource->id = resource_id;  in devl_resource_register()
374 	resource->size_valid = true;  in devl_resource_register()
375 	memcpy(&resource->size_params, size_params,  in devl_resource_register()
376 	       sizeof(resource->size_params));  in devl_resource_register()
377 	INIT_LIST_HEAD(&resource->resource_list);  in devl_resource_register()
378 	list_add_tail(&resource->list, resource_list);  in devl_resource_register()
385 					struct devlink_resource *resource)  in devlink_resource_unregister()  argument
389 	list_for_each_entry_safe(child_resource, tmp, &resource->resource_list,  in devlink_resource_unregister()
392 		list_del(&child_resource->list);  in devlink_resource_unregister()
398  * devl_resources_unregister - free all resources
406 	lockdep_assert_held(&devlink->lock);  in devl_resources_unregister()
408 	list_for_each_entry_safe(child_resource, tmp, &devlink->resource_list,  in devl_resources_unregister()
411 		list_del(&child_resource->list);  in devl_resources_unregister()
418  *	devlink_resources_unregister - free all resources
422  *	Context: Takes and release devlink->lock <mutex>.
433  * devl_resource_size_get - get and update size
436  * @resource_id: the requested resource id
443 	struct devlink_resource *resource;  in devl_resource_size_get()  local
445 	lockdep_assert_held(&devlink->lock);  in devl_resource_size_get()
447 	resource = devlink_resource_find(devlink, NULL, resource_id);  in devl_resource_size_get()
448 	if (!resource)  in devl_resource_size_get()
449 		return -EINVAL;  in devl_resource_size_get()
450 	*p_resource_size = resource->size_new;  in devl_resource_size_get()
451 	resource->size = resource->size_new;  in devl_resource_size_get()
457  * devl_resource_occ_get_register - register occupancy getter
460  * @resource_id: resource id
469 	struct devlink_resource *resource;  in devl_resource_occ_get_register()  local
471 	lockdep_assert_held(&devlink->lock);  in devl_resource_occ_get_register()
473 	resource = devlink_resource_find(devlink, NULL, resource_id);  in devl_resource_occ_get_register()
474 	if (WARN_ON(!resource))  in devl_resource_occ_get_register()
476 	WARN_ON(resource->occ_get);  in devl_resource_occ_get_register()
478 	resource->occ_get = occ_get;  in devl_resource_occ_get_register()
479 	resource->occ_get_priv = occ_get_priv;  in devl_resource_occ_get_register()
484  * devl_resource_occ_get_unregister - unregister occupancy getter
487  * @resource_id: resource id
492 	struct devlink_resource *resource;  in devl_resource_occ_get_unregister()  local
494 	lockdep_assert_held(&devlink->lock);  in devl_resource_occ_get_unregister()
496 	resource = devlink_resource_find(devlink, NULL, resource_id);  in devl_resource_occ_get_unregister()
497 	if (WARN_ON(!resource))  in devl_resource_occ_get_unregister()
499 	WARN_ON(!resource->occ_get);  in devl_resource_occ_get_unregister()
501 	resource->occ_get = NULL;  in devl_resource_occ_get_unregister()
502 	resource->occ_get_priv = NULL;  in devl_resource_occ_get_unregister()