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, DEVLINK_ATTR_PAD) ||  in devlink_resource_size_params_put()
147 			      size_params->size_max, DEVLINK_ATTR_PAD) ||  in devlink_resource_size_params_put()
149 			      size_params->size_min, DEVLINK_ATTR_PAD) ||  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()
166 				struct devlink_resource *resource)  in devlink_resource_put()  argument
174 		return -EMSGSIZE;  in devlink_resource_put()
176 	if (nla_put_string(skb, DEVLINK_ATTR_RESOURCE_NAME, resource->name) ||  in devlink_resource_put()
177 	    nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_SIZE, resource->size,  in devlink_resource_put()
179 	    nla_put_u64_64bit(skb, DEVLINK_ATTR_RESOURCE_ID, resource->id,  in devlink_resource_put()
182 	if (resource->size != resource->size_new &&  in devlink_resource_put()
184 			      resource->size_new, DEVLINK_ATTR_PAD))  in devlink_resource_put()
186 	if (devlink_resource_occ_put(resource, skb))  in devlink_resource_put()
188 	if (devlink_resource_size_params_put(resource, skb))  in devlink_resource_put()
190 	if (list_empty(&resource->resource_list))  in devlink_resource_put()
194 		       resource->size_valid))  in devlink_resource_put()
202 	list_for_each_entry(child_resource, &resource->resource_list, list) {  in devlink_resource_put()
216 	return -EMSGSIZE;  in devlink_resource_put()
222 	struct devlink *devlink = info->user_ptr[0];  in devlink_resource_fill()
223 	struct devlink_resource *resource;  in devlink_resource_fill()  local
232 	resource = list_first_entry(&devlink->resource_list,  in devlink_resource_fill()
239 	hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,  in devlink_resource_fill()
243 		return -EMSGSIZE;  in devlink_resource_fill()
256 	list_for_each_entry_from(resource, &devlink->resource_list, list) {  in devlink_resource_fill()
257 		err = devlink_resource_put(devlink, skb, resource);  in devlink_resource_fill()
271 	nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,  in devlink_resource_fill()
282 	err = -EMSGSIZE;  in devlink_resource_fill()
290 	struct devlink *devlink = info->user_ptr[0];  in devlink_nl_resource_dump_doit()
292 	if (list_empty(&devlink->resource_list))  in devlink_nl_resource_dump_doit()
293 		return -EOPNOTSUPP;  in devlink_nl_resource_dump_doit()
299 			       struct devlink_resource *resource,  in devlink_resources_validate()  argument
305 	if (resource)  in devlink_resources_validate()
306 		resource_list = &resource->resource_list;  in devlink_resources_validate()
308 		resource_list = &devlink->resource_list;  in devlink_resources_validate()
310 	list_for_each_entry(resource, resource_list, list) {  in devlink_resources_validate()
311 		if (!resource->size_valid)  in devlink_resources_validate()
312 			return -EINVAL;  in devlink_resources_validate()
313 		err = devlink_resources_validate(devlink, resource, info);  in devlink_resources_validate()
321  * devl_resource_register - devlink resource register
324  * @resource_name: resource's name
325  * @resource_size: resource's size
326  * @resource_id: resource's id
327  * @parent_resource_id: resource's parent id
332  * Documentation/networking/devlink/devlink-resource.rst
341 	struct devlink_resource *resource;  in devl_resource_register()  local
345 	lockdep_assert_held(&devlink->lock);  in devl_resource_register()
349 	resource = devlink_resource_find(devlink, NULL, resource_id);  in devl_resource_register()
350 	if (resource)  in devl_resource_register()
351 		return -EINVAL;  in devl_resource_register()
353 	resource = kzalloc(sizeof(*resource), GFP_KERNEL);  in devl_resource_register()
354 	if (!resource)  in devl_resource_register()
355 		return -ENOMEM;  in devl_resource_register()
358 		resource_list = &devlink->resource_list;  in devl_resource_register()
365 			resource_list = &parent_resource->resource_list;  in devl_resource_register()
366 			resource->parent = parent_resource;  in devl_resource_register()
368 			kfree(resource);  in devl_resource_register()
369 			return -EINVAL;  in devl_resource_register()
373 	resource->name = resource_name;  in devl_resource_register()
374 	resource->size = resource_size;  in devl_resource_register()
375 	resource->size_new = resource_size;  in devl_resource_register()
376 	resource->id = resource_id;  in devl_resource_register()
377 	resource->size_valid = true;  in devl_resource_register()
378 	memcpy(&resource->size_params, size_params,  in devl_resource_register()
379 	       sizeof(resource->size_params));  in devl_resource_register()
380 	INIT_LIST_HEAD(&resource->resource_list);  in devl_resource_register()
381 	list_add_tail(&resource->list, resource_list);  in devl_resource_register()
388  *	devlink_resource_register - devlink resource register
391  *	@resource_name: resource's name
392  *	@resource_size: resource's size
393  *	@resource_id: resource's id
394  *	@parent_resource_id: resource's parent id
399  *	Documentation/networking/devlink/devlink-resource.rst
401  *	Context: Takes and release devlink->lock <mutex>.
421 					struct devlink_resource *resource)  in devlink_resource_unregister()  argument
425 	list_for_each_entry_safe(child_resource, tmp, &resource->resource_list,  in devlink_resource_unregister()
428 		list_del(&child_resource->list);  in devlink_resource_unregister()
434  * devl_resources_unregister - free all resources
442 	lockdep_assert_held(&devlink->lock);  in devl_resources_unregister()
444 	list_for_each_entry_safe(child_resource, tmp, &devlink->resource_list,  in devl_resources_unregister()
447 		list_del(&child_resource->list);  in devl_resources_unregister()
454  *	devlink_resources_unregister - free all resources
458  *	Context: Takes and release devlink->lock <mutex>.
469  * devl_resource_size_get - get and update size
472  * @resource_id: the requested resource id
479 	struct devlink_resource *resource;  in devl_resource_size_get()  local
481 	lockdep_assert_held(&devlink->lock);  in devl_resource_size_get()
483 	resource = devlink_resource_find(devlink, NULL, resource_id);  in devl_resource_size_get()
484 	if (!resource)  in devl_resource_size_get()
485 		return -EINVAL;  in devl_resource_size_get()
486 	*p_resource_size = resource->size_new;  in devl_resource_size_get()
487 	resource->size = resource->size_new;  in devl_resource_size_get()
493  * devl_resource_occ_get_register - register occupancy getter
496  * @resource_id: resource id
505 	struct devlink_resource *resource;  in devl_resource_occ_get_register()  local
507 	lockdep_assert_held(&devlink->lock);  in devl_resource_occ_get_register()
509 	resource = devlink_resource_find(devlink, NULL, resource_id);  in devl_resource_occ_get_register()
510 	if (WARN_ON(!resource))  in devl_resource_occ_get_register()
512 	WARN_ON(resource->occ_get);  in devl_resource_occ_get_register()
514 	resource->occ_get = occ_get;  in devl_resource_occ_get_register()
515 	resource->occ_get_priv = occ_get_priv;  in devl_resource_occ_get_register()
520  *	devlink_resource_occ_get_register - register occupancy getter
523  *	@resource_id: resource id
527  *	Context: Takes and release devlink->lock <mutex>.
542  * devl_resource_occ_get_unregister - unregister occupancy getter
545  * @resource_id: resource id
550 	struct devlink_resource *resource;  in devl_resource_occ_get_unregister()  local
552 	lockdep_assert_held(&devlink->lock);  in devl_resource_occ_get_unregister()
554 	resource = devlink_resource_find(devlink, NULL, resource_id);  in devl_resource_occ_get_unregister()
555 	if (WARN_ON(!resource))  in devl_resource_occ_get_unregister()
557 	WARN_ON(!resource->occ_get);  in devl_resource_occ_get_unregister()
559 	resource->occ_get = NULL;  in devl_resource_occ_get_unregister()
560 	resource->occ_get_priv = NULL;  in devl_resource_occ_get_unregister()
565  *	devlink_resource_occ_get_unregister - unregister occupancy getter
568  *	@resource_id: resource id
570  *	Context: Takes and release devlink->lock <mutex>.