1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
5 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
6 #include <linux/moduleparam.h>
7 #include <linux/vmalloc.h>
8 #include <linux/device.h>
9 #include <linux/ndctl.h>
10 #include <linux/slab.h>
19 static DEFINE_IDA(dimm_ida);
22 * Retrieve bus and dimm handle and return if this bus supports
23 * get_config_data commands
25 int nvdimm_check_config_data(struct device *dev)
27 struct nvdimm *nvdimm = to_nvdimm(dev);
29 if (!nvdimm->cmd_mask ||
30 !test_bit(ND_CMD_GET_CONFIG_DATA, &nvdimm->cmd_mask)) {
31 if (test_bit(NDD_LABELING, &nvdimm->flags))
40 static int validate_dimm(struct nvdimm_drvdata *ndd)
47 rc = nvdimm_check_config_data(ndd->dev);
49 dev_dbg(ndd->dev, "%ps: %s error: %d\n",
50 __builtin_return_address(0), __func__, rc);
55 * nvdimm_init_nsarea - determine the geometry of a dimm's namespace area
56 * @nvdimm: dimm to initialize
58 int nvdimm_init_nsarea(struct nvdimm_drvdata *ndd)
60 struct nd_cmd_get_config_size *cmd = &ndd->nsarea;
61 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(ndd->dev);
62 struct nvdimm_bus_descriptor *nd_desc;
63 int rc = validate_dimm(ndd);
70 return 0; /* already valid */
72 memset(cmd, 0, sizeof(*cmd));
73 nd_desc = nvdimm_bus->nd_desc;
74 rc = nd_desc->ndctl(nd_desc, to_nvdimm(ndd->dev),
75 ND_CMD_GET_CONFIG_SIZE, cmd, sizeof(*cmd), &cmd_rc);
81 int nvdimm_get_config_data(struct nvdimm_drvdata *ndd, void *buf,
82 size_t offset, size_t len)
84 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(ndd->dev);
85 struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
86 int rc = validate_dimm(ndd), cmd_rc = 0;
87 struct nd_cmd_get_config_data_hdr *cmd;
88 size_t max_cmd_size, buf_offset;
93 if (offset + len > ndd->nsarea.config_size)
96 max_cmd_size = min_t(u32, len, ndd->nsarea.max_xfer);
97 cmd = kvzalloc(max_cmd_size + sizeof(*cmd), GFP_KERNEL);
101 for (buf_offset = 0; len;
102 len -= cmd->in_length, buf_offset += cmd->in_length) {
105 cmd->in_offset = offset + buf_offset;
106 cmd->in_length = min(max_cmd_size, len);
108 cmd_size = sizeof(*cmd) + cmd->in_length;
110 rc = nd_desc->ndctl(nd_desc, to_nvdimm(ndd->dev),
111 ND_CMD_GET_CONFIG_DATA, cmd, cmd_size, &cmd_rc);
119 /* out_buf should be valid, copy it into our output buffer */
120 memcpy(buf + buf_offset, cmd->out_buf, cmd->in_length);
127 int nvdimm_set_config_data(struct nvdimm_drvdata *ndd, size_t offset,
128 void *buf, size_t len)
130 size_t max_cmd_size, buf_offset;
131 struct nd_cmd_set_config_hdr *cmd;
132 int rc = validate_dimm(ndd), cmd_rc = 0;
133 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(ndd->dev);
134 struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
139 if (offset + len > ndd->nsarea.config_size)
142 max_cmd_size = min_t(u32, len, ndd->nsarea.max_xfer);
143 cmd = kvzalloc(max_cmd_size + sizeof(*cmd) + sizeof(u32), GFP_KERNEL);
147 for (buf_offset = 0; len; len -= cmd->in_length,
148 buf_offset += cmd->in_length) {
151 cmd->in_offset = offset + buf_offset;
152 cmd->in_length = min(max_cmd_size, len);
153 memcpy(cmd->in_buf, buf + buf_offset, cmd->in_length);
155 /* status is output in the last 4-bytes of the command buffer */
156 cmd_size = sizeof(*cmd) + cmd->in_length + sizeof(u32);
158 rc = nd_desc->ndctl(nd_desc, to_nvdimm(ndd->dev),
159 ND_CMD_SET_CONFIG_DATA, cmd, cmd_size, &cmd_rc);
172 void nvdimm_set_labeling(struct device *dev)
174 struct nvdimm *nvdimm = to_nvdimm(dev);
176 set_bit(NDD_LABELING, &nvdimm->flags);
179 void nvdimm_set_locked(struct device *dev)
181 struct nvdimm *nvdimm = to_nvdimm(dev);
183 set_bit(NDD_LOCKED, &nvdimm->flags);
186 void nvdimm_clear_locked(struct device *dev)
188 struct nvdimm *nvdimm = to_nvdimm(dev);
190 clear_bit(NDD_LOCKED, &nvdimm->flags);
193 static void nvdimm_release(struct device *dev)
195 struct nvdimm *nvdimm = to_nvdimm(dev);
197 ida_simple_remove(&dimm_ida, nvdimm->id);
201 struct nvdimm *to_nvdimm(struct device *dev)
203 struct nvdimm *nvdimm = container_of(dev, struct nvdimm, dev);
205 WARN_ON(!is_nvdimm(dev));
208 EXPORT_SYMBOL_GPL(to_nvdimm);
210 struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping)
212 struct nvdimm *nvdimm = nd_mapping->nvdimm;
214 WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm->dev));
216 return dev_get_drvdata(&nvdimm->dev);
218 EXPORT_SYMBOL(to_ndd);
220 void nvdimm_drvdata_release(struct kref *kref)
222 struct nvdimm_drvdata *ndd = container_of(kref, typeof(*ndd), kref);
223 struct device *dev = ndd->dev;
224 struct resource *res, *_r;
226 dev_dbg(dev, "trace\n");
227 nvdimm_bus_lock(dev);
228 for_each_dpa_resource_safe(ndd, res, _r)
229 nvdimm_free_dpa(ndd, res);
230 nvdimm_bus_unlock(dev);
237 void get_ndd(struct nvdimm_drvdata *ndd)
239 kref_get(&ndd->kref);
242 void put_ndd(struct nvdimm_drvdata *ndd)
245 kref_put(&ndd->kref, nvdimm_drvdata_release);
248 const char *nvdimm_name(struct nvdimm *nvdimm)
250 return dev_name(&nvdimm->dev);
252 EXPORT_SYMBOL_GPL(nvdimm_name);
254 struct kobject *nvdimm_kobj(struct nvdimm *nvdimm)
256 return &nvdimm->dev.kobj;
258 EXPORT_SYMBOL_GPL(nvdimm_kobj);
260 unsigned long nvdimm_cmd_mask(struct nvdimm *nvdimm)
262 return nvdimm->cmd_mask;
264 EXPORT_SYMBOL_GPL(nvdimm_cmd_mask);
266 void *nvdimm_provider_data(struct nvdimm *nvdimm)
269 return nvdimm->provider_data;
272 EXPORT_SYMBOL_GPL(nvdimm_provider_data);
274 static ssize_t commands_show(struct device *dev,
275 struct device_attribute *attr, char *buf)
277 struct nvdimm *nvdimm = to_nvdimm(dev);
280 if (!nvdimm->cmd_mask)
281 return sprintf(buf, "\n");
283 for_each_set_bit(cmd, &nvdimm->cmd_mask, BITS_PER_LONG)
284 len += sprintf(buf + len, "%s ", nvdimm_cmd_name(cmd));
285 len += sprintf(buf + len, "\n");
288 static DEVICE_ATTR_RO(commands);
290 static ssize_t flags_show(struct device *dev,
291 struct device_attribute *attr, char *buf)
293 struct nvdimm *nvdimm = to_nvdimm(dev);
295 return sprintf(buf, "%s%s\n",
296 test_bit(NDD_LABELING, &nvdimm->flags) ? "label " : "",
297 test_bit(NDD_LOCKED, &nvdimm->flags) ? "lock " : "");
299 static DEVICE_ATTR_RO(flags);
301 static ssize_t state_show(struct device *dev, struct device_attribute *attr,
304 struct nvdimm *nvdimm = to_nvdimm(dev);
307 * The state may be in the process of changing, userspace should
308 * quiesce probing if it wants a static answer
310 nvdimm_bus_lock(dev);
311 nvdimm_bus_unlock(dev);
312 return sprintf(buf, "%s\n", atomic_read(&nvdimm->busy)
313 ? "active" : "idle");
315 static DEVICE_ATTR_RO(state);
317 static ssize_t __available_slots_show(struct nvdimm_drvdata *ndd, char *buf)
327 nvdimm_bus_lock(dev);
328 nfree = nd_label_nfree(ndd);
329 if (nfree - 1 > nfree) {
330 dev_WARN_ONCE(dev, 1, "we ate our last label?\n");
334 rc = sprintf(buf, "%d\n", nfree);
335 nvdimm_bus_unlock(dev);
339 static ssize_t available_slots_show(struct device *dev,
340 struct device_attribute *attr, char *buf)
345 rc = __available_slots_show(dev_get_drvdata(dev), buf);
346 nd_device_unlock(dev);
350 static DEVICE_ATTR_RO(available_slots);
352 __weak ssize_t security_show(struct device *dev,
353 struct device_attribute *attr, char *buf)
355 struct nvdimm *nvdimm = to_nvdimm(dev);
357 if (test_bit(NVDIMM_SECURITY_OVERWRITE, &nvdimm->sec.flags))
358 return sprintf(buf, "overwrite\n");
359 if (test_bit(NVDIMM_SECURITY_DISABLED, &nvdimm->sec.flags))
360 return sprintf(buf, "disabled\n");
361 if (test_bit(NVDIMM_SECURITY_UNLOCKED, &nvdimm->sec.flags))
362 return sprintf(buf, "unlocked\n");
363 if (test_bit(NVDIMM_SECURITY_LOCKED, &nvdimm->sec.flags))
364 return sprintf(buf, "locked\n");
368 static ssize_t frozen_show(struct device *dev,
369 struct device_attribute *attr, char *buf)
371 struct nvdimm *nvdimm = to_nvdimm(dev);
373 return sprintf(buf, "%d\n", test_bit(NVDIMM_SECURITY_FROZEN,
374 &nvdimm->sec.flags));
376 static DEVICE_ATTR_RO(frozen);
378 static ssize_t security_store(struct device *dev,
379 struct device_attribute *attr, const char *buf, size_t len)
385 * Require all userspace triggered security management to be
386 * done while probing is idle and the DIMM is not in active use
390 nvdimm_bus_lock(dev);
391 wait_nvdimm_bus_probe_idle(dev);
392 rc = nvdimm_security_store(dev, buf, len);
393 nvdimm_bus_unlock(dev);
394 nd_device_unlock(dev);
398 static DEVICE_ATTR_RW(security);
400 static struct attribute *nvdimm_attributes[] = {
401 &dev_attr_state.attr,
402 &dev_attr_flags.attr,
403 &dev_attr_commands.attr,
404 &dev_attr_available_slots.attr,
405 &dev_attr_security.attr,
406 &dev_attr_frozen.attr,
410 static umode_t nvdimm_visible(struct kobject *kobj, struct attribute *a, int n)
412 struct device *dev = container_of(kobj, typeof(*dev), kobj);
413 struct nvdimm *nvdimm = to_nvdimm(dev);
415 if (a != &dev_attr_security.attr && a != &dev_attr_frozen.attr)
417 if (!nvdimm->sec.flags)
420 if (a == &dev_attr_security.attr) {
421 /* Are there any state mutation ops (make writable)? */
422 if (nvdimm->sec.ops->freeze || nvdimm->sec.ops->disable
423 || nvdimm->sec.ops->change_key
424 || nvdimm->sec.ops->erase
425 || nvdimm->sec.ops->overwrite)
430 if (nvdimm->sec.ops->freeze)
435 static const struct attribute_group nvdimm_attribute_group = {
436 .attrs = nvdimm_attributes,
437 .is_visible = nvdimm_visible,
440 static ssize_t result_show(struct device *dev, struct device_attribute *attr, char *buf)
442 struct nvdimm *nvdimm = to_nvdimm(dev);
443 enum nvdimm_fwa_result result;
448 nvdimm_bus_lock(dev);
449 result = nvdimm->fw_ops->activate_result(nvdimm);
450 nvdimm_bus_unlock(dev);
453 case NVDIMM_FWA_RESULT_NONE:
454 return sprintf(buf, "none\n");
455 case NVDIMM_FWA_RESULT_SUCCESS:
456 return sprintf(buf, "success\n");
457 case NVDIMM_FWA_RESULT_FAIL:
458 return sprintf(buf, "fail\n");
459 case NVDIMM_FWA_RESULT_NOTSTAGED:
460 return sprintf(buf, "not_staged\n");
461 case NVDIMM_FWA_RESULT_NEEDRESET:
462 return sprintf(buf, "need_reset\n");
467 static DEVICE_ATTR_ADMIN_RO(result);
469 static ssize_t activate_show(struct device *dev, struct device_attribute *attr, char *buf)
471 struct nvdimm *nvdimm = to_nvdimm(dev);
472 enum nvdimm_fwa_state state;
477 nvdimm_bus_lock(dev);
478 state = nvdimm->fw_ops->activate_state(nvdimm);
479 nvdimm_bus_unlock(dev);
482 case NVDIMM_FWA_IDLE:
483 return sprintf(buf, "idle\n");
484 case NVDIMM_FWA_BUSY:
485 return sprintf(buf, "busy\n");
486 case NVDIMM_FWA_ARMED:
487 return sprintf(buf, "armed\n");
493 static ssize_t activate_store(struct device *dev, struct device_attribute *attr,
494 const char *buf, size_t len)
496 struct nvdimm *nvdimm = to_nvdimm(dev);
497 enum nvdimm_fwa_trigger arg;
503 if (sysfs_streq(buf, "arm"))
504 arg = NVDIMM_FWA_ARM;
505 else if (sysfs_streq(buf, "disarm"))
506 arg = NVDIMM_FWA_DISARM;
510 nvdimm_bus_lock(dev);
511 rc = nvdimm->fw_ops->arm(nvdimm, arg);
512 nvdimm_bus_unlock(dev);
518 static DEVICE_ATTR_ADMIN_RW(activate);
520 static struct attribute *nvdimm_firmware_attributes[] = {
521 &dev_attr_activate.attr,
522 &dev_attr_result.attr,
526 static umode_t nvdimm_firmware_visible(struct kobject *kobj, struct attribute *a, int n)
528 struct device *dev = container_of(kobj, typeof(*dev), kobj);
529 struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev);
530 struct nvdimm_bus_descriptor *nd_desc = nvdimm_bus->nd_desc;
531 struct nvdimm *nvdimm = to_nvdimm(dev);
532 enum nvdimm_fwa_capability cap;
534 if (!nd_desc->fw_ops)
539 nvdimm_bus_lock(dev);
540 cap = nd_desc->fw_ops->capability(nd_desc);
541 nvdimm_bus_unlock(dev);
543 if (cap < NVDIMM_FWA_CAP_QUIESCE)
549 static const struct attribute_group nvdimm_firmware_attribute_group = {
551 .attrs = nvdimm_firmware_attributes,
552 .is_visible = nvdimm_firmware_visible,
555 static const struct attribute_group *nvdimm_attribute_groups[] = {
556 &nd_device_attribute_group,
557 &nvdimm_attribute_group,
558 &nvdimm_firmware_attribute_group,
562 static const struct device_type nvdimm_device_type = {
564 .release = nvdimm_release,
565 .groups = nvdimm_attribute_groups,
568 bool is_nvdimm(struct device *dev)
570 return dev->type == &nvdimm_device_type;
573 struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus,
574 void *provider_data, const struct attribute_group **groups,
575 unsigned long flags, unsigned long cmd_mask, int num_flush,
576 struct resource *flush_wpq, const char *dimm_id,
577 const struct nvdimm_security_ops *sec_ops,
578 const struct nvdimm_fw_ops *fw_ops)
580 struct nvdimm *nvdimm = kzalloc(sizeof(*nvdimm), GFP_KERNEL);
586 nvdimm->id = ida_simple_get(&dimm_ida, 0, 0, GFP_KERNEL);
587 if (nvdimm->id < 0) {
592 nvdimm->dimm_id = dimm_id;
593 nvdimm->provider_data = provider_data;
594 nvdimm->flags = flags;
595 nvdimm->cmd_mask = cmd_mask;
596 nvdimm->num_flush = num_flush;
597 nvdimm->flush_wpq = flush_wpq;
598 atomic_set(&nvdimm->busy, 0);
600 dev_set_name(dev, "nmem%d", nvdimm->id);
601 dev->parent = &nvdimm_bus->dev;
602 dev->type = &nvdimm_device_type;
603 dev->devt = MKDEV(nvdimm_major, nvdimm->id);
604 dev->groups = groups;
605 nvdimm->sec.ops = sec_ops;
606 nvdimm->fw_ops = fw_ops;
607 nvdimm->sec.overwrite_tmo = 0;
608 INIT_DELAYED_WORK(&nvdimm->dwork, nvdimm_security_overwrite_query);
610 * Security state must be initialized before device_add() for
611 * attribute visibility.
613 /* get security state and extended (master) state */
614 nvdimm->sec.flags = nvdimm_security_flags(nvdimm, NVDIMM_USER);
615 nvdimm->sec.ext_flags = nvdimm_security_flags(nvdimm, NVDIMM_MASTER);
616 nd_device_register(dev);
620 EXPORT_SYMBOL_GPL(__nvdimm_create);
622 void nvdimm_delete(struct nvdimm *nvdimm)
624 struct device *dev = &nvdimm->dev;
625 bool dev_put = false;
627 /* We are shutting down. Make state frozen artificially. */
628 nvdimm_bus_lock(dev);
629 set_bit(NVDIMM_SECURITY_FROZEN, &nvdimm->sec.flags);
630 if (test_and_clear_bit(NDD_WORK_PENDING, &nvdimm->flags))
632 nvdimm_bus_unlock(dev);
633 cancel_delayed_work_sync(&nvdimm->dwork);
636 nd_device_unregister(dev, ND_SYNC);
638 EXPORT_SYMBOL_GPL(nvdimm_delete);
640 static void shutdown_security_notify(void *data)
642 struct nvdimm *nvdimm = data;
644 sysfs_put(nvdimm->sec.overwrite_state);
647 int nvdimm_security_setup_events(struct device *dev)
649 struct nvdimm *nvdimm = to_nvdimm(dev);
651 if (!nvdimm->sec.flags || !nvdimm->sec.ops
652 || !nvdimm->sec.ops->overwrite)
654 nvdimm->sec.overwrite_state = sysfs_get_dirent(dev->kobj.sd, "security");
655 if (!nvdimm->sec.overwrite_state)
658 return devm_add_action_or_reset(dev, shutdown_security_notify, nvdimm);
660 EXPORT_SYMBOL_GPL(nvdimm_security_setup_events);
662 int nvdimm_in_overwrite(struct nvdimm *nvdimm)
664 return test_bit(NDD_SECURITY_OVERWRITE, &nvdimm->flags);
666 EXPORT_SYMBOL_GPL(nvdimm_in_overwrite);
668 int nvdimm_security_freeze(struct nvdimm *nvdimm)
672 WARN_ON_ONCE(!is_nvdimm_bus_locked(&nvdimm->dev));
674 if (!nvdimm->sec.ops || !nvdimm->sec.ops->freeze)
677 if (!nvdimm->sec.flags)
680 if (test_bit(NDD_SECURITY_OVERWRITE, &nvdimm->flags)) {
681 dev_warn(&nvdimm->dev, "Overwrite operation in progress.\n");
685 rc = nvdimm->sec.ops->freeze(nvdimm);
686 nvdimm->sec.flags = nvdimm_security_flags(nvdimm, NVDIMM_USER);
691 static unsigned long dpa_align(struct nd_region *nd_region)
693 struct device *dev = &nd_region->dev;
695 if (dev_WARN_ONCE(dev, !is_nvdimm_bus_locked(dev),
696 "bus lock required for capacity provision\n"))
698 if (dev_WARN_ONCE(dev, !nd_region->ndr_mappings || nd_region->align
699 % nd_region->ndr_mappings,
700 "invalid region align %#lx mappings: %d\n",
701 nd_region->align, nd_region->ndr_mappings))
703 return nd_region->align / nd_region->ndr_mappings;
707 * nd_pmem_max_contiguous_dpa - For the given dimm+region, return the max
708 * contiguous unallocated dpa range.
709 * @nd_region: constrain available space check to this reference region
710 * @nd_mapping: container of dpa-resource-root + labels
712 resource_size_t nd_pmem_max_contiguous_dpa(struct nd_region *nd_region,
713 struct nd_mapping *nd_mapping)
715 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
716 struct nvdimm_bus *nvdimm_bus;
717 resource_size_t max = 0;
718 struct resource *res;
721 /* if a dimm is disabled the available capacity is zero */
725 align = dpa_align(nd_region);
729 nvdimm_bus = walk_to_nvdimm_bus(ndd->dev);
730 if (__reserve_free_pmem(&nd_region->dev, nd_mapping->nvdimm))
732 for_each_dpa_resource(ndd, res) {
733 resource_size_t start, end;
735 if (strcmp(res->name, "pmem-reserve") != 0)
737 /* trim free space relative to current alignment setting */
738 start = ALIGN(res->start, align);
739 end = ALIGN_DOWN(res->end + 1, align) - 1;
742 if (end - start + 1 > max)
743 max = end - start + 1;
745 release_free_pmem(nvdimm_bus, nd_mapping);
750 * nd_pmem_available_dpa - for the given dimm+region account unallocated dpa
751 * @nd_mapping: container of dpa-resource-root + labels
752 * @nd_region: constrain available space check to this reference region
754 * Validate that a PMEM label, if present, aligns with the start of an
757 resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region,
758 struct nd_mapping *nd_mapping)
760 struct nvdimm_drvdata *ndd = to_ndd(nd_mapping);
761 resource_size_t map_start, map_end, busy = 0;
762 struct resource *res;
768 align = dpa_align(nd_region);
772 map_start = nd_mapping->start;
773 map_end = map_start + nd_mapping->size - 1;
774 for_each_dpa_resource(ndd, res) {
775 resource_size_t start, end;
777 start = ALIGN_DOWN(res->start, align);
778 end = ALIGN(res->end + 1, align) - 1;
779 if (start >= map_start && start < map_end) {
781 nd_dbg_dpa(nd_region, ndd, res,
782 "misaligned to iset\n");
785 busy += end - start + 1;
786 } else if (end >= map_start && end <= map_end) {
787 busy += end - start + 1;
788 } else if (map_start > start && map_start < end) {
789 /* total eclipse of the mapping */
790 busy += nd_mapping->size;
794 if (busy < nd_mapping->size)
795 return ALIGN_DOWN(nd_mapping->size - busy, align);
799 void nvdimm_free_dpa(struct nvdimm_drvdata *ndd, struct resource *res)
801 WARN_ON_ONCE(!is_nvdimm_bus_locked(ndd->dev));
803 __release_region(&ndd->dpa, res->start, resource_size(res));
806 struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd,
807 struct nd_label_id *label_id, resource_size_t start,
810 char *name = kmemdup(label_id, sizeof(*label_id), GFP_KERNEL);
811 struct resource *res;
816 WARN_ON_ONCE(!is_nvdimm_bus_locked(ndd->dev));
817 res = __request_region(&ndd->dpa, start, n, name, 0);
824 * nvdimm_allocated_dpa - sum up the dpa currently allocated to this label_id
825 * @nvdimm: container of dpa-resource-root + labels
826 * @label_id: dpa resource name of the form pmem-<human readable uuid>
828 resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd,
829 struct nd_label_id *label_id)
831 resource_size_t allocated = 0;
832 struct resource *res;
834 for_each_dpa_resource(ndd, res)
835 if (strcmp(res->name, label_id->id) == 0)
836 allocated += resource_size(res);
841 static int count_dimms(struct device *dev, void *c)
850 int nvdimm_bus_check_dimm_count(struct nvdimm_bus *nvdimm_bus, int dimm_count)
853 /* Flush any possible dimm registration failures */
856 device_for_each_child(&nvdimm_bus->dev, &count, count_dimms);
857 dev_dbg(&nvdimm_bus->dev, "count: %d\n", count);
858 if (count != dimm_count)
862 EXPORT_SYMBOL_GPL(nvdimm_bus_check_dimm_count);
864 void __exit nvdimm_devs_exit(void)
866 ida_destroy(&dimm_ida);