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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/drivers/nvdimm/nd-core.h
....@@ -1,27 +1,20 @@
1
+/* SPDX-License-Identifier: GPL-2.0-only */
12 /*
23  * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of version 2 of the GNU General Public License as
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- * published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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- * General Public License for more details.
124  */
135 #ifndef __ND_CORE_H__
146 #define __ND_CORE_H__
157 #include <linux/libnvdimm.h>
168 #include <linux/device.h>
17
-#include <linux/libnvdimm.h>
189 #include <linux/sizes.h>
1910 #include <linux/mutex.h>
2011 #include <linux/nd.h>
12
+#include "nd.h"
2113 
2214 extern struct list_head nvdimm_bus_list;
2315 extern struct mutex nvdimm_bus_list_mutex;
2416 extern int nvdimm_major;
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+extern struct workqueue_struct *nvdimm_wq;
2518 
2619 struct nvdimm_bus {
2720 	struct nvdimm_bus_descriptor *nd_desc;
....@@ -43,7 +36,51 @@
4336 	atomic_t busy;
4437 	int id, num_flush;
4538 	struct resource *flush_wpq;
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+	const char *dimm_id;
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+	struct {
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+		const struct nvdimm_security_ops *ops;
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+		unsigned long flags;
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+		unsigned long ext_flags;
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+		unsigned int overwrite_tmo;
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+		struct kernfs_node *overwrite_state;
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+	} sec;
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+	struct delayed_work dwork;
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+	const struct nvdimm_fw_ops *fw_ops;
4649 };
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+
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+static inline unsigned long nvdimm_security_flags(
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+		struct nvdimm *nvdimm, enum nvdimm_passphrase_type ptype)
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+{
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+	u64 flags;
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+	const u64 state_flags = 1UL << NVDIMM_SECURITY_DISABLED
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+		| 1UL << NVDIMM_SECURITY_LOCKED
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+		| 1UL << NVDIMM_SECURITY_UNLOCKED
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+		| 1UL << NVDIMM_SECURITY_OVERWRITE;
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+
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+	if (!nvdimm->sec.ops)
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+		return 0;
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+
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+	flags = nvdimm->sec.ops->get_flags(nvdimm, ptype);
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+	/* disabled, locked, unlocked, and overwrite are mutually exclusive */
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+	dev_WARN_ONCE(&nvdimm->dev, hweight64(flags & state_flags) > 1,
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+			"reported invalid security state: %#llx\n",
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+			(unsigned long long) flags);
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+	return flags;
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+}
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+int nvdimm_security_freeze(struct nvdimm *nvdimm);
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+#if IS_ENABLED(CONFIG_NVDIMM_KEYS)
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+ssize_t nvdimm_security_store(struct device *dev, const char *buf, size_t len);
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+void nvdimm_security_overwrite_query(struct work_struct *work);
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+#else
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+static inline ssize_t nvdimm_security_store(struct device *dev,
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+		const char *buf, size_t len)
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+{
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+	return -EOPNOTSUPP;
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+}
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+static inline void nvdimm_security_overwrite_query(struct work_struct *work)
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+{
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+}
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+#endif
4784 
4885 /**
4986  * struct blk_alloc_info - tracking info for BLK dpa scanning
....@@ -78,22 +115,16 @@
78115 int __init nvdimm_bus_init(void);
79116 void nvdimm_bus_exit(void);
80117 void nvdimm_devs_exit(void);
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-void nd_region_devs_exit(void);
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-void nd_region_probe_success(struct nvdimm_bus *nvdimm_bus, struct device *dev);
83118 struct nd_region;
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+void nd_region_advance_seeds(struct nd_region *nd_region, struct device *dev);
84120 void nd_region_create_ns_seed(struct nd_region *nd_region);
85121 void nd_region_create_btt_seed(struct nd_region *nd_region);
86122 void nd_region_create_pfn_seed(struct nd_region *nd_region);
87123 void nd_region_create_dax_seed(struct nd_region *nd_region);
88
-void nd_region_disable(struct nvdimm_bus *nvdimm_bus, struct device *dev);
89124 int nvdimm_bus_create_ndctl(struct nvdimm_bus *nvdimm_bus);
90125 void nvdimm_bus_destroy_ndctl(struct nvdimm_bus *nvdimm_bus);
91126 void nd_synchronize(void);
92
-int nvdimm_bus_register_dimms(struct nvdimm_bus *nvdimm_bus);
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-int nvdimm_bus_register_regions(struct nvdimm_bus *nvdimm_bus);
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-int nvdimm_bus_init_interleave_sets(struct nvdimm_bus *nvdimm_bus);
95127 void __nd_device_register(struct device *dev);
96
-int nd_match_dimm(struct device *dev, void *data);
97128 struct nd_label_id;
98129 char *nd_label_gen_id(struct nd_label_id *label_id, u8 *uuid, u32 flags);
99130 bool nd_is_uuid_unique(struct device *dev, u8 *uuid);
....@@ -134,4 +165,88 @@
134165 		struct nd_namespace_common **_ndns, const char *buf,
135166 		size_t len);
136167 struct nd_pfn *to_nd_pfn_safe(struct device *dev);
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+bool is_nvdimm_bus(struct device *dev);
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+
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+#if IS_ENABLED(CONFIG_ND_CLAIM)
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+int devm_nsio_enable(struct device *dev, struct nd_namespace_io *nsio,
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+		resource_size_t size);
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+void devm_nsio_disable(struct device *dev, struct nd_namespace_io *nsio);
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+#else
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+static inline int devm_nsio_enable(struct device *dev,
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+		struct nd_namespace_io *nsio, resource_size_t size)
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+{
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+	return -ENXIO;
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+}
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+
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+static inline void devm_nsio_disable(struct device *dev,
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+		struct nd_namespace_io *nsio)
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+{
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+}
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+#endif
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+
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+#ifdef CONFIG_PROVE_LOCKING
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+extern struct class *nd_class;
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+
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+enum {
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+	LOCK_BUS,
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+	LOCK_NDCTL,
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+	LOCK_REGION,
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+	LOCK_DIMM = LOCK_REGION,
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+	LOCK_NAMESPACE,
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+	LOCK_CLAIM,
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+};
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+
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+static inline void debug_nvdimm_lock(struct device *dev)
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+{
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+	if (is_nd_region(dev))
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+		mutex_lock_nested(&dev->lockdep_mutex, LOCK_REGION);
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+	else if (is_nvdimm(dev))
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+		mutex_lock_nested(&dev->lockdep_mutex, LOCK_DIMM);
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+	else if (is_nd_btt(dev) || is_nd_pfn(dev) || is_nd_dax(dev))
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+		mutex_lock_nested(&dev->lockdep_mutex, LOCK_CLAIM);
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+	else if (dev->parent && (is_nd_region(dev->parent)))
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+		mutex_lock_nested(&dev->lockdep_mutex, LOCK_NAMESPACE);
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+	else if (is_nvdimm_bus(dev))
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+		mutex_lock_nested(&dev->lockdep_mutex, LOCK_BUS);
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+	else if (dev->class && dev->class == nd_class)
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+		mutex_lock_nested(&dev->lockdep_mutex, LOCK_NDCTL);
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+	else
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+		dev_WARN(dev, "unknown lock level\n");
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+}
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+
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+static inline void debug_nvdimm_unlock(struct device *dev)
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+{
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+	mutex_unlock(&dev->lockdep_mutex);
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+}
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+
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+static inline void nd_device_lock(struct device *dev)
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+{
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+	device_lock(dev);
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+	debug_nvdimm_lock(dev);
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+}
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+
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+static inline void nd_device_unlock(struct device *dev)
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+{
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+	debug_nvdimm_unlock(dev);
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+	device_unlock(dev);
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+}
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+#else
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+static inline void nd_device_lock(struct device *dev)
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+{
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+	device_lock(dev);
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+}
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+
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+static inline void nd_device_unlock(struct device *dev)
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+{
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+	device_unlock(dev);
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+}
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+
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+static inline void debug_nvdimm_lock(struct device *dev)
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+{
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+}
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+
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+static inline void debug_nvdimm_unlock(struct device *dev)
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+{
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+}
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+#endif
137252 #endif /* __ND_CORE_H__ */