1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
4 */
5 #ifndef DCA_H
6 #define DCA_H
7
8 #include <linux/pci.h>
9
10 /* DCA Provider API */
11
12 /* DCA Notifier Interface */
13 void dca_register_notify(struct notifier_block *nb);
14 void dca_unregister_notify(struct notifier_block *nb);
15
16 #define DCA_PROVIDER_ADD 0x0001
17 #define DCA_PROVIDER_REMOVE 0x0002
18
19 struct dca_provider {
20 struct list_head node;
21 const struct dca_ops *ops;
22 struct device *cd;
23 int id;
24 };
25
26 struct dca_domain {
27 struct list_head node;
28 struct list_head dca_providers;
29 struct pci_bus *pci_rc;
30 };
31
32 struct dca_ops {
33 int (*add_requester) (struct dca_provider *, struct device *);
34 int (*remove_requester) (struct dca_provider *, struct device *);
35 u8 (*get_tag) (struct dca_provider *, struct device *,
36 int cpu);
37 int (*dev_managed) (struct dca_provider *, struct device *);
38 };
39
40 struct dca_provider *alloc_dca_provider(const struct dca_ops *ops,
41 int priv_size);
42 void free_dca_provider(struct dca_provider *dca);
43 int register_dca_provider(struct dca_provider *dca, struct device *dev);
44 void unregister_dca_provider(struct dca_provider *dca, struct device *dev);
45
46 static inline void *dca_priv(struct dca_provider *dca)
47 {
48 return (void *)dca + sizeof(struct dca_provider);
49 }
50
51 /* Requester API */
52 #define DCA_GET_TAG_TWO_ARGS
53 int dca_add_requester(struct device *dev);
54 int dca_remove_requester(struct device *dev);
55 u8 dca_get_tag(int cpu);
56 u8 dca3_get_tag(struct device *dev, int cpu);
57
58 /* internal stuff */
59 int __init dca_sysfs_init(void);
60 void __exit dca_sysfs_exit(void);
61 int dca_sysfs_add_provider(struct dca_provider *dca, struct device *dev);
62 void dca_sysfs_remove_provider(struct dca_provider *dca);
63 int dca_sysfs_add_req(struct dca_provider *dca, struct device *dev, int slot);
64 void dca_sysfs_remove_req(struct dca_provider *dca, int slot);
65
66 #endif /* DCA_H */
67
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