1 /*
2  * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License as published by the Free
6  * Software Foundation; either version 2 of the License, or (at your option)
7  * any later version.
8  *
9  * This program is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12  * more details.
13  *
14  * You should have received a copy of the GNU General Public License along with
15  * this program; if not, write to the Free Software Foundation, Inc., 59
16  * Temple Place - Suite 330, Boston, MA  02111-1307, USA.
17  *
18  * The full GNU General Public License is included in this distribution in the
19  * file called COPYING.
20  */
21 #ifndef DCA_H
22 #define DCA_H
23 
24 #include <linux/pci.h>
25 
26 /* DCA Provider API */
27 
28 /* DCA Notifier Interface */
29 void dca_register_notify(struct notifier_block *nb);
30 void dca_unregister_notify(struct notifier_block *nb);
31 
32 #define DCA_PROVIDER_ADD     0x0001
33 #define DCA_PROVIDER_REMOVE  0x0002
34 
35 struct dca_provider {
36 	struct list_head	node;
37 	const struct dca_ops	*ops;
38 	struct device 		*cd;
39 	int			 id;
40 };
41 
42 struct dca_domain {
43 	struct list_head	node;
44 	struct list_head	dca_providers;
45 	struct pci_bus		*pci_rc;
46 };
47 
48 struct dca_ops {
49 	int	(*add_requester)    (struct dca_provider *, struct device *);
50 	int	(*remove_requester) (struct dca_provider *, struct device *);
51 	u8	(*get_tag)	    (struct dca_provider *, struct device *,
52 				     int cpu);
53 	int	(*dev_managed)      (struct dca_provider *, struct device *);
54 };
55 
56 struct dca_provider *alloc_dca_provider(const struct dca_ops *ops,
57 					int priv_size);
58 void free_dca_provider(struct dca_provider *dca);
59 int register_dca_provider(struct dca_provider *dca, struct device *dev);
60 void unregister_dca_provider(struct dca_provider *dca, struct device *dev);
61 
dca_priv(struct dca_provider * dca)62 static inline void *dca_priv(struct dca_provider *dca)
63 {
64 	return (void *)dca + sizeof(struct dca_provider);
65 }
66 
67 /* Requester API */
68 #define DCA_GET_TAG_TWO_ARGS
69 int dca_add_requester(struct device *dev);
70 int dca_remove_requester(struct device *dev);
71 u8 dca_get_tag(int cpu);
72 u8 dca3_get_tag(struct device *dev, int cpu);
73 
74 /* internal stuff */
75 int __init dca_sysfs_init(void);
76 void __exit dca_sysfs_exit(void);
77 int dca_sysfs_add_provider(struct dca_provider *dca, struct device *dev);
78 void dca_sysfs_remove_provider(struct dca_provider *dca);
79 int dca_sysfs_add_req(struct dca_provider *dca, struct device *dev, int slot);
80 void dca_sysfs_remove_req(struct dca_provider *dca, int slot);
81 
82 #endif /* DCA_H */
83