include/linux/dca.h

   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
  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 */