LXR linux/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 */
  29void dca_register_notify(struct notifier_block *nb);
  30void dca_unregister_notify(struct notifier_block *nb);
  31
  32#define DCA_PROVIDER_ADD     0x0001
  33#define DCA_PROVIDER_REMOVE  0x0002
  34
  35struct dca_provider {
  36        struct list_head        node;
  37        const struct dca_ops    *ops;
  38        struct device           *cd;
  39        int                      id;
  40};
  41
  42struct dca_domain {
  43        struct list_head        node;
  44        struct list_head        dca_providers;
  45        struct pci_bus          *pci_rc;
  46};
  47
  48struct 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
  56struct dca_provider *alloc_dca_provider(const struct dca_ops *ops,
  57                                        int priv_size);
  58void free_dca_provider(struct dca_provider *dca);
  59int register_dca_provider(struct dca_provider *dca, struct device *dev);
  60void unregister_dca_provider(struct dca_provider *dca, struct device *dev);
  61
  62static 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
  69int dca_add_requester(struct device *dev);
  70int dca_remove_requester(struct device *dev);
  71u8 dca_get_tag(int cpu);
  72u8 dca3_get_tag(struct device *dev, int cpu);
  73
  74/* internal stuff */
  75int __init dca_sysfs_init(void);
  76void __exit dca_sysfs_exit(void);
  77int dca_sysfs_add_provider(struct dca_provider *dca, struct device *dev);
  78void dca_sysfs_remove_provider(struct dca_provider *dca);
  79int dca_sysfs_add_req(struct dca_provider *dca, struct device *dev, int slot);
  80void dca_sysfs_remove_req(struct dca_provider *dca, int slot);
  81
  82#endif /* DCA_H */
  83