LXR linux/include/linux/dca.h

   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 */
  13void dca_register_notify(struct notifier_block *nb);
  14void dca_unregister_notify(struct notifier_block *nb);
  15
  16#define DCA_PROVIDER_ADD     0x0001
  17#define DCA_PROVIDER_REMOVE  0x0002
  18
  19struct dca_provider {
  20        struct list_head        node;
  21        const struct dca_ops    *ops;
  22        struct device           *cd;
  23        int                      id;
  24};
  25
  26struct dca_domain {
  27        struct list_head        node;
  28        struct list_head        dca_providers;
  29        struct pci_bus          *pci_rc;
  30};
  31
  32struct 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
  40struct dca_provider *alloc_dca_provider(const struct dca_ops *ops,
  41                                        int priv_size);
  42void free_dca_provider(struct dca_provider *dca);
  43int register_dca_provider(struct dca_provider *dca, struct device *dev);
  44void unregister_dca_provider(struct dca_provider *dca, struct device *dev);
  45
  46static 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
  53int dca_add_requester(struct device *dev);
  54int dca_remove_requester(struct device *dev);
  55u8 dca_get_tag(int cpu);
  56u8 dca3_get_tag(struct device *dev, int cpu);
  57
  58/* internal stuff */
  59int __init dca_sysfs_init(void);
  60void __exit dca_sysfs_exit(void);
  61int dca_sysfs_add_provider(struct dca_provider *dca, struct device *dev);
  62void dca_sysfs_remove_provider(struct dca_provider *dca);
  63int dca_sysfs_add_req(struct dca_provider *dca, struct device *dev, int slot);
  64void dca_sysfs_remove_req(struct dca_provider *dca, int slot);
  65
  66#endif /* DCA_H */
  67