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 */
  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 */