drivers/misc/vmw_vmci/vmci_doorbell.h

   1 /*
   2  * VMware VMCI Driver
   3  *
   4  * Copyright (C) 2012 VMware, Inc. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation version 2 and no later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #ifndef VMCI_DOORBELL_H
  17 #define VMCI_DOORBELL_H
  18
  19 #include <linux/vmw_vmci_defs.h>
  20 #include <linux/types.h>
  21
  22 #include "vmci_driver.h"
  23
  24 /*
  25  * VMCINotifyResourceInfo: Used to create and destroy doorbells, and
  26  * generate a notification for a doorbell or queue pair.
  27  */
  28 struct vmci_dbell_notify_resource_info {
  29         struct vmci_handle handle;
  30         u16 resource;
  31         u16 action;
  32         s32 result;
  33 };
  34
  35 /*
  36  * Structure used for checkpointing the doorbell mappings. It is
  37  * written to the checkpoint as is, so changing this structure will
  38  * break checkpoint compatibility.
  39  */
  40 struct dbell_cpt_state {
  41         struct vmci_handle handle;
  42         u64 bitmap_idx;
  43 };
  44
  45 int vmci_dbell_host_context_notify(u32 src_cid, struct vmci_handle handle);
  46 int vmci_dbell_get_priv_flags(struct vmci_handle handle, u32 *priv_flags);
  47
  48 bool vmci_dbell_register_notification_bitmap(u64 bitmap_ppn);
  49 void vmci_dbell_scan_notification_entries(u8 *bitmap);
  50
  51 #endif /* VMCI_DOORBELL_H */