1/******************************************************************************
  2 * acpi.h
  3 * acpi file for domain 0 kernel
  4 *
  5 * Copyright (c) 2011 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
  6 * Copyright (c) 2011 Yu Ke <ke.yu@intel.com>
  7 *
  8 * This program is free software; you can redistribute it and/or
  9 * modify it under the terms of the GNU General Public License version 2
 10 * as published by the Free Software Foundation; or, when distributed
 11 * separately from the Linux kernel or incorporated into other
 12 * software packages, subject to the following license:
 13 *
 14 * Permission is hereby granted, free of charge, to any person obtaining a copy
 15 * of this source file (the "Software"), to deal in the Software without
 16 * restriction, including without limitation the rights to use, copy, modify,
 17 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
 18 * and to permit persons to whom the Software is furnished to do so, subject to
 19 * the following conditions:
 20 *
 21 * The above copyright notice and this permission notice shall be included in
 22 * all copies or substantial portions of the Software.
 23 *
 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 27 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 29 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 30 * IN THE SOFTWARE.
 31 */
 32
 33#ifndef _XEN_ACPI_H
 34#define _XEN_ACPI_H
 35
 36#include <linux/types.h>
 37
 38typedef int (*get_gsi_from_sbdf_t)(u32 sbdf);
 39
 40#ifdef CONFIG_XEN_DOM0
 41#include <asm/xen/hypervisor.h>
 42#include <xen/xen.h>
 43#include <linux/acpi.h>
 44
 45int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
 46				     u32 pm1a_cnt, u32 pm1b_cnd);
 47int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
 48				     u32 val_a, u32 val_b);
 49
 50static inline int xen_acpi_suspend_lowlevel(void)
 51{
 52	/*
 53	* Xen will save and restore CPU context, so
 54	* we can skip that and just go straight to
 55	* the suspend.
 56	*/
 57	acpi_enter_sleep_state(ACPI_STATE_S3);
 58	return 0;
 59}
 60
 61static inline void xen_acpi_sleep_register(void)
 62{
 63	if (xen_initial_domain()) {
 64		acpi_os_set_prepare_sleep(
 65			&xen_acpi_notify_hypervisor_sleep);
 66		acpi_os_set_prepare_extended_sleep(
 67			&xen_acpi_notify_hypervisor_extended_sleep);
 68
 69		acpi_suspend_lowlevel = xen_acpi_suspend_lowlevel;
 70	}
 71}
 72int xen_pvh_setup_gsi(int gsi, int trigger, int polarity);
 73int xen_acpi_get_gsi_info(struct pci_dev *dev,
 74						  int *gsi_out,
 75						  int *trigger_out,
 76						  int *polarity_out);
 77void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func);
 78int xen_acpi_get_gsi_from_sbdf(u32 sbdf);
 79#else
 80static inline void xen_acpi_sleep_register(void)
 81{
 82}
 83
 84static inline int xen_pvh_setup_gsi(int gsi, int trigger, int polarity)
 85{
 86	return -1;
 87}
 88
 89static inline int xen_acpi_get_gsi_info(struct pci_dev *dev,
 90						  int *gsi_out,
 91						  int *trigger_out,
 92						  int *polarity_out)
 93{
 94	return -1;
 95}
 96
 97static inline void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func)
 98{
 99}
100
101static inline int xen_acpi_get_gsi_from_sbdf(u32 sbdf)
102{
103	return -1;
104}
105#endif
106
107#endif	/* _XEN_ACPI_H */