include/xen/acpi.h

   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
  38 typedef 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
  45 int xen_acpi_notify_hypervisor_sleep(u8 sleep_state,
  46                                      u32 pm1a_cnt, u32 pm1b_cnd);
  47 int xen_acpi_notify_hypervisor_extended_sleep(u8 sleep_state,
  48                                      u32 val_a, u32 val_b);
  49
  50 static 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
  61 static 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 }
  72 int xen_pvh_setup_gsi(int gsi, int trigger, int polarity);
  73 int xen_acpi_get_gsi_info(struct pci_dev *dev,
  74                                                   int *gsi_out,
  75                                                   int *trigger_out,
  76                                                   int *polarity_out);
  77 void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func);
  78 int xen_acpi_get_gsi_from_sbdf(u32 sbdf);
  79 #else
  80 static inline void xen_acpi_sleep_register(void)
  81 {
  82 }
  83
  84 static inline int xen_pvh_setup_gsi(int gsi, int trigger, int polarity)
  85 {
  86         return -1;
  87 }
  88
  89 static 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
  97 static inline void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func)
  98 {
  99 }
 100
 101 static inline int xen_acpi_get_gsi_from_sbdf(u32 sbdf)
 102 {
 103         return -1;
 104 }
 105 #endif
 106
 107 #endif  /* _XEN_ACPI_H */