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[J-linux.git] / include / xen / acpi.h
1 /******************************************************************************
2  * acpi.h
3  * acpi file for domain 0 kernel
4  *
5  * Copyright (c) 2011 Konrad Rzeszutek Wilk <[email protected]>
6  * Copyright (c) 2011 Yu Ke <[email protected]>
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 */
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