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Erik Schmauss95857632018-03-14 16:13:07 -07001// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*******************************************************************************
3 *
4 * Module Name: evsci - System Control Interrupt configuration and
5 * legacy to ACPI mode state transition functions
6 *
7 ******************************************************************************/
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050010#include "accommon.h"
11#include "acevents.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#define _COMPONENT ACPI_EVENTS
Len Brown4be44fc2005-08-05 00:44:28 -040014ACPI_MODULE_NAME("evsci")
Bob Moore33620c52012-02-14 18:14:27 +080015#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
Robert Moore44f6c012005-04-18 22:49:35 -040016/* Local prototypes */
Len Brown4be44fc2005-08-05 00:44:28 -040017static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context);
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19/*******************************************************************************
20 *
Lv Zhenga2fd4b42013-09-23 09:52:05 +080021 * FUNCTION: acpi_ev_sci_dispatch
22 *
23 * PARAMETERS: None
24 *
25 * RETURN: Status code indicates whether interrupt was handled.
26 *
27 * DESCRIPTION: Dispatch the SCI to all host-installed SCI handlers.
28 *
29 ******************************************************************************/
30
31u32 acpi_ev_sci_dispatch(void)
32{
33 struct acpi_sci_handler_info *sci_handler;
34 acpi_cpu_flags flags;
35 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
36
37 ACPI_FUNCTION_NAME(ev_sci_dispatch);
38
39 /* Are there any host-installed SCI handlers? */
40
41 if (!acpi_gbl_sci_handler_list) {
42 return (int_status);
43 }
44
45 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
46
47 /* Invoke all host-installed SCI handlers */
48
49 sci_handler = acpi_gbl_sci_handler_list;
50 while (sci_handler) {
51
52 /* Invoke the installed handler (at interrupt level) */
53
Bob Moorec53ae3a2013-09-23 09:52:45 +080054 int_status |= sci_handler->address(sci_handler->context);
Lv Zhenga2fd4b42013-09-23 09:52:05 +080055
56 sci_handler = sci_handler->next;
57 }
58
59 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
60 return (int_status);
61}
62
63/*******************************************************************************
64 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 * FUNCTION: acpi_ev_sci_xrupt_handler
66 *
Bob Mooreba494be2012-07-12 09:40:10 +080067 * PARAMETERS: context - Calling Context
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 *
69 * RETURN: Status code indicates whether interrupt was handled.
70 *
71 * DESCRIPTION: Interrupt handler that will figure out what function or
72 * control method to call to deal with a SCI.
73 *
74 ******************************************************************************/
75
Len Brown4be44fc2005-08-05 00:44:28 -040076static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077{
Len Brown4be44fc2005-08-05 00:44:28 -040078 struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
79 u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -070080
Bob Mooreb229cf92006-04-21 17:15:00 -040081 ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 /*
Bob Moore6085bb12014-04-04 12:37:11 +080084 * We are guaranteed by the ACPICA initialization/shutdown code that
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 * if this interrupt handler is installed, ACPI is enabled.
86 */
87
88 /*
89 * Fixed Events:
90 * Check for and dispatch any Fixed Events that have occurred
91 */
Len Brown4be44fc2005-08-05 00:44:28 -040092 interrupt_handled |= acpi_ev_fixed_event_detect();
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
94 /*
95 * General Purpose Events:
96 * Check for and dispatch any GPEs that have occurred
97 */
Len Brown4be44fc2005-08-05 00:44:28 -040098 interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800100 /* Invoke all host-installed SCI handlers */
101
102 interrupt_handled |= acpi_ev_sci_dispatch();
103
Lv Zheng9187a412013-10-31 09:30:28 +0800104 acpi_sci_count++;
Bob Moorefd1af712013-03-08 09:22:23 +0000105 return_UINT32(interrupt_handled);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106}
107
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108/*******************************************************************************
109 *
110 * FUNCTION: acpi_ev_gpe_xrupt_handler
111 *
Bob Mooreba494be2012-07-12 09:40:10 +0800112 * PARAMETERS: context - Calling Context
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 *
114 * RETURN: Status code indicates whether interrupt was handled.
115 *
116 * DESCRIPTION: Handler for GPE Block Device interrupts
117 *
118 ******************************************************************************/
119
Len Brown4be44fc2005-08-05 00:44:28 -0400120u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121{
Len Brown4be44fc2005-08-05 00:44:28 -0400122 struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
123 u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Bob Mooreb229cf92006-04-21 17:15:00 -0400125 ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 /*
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800128 * We are guaranteed by the ACPICA initialization/shutdown code that
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 * if this interrupt handler is installed, ACPI is enabled.
130 */
131
Bob Moore9f15fc62008-11-12 16:01:56 +0800132 /* GPEs: Check for and dispatch any GPEs that have occurred */
133
Len Brown4be44fc2005-08-05 00:44:28 -0400134 interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
Bob Moorefd1af712013-03-08 09:22:23 +0000135 return_UINT32(interrupt_handled);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136}
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138/******************************************************************************
139 *
140 * FUNCTION: acpi_ev_install_sci_handler
141 *
142 * PARAMETERS: none
143 *
144 * RETURN: Status
145 *
146 * DESCRIPTION: Installs SCI handler.
147 *
148 ******************************************************************************/
149
Len Brown4be44fc2005-08-05 00:44:28 -0400150u32 acpi_ev_install_sci_handler(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151{
Len Brown4be44fc2005-08-05 00:44:28 -0400152 u32 status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
Bob Mooreb229cf92006-04-21 17:15:00 -0400154 ACPI_FUNCTION_TRACE(ev_install_sci_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Bob Mooref3d2e782007-02-02 19:48:18 +0300156 status =
157 acpi_os_install_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
158 acpi_ev_sci_xrupt_handler,
159 acpi_gbl_gpe_xrupt_list_head);
Len Brown4be44fc2005-08-05 00:44:28 -0400160 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161}
162
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163/******************************************************************************
164 *
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800165 * FUNCTION: acpi_ev_remove_all_sci_handlers
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 *
167 * PARAMETERS: none
168 *
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800169 * RETURN: AE_OK if handler uninstalled, AE_ERROR if handler was not
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 * installed to begin with
171 *
Bob Moore9f15fc62008-11-12 16:01:56 +0800172 * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800173 * taken. Remove all host-installed SCI handlers.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 *
175 * Note: It doesn't seem important to disable all events or set the event
Bob Moore9f15fc62008-11-12 16:01:56 +0800176 * enable registers to their original values. The OS should disable
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 * the SCI interrupt level when the handler is removed, so no more
178 * events will come in.
179 *
180 ******************************************************************************/
181
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800182acpi_status acpi_ev_remove_all_sci_handlers(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183{
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800184 struct acpi_sci_handler_info *sci_handler;
185 acpi_cpu_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400186 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800188 ACPI_FUNCTION_TRACE(ev_remove_all_sci_handlers);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190 /* Just let the OS remove the handler and disable the level */
191
Bob Mooref3d2e782007-02-02 19:48:18 +0300192 status =
193 acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
194 acpi_ev_sci_xrupt_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800196 if (!acpi_gbl_sci_handler_list) {
197 return (status);
198 }
199
200 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
201
202 /* Free all host-installed SCI handlers */
203
204 while (acpi_gbl_sci_handler_list) {
205 sci_handler = acpi_gbl_sci_handler_list;
206 acpi_gbl_sci_handler_list = sci_handler->next;
207 ACPI_FREE(sci_handler);
208 }
209
210 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
Len Brown4be44fc2005-08-05 00:44:28 -0400211 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212}
Bob Moore33620c52012-02-14 18:14:27 +0800213
214#endif /* !ACPI_REDUCED_HARDWARE */