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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/*******************************************************************************
3 *
4 * Module Name: evsci - System Control Interrupt configuration and
5 * legacy to ACPI mode state transition functions
6 *
7 ******************************************************************************/
8
9#include <acpi/acpi.h>
10#include "accommon.h"
11#include "acevents.h"
12
13#define _COMPONENT ACPI_EVENTS
14ACPI_MODULE_NAME("evsci")
15#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
16/* Local prototypes */
17static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context);
18
19/*******************************************************************************
20 *
21 * 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
54 int_status |= sci_handler->address(sci_handler->context);
55
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 *
65 * FUNCTION: acpi_ev_sci_xrupt_handler
66 *
67 * PARAMETERS: context - Calling Context
68 *
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
76static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context)
77{
78 struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
79 u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
80
81 ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler);
82
83 /*
84 * We are guaranteed by the ACPICA initialization/shutdown code that
85 * 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 */
92 interrupt_handled |= acpi_ev_fixed_event_detect();
93
94 /*
95 * General Purpose Events:
96 * Check for and dispatch any GPEs that have occurred
97 */
98 interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
99
100 /* Invoke all host-installed SCI handlers */
101
102 interrupt_handled |= acpi_ev_sci_dispatch();
103
104 acpi_sci_count++;
105 return_UINT32(interrupt_handled);
106}
107
108/*******************************************************************************
109 *
110 * FUNCTION: acpi_ev_gpe_xrupt_handler
111 *
112 * PARAMETERS: context - Calling Context
113 *
114 * RETURN: Status code indicates whether interrupt was handled.
115 *
116 * DESCRIPTION: Handler for GPE Block Device interrupts
117 *
118 ******************************************************************************/
119
120u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context)
121{
122 struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
123 u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
124
125 ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler);
126
127 /*
128 * We are guaranteed by the ACPICA initialization/shutdown code that
129 * if this interrupt handler is installed, ACPI is enabled.
130 */
131
132 /* GPEs: Check for and dispatch any GPEs that have occurred */
133
134 interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
135 return_UINT32(interrupt_handled);
136}
137
138/******************************************************************************
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
150u32 acpi_ev_install_sci_handler(void)
151{
152 u32 status = AE_OK;
153
154 ACPI_FUNCTION_TRACE(ev_install_sci_handler);
155
156 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);
160 return_ACPI_STATUS(status);
161}
162
163/******************************************************************************
164 *
165 * FUNCTION: acpi_ev_remove_all_sci_handlers
166 *
167 * PARAMETERS: none
168 *
169 * RETURN: AE_OK if handler uninstalled, AE_ERROR if handler was not
170 * installed to begin with
171 *
172 * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be
173 * taken. Remove all host-installed SCI handlers.
174 *
175 * Note: It doesn't seem important to disable all events or set the event
176 * enable registers to their original values. The OS should disable
177 * the SCI interrupt level when the handler is removed, so no more
178 * events will come in.
179 *
180 ******************************************************************************/
181
182acpi_status acpi_ev_remove_all_sci_handlers(void)
183{
184 struct acpi_sci_handler_info *sci_handler;
185 acpi_cpu_flags flags;
186 acpi_status status;
187
188 ACPI_FUNCTION_TRACE(ev_remove_all_sci_handlers);
189
190 /* Just let the OS remove the handler and disable the level */
191
192 status =
193 acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
194 acpi_ev_sci_xrupt_handler);
195
196 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);
211 return_ACPI_STATUS(status);
212}
213
214#endif /* !ACPI_REDUCED_HARDWARE */
1/*******************************************************************************
2 *
3 * Module Name: evsci - System Control Interrupt configuration and
4 * legacy to ACPI mode state transition functions
5 *
6 ******************************************************************************/
7
8/*
9 * Copyright (C) 2000 - 2016, Intel Corp.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45#include <acpi/acpi.h>
46#include "accommon.h"
47#include "acevents.h"
48
49#define _COMPONENT ACPI_EVENTS
50ACPI_MODULE_NAME("evsci")
51#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
52/* Local prototypes */
53static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context);
54
55/*******************************************************************************
56 *
57 * FUNCTION: acpi_ev_sci_dispatch
58 *
59 * PARAMETERS: None
60 *
61 * RETURN: Status code indicates whether interrupt was handled.
62 *
63 * DESCRIPTION: Dispatch the SCI to all host-installed SCI handlers.
64 *
65 ******************************************************************************/
66
67u32 acpi_ev_sci_dispatch(void)
68{
69 struct acpi_sci_handler_info *sci_handler;
70 acpi_cpu_flags flags;
71 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
72
73 ACPI_FUNCTION_NAME(ev_sci_dispatch);
74
75 /* Are there any host-installed SCI handlers? */
76
77 if (!acpi_gbl_sci_handler_list) {
78 return (int_status);
79 }
80
81 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
82
83 /* Invoke all host-installed SCI handlers */
84
85 sci_handler = acpi_gbl_sci_handler_list;
86 while (sci_handler) {
87
88 /* Invoke the installed handler (at interrupt level) */
89
90 int_status |= sci_handler->address(sci_handler->context);
91
92 sci_handler = sci_handler->next;
93 }
94
95 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
96 return (int_status);
97}
98
99/*******************************************************************************
100 *
101 * FUNCTION: acpi_ev_sci_xrupt_handler
102 *
103 * PARAMETERS: context - Calling Context
104 *
105 * RETURN: Status code indicates whether interrupt was handled.
106 *
107 * DESCRIPTION: Interrupt handler that will figure out what function or
108 * control method to call to deal with a SCI.
109 *
110 ******************************************************************************/
111
112static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context)
113{
114 struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
115 u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
116
117 ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler);
118
119 /*
120 * We are guaranteed by the ACPICA initialization/shutdown code that
121 * if this interrupt handler is installed, ACPI is enabled.
122 */
123
124 /*
125 * Fixed Events:
126 * Check for and dispatch any Fixed Events that have occurred
127 */
128 interrupt_handled |= acpi_ev_fixed_event_detect();
129
130 /*
131 * General Purpose Events:
132 * Check for and dispatch any GPEs that have occurred
133 */
134 interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
135
136 /* Invoke all host-installed SCI handlers */
137
138 interrupt_handled |= acpi_ev_sci_dispatch();
139
140 acpi_sci_count++;
141 return_UINT32(interrupt_handled);
142}
143
144/*******************************************************************************
145 *
146 * FUNCTION: acpi_ev_gpe_xrupt_handler
147 *
148 * PARAMETERS: context - Calling Context
149 *
150 * RETURN: Status code indicates whether interrupt was handled.
151 *
152 * DESCRIPTION: Handler for GPE Block Device interrupts
153 *
154 ******************************************************************************/
155
156u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context)
157{
158 struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
159 u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
160
161 ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler);
162
163 /*
164 * We are guaranteed by the ACPICA initialization/shutdown code that
165 * if this interrupt handler is installed, ACPI is enabled.
166 */
167
168 /* GPEs: Check for and dispatch any GPEs that have occurred */
169
170 interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
171 return_UINT32(interrupt_handled);
172}
173
174/******************************************************************************
175 *
176 * FUNCTION: acpi_ev_install_sci_handler
177 *
178 * PARAMETERS: none
179 *
180 * RETURN: Status
181 *
182 * DESCRIPTION: Installs SCI handler.
183 *
184 ******************************************************************************/
185
186u32 acpi_ev_install_sci_handler(void)
187{
188 u32 status = AE_OK;
189
190 ACPI_FUNCTION_TRACE(ev_install_sci_handler);
191
192 status =
193 acpi_os_install_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
194 acpi_ev_sci_xrupt_handler,
195 acpi_gbl_gpe_xrupt_list_head);
196 return_ACPI_STATUS(status);
197}
198
199/******************************************************************************
200 *
201 * FUNCTION: acpi_ev_remove_all_sci_handlers
202 *
203 * PARAMETERS: none
204 *
205 * RETURN: AE_OK if handler uninstalled, AE_ERROR if handler was not
206 * installed to begin with
207 *
208 * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be
209 * taken. Remove all host-installed SCI handlers.
210 *
211 * Note: It doesn't seem important to disable all events or set the event
212 * enable registers to their original values. The OS should disable
213 * the SCI interrupt level when the handler is removed, so no more
214 * events will come in.
215 *
216 ******************************************************************************/
217
218acpi_status acpi_ev_remove_all_sci_handlers(void)
219{
220 struct acpi_sci_handler_info *sci_handler;
221 acpi_cpu_flags flags;
222 acpi_status status;
223
224 ACPI_FUNCTION_TRACE(ev_remove_all_sci_handlers);
225
226 /* Just let the OS remove the handler and disable the level */
227
228 status =
229 acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
230 acpi_ev_sci_xrupt_handler);
231
232 if (!acpi_gbl_sci_handler_list) {
233 return (status);
234 }
235
236 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
237
238 /* Free all host-installed SCI handlers */
239
240 while (acpi_gbl_sci_handler_list) {
241 sci_handler = acpi_gbl_sci_handler_list;
242 acpi_gbl_sci_handler_list = sci_handler->next;
243 ACPI_FREE(sci_handler);
244 }
245
246 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
247 return_ACPI_STATUS(status);
248}
249
250#endif /* !ACPI_REDUCED_HARDWARE */