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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 - 2012, 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_xrupt_handler
58 *
59 * PARAMETERS: Context - Calling Context
60 *
61 * RETURN: Status code indicates whether interrupt was handled.
62 *
63 * DESCRIPTION: Interrupt handler that will figure out what function or
64 * control method to call to deal with a SCI.
65 *
66 ******************************************************************************/
67
68static u32 ACPI_SYSTEM_XFACE acpi_ev_sci_xrupt_handler(void *context)
69{
70 struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
71 u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
72
73 ACPI_FUNCTION_TRACE(ev_sci_xrupt_handler);
74
75 /*
76 * We are guaranteed by the ACPI CA initialization/shutdown code that
77 * if this interrupt handler is installed, ACPI is enabled.
78 */
79
80 /*
81 * Fixed Events:
82 * Check for and dispatch any Fixed Events that have occurred
83 */
84 interrupt_handled |= acpi_ev_fixed_event_detect();
85
86 /*
87 * General Purpose Events:
88 * Check for and dispatch any GPEs that have occurred
89 */
90 interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
91
92 return_UINT32(interrupt_handled);
93}
94
95/*******************************************************************************
96 *
97 * FUNCTION: acpi_ev_gpe_xrupt_handler
98 *
99 * PARAMETERS: Context - Calling Context
100 *
101 * RETURN: Status code indicates whether interrupt was handled.
102 *
103 * DESCRIPTION: Handler for GPE Block Device interrupts
104 *
105 ******************************************************************************/
106
107u32 ACPI_SYSTEM_XFACE acpi_ev_gpe_xrupt_handler(void *context)
108{
109 struct acpi_gpe_xrupt_info *gpe_xrupt_list = context;
110 u32 interrupt_handled = ACPI_INTERRUPT_NOT_HANDLED;
111
112 ACPI_FUNCTION_TRACE(ev_gpe_xrupt_handler);
113
114 /*
115 * We are guaranteed by the ACPI CA initialization/shutdown code that
116 * if this interrupt handler is installed, ACPI is enabled.
117 */
118
119 /* GPEs: Check for and dispatch any GPEs that have occurred */
120
121 interrupt_handled |= acpi_ev_gpe_detect(gpe_xrupt_list);
122
123 return_UINT32(interrupt_handled);
124}
125
126/******************************************************************************
127 *
128 * FUNCTION: acpi_ev_install_sci_handler
129 *
130 * PARAMETERS: none
131 *
132 * RETURN: Status
133 *
134 * DESCRIPTION: Installs SCI handler.
135 *
136 ******************************************************************************/
137
138u32 acpi_ev_install_sci_handler(void)
139{
140 u32 status = AE_OK;
141
142 ACPI_FUNCTION_TRACE(ev_install_sci_handler);
143
144 status =
145 acpi_os_install_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
146 acpi_ev_sci_xrupt_handler,
147 acpi_gbl_gpe_xrupt_list_head);
148 return_ACPI_STATUS(status);
149}
150
151/******************************************************************************
152 *
153 * FUNCTION: acpi_ev_remove_sci_handler
154 *
155 * PARAMETERS: none
156 *
157 * RETURN: E_OK if handler uninstalled OK, E_ERROR if handler was not
158 * installed to begin with
159 *
160 * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be
161 * taken.
162 *
163 * Note: It doesn't seem important to disable all events or set the event
164 * enable registers to their original values. The OS should disable
165 * the SCI interrupt level when the handler is removed, so no more
166 * events will come in.
167 *
168 ******************************************************************************/
169
170acpi_status acpi_ev_remove_sci_handler(void)
171{
172 acpi_status status;
173
174 ACPI_FUNCTION_TRACE(ev_remove_sci_handler);
175
176 /* Just let the OS remove the handler and disable the level */
177
178 status =
179 acpi_os_remove_interrupt_handler((u32) acpi_gbl_FADT.sci_interrupt,
180 acpi_ev_sci_xrupt_handler);
181
182 return_ACPI_STATUS(status);
183}
184
185#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 - 2014, 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 ACPI CA 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 */