Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sleep.c - ACPI sleep support. |
| 3 | * |
Alexey Starikovskiy | e2a5b42 | 2005-03-18 16:20:46 -0500 | [diff] [blame] | 4 | * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com> |
| 6 | * Copyright (c) 2000-2003 Patrick Mochel |
| 7 | * Copyright (c) 2003 Open Source Development Lab |
| 8 | * |
| 9 | * This file is released under the GPLv2. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <linux/delay.h> |
| 14 | #include <linux/irq.h> |
| 15 | #include <linux/dmi.h> |
| 16 | #include <linux/device.h> |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 17 | #include <linux/interrupt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/suspend.h> |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 19 | #include <linux/reboot.h> |
H. Peter Anvin | d1ee433 | 2011-02-14 15:42:46 -0800 | [diff] [blame] | 20 | #include <linux/acpi.h> |
Lin Ming | a2ef5c4 | 2012-03-21 10:58:46 +0800 | [diff] [blame] | 21 | #include <linux/module.h> |
Sudeep Holla | 504997c | 2016-02-17 12:03:23 +0000 | [diff] [blame] | 22 | #include <linux/syscore_ops.h> |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 23 | #include <asm/io.h> |
Todd E Brandt | bb3632c | 2014-06-06 05:40:17 -0700 | [diff] [blame] | 24 | #include <trace/events/power.h> |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 25 | |
Bjorn Helgaas | e60cc7a | 2009-03-13 12:08:26 -0600 | [diff] [blame] | 26 | #include "internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "sleep.h" |
| 28 | |
Chen Yu | 1373718 | 2016-03-22 08:51:10 +0800 | [diff] [blame] | 29 | /* |
| 30 | * Some HW-full platforms do not have _S5, so they may need |
| 31 | * to leverage efi power off for a shutdown. |
| 32 | */ |
| 33 | bool acpi_no_s5; |
Stephen Hemminger | 01eac60 | 2010-10-18 18:47:25 -0700 | [diff] [blame] | 34 | static u8 sleep_states[ACPI_S_STATE_COUNT]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 36 | static void acpi_sleep_tts_switch(u32 acpi_state) |
| 37 | { |
Jiang Liu | 0db9820 | 2013-06-29 00:24:39 +0800 | [diff] [blame] | 38 | acpi_status status; |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 39 | |
Jiang Liu | 0db9820 | 2013-06-29 00:24:39 +0800 | [diff] [blame] | 40 | status = acpi_execute_simple_method(NULL, "\\_TTS", acpi_state); |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 41 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 42 | /* |
| 43 | * OS can't evaluate the _TTS object correctly. Some warning |
| 44 | * message will be printed. But it won't break anything. |
| 45 | */ |
| 46 | printk(KERN_NOTICE "Failure in evaluating _TTS object\n"); |
| 47 | } |
| 48 | } |
| 49 | |
Rafael J. Wysocki | 9713adc | 2016-11-21 14:25:49 +0100 | [diff] [blame] | 50 | static int tts_notify_reboot(struct notifier_block *this, |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 51 | unsigned long code, void *x) |
| 52 | { |
| 53 | acpi_sleep_tts_switch(ACPI_STATE_S5); |
| 54 | return NOTIFY_DONE; |
| 55 | } |
| 56 | |
Rafael J. Wysocki | 9713adc | 2016-11-21 14:25:49 +0100 | [diff] [blame] | 57 | static struct notifier_block tts_notifier = { |
| 58 | .notifier_call = tts_notify_reboot, |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 59 | .next = NULL, |
| 60 | .priority = 0, |
| 61 | }; |
| 62 | |
Rafael J. Wysocki | c9b6c8f | 2008-01-08 00:10:57 +0100 | [diff] [blame] | 63 | static int acpi_sleep_prepare(u32 acpi_state) |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 64 | { |
| 65 | #ifdef CONFIG_ACPI_SLEEP |
| 66 | /* do we have a wakeup address for S2 and S3? */ |
| 67 | if (acpi_state == ACPI_STATE_S3) { |
H. Peter Anvin | 319b6ff | 2012-05-30 12:33:41 +0300 | [diff] [blame] | 68 | if (!acpi_wakeup_address) |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 69 | return -EFAULT; |
Rafael J. Wysocki | e3e9b57 | 2016-01-04 22:05:20 +0100 | [diff] [blame] | 70 | acpi_set_waking_vector(acpi_wakeup_address); |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 71 | |
| 72 | } |
| 73 | ACPI_FLUSH_CPU_CACHE(); |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 74 | #endif |
Rafael J. Wysocki | c9b6c8f | 2008-01-08 00:10:57 +0100 | [diff] [blame] | 75 | printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n", |
| 76 | acpi_state); |
Rafael J. Wysocki | 78f5f02 | 2010-07-06 22:09:38 -0400 | [diff] [blame] | 77 | acpi_enable_wakeup_devices(acpi_state); |
Alexey Starikovskiy | 2f3f2226 | 2007-09-24 14:33:21 +0200 | [diff] [blame] | 78 | acpi_enter_sleep_state_prep(acpi_state); |
| 79 | return 0; |
| 80 | } |
| 81 | |
Rafael J. Wysocki | a4e90be | 2014-03-13 22:11:39 +0100 | [diff] [blame] | 82 | static bool acpi_sleep_state_supported(u8 sleep_state) |
| 83 | { |
| 84 | acpi_status status; |
| 85 | u8 type_a, type_b; |
| 86 | |
| 87 | status = acpi_get_sleep_type_data(sleep_state, &type_a, &type_b); |
| 88 | return ACPI_SUCCESS(status) && (!acpi_gbl_reduced_hardware |
| 89 | || (acpi_gbl_FADT.sleep_control.address |
| 90 | && acpi_gbl_FADT.sleep_status.address)); |
| 91 | } |
| 92 | |
Rafael J. Wysocki | 5d1e072 | 2008-10-22 14:58:43 -0400 | [diff] [blame] | 93 | #ifdef CONFIG_ACPI_SLEEP |
Jan Beulich | 091aad6 | 2010-12-07 14:52:25 +0000 | [diff] [blame] | 94 | static u32 acpi_target_sleep_state = ACPI_STATE_S0; |
Rafael J. Wysocki | a6ae759 | 2012-11-02 01:40:53 +0100 | [diff] [blame] | 95 | |
| 96 | u32 acpi_target_system_state(void) |
| 97 | { |
| 98 | return acpi_target_sleep_state; |
| 99 | } |
Rafael J. Wysocki | fad16dd | 2014-05-08 23:22:15 +0200 | [diff] [blame] | 100 | EXPORT_SYMBOL_GPL(acpi_target_system_state); |
Rafael J. Wysocki | a6ae759 | 2012-11-02 01:40:53 +0100 | [diff] [blame] | 101 | |
Rafael J. Wysocki | a5ca734 | 2012-07-23 21:01:02 +0200 | [diff] [blame] | 102 | static bool pwr_btn_event_pending; |
Jan Beulich | 091aad6 | 2010-12-07 14:52:25 +0000 | [diff] [blame] | 103 | |
Zhang Rui | d7f0eea | 2009-12-30 15:36:42 +0800 | [diff] [blame] | 104 | /* |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 105 | * The ACPI specification wants us to save NVS memory regions during hibernation |
| 106 | * and to restore them during the subsequent resume. Windows does that also for |
| 107 | * suspend to RAM. However, it is known that this mechanism does not work on |
| 108 | * all machines, so we allow the user to disable it with the help of the |
| 109 | * 'acpi_sleep=nonvs' kernel command line option. |
| 110 | */ |
| 111 | static bool nvs_nosave; |
| 112 | |
| 113 | void __init acpi_nvs_nosave(void) |
| 114 | { |
| 115 | nvs_nosave = true; |
| 116 | } |
| 117 | |
| 118 | /* |
Kristen Carlson Accardi | 1bad2f1 | 2012-10-26 13:39:15 +0200 | [diff] [blame] | 119 | * The ACPI specification wants us to save NVS memory regions during hibernation |
| 120 | * but says nothing about saving NVS during S3. Not all versions of Windows |
| 121 | * save NVS on S3 suspend either, and it is clear that not all systems need |
| 122 | * NVS to be saved at S3 time. To improve suspend/resume time, allow the |
| 123 | * user to disable saving NVS on S3 if their system does not require it, but |
| 124 | * continue to save/restore NVS for S4 as specified. |
| 125 | */ |
| 126 | static bool nvs_nosave_s3; |
| 127 | |
| 128 | void __init acpi_nvs_nosave_s3(void) |
| 129 | { |
| 130 | nvs_nosave_s3 = true; |
| 131 | } |
| 132 | |
Zhang Rui | cbc00c1 | 2017-01-16 10:55:45 +0800 | [diff] [blame] | 133 | static int __init init_nvs_save_s3(const struct dmi_system_id *d) |
| 134 | { |
| 135 | nvs_nosave_s3 = false; |
| 136 | return 0; |
| 137 | } |
| 138 | |
Kristen Carlson Accardi | 1bad2f1 | 2012-10-26 13:39:15 +0200 | [diff] [blame] | 139 | /* |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 140 | * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the |
| 141 | * user to request that behavior by using the 'acpi_old_suspend_ordering' |
| 142 | * kernel command line option that causes the following variable to be set. |
| 143 | */ |
| 144 | static bool old_suspend_ordering; |
| 145 | |
| 146 | void __init acpi_old_suspend_ordering(void) |
| 147 | { |
| 148 | old_suspend_ordering = true; |
| 149 | } |
| 150 | |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 151 | static int __init init_old_suspend_ordering(const struct dmi_system_id *d) |
| 152 | { |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 153 | acpi_old_suspend_ordering(); |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 154 | return 0; |
| 155 | } |
| 156 | |
Rafael J. Wysocki | 5399864 | 2010-09-24 16:46:14 -0400 | [diff] [blame] | 157 | static int __init init_nvs_nosave(const struct dmi_system_id *d) |
| 158 | { |
| 159 | acpi_nvs_nosave(); |
| 160 | return 0; |
| 161 | } |
| 162 | |
Rafael J. Wysocki | 71630b7 | 2017-11-06 23:56:57 +0100 | [diff] [blame] | 163 | static bool acpi_sleep_no_lps0; |
| 164 | |
| 165 | static int __init init_no_lps0(const struct dmi_system_id *d) |
| 166 | { |
| 167 | acpi_sleep_no_lps0 = true; |
| 168 | return 0; |
| 169 | } |
| 170 | |
Christoph Hellwig | 6faadbb | 2017-09-14 11:59:30 +0200 | [diff] [blame] | 171 | static const struct dmi_system_id acpisleep_dmi_table[] __initconst = { |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 172 | { |
| 173 | .callback = init_old_suspend_ordering, |
| 174 | .ident = "Abit KN9 (nForce4 variant)", |
| 175 | .matches = { |
| 176 | DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"), |
| 177 | DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"), |
| 178 | }, |
| 179 | }, |
Rafael J. Wysocki | 4fb507b | 2008-10-14 22:54:06 +0200 | [diff] [blame] | 180 | { |
| 181 | .callback = init_old_suspend_ordering, |
| 182 | .ident = "HP xw4600 Workstation", |
| 183 | .matches = { |
| 184 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), |
| 185 | DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"), |
| 186 | }, |
| 187 | }, |
Rafael J. Wysocki | 65df784 | 2008-11-26 17:53:13 -0500 | [diff] [blame] | 188 | { |
Andy Whitcroft | a140449 | 2009-02-11 18:11:22 +0000 | [diff] [blame] | 189 | .callback = init_old_suspend_ordering, |
| 190 | .ident = "Asus Pundit P1-AH2 (M2N8L motherboard)", |
| 191 | .matches = { |
| 192 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTek Computer INC."), |
| 193 | DMI_MATCH(DMI_BOARD_NAME, "M2N8L"), |
| 194 | }, |
| 195 | }, |
Zhang Rui | 45e7798 | 2009-03-15 22:13:44 -0400 | [diff] [blame] | 196 | { |
Zhao Yakui | 2a9ef8e | 2009-03-18 16:36:25 +0800 | [diff] [blame] | 197 | .callback = init_old_suspend_ordering, |
| 198 | .ident = "Panasonic CF51-2L", |
| 199 | .matches = { |
| 200 | DMI_MATCH(DMI_BOARD_VENDOR, |
| 201 | "Matsushita Electric Industrial Co.,Ltd."), |
| 202 | DMI_MATCH(DMI_BOARD_NAME, "CF51-2L"), |
| 203 | }, |
| 204 | }, |
Rafael J. Wysocki | 5399864 | 2010-09-24 16:46:14 -0400 | [diff] [blame] | 205 | { |
| 206 | .callback = init_nvs_nosave, |
Joseph Salisbury | 66f2fda | 2013-02-05 00:16:29 +0000 | [diff] [blame] | 207 | .ident = "Sony Vaio VGN-FW41E_H", |
| 208 | .matches = { |
| 209 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 210 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW41E_H"), |
| 211 | }, |
| 212 | }, |
| 213 | { |
| 214 | .callback = init_nvs_nosave, |
Dave Jones | d11c78e97 | 2011-10-19 23:15:11 +0200 | [diff] [blame] | 215 | .ident = "Sony Vaio VGN-FW21E", |
| 216 | .matches = { |
| 217 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 218 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21E"), |
| 219 | }, |
| 220 | }, |
| 221 | { |
| 222 | .callback = init_nvs_nosave, |
Fabio Valentini | 469dd1c | 2013-03-11 19:16:34 +0000 | [diff] [blame] | 223 | .ident = "Sony Vaio VGN-FW21M", |
| 224 | .matches = { |
| 225 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 226 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW21M"), |
| 227 | }, |
| 228 | }, |
| 229 | { |
| 230 | .callback = init_nvs_nosave, |
Dave Jones | ddf6ce4 | 2011-11-03 00:58:59 +0100 | [diff] [blame] | 231 | .ident = "Sony Vaio VPCEB17FX", |
| 232 | .matches = { |
| 233 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 234 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB17FX"), |
| 235 | }, |
| 236 | }, |
| 237 | { |
| 238 | .callback = init_nvs_nosave, |
Rafael J. Wysocki | 5399864 | 2010-09-24 16:46:14 -0400 | [diff] [blame] | 239 | .ident = "Sony Vaio VGN-SR11M", |
| 240 | .matches = { |
| 241 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 242 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR11M"), |
| 243 | }, |
| 244 | }, |
| 245 | { |
| 246 | .callback = init_nvs_nosave, |
| 247 | .ident = "Everex StepNote Series", |
| 248 | .matches = { |
| 249 | DMI_MATCH(DMI_SYS_VENDOR, "Everex Systems, Inc."), |
| 250 | DMI_MATCH(DMI_PRODUCT_NAME, "Everex StepNote Series"), |
| 251 | }, |
| 252 | }, |
Rafael J. Wysocki | af48931 | 2010-10-17 21:01:21 +0200 | [diff] [blame] | 253 | { |
| 254 | .callback = init_nvs_nosave, |
| 255 | .ident = "Sony Vaio VPCEB1Z1E", |
| 256 | .matches = { |
| 257 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 258 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1Z1E"), |
| 259 | }, |
| 260 | }, |
Rafael J. Wysocki | 291a73c | 2010-12-12 21:10:42 +0100 | [diff] [blame] | 261 | { |
| 262 | .callback = init_nvs_nosave, |
| 263 | .ident = "Sony Vaio VGN-NW130D", |
| 264 | .matches = { |
| 265 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 266 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-NW130D"), |
| 267 | }, |
| 268 | }, |
Rafael J. Wysocki | 7b33070 | 2011-01-06 23:37:01 +0100 | [diff] [blame] | 269 | { |
| 270 | .callback = init_nvs_nosave, |
Lan Tianyu | 93f7708 | 2012-01-21 09:23:56 +0800 | [diff] [blame] | 271 | .ident = "Sony Vaio VPCCW29FX", |
| 272 | .matches = { |
| 273 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 274 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCCW29FX"), |
| 275 | }, |
| 276 | }, |
| 277 | { |
| 278 | .callback = init_nvs_nosave, |
Rafael J. Wysocki | 7b33070 | 2011-01-06 23:37:01 +0100 | [diff] [blame] | 279 | .ident = "Averatec AV1020-ED2", |
| 280 | .matches = { |
| 281 | DMI_MATCH(DMI_SYS_VENDOR, "AVERATEC"), |
| 282 | DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"), |
| 283 | }, |
| 284 | }, |
Zhang Rui | bb0c5ed | 2011-07-30 01:40:48 -0400 | [diff] [blame] | 285 | { |
| 286 | .callback = init_old_suspend_ordering, |
| 287 | .ident = "Asus A8N-SLI DELUXE", |
| 288 | .matches = { |
| 289 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| 290 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"), |
| 291 | }, |
| 292 | }, |
| 293 | { |
| 294 | .callback = init_old_suspend_ordering, |
| 295 | .ident = "Asus A8N-SLI Premium", |
| 296 | .matches = { |
| 297 | DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."), |
| 298 | DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"), |
| 299 | }, |
| 300 | }, |
Rafael J. Wysocki | 89e8ea1 | 2011-10-06 20:35:03 +0200 | [diff] [blame] | 301 | { |
| 302 | .callback = init_nvs_nosave, |
| 303 | .ident = "Sony Vaio VGN-SR26GN_P", |
| 304 | .matches = { |
| 305 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 306 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-SR26GN_P"), |
| 307 | }, |
| 308 | }, |
Bogdan Radulescu | 731b25a | 2011-10-06 20:35:12 +0200 | [diff] [blame] | 309 | { |
| 310 | .callback = init_nvs_nosave, |
Lan Tianyu | 876ab79 | 2012-11-21 23:12:12 +0100 | [diff] [blame] | 311 | .ident = "Sony Vaio VPCEB1S1E", |
| 312 | .matches = { |
| 313 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 314 | DMI_MATCH(DMI_PRODUCT_NAME, "VPCEB1S1E"), |
| 315 | }, |
| 316 | }, |
| 317 | { |
| 318 | .callback = init_nvs_nosave, |
Bogdan Radulescu | 731b25a | 2011-10-06 20:35:12 +0200 | [diff] [blame] | 319 | .ident = "Sony Vaio VGN-FW520F", |
| 320 | .matches = { |
| 321 | DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"), |
| 322 | DMI_MATCH(DMI_PRODUCT_NAME, "VGN-FW520F"), |
| 323 | }, |
| 324 | }, |
Keng-Yu Lin | 5a50a7c | 2011-12-02 00:04:23 +0100 | [diff] [blame] | 325 | { |
| 326 | .callback = init_nvs_nosave, |
| 327 | .ident = "Asus K54C", |
| 328 | .matches = { |
| 329 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), |
| 330 | DMI_MATCH(DMI_PRODUCT_NAME, "K54C"), |
| 331 | }, |
| 332 | }, |
| 333 | { |
| 334 | .callback = init_nvs_nosave, |
| 335 | .ident = "Asus K54HR", |
| 336 | .matches = { |
| 337 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."), |
| 338 | DMI_MATCH(DMI_PRODUCT_NAME, "K54HR"), |
| 339 | }, |
| 340 | }, |
Zhang Rui | cbc00c1 | 2017-01-16 10:55:45 +0800 | [diff] [blame] | 341 | /* |
| 342 | * https://bugzilla.kernel.org/show_bug.cgi?id=189431 |
| 343 | * Lenovo G50-45 is a platform later than 2012, but needs nvs memory |
| 344 | * saving during S3. |
| 345 | */ |
| 346 | { |
| 347 | .callback = init_nvs_save_s3, |
| 348 | .ident = "Lenovo G50-45", |
| 349 | .matches = { |
| 350 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
| 351 | DMI_MATCH(DMI_PRODUCT_NAME, "80E3"), |
| 352 | }, |
| 353 | }, |
Rafael J. Wysocki | 71630b7 | 2017-11-06 23:56:57 +0100 | [diff] [blame] | 354 | /* |
| 355 | * https://bugzilla.kernel.org/show_bug.cgi?id=196907 |
| 356 | * Some Dell XPS13 9360 cannot do suspend-to-idle using the Low Power |
| 357 | * S0 Idle firmware interface. |
| 358 | */ |
| 359 | { |
| 360 | .callback = init_no_lps0, |
| 361 | .ident = "Dell XPS13 9360", |
| 362 | .matches = { |
| 363 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 364 | DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9360"), |
| 365 | }, |
| 366 | }, |
Chen Yu | 855c1c2 | 2018-04-10 23:07:51 +0800 | [diff] [blame] | 367 | /* |
| 368 | * ThinkPad X1 Tablet(2016) cannot do suspend-to-idle using |
| 369 | * the Low Power S0 Idle firmware interface (see |
| 370 | * https://bugzilla.kernel.org/show_bug.cgi?id=199057). |
| 371 | */ |
| 372 | { |
| 373 | .callback = init_no_lps0, |
| 374 | .ident = "ThinkPad X1 Tablet(2016)", |
| 375 | .matches = { |
| 376 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
| 377 | DMI_MATCH(DMI_PRODUCT_NAME, "20GGA00L00"), |
| 378 | }, |
| 379 | }, |
Carlos Corbacho | e41fb7c | 2008-07-23 21:28:43 -0700 | [diff] [blame] | 380 | {}, |
| 381 | }; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 382 | |
Rafael J. Wysocki | 5704403 | 2017-11-15 02:16:55 +0100 | [diff] [blame] | 383 | static bool ignore_blacklist; |
| 384 | |
| 385 | void __init acpi_sleep_no_blacklist(void) |
| 386 | { |
| 387 | ignore_blacklist = true; |
| 388 | } |
| 389 | |
Jan Beulich | 8b691c9 | 2015-01-23 08:12:06 +0000 | [diff] [blame] | 390 | static void __init acpi_sleep_dmi_check(void) |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 391 | { |
Rafael J. Wysocki | 5704403 | 2017-11-15 02:16:55 +0100 | [diff] [blame] | 392 | if (ignore_blacklist) |
| 393 | return; |
| 394 | |
Andy Shevchenko | 9c0a30b6 | 2018-02-22 14:59:22 +0200 | [diff] [blame] | 395 | if (dmi_get_bios_year() >= 2012) |
Lan Tianyu | 821d6f0 | 2014-07-23 14:42:33 +0800 | [diff] [blame] | 396 | acpi_nvs_nosave_s3(); |
| 397 | |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 398 | dmi_check_system(acpisleep_dmi_table); |
| 399 | } |
| 400 | |
| 401 | /** |
| 402 | * acpi_pm_freeze - Disable the GPEs and suspend EC transactions. |
| 403 | */ |
| 404 | static int acpi_pm_freeze(void) |
| 405 | { |
| 406 | acpi_disable_all_gpes(); |
| 407 | acpi_os_wait_events_complete(); |
| 408 | acpi_ec_block_transactions(); |
| 409 | return 0; |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * acpi_pre_suspend - Enable wakeup devices, "freeze" EC and save NVS. |
| 414 | */ |
| 415 | static int acpi_pm_pre_suspend(void) |
| 416 | { |
| 417 | acpi_pm_freeze(); |
| 418 | return suspend_nvs_save(); |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * __acpi_pm_prepare - Prepare the platform to enter the target state. |
| 423 | * |
| 424 | * If necessary, set the firmware waking vector and do arch-specific |
| 425 | * nastiness to get the wakeup code to the waking vector. |
| 426 | */ |
| 427 | static int __acpi_pm_prepare(void) |
| 428 | { |
| 429 | int error = acpi_sleep_prepare(acpi_target_sleep_state); |
| 430 | if (error) |
| 431 | acpi_target_sleep_state = ACPI_STATE_S0; |
| 432 | |
| 433 | return error; |
| 434 | } |
| 435 | |
| 436 | /** |
| 437 | * acpi_pm_prepare - Prepare the platform to enter the target sleep |
| 438 | * state and disable the GPEs. |
| 439 | */ |
| 440 | static int acpi_pm_prepare(void) |
| 441 | { |
| 442 | int error = __acpi_pm_prepare(); |
| 443 | if (!error) |
| 444 | error = acpi_pm_pre_suspend(); |
| 445 | |
| 446 | return error; |
| 447 | } |
| 448 | |
| 449 | static int find_powerf_dev(struct device *dev, void *data) |
| 450 | { |
| 451 | struct acpi_device *device = to_acpi_device(dev); |
| 452 | const char *hid = acpi_device_hid(device); |
| 453 | |
| 454 | return !strcmp(hid, ACPI_BUTTON_HID_POWERF); |
| 455 | } |
| 456 | |
| 457 | /** |
| 458 | * acpi_pm_finish - Instruct the platform to leave a sleep state. |
| 459 | * |
| 460 | * This is called after we wake back up (or if entering the sleep state |
| 461 | * failed). |
| 462 | */ |
| 463 | static void acpi_pm_finish(void) |
| 464 | { |
| 465 | struct device *pwr_btn_dev; |
| 466 | u32 acpi_state = acpi_target_sleep_state; |
| 467 | |
| 468 | acpi_ec_unblock_transactions(); |
| 469 | suspend_nvs_free(); |
| 470 | |
| 471 | if (acpi_state == ACPI_STATE_S0) |
| 472 | return; |
| 473 | |
| 474 | printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n", |
| 475 | acpi_state); |
| 476 | acpi_disable_wakeup_devices(acpi_state); |
| 477 | acpi_leave_sleep_state(acpi_state); |
| 478 | |
| 479 | /* reset firmware waking vector */ |
Rafael J. Wysocki | e3e9b57 | 2016-01-04 22:05:20 +0100 | [diff] [blame] | 480 | acpi_set_waking_vector(0); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 481 | |
| 482 | acpi_target_sleep_state = ACPI_STATE_S0; |
| 483 | |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 484 | acpi_resume_power_resources(); |
| 485 | |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 486 | /* If we were woken with the fixed power button, provide a small |
| 487 | * hint to userspace in the form of a wakeup event on the fixed power |
| 488 | * button device (if it can be found). |
| 489 | * |
| 490 | * We delay the event generation til now, as the PM layer requires |
| 491 | * timekeeping to be running before we generate events. */ |
| 492 | if (!pwr_btn_event_pending) |
| 493 | return; |
| 494 | |
| 495 | pwr_btn_event_pending = false; |
| 496 | pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL, |
| 497 | find_powerf_dev); |
| 498 | if (pwr_btn_dev) { |
| 499 | pm_wakeup_event(pwr_btn_dev, 0); |
| 500 | put_device(pwr_btn_dev); |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | /** |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 505 | * acpi_pm_start - Start system PM transition. |
| 506 | */ |
| 507 | static void acpi_pm_start(u32 acpi_state) |
| 508 | { |
| 509 | acpi_target_sleep_state = acpi_state; |
| 510 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
| 511 | acpi_scan_lock_acquire(); |
| 512 | } |
| 513 | |
| 514 | /** |
| 515 | * acpi_pm_end - Finish up system PM transition. |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 516 | */ |
| 517 | static void acpi_pm_end(void) |
| 518 | { |
Hans de Goede | 8ece1d8 | 2017-04-30 22:54:16 +0200 | [diff] [blame] | 519 | acpi_turn_off_unused_power_resources(); |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 520 | acpi_scan_lock_release(); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 521 | /* |
| 522 | * This is necessary in case acpi_pm_finish() is not called during a |
| 523 | * failing transition to a sleep state. |
| 524 | */ |
| 525 | acpi_target_sleep_state = ACPI_STATE_S0; |
| 526 | acpi_sleep_tts_switch(acpi_target_sleep_state); |
| 527 | } |
| 528 | #else /* !CONFIG_ACPI_SLEEP */ |
| 529 | #define acpi_target_sleep_state ACPI_STATE_S0 |
Rafael J. Wysocki | 71630b7 | 2017-11-06 23:56:57 +0100 | [diff] [blame] | 530 | #define acpi_sleep_no_lps0 (false) |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 531 | static inline void acpi_sleep_dmi_check(void) {} |
| 532 | #endif /* CONFIG_ACPI_SLEEP */ |
| 533 | |
| 534 | #ifdef CONFIG_SUSPEND |
| 535 | static u32 acpi_suspend_states[] = { |
| 536 | [PM_SUSPEND_ON] = ACPI_STATE_S0, |
| 537 | [PM_SUSPEND_STANDBY] = ACPI_STATE_S1, |
| 538 | [PM_SUSPEND_MEM] = ACPI_STATE_S3, |
| 539 | [PM_SUSPEND_MAX] = ACPI_STATE_S5 |
| 540 | }; |
| 541 | |
| 542 | /** |
| 543 | * acpi_suspend_begin - Set the target system sleep state to the state |
| 544 | * associated with given @pm_state, if supported. |
| 545 | */ |
| 546 | static int acpi_suspend_begin(suspend_state_t pm_state) |
| 547 | { |
| 548 | u32 acpi_state = acpi_suspend_states[pm_state]; |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 549 | int error; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 550 | |
| 551 | error = (nvs_nosave || nvs_nosave_s3) ? 0 : suspend_nvs_alloc(); |
| 552 | if (error) |
| 553 | return error; |
| 554 | |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 555 | if (!sleep_states[acpi_state]) { |
| 556 | pr_err("ACPI does not support sleep state S%u\n", acpi_state); |
| 557 | return -ENOSYS; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 558 | } |
Rafael J. Wysocki | ef25ba0 | 2015-10-07 00:49:34 +0200 | [diff] [blame] | 559 | if (acpi_state > ACPI_STATE_S1) |
| 560 | pm_set_suspend_via_firmware(); |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 561 | |
| 562 | acpi_pm_start(acpi_state); |
| 563 | return 0; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 564 | } |
| 565 | |
| 566 | /** |
| 567 | * acpi_suspend_enter - Actually enter a sleep state. |
| 568 | * @pm_state: ignored |
| 569 | * |
| 570 | * Flush caches and go to sleep. For STR we have to call arch-specific |
| 571 | * assembly, which in turn call acpi_enter_sleep_state(). |
| 572 | * It's unfortunate, but it works. Please fix if you're feeling frisky. |
| 573 | */ |
| 574 | static int acpi_suspend_enter(suspend_state_t pm_state) |
| 575 | { |
| 576 | acpi_status status = AE_OK; |
| 577 | u32 acpi_state = acpi_target_sleep_state; |
| 578 | int error; |
| 579 | |
| 580 | ACPI_FLUSH_CPU_CACHE(); |
| 581 | |
Todd E Brandt | bb3632c | 2014-06-06 05:40:17 -0700 | [diff] [blame] | 582 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 583 | switch (acpi_state) { |
| 584 | case ACPI_STATE_S1: |
| 585 | barrier(); |
| 586 | status = acpi_enter_sleep_state(acpi_state); |
| 587 | break; |
| 588 | |
| 589 | case ACPI_STATE_S3: |
Konrad Rzeszutek Wilk | d6a77ea | 2013-05-14 17:09:16 +0000 | [diff] [blame] | 590 | if (!acpi_suspend_lowlevel) |
| 591 | return -ENOSYS; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 592 | error = acpi_suspend_lowlevel(); |
| 593 | if (error) |
| 594 | return error; |
| 595 | pr_info(PREFIX "Low-level resume complete\n"); |
Rafael J. Wysocki | ef25ba0 | 2015-10-07 00:49:34 +0200 | [diff] [blame] | 596 | pm_set_resume_via_firmware(); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 597 | break; |
| 598 | } |
Todd E Brandt | bb3632c | 2014-06-06 05:40:17 -0700 | [diff] [blame] | 599 | trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 600 | |
| 601 | /* This violates the spec but is required for bug compatibility. */ |
| 602 | acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1); |
| 603 | |
| 604 | /* Reprogram control registers */ |
| 605 | acpi_leave_sleep_state_prep(acpi_state); |
| 606 | |
| 607 | /* ACPI 3.0 specs (P62) says that it's the responsibility |
| 608 | * of the OSPM to clear the status bit [ implying that the |
| 609 | * POWER_BUTTON event should not reach userspace ] |
| 610 | * |
| 611 | * However, we do generate a small hint for userspace in the form of |
| 612 | * a wakeup event. We flag this condition for now and generate the |
| 613 | * event later, as we're currently too early in resume to be able to |
| 614 | * generate wakeup events. |
| 615 | */ |
| 616 | if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) { |
Al Stone | 51468a9 | 2013-11-20 15:45:51 -0700 | [diff] [blame] | 617 | acpi_event_status pwr_btn_status = ACPI_EVENT_FLAG_DISABLED; |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 618 | |
| 619 | acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status); |
| 620 | |
Lv Zheng | 18864cc | 2016-08-04 16:43:45 +0800 | [diff] [blame] | 621 | if (pwr_btn_status & ACPI_EVENT_FLAG_STATUS_SET) { |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 622 | acpi_clear_event(ACPI_EVENT_POWER_BUTTON); |
| 623 | /* Flag for later */ |
| 624 | pwr_btn_event_pending = true; |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | /* |
| 629 | * Disable and clear GPE status before interrupt is enabled. Some GPEs |
| 630 | * (like wakeup GPE) haven't handler, this can avoid such GPE misfire. |
| 631 | * acpi_leave_sleep_state will reenable specific GPEs later |
| 632 | */ |
| 633 | acpi_disable_all_gpes(); |
| 634 | /* Allow EC transactions to happen. */ |
Lv Zheng | c2b46d67 | 2016-08-03 16:01:36 +0800 | [diff] [blame] | 635 | acpi_ec_unblock_transactions(); |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 636 | |
| 637 | suspend_nvs_restore(); |
| 638 | |
| 639 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
| 640 | } |
| 641 | |
| 642 | static int acpi_suspend_state_valid(suspend_state_t pm_state) |
| 643 | { |
| 644 | u32 acpi_state; |
| 645 | |
| 646 | switch (pm_state) { |
| 647 | case PM_SUSPEND_ON: |
| 648 | case PM_SUSPEND_STANDBY: |
| 649 | case PM_SUSPEND_MEM: |
| 650 | acpi_state = acpi_suspend_states[pm_state]; |
| 651 | |
| 652 | return sleep_states[acpi_state]; |
| 653 | default: |
| 654 | return 0; |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | static const struct platform_suspend_ops acpi_suspend_ops = { |
| 659 | .valid = acpi_suspend_state_valid, |
| 660 | .begin = acpi_suspend_begin, |
| 661 | .prepare_late = acpi_pm_prepare, |
| 662 | .enter = acpi_suspend_enter, |
| 663 | .wake = acpi_pm_finish, |
| 664 | .end = acpi_pm_end, |
| 665 | }; |
| 666 | |
| 667 | /** |
| 668 | * acpi_suspend_begin_old - Set the target system sleep state to the |
| 669 | * state associated with given @pm_state, if supported, and |
| 670 | * execute the _PTS control method. This function is used if the |
| 671 | * pre-ACPI 2.0 suspend ordering has been requested. |
| 672 | */ |
| 673 | static int acpi_suspend_begin_old(suspend_state_t pm_state) |
| 674 | { |
| 675 | int error = acpi_suspend_begin(pm_state); |
| 676 | if (!error) |
| 677 | error = __acpi_pm_prepare(); |
| 678 | |
| 679 | return error; |
| 680 | } |
| 681 | |
| 682 | /* |
| 683 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has |
| 684 | * been requested. |
| 685 | */ |
| 686 | static const struct platform_suspend_ops acpi_suspend_ops_old = { |
| 687 | .valid = acpi_suspend_state_valid, |
| 688 | .begin = acpi_suspend_begin_old, |
| 689 | .prepare_late = acpi_pm_pre_suspend, |
| 690 | .enter = acpi_suspend_enter, |
| 691 | .wake = acpi_pm_finish, |
| 692 | .end = acpi_pm_end, |
| 693 | .recover = acpi_pm_finish, |
| 694 | }; |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 695 | |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 696 | static bool s2idle_in_progress; |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 697 | static bool s2idle_wakeup; |
| 698 | |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 699 | /* |
| 700 | * On platforms supporting the Low Power S0 Idle interface there is an ACPI |
| 701 | * device object with the PNP0D80 compatible device ID (System Power Management |
| 702 | * Controller) and a specific _DSM method under it. That method, if present, |
| 703 | * can be used to indicate to the platform that the OS is transitioning into a |
| 704 | * low-power state in which certain types of activity are not desirable or that |
| 705 | * it is leaving such a state, which allows the platform to adjust its operation |
| 706 | * mode accordingly. |
| 707 | */ |
| 708 | static const struct acpi_device_id lps0_device_ids[] = { |
| 709 | {"PNP0D80", }, |
| 710 | {"", }, |
| 711 | }; |
| 712 | |
| 713 | #define ACPI_LPS0_DSM_UUID "c4eb40a0-6cd2-11e2-bcfd-0800200c9a66" |
| 714 | |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 715 | #define ACPI_LPS0_GET_DEVICE_CONSTRAINTS 1 |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 716 | #define ACPI_LPS0_SCREEN_OFF 3 |
| 717 | #define ACPI_LPS0_SCREEN_ON 4 |
| 718 | #define ACPI_LPS0_ENTRY 5 |
| 719 | #define ACPI_LPS0_EXIT 6 |
| 720 | |
Rafael J. Wysocki | 29a5a6d | 2018-01-11 02:13:58 +0100 | [diff] [blame] | 721 | #define ACPI_LPS0_SCREEN_MASK ((1 << ACPI_LPS0_SCREEN_OFF) | (1 << ACPI_LPS0_SCREEN_ON)) |
| 722 | #define ACPI_LPS0_PLATFORM_MASK ((1 << ACPI_LPS0_ENTRY) | (1 << ACPI_LPS0_EXIT)) |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 723 | |
| 724 | static acpi_handle lps0_device_handle; |
| 725 | static guid_t lps0_dsm_guid; |
| 726 | static char lps0_dsm_func_mask; |
| 727 | |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 728 | /* Device constraint entry structure */ |
| 729 | struct lpi_device_info { |
| 730 | char *name; |
| 731 | int enabled; |
| 732 | union acpi_object *package; |
| 733 | }; |
| 734 | |
| 735 | /* Constraint package structure */ |
| 736 | struct lpi_device_constraint { |
| 737 | int uid; |
| 738 | int min_dstate; |
| 739 | int function_states; |
| 740 | }; |
| 741 | |
| 742 | struct lpi_constraints { |
| 743 | acpi_handle handle; |
| 744 | int min_dstate; |
| 745 | }; |
| 746 | |
| 747 | static struct lpi_constraints *lpi_constraints_table; |
| 748 | static int lpi_constraints_table_size; |
| 749 | |
| 750 | static void lpi_device_get_constraints(void) |
| 751 | { |
| 752 | union acpi_object *out_obj; |
| 753 | int i; |
| 754 | |
| 755 | out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid, |
| 756 | 1, ACPI_LPS0_GET_DEVICE_CONSTRAINTS, |
| 757 | NULL, ACPI_TYPE_PACKAGE); |
| 758 | |
| 759 | acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n", |
| 760 | out_obj ? "successful" : "failed"); |
| 761 | |
| 762 | if (!out_obj) |
| 763 | return; |
| 764 | |
| 765 | lpi_constraints_table = kcalloc(out_obj->package.count, |
| 766 | sizeof(*lpi_constraints_table), |
| 767 | GFP_KERNEL); |
| 768 | if (!lpi_constraints_table) |
| 769 | goto free_acpi_buffer; |
| 770 | |
| 771 | acpi_handle_debug(lps0_device_handle, "LPI: constraints list begin:\n"); |
| 772 | |
| 773 | for (i = 0; i < out_obj->package.count; i++) { |
| 774 | struct lpi_constraints *constraint; |
| 775 | acpi_status status; |
| 776 | union acpi_object *package = &out_obj->package.elements[i]; |
| 777 | struct lpi_device_info info = { }; |
| 778 | int package_count = 0, j; |
| 779 | |
| 780 | if (!package) |
| 781 | continue; |
| 782 | |
| 783 | for (j = 0; j < package->package.count; ++j) { |
| 784 | union acpi_object *element = |
| 785 | &(package->package.elements[j]); |
| 786 | |
| 787 | switch (element->type) { |
| 788 | case ACPI_TYPE_INTEGER: |
| 789 | info.enabled = element->integer.value; |
| 790 | break; |
| 791 | case ACPI_TYPE_STRING: |
| 792 | info.name = element->string.pointer; |
| 793 | break; |
| 794 | case ACPI_TYPE_PACKAGE: |
| 795 | package_count = element->package.count; |
| 796 | info.package = element->package.elements; |
| 797 | break; |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | if (!info.enabled || !info.package || !info.name) |
| 802 | continue; |
| 803 | |
| 804 | constraint = &lpi_constraints_table[lpi_constraints_table_size]; |
| 805 | |
| 806 | status = acpi_get_handle(NULL, info.name, &constraint->handle); |
| 807 | if (ACPI_FAILURE(status)) |
| 808 | continue; |
| 809 | |
| 810 | acpi_handle_debug(lps0_device_handle, |
| 811 | "index:%d Name:%s\n", i, info.name); |
| 812 | |
| 813 | constraint->min_dstate = -1; |
| 814 | |
| 815 | for (j = 0; j < package_count; ++j) { |
| 816 | union acpi_object *info_obj = &info.package[j]; |
| 817 | union acpi_object *cnstr_pkg; |
| 818 | union acpi_object *obj; |
| 819 | struct lpi_device_constraint dev_info; |
| 820 | |
| 821 | switch (info_obj->type) { |
| 822 | case ACPI_TYPE_INTEGER: |
| 823 | /* version */ |
| 824 | break; |
| 825 | case ACPI_TYPE_PACKAGE: |
| 826 | if (info_obj->package.count < 2) |
| 827 | break; |
| 828 | |
| 829 | cnstr_pkg = info_obj->package.elements; |
| 830 | obj = &cnstr_pkg[0]; |
| 831 | dev_info.uid = obj->integer.value; |
| 832 | obj = &cnstr_pkg[1]; |
| 833 | dev_info.min_dstate = obj->integer.value; |
| 834 | |
| 835 | acpi_handle_debug(lps0_device_handle, |
| 836 | "uid:%d min_dstate:%s\n", |
| 837 | dev_info.uid, |
| 838 | acpi_power_state_string(dev_info.min_dstate)); |
| 839 | |
| 840 | constraint->min_dstate = dev_info.min_dstate; |
| 841 | break; |
| 842 | } |
| 843 | } |
| 844 | |
| 845 | if (constraint->min_dstate < 0) { |
| 846 | acpi_handle_debug(lps0_device_handle, |
| 847 | "Incomplete constraint defined\n"); |
| 848 | continue; |
| 849 | } |
| 850 | |
| 851 | lpi_constraints_table_size++; |
| 852 | } |
| 853 | |
| 854 | acpi_handle_debug(lps0_device_handle, "LPI: constraints list end\n"); |
| 855 | |
| 856 | free_acpi_buffer: |
| 857 | ACPI_FREE(out_obj); |
| 858 | } |
| 859 | |
| 860 | static void lpi_check_constraints(void) |
| 861 | { |
| 862 | int i; |
| 863 | |
| 864 | for (i = 0; i < lpi_constraints_table_size; ++i) { |
Rafael J. Wysocki | fa54150 | 2018-03-13 10:47:36 +0100 | [diff] [blame] | 865 | acpi_handle handle = lpi_constraints_table[i].handle; |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 866 | struct acpi_device *adev; |
| 867 | |
Rafael J. Wysocki | fa54150 | 2018-03-13 10:47:36 +0100 | [diff] [blame] | 868 | if (!handle || acpi_bus_get_device(handle, &adev)) |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 869 | continue; |
| 870 | |
Rafael J. Wysocki | fa54150 | 2018-03-13 10:47:36 +0100 | [diff] [blame] | 871 | acpi_handle_debug(handle, |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 872 | "LPI: required min power state:%s current power state:%s\n", |
| 873 | acpi_power_state_string(lpi_constraints_table[i].min_dstate), |
| 874 | acpi_power_state_string(adev->power.state)); |
| 875 | |
| 876 | if (!adev->flags.power_manageable) { |
Rafael J. Wysocki | fa54150 | 2018-03-13 10:47:36 +0100 | [diff] [blame] | 877 | acpi_handle_info(handle, "LPI: Device not power manageable\n"); |
| 878 | lpi_constraints_table[i].handle = NULL; |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 879 | continue; |
| 880 | } |
| 881 | |
| 882 | if (adev->power.state < lpi_constraints_table[i].min_dstate) |
Rafael J. Wysocki | fa54150 | 2018-03-13 10:47:36 +0100 | [diff] [blame] | 883 | acpi_handle_info(handle, |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 884 | "LPI: Constraint not met; min power state:%s current power state:%s\n", |
| 885 | acpi_power_state_string(lpi_constraints_table[i].min_dstate), |
| 886 | acpi_power_state_string(adev->power.state)); |
| 887 | } |
| 888 | } |
| 889 | |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 890 | static void acpi_sleep_run_lps0_dsm(unsigned int func) |
| 891 | { |
| 892 | union acpi_object *out_obj; |
| 893 | |
| 894 | if (!(lps0_dsm_func_mask & (1 << func))) |
| 895 | return; |
| 896 | |
| 897 | out_obj = acpi_evaluate_dsm(lps0_device_handle, &lps0_dsm_guid, 1, func, NULL); |
| 898 | ACPI_FREE(out_obj); |
| 899 | |
| 900 | acpi_handle_debug(lps0_device_handle, "_DSM function %u evaluation %s\n", |
| 901 | func, out_obj ? "successful" : "failed"); |
| 902 | } |
| 903 | |
| 904 | static int lps0_device_attach(struct acpi_device *adev, |
| 905 | const struct acpi_device_id *not_used) |
| 906 | { |
| 907 | union acpi_object *out_obj; |
| 908 | |
| 909 | if (lps0_device_handle) |
| 910 | return 0; |
| 911 | |
Rafael J. Wysocki | 71630b7 | 2017-11-06 23:56:57 +0100 | [diff] [blame] | 912 | if (acpi_sleep_no_lps0) { |
| 913 | acpi_handle_info(adev->handle, |
| 914 | "Low Power S0 Idle interface disabled\n"); |
| 915 | return 0; |
| 916 | } |
| 917 | |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 918 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) |
| 919 | return 0; |
| 920 | |
| 921 | guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid); |
| 922 | /* Check if the _DSM is present and as expected. */ |
| 923 | out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL); |
| 924 | if (out_obj && out_obj->type == ACPI_TYPE_BUFFER) { |
| 925 | char bitmask = *(char *)out_obj->buffer.pointer; |
| 926 | |
Rafael J. Wysocki | 29a5a6d | 2018-01-11 02:13:58 +0100 | [diff] [blame] | 927 | if ((bitmask & ACPI_LPS0_PLATFORM_MASK) == ACPI_LPS0_PLATFORM_MASK || |
| 928 | (bitmask & ACPI_LPS0_SCREEN_MASK) == ACPI_LPS0_SCREEN_MASK) { |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 929 | lps0_dsm_func_mask = bitmask; |
| 930 | lps0_device_handle = adev->handle; |
Rafael J. Wysocki | e870c6c8 | 2017-07-31 23:43:18 +0200 | [diff] [blame] | 931 | /* |
| 932 | * Use suspend-to-idle by default if the default |
| 933 | * suspend mode was not set from the command line. |
| 934 | */ |
| 935 | if (mem_sleep_default > PM_SUSPEND_MEM) |
Rafael J. Wysocki | 690cbb9 | 2017-08-10 00:13:07 +0200 | [diff] [blame] | 936 | mem_sleep_current = PM_SUSPEND_TO_IDLE; |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 937 | } |
| 938 | |
| 939 | acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n", |
| 940 | bitmask); |
| 941 | } else { |
| 942 | acpi_handle_debug(adev->handle, |
| 943 | "_DSM function 0 evaluation failed\n"); |
| 944 | } |
| 945 | ACPI_FREE(out_obj); |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 946 | |
| 947 | lpi_device_get_constraints(); |
| 948 | |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 949 | return 0; |
| 950 | } |
| 951 | |
| 952 | static struct acpi_scan_handler lps0_handler = { |
| 953 | .ids = lps0_device_ids, |
| 954 | .attach = lps0_device_attach, |
| 955 | }; |
| 956 | |
Rafael J. Wysocki | 23d5855f | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 957 | static int acpi_s2idle_begin(void) |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 958 | { |
| 959 | acpi_scan_lock_acquire(); |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 960 | s2idle_in_progress = true; |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 961 | return 0; |
| 962 | } |
| 963 | |
Rafael J. Wysocki | 23d5855f | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 964 | static int acpi_s2idle_prepare(void) |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 965 | { |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 966 | if (lps0_device_handle) { |
| 967 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF); |
| 968 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY); |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 969 | } |
Rafael J. Wysocki | 147a7d9 | 2018-02-20 12:10:32 +0100 | [diff] [blame] | 970 | |
Chen Yu | 8c01275 | 2015-10-25 01:02:46 +0800 | [diff] [blame] | 971 | if (acpi_sci_irq_valid()) |
| 972 | enable_irq_wake(acpi_sci_irq); |
Rafael J. Wysocki | 235d81a6 | 2017-06-12 22:51:07 +0200 | [diff] [blame] | 973 | |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 974 | return 0; |
| 975 | } |
| 976 | |
Rafael J. Wysocki | 23d5855f | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 977 | static void acpi_s2idle_wake(void) |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 978 | { |
Srinivas Pandruvada | 726fb6b | 2017-08-15 18:16:59 -0700 | [diff] [blame] | 979 | |
| 980 | if (pm_debug_messages_on) |
| 981 | lpi_check_constraints(); |
| 982 | |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 983 | /* |
| 984 | * If IRQD_WAKEUP_ARMED is not set for the SCI at this point, it means |
| 985 | * that the SCI has triggered while suspended, so cancel the wakeup in |
| 986 | * case it has not been a wakeup event (the GPEs will be checked later). |
| 987 | */ |
| 988 | if (acpi_sci_irq_valid() && |
| 989 | !irqd_is_wakeup_armed(irq_get_irq_data(acpi_sci_irq))) { |
| 990 | pm_system_cancel_wakeup(); |
| 991 | s2idle_wakeup = true; |
Rafael J. Wysocki | 68e2201 | 2018-05-16 14:13:21 +0200 | [diff] [blame] | 992 | /* |
| 993 | * On some platforms with the LPS0 _DSM device noirq resume |
| 994 | * takes too much time for EC wakeup events to survive, so look |
| 995 | * for them now. |
| 996 | */ |
| 997 | if (lps0_device_handle) |
| 998 | acpi_ec_dispatch_gpe(); |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 999 | } |
| 1000 | } |
| 1001 | |
Rafael J. Wysocki | 23d5855f | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 1002 | static void acpi_s2idle_sync(void) |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 1003 | { |
| 1004 | /* |
| 1005 | * Process all pending events in case there are any wakeup ones. |
| 1006 | * |
Rafael J. Wysocki | 880a662 | 2017-07-20 03:43:12 +0200 | [diff] [blame] | 1007 | * The EC driver uses the system workqueue and an additional special |
| 1008 | * one, so those need to be flushed too. |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 1009 | */ |
Chris Chiu | 6f1d7c4 | 2018-03-31 10:09:31 +0800 | [diff] [blame] | 1010 | acpi_os_wait_events_complete(); /* synchronize SCI IRQ handling */ |
Rafael J. Wysocki | 880a662 | 2017-07-20 03:43:12 +0200 | [diff] [blame] | 1011 | acpi_ec_flush_work(); |
Chris Chiu | 6f1d7c4 | 2018-03-31 10:09:31 +0800 | [diff] [blame] | 1012 | acpi_os_wait_events_complete(); /* synchronize Notify handling */ |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 1013 | s2idle_wakeup = false; |
| 1014 | } |
| 1015 | |
Rafael J. Wysocki | 23d5855f | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 1016 | static void acpi_s2idle_restore(void) |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 1017 | { |
Chen Yu | 8c01275 | 2015-10-25 01:02:46 +0800 | [diff] [blame] | 1018 | if (acpi_sci_irq_valid()) |
| 1019 | disable_irq_wake(acpi_sci_irq); |
Rafael J. Wysocki | 235d81a6 | 2017-06-12 22:51:07 +0200 | [diff] [blame] | 1020 | |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 1021 | if (lps0_device_handle) { |
| 1022 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT); |
| 1023 | acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON); |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 1024 | } |
Rafael J. Wysocki | a8d46b9 | 2014-09-30 02:29:01 +0200 | [diff] [blame] | 1025 | } |
| 1026 | |
Rafael J. Wysocki | 23d5855f | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 1027 | static void acpi_s2idle_end(void) |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 1028 | { |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 1029 | s2idle_in_progress = false; |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 1030 | acpi_scan_lock_release(); |
| 1031 | } |
| 1032 | |
Rafael J. Wysocki | 23d5855f | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 1033 | static const struct platform_s2idle_ops acpi_s2idle_ops = { |
| 1034 | .begin = acpi_s2idle_begin, |
| 1035 | .prepare = acpi_s2idle_prepare, |
| 1036 | .wake = acpi_s2idle_wake, |
| 1037 | .sync = acpi_s2idle_sync, |
| 1038 | .restore = acpi_s2idle_restore, |
| 1039 | .end = acpi_s2idle_end, |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 1040 | }; |
| 1041 | |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 1042 | static void acpi_sleep_suspend_setup(void) |
| 1043 | { |
| 1044 | int i; |
| 1045 | |
Rafael J. Wysocki | a4e90be | 2014-03-13 22:11:39 +0100 | [diff] [blame] | 1046 | for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) |
| 1047 | if (acpi_sleep_state_supported(i)) |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 1048 | sleep_states[i] = 1; |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 1049 | |
| 1050 | suspend_set_ops(old_suspend_ordering ? |
| 1051 | &acpi_suspend_ops_old : &acpi_suspend_ops); |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 1052 | |
| 1053 | acpi_scan_add_handler(&lps0_handler); |
Rafael J. Wysocki | 23d5855f | 2017-08-10 00:15:30 +0200 | [diff] [blame] | 1054 | s2idle_set_ops(&acpi_s2idle_ops); |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 1055 | } |
Rafael J. Wysocki | 1f0b638 | 2014-05-15 23:29:57 +0200 | [diff] [blame] | 1056 | |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 1057 | #else /* !CONFIG_SUSPEND */ |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 1058 | #define s2idle_in_progress (false) |
| 1059 | #define s2idle_wakeup (false) |
| 1060 | #define lps0_device_handle (NULL) |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 1061 | static inline void acpi_sleep_suspend_setup(void) {} |
| 1062 | #endif /* !CONFIG_SUSPEND */ |
Rafael J. Wysocki | 296699d | 2007-07-29 23:27:18 +0200 | [diff] [blame] | 1063 | |
Rafael J. Wysocki | 33e4f80 | 2017-06-12 22:56:34 +0200 | [diff] [blame] | 1064 | bool acpi_s2idle_wakeup(void) |
| 1065 | { |
| 1066 | return s2idle_wakeup; |
| 1067 | } |
| 1068 | |
Rafael J. Wysocki | 8110dd28 | 2017-06-23 15:24:32 +0200 | [diff] [blame] | 1069 | bool acpi_sleep_no_ec_events(void) |
| 1070 | { |
| 1071 | return !s2idle_in_progress || !lps0_device_handle; |
| 1072 | } |
| 1073 | |
Sudeep Holla | 504997c | 2016-02-17 12:03:23 +0000 | [diff] [blame] | 1074 | #ifdef CONFIG_PM_SLEEP |
| 1075 | static u32 saved_bm_rld; |
| 1076 | |
| 1077 | static int acpi_save_bm_rld(void) |
| 1078 | { |
| 1079 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld); |
| 1080 | return 0; |
| 1081 | } |
| 1082 | |
| 1083 | static void acpi_restore_bm_rld(void) |
| 1084 | { |
| 1085 | u32 resumed_bm_rld = 0; |
| 1086 | |
| 1087 | acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld); |
| 1088 | if (resumed_bm_rld == saved_bm_rld) |
| 1089 | return; |
| 1090 | |
| 1091 | acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld); |
| 1092 | } |
| 1093 | |
| 1094 | static struct syscore_ops acpi_sleep_syscore_ops = { |
| 1095 | .suspend = acpi_save_bm_rld, |
| 1096 | .resume = acpi_restore_bm_rld, |
| 1097 | }; |
| 1098 | |
Jean Delvare | a042e0c | 2017-07-31 11:40:13 +0200 | [diff] [blame] | 1099 | static void acpi_sleep_syscore_init(void) |
Sudeep Holla | 504997c | 2016-02-17 12:03:23 +0000 | [diff] [blame] | 1100 | { |
| 1101 | register_syscore_ops(&acpi_sleep_syscore_ops); |
| 1102 | } |
| 1103 | #else |
| 1104 | static inline void acpi_sleep_syscore_init(void) {} |
| 1105 | #endif /* CONFIG_PM_SLEEP */ |
| 1106 | |
Rafael J. Wysocki | b0cb1a1 | 2007-07-29 23:24:36 +0200 | [diff] [blame] | 1107 | #ifdef CONFIG_HIBERNATION |
Shaohua Li | bdfe6b7 | 2008-07-23 21:28:41 -0700 | [diff] [blame] | 1108 | static unsigned long s4_hardware_signature; |
| 1109 | static struct acpi_table_facs *facs; |
| 1110 | static bool nosigcheck; |
| 1111 | |
| 1112 | void __init acpi_no_s4_hw_signature(void) |
| 1113 | { |
| 1114 | nosigcheck = true; |
| 1115 | } |
| 1116 | |
Rafael J. Wysocki | caea99e | 2008-01-08 00:08:44 +0100 | [diff] [blame] | 1117 | static int acpi_hibernation_begin(void) |
Rafael J. Wysocki | 74f270a | 2007-10-18 03:04:42 -0700 | [diff] [blame] | 1118 | { |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 1119 | int error; |
| 1120 | |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 1121 | error = nvs_nosave ? 0 : suspend_nvs_alloc(); |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 1122 | if (!error) |
| 1123 | acpi_pm_start(ACPI_STATE_S4); |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 1124 | |
| 1125 | return error; |
| 1126 | } |
| 1127 | |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 1128 | static int acpi_hibernation_enter(void) |
| 1129 | { |
| 1130 | acpi_status status = AE_OK; |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 1131 | |
| 1132 | ACPI_FLUSH_CPU_CACHE(); |
| 1133 | |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 1134 | /* This shouldn't return. If it returns, we have a problem */ |
Len Brown | 3f6f49c | 2012-07-26 20:08:54 -0400 | [diff] [blame] | 1135 | status = acpi_enter_sleep_state(ACPI_STATE_S4); |
| 1136 | /* Reprogram control registers */ |
| 1137 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 1138 | |
| 1139 | return ACPI_SUCCESS(status) ? 0 : -EFAULT; |
| 1140 | } |
| 1141 | |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 1142 | static void acpi_hibernation_leave(void) |
| 1143 | { |
Lukas Wunner | fbda4b3 | 2016-03-23 00:11:20 +0100 | [diff] [blame] | 1144 | pm_set_resume_via_firmware(); |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 1145 | /* |
| 1146 | * If ACPI is not enabled by the BIOS and the boot kernel, we need to |
| 1147 | * enable it here. |
| 1148 | */ |
| 1149 | acpi_enable(); |
Len Brown | 3f6f49c | 2012-07-26 20:08:54 -0400 | [diff] [blame] | 1150 | /* Reprogram control registers */ |
| 1151 | acpi_leave_sleep_state_prep(ACPI_STATE_S4); |
Shaohua Li | bdfe6b7 | 2008-07-23 21:28:41 -0700 | [diff] [blame] | 1152 | /* Check the hardware signature */ |
Oliver Neukum | 5c551e6 | 2014-01-10 10:51:53 +0100 | [diff] [blame] | 1153 | if (facs && s4_hardware_signature != facs->hardware_signature) |
| 1154 | pr_crit("ACPI: Hardware changed while hibernated, success doubtful!\n"); |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 1155 | /* Restore the NVS memory area */ |
Matthew Garrett | dd4c4f1 | 2010-05-28 16:32:14 -0400 | [diff] [blame] | 1156 | suspend_nvs_restore(); |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 1157 | /* Allow EC transactions to happen. */ |
Lv Zheng | c2b46d67 | 2016-08-03 16:01:36 +0800 | [diff] [blame] | 1158 | acpi_ec_unblock_transactions(); |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 1159 | } |
| 1160 | |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 1161 | static void acpi_pm_thaw(void) |
Rafael J. Wysocki | f6bb13a | 2010-03-04 01:52:58 +0100 | [diff] [blame] | 1162 | { |
Rafael J. Wysocki | fe95568 | 2010-04-09 01:40:38 +0200 | [diff] [blame] | 1163 | acpi_ec_unblock_transactions(); |
Lin Ming | 3d97e42 | 2008-12-16 16:57:46 +0800 | [diff] [blame] | 1164 | acpi_enable_all_runtime_gpes(); |
Rafael J. Wysocki | a634cc1 | 2007-07-19 01:47:30 -0700 | [diff] [blame] | 1165 | } |
| 1166 | |
Lionel Debroux | 073ef1f | 2010-11-09 21:48:49 +0100 | [diff] [blame] | 1167 | static const struct platform_hibernation_ops acpi_hibernation_ops = { |
Rafael J. Wysocki | caea99e | 2008-01-08 00:08:44 +0100 | [diff] [blame] | 1168 | .begin = acpi_hibernation_begin, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 1169 | .end = acpi_pm_end, |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 1170 | .pre_snapshot = acpi_pm_prepare, |
Matthew Garrett | 2a6b697 | 2010-05-28 16:32:15 -0400 | [diff] [blame] | 1171 | .finish = acpi_pm_finish, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 1172 | .prepare = acpi_pm_prepare, |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 1173 | .enter = acpi_hibernation_enter, |
Rafael J. Wysocki | c7e0831 | 2007-10-18 03:04:55 -0700 | [diff] [blame] | 1174 | .leave = acpi_hibernation_leave, |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 1175 | .pre_restore = acpi_pm_freeze, |
| 1176 | .restore_cleanup = acpi_pm_thaw, |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 1177 | }; |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 1178 | |
| 1179 | /** |
| 1180 | * acpi_hibernation_begin_old - Set the target system sleep state to |
| 1181 | * ACPI_STATE_S4 and execute the _PTS control method. This |
| 1182 | * function is used if the pre-ACPI 2.0 suspend ordering has been |
| 1183 | * requested. |
| 1184 | */ |
| 1185 | static int acpi_hibernation_begin_old(void) |
| 1186 | { |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 1187 | int error; |
| 1188 | /* |
| 1189 | * The _TTS object should always be evaluated before the _PTS object. |
| 1190 | * When the old_suspended_ordering is true, the _PTS object is |
| 1191 | * evaluated in the acpi_sleep_prepare. |
| 1192 | */ |
| 1193 | acpi_sleep_tts_switch(ACPI_STATE_S4); |
| 1194 | |
| 1195 | error = acpi_sleep_prepare(ACPI_STATE_S4); |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 1196 | |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 1197 | if (!error) { |
Rafael J. Wysocki | 72ad5d7 | 2010-07-23 22:59:09 +0200 | [diff] [blame] | 1198 | if (!nvs_nosave) |
Matthew Garrett | dd4c4f1 | 2010-05-28 16:32:14 -0400 | [diff] [blame] | 1199 | error = suspend_nvs_alloc(); |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 1200 | if (!error) { |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 1201 | acpi_target_sleep_state = ACPI_STATE_S4; |
Rafael J. Wysocki | ad07277 | 2013-08-20 01:42:32 +0200 | [diff] [blame] | 1202 | acpi_scan_lock_acquire(); |
| 1203 | } |
Rafael J. Wysocki | 3f4b0ef | 2008-10-26 20:52:15 +0100 | [diff] [blame] | 1204 | } |
| 1205 | return error; |
| 1206 | } |
| 1207 | |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 1208 | /* |
| 1209 | * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has |
| 1210 | * been requested. |
| 1211 | */ |
Lionel Debroux | 073ef1f | 2010-11-09 21:48:49 +0100 | [diff] [blame] | 1212 | static const struct platform_hibernation_ops acpi_hibernation_ops_old = { |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 1213 | .begin = acpi_hibernation_begin_old, |
| 1214 | .end = acpi_pm_end, |
Rafael J. Wysocki | c5f7a1b | 2010-07-02 00:14:09 +0200 | [diff] [blame] | 1215 | .pre_snapshot = acpi_pm_pre_suspend, |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 1216 | .prepare = acpi_pm_freeze, |
Matthew Garrett | 2a6b697 | 2010-05-28 16:32:15 -0400 | [diff] [blame] | 1217 | .finish = acpi_pm_finish, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 1218 | .enter = acpi_hibernation_enter, |
| 1219 | .leave = acpi_hibernation_leave, |
Rafael J. Wysocki | d5a6451 | 2010-04-09 01:39:40 +0200 | [diff] [blame] | 1220 | .pre_restore = acpi_pm_freeze, |
| 1221 | .restore_cleanup = acpi_pm_thaw, |
Rafael J. Wysocki | d8f3de0 | 2008-06-12 23:24:06 +0200 | [diff] [blame] | 1222 | .recover = acpi_pm_finish, |
| 1223 | }; |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 1224 | |
| 1225 | static void acpi_sleep_hibernate_setup(void) |
| 1226 | { |
Rafael J. Wysocki | a4e90be | 2014-03-13 22:11:39 +0100 | [diff] [blame] | 1227 | if (!acpi_sleep_state_supported(ACPI_STATE_S4)) |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 1228 | return; |
| 1229 | |
| 1230 | hibernation_set_ops(old_suspend_ordering ? |
| 1231 | &acpi_hibernation_ops_old : &acpi_hibernation_ops); |
| 1232 | sleep_states[ACPI_STATE_S4] = 1; |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 1233 | if (nosigcheck) |
| 1234 | return; |
| 1235 | |
| 1236 | acpi_get_table(ACPI_SIG_FACS, 1, (struct acpi_table_header **)&facs); |
| 1237 | if (facs) |
| 1238 | s4_hardware_signature = facs->hardware_signature; |
| 1239 | } |
| 1240 | #else /* !CONFIG_HIBERNATION */ |
| 1241 | static inline void acpi_sleep_hibernate_setup(void) {} |
| 1242 | #endif /* !CONFIG_HIBERNATION */ |
Rafael J. Wysocki | a3d25c2 | 2007-05-09 02:33:18 -0700 | [diff] [blame] | 1243 | |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 1244 | static void acpi_power_off_prepare(void) |
| 1245 | { |
| 1246 | /* Prepare to power off the system */ |
| 1247 | acpi_sleep_prepare(ACPI_STATE_S5); |
Lin Ming | 3d97e42 | 2008-12-16 16:57:46 +0800 | [diff] [blame] | 1248 | acpi_disable_all_gpes(); |
Rafael J. Wysocki | c52fa70 | 2014-12-01 23:51:13 +0100 | [diff] [blame] | 1249 | acpi_os_wait_events_complete(); |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 1250 | } |
| 1251 | |
| 1252 | static void acpi_power_off(void) |
| 1253 | { |
| 1254 | /* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */ |
Frank Seidel | 4d93915 | 2009-02-04 17:03:07 +0100 | [diff] [blame] | 1255 | printk(KERN_DEBUG "%s called\n", __func__); |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 1256 | local_irq_disable(); |
Len Brown | 3f6f49c | 2012-07-26 20:08:54 -0400 | [diff] [blame] | 1257 | acpi_enter_sleep_state(ACPI_STATE_S5); |
Len Brown | 96f15ef | 2009-04-17 23:32:20 -0400 | [diff] [blame] | 1258 | } |
| 1259 | |
Alexey Starikovskiy | aafbcd1 | 2007-02-10 01:32:16 -0500 | [diff] [blame] | 1260 | int __init acpi_sleep_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | { |
Joe Perches | ed4cf5b | 2013-02-22 07:37:36 +0000 | [diff] [blame] | 1262 | char supported[ACPI_S_STATE_COUNT * 3 + 1]; |
| 1263 | char *pos = supported; |
| 1264 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | |
Zhang Rui | 0ac1b1d | 2012-11-30 12:57:03 +0100 | [diff] [blame] | 1266 | acpi_sleep_dmi_check(); |
| 1267 | |
Frans Pop | 5a50fe7 | 2007-09-20 22:27:44 +0200 | [diff] [blame] | 1268 | sleep_states[ACPI_STATE_S0] = 1; |
Frans Pop | 5a50fe7 | 2007-09-20 22:27:44 +0200 | [diff] [blame] | 1269 | |
Sudeep Holla | 504997c | 2016-02-17 12:03:23 +0000 | [diff] [blame] | 1270 | acpi_sleep_syscore_init(); |
Rafael J. Wysocki | 02040f0 | 2013-01-17 14:11:09 +0100 | [diff] [blame] | 1271 | acpi_sleep_suspend_setup(); |
| 1272 | acpi_sleep_hibernate_setup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | |
Rafael J. Wysocki | a4e90be | 2014-03-13 22:11:39 +0100 | [diff] [blame] | 1274 | if (acpi_sleep_state_supported(ACPI_STATE_S5)) { |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 1275 | sleep_states[ACPI_STATE_S5] = 1; |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 1276 | pm_power_off_prepare = acpi_power_off_prepare; |
| 1277 | pm_power_off = acpi_power_off; |
Chen Yu | 1373718 | 2016-03-22 08:51:10 +0800 | [diff] [blame] | 1278 | } else { |
| 1279 | acpi_no_s5 = true; |
Alexey Starikovskiy | f216cc3 | 2007-09-20 21:32:35 +0400 | [diff] [blame] | 1280 | } |
Joe Perches | ed4cf5b | 2013-02-22 07:37:36 +0000 | [diff] [blame] | 1281 | |
| 1282 | supported[0] = 0; |
| 1283 | for (i = 0; i < ACPI_S_STATE_COUNT; i++) { |
| 1284 | if (sleep_states[i]) |
| 1285 | pos += sprintf(pos, " S%d", i); |
| 1286 | } |
| 1287 | pr_info(PREFIX "(supports%s)\n", supported); |
| 1288 | |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 1289 | /* |
Rafael J. Wysocki | 9713adc | 2016-11-21 14:25:49 +0100 | [diff] [blame] | 1290 | * Register the tts_notifier to reboot notifier list so that the _TTS |
| 1291 | * object can also be evaluated when the system enters S5. |
Zhao Yakui | e49f711 | 2008-08-12 10:20:22 +0800 | [diff] [blame] | 1292 | */ |
Rafael J. Wysocki | 9713adc | 2016-11-21 14:25:49 +0100 | [diff] [blame] | 1293 | register_reboot_notifier(&tts_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | return 0; |
| 1295 | } |