Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 2 | * Copyright (C) 2004, 2013 Intel Corporation |
| 3 | * Author: Naveen B S <naveen.b.s@intel.com> |
| 4 | * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or (at |
| 11 | * your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 16 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 17 | * details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 | * |
| 23 | * |
| 24 | * ACPI based HotPlug driver that supports Memory Hotplug |
Nick Andrew | c7060d9 | 2009-01-03 18:53:39 +1100 | [diff] [blame] | 25 | * This driver fields notifications from firmware for memory add |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | * and remove operations and alerts the VM of the affected memory |
| 27 | * ranges. |
| 28 | */ |
| 29 | |
Toshi Kani | ab6c570 | 2012-11-20 23:42:28 +0000 | [diff] [blame] | 30 | #include <linux/acpi.h> |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 31 | #include <linux/memory_hotplug.h> |
| 32 | |
| 33 | #include "internal.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #define ACPI_MEMORY_DEVICE_CLASS "memory" |
| 36 | #define ACPI_MEMORY_DEVICE_HID "PNP0C80" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #define ACPI_MEMORY_DEVICE_NAME "Hotplug Mem Device" |
| 38 | |
| 39 | #define _COMPONENT ACPI_MEMORY_DEVICE_COMPONENT |
| 40 | |
Zhao Yakui | aa7b2b2 | 2009-07-03 10:49:03 +0800 | [diff] [blame] | 41 | #undef PREFIX |
| 42 | #define PREFIX "ACPI:memory_hp:" |
| 43 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 44 | ACPI_MODULE_NAME("acpi_memhotplug"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | /* Memory Device States */ |
| 47 | #define MEMORY_INVALID_STATE 0 |
| 48 | #define MEMORY_POWER_ON_STATE 1 |
| 49 | #define MEMORY_POWER_OFF_STATE 2 |
| 50 | |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 51 | static int acpi_memory_device_add(struct acpi_device *device, |
| 52 | const struct acpi_device_id *not_used); |
| 53 | static void acpi_memory_device_remove(struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 55 | static const struct acpi_device_id memory_device_ids[] = { |
| 56 | {ACPI_MEMORY_DEVICE_HID, 0}, |
| 57 | {"", 0}, |
| 58 | }; |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 59 | |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 60 | static struct acpi_scan_handler memory_device_handler = { |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 61 | .ids = memory_device_ids, |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 62 | .attach = acpi_memory_device_add, |
| 63 | .detach = acpi_memory_device_remove, |
| 64 | .hotplug = { |
| 65 | .enabled = true, |
| 66 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | }; |
| 68 | |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 69 | struct acpi_memory_info { |
| 70 | struct list_head list; |
| 71 | u64 start_addr; /* Memory Range start physical addr */ |
| 72 | u64 length; /* Memory Range length */ |
| 73 | unsigned short caching; /* memory cache attribute */ |
| 74 | unsigned short write_protect; /* memory read/write attribute */ |
| 75 | unsigned int enabled:1; |
| 76 | }; |
| 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | struct acpi_memory_device { |
Patrick Mochel | 3b74863 | 2006-05-19 16:54:38 -0400 | [diff] [blame] | 79 | struct acpi_device * device; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 80 | unsigned int state; /* State of the memory device */ |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 81 | struct list_head res_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | }; |
| 83 | |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 84 | static acpi_status |
| 85 | acpi_memory_get_resource(struct acpi_resource *resource, void *context) |
| 86 | { |
| 87 | struct acpi_memory_device *mem_device = context; |
| 88 | struct acpi_resource_address64 address64; |
| 89 | struct acpi_memory_info *info, *new; |
| 90 | acpi_status status; |
| 91 | |
| 92 | status = acpi_resource_to_address64(resource, &address64); |
| 93 | if (ACPI_FAILURE(status) || |
| 94 | (address64.resource_type != ACPI_MEMORY_RANGE)) |
| 95 | return AE_OK; |
| 96 | |
| 97 | list_for_each_entry(info, &mem_device->res_list, list) { |
| 98 | /* Can we combine the resource range information? */ |
| 99 | if ((info->caching == address64.info.mem.caching) && |
| 100 | (info->write_protect == address64.info.mem.write_protect) && |
| 101 | (info->start_addr + info->length == address64.minimum)) { |
| 102 | info->length += address64.address_length; |
| 103 | return AE_OK; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | new = kzalloc(sizeof(struct acpi_memory_info), GFP_KERNEL); |
| 108 | if (!new) |
| 109 | return AE_ERROR; |
| 110 | |
| 111 | INIT_LIST_HEAD(&new->list); |
| 112 | new->caching = address64.info.mem.caching; |
| 113 | new->write_protect = address64.info.mem.write_protect; |
| 114 | new->start_addr = address64.minimum; |
| 115 | new->length = address64.address_length; |
| 116 | list_add_tail(&new->list, &mem_device->res_list); |
| 117 | |
| 118 | return AE_OK; |
| 119 | } |
| 120 | |
Wen Congyang | 386e52b | 2012-11-16 02:06:06 +0100 | [diff] [blame] | 121 | static void |
| 122 | acpi_memory_free_device_resources(struct acpi_memory_device *mem_device) |
| 123 | { |
| 124 | struct acpi_memory_info *info, *n; |
| 125 | |
| 126 | list_for_each_entry_safe(info, n, &mem_device->res_list, list) |
| 127 | kfree(info); |
| 128 | INIT_LIST_HEAD(&mem_device->res_list); |
| 129 | } |
| 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | static int |
| 132 | acpi_memory_get_device_resources(struct acpi_memory_device *mem_device) |
| 133 | { |
| 134 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
KAMEZAWA Hiroyuki | 5d2870f | 2006-08-05 12:15:04 -0700 | [diff] [blame] | 136 | if (!list_empty(&mem_device->res_list)) |
| 137 | return 0; |
| 138 | |
Patrick Mochel | b863278 | 2006-05-19 16:54:41 -0400 | [diff] [blame] | 139 | status = acpi_walk_resources(mem_device->device->handle, METHOD_NAME__CRS, |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 140 | acpi_memory_get_resource, mem_device); |
| 141 | if (ACPI_FAILURE(status)) { |
Wen Congyang | 386e52b | 2012-11-16 02:06:06 +0100 | [diff] [blame] | 142 | acpi_memory_free_device_resources(mem_device); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 143 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | } |
| 145 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 146 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | } |
| 148 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 149 | static int acpi_memory_check_device(struct acpi_memory_device *mem_device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | { |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 151 | unsigned long long current_status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
| 153 | /* Get device present/absent information from the _STA */ |
Patrick Mochel | b863278 | 2006-05-19 16:54:41 -0400 | [diff] [blame] | 154 | if (ACPI_FAILURE(acpi_evaluate_integer(mem_device->device->handle, "_STA", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 155 | NULL, ¤t_status))) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 156 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | /* |
| 158 | * Check for device status. Device should be |
| 159 | * present/enabled/functioning. |
| 160 | */ |
Bjorn Helgaas | a0bd4ac | 2007-04-25 14:17:39 -0400 | [diff] [blame] | 161 | if (!((current_status & ACPI_STA_DEVICE_PRESENT) |
| 162 | && (current_status & ACPI_STA_DEVICE_ENABLED) |
| 163 | && (current_status & ACPI_STA_DEVICE_FUNCTIONING))) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 164 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 166 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } |
| 168 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 169 | static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 171 | int result, num_enabled = 0; |
| 172 | struct acpi_memory_info *info; |
Yasunori Goto | 1e3590e | 2006-06-27 02:53:31 -0700 | [diff] [blame] | 173 | int node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
Patrick Mochel | b863278 | 2006-05-19 16:54:41 -0400 | [diff] [blame] | 175 | node = acpi_get_node(mem_device->device->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | /* |
| 177 | * Tell the VM there is more memory here... |
| 178 | * Note: Assume that this function returns zero on success |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 179 | * We don't have memory-hot-add rollback function,now. |
| 180 | * (i.e. memory-hot-remove function) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | */ |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 182 | list_for_each_entry(info, &mem_device->res_list, list) { |
KAMEZAWA Hiroyuki | fa25d8d | 2006-08-05 12:15:02 -0700 | [diff] [blame] | 183 | if (info->enabled) { /* just sanity check...*/ |
Yasunori Goto | dd56a8e | 2006-06-27 02:53:29 -0700 | [diff] [blame] | 184 | num_enabled++; |
| 185 | continue; |
| 186 | } |
Zhao Yakui | 5d2619f | 2009-07-07 10:56:11 +0800 | [diff] [blame] | 187 | /* |
| 188 | * If the memory block size is zero, please ignore it. |
| 189 | * Don't try to do the following memory hotplug flowchart. |
| 190 | */ |
| 191 | if (!info->length) |
| 192 | continue; |
Keith Mannthey | 8c2676a | 2006-09-30 23:27:07 -0700 | [diff] [blame] | 193 | if (node < 0) |
| 194 | node = memory_add_physaddr_to_nid(info->start_addr); |
| 195 | |
Yasunori Goto | bc02af9 | 2006-06-27 02:53:30 -0700 | [diff] [blame] | 196 | result = add_memory(node, info->start_addr, info->length); |
Wen Congyang | 6547947 | 2012-11-16 02:10:37 +0100 | [diff] [blame] | 197 | |
| 198 | /* |
| 199 | * If the memory block has been used by the kernel, add_memory() |
| 200 | * returns -EEXIST. If add_memory() returns the other error, it |
| 201 | * means that this memory block is not used by the kernel. |
| 202 | */ |
Yasuaki Ishimatsu | fd4655c | 2013-03-22 01:53:49 +0000 | [diff] [blame] | 203 | if (result && result != -EEXIST) |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 204 | continue; |
Wen Congyang | 6547947 | 2012-11-16 02:10:37 +0100 | [diff] [blame] | 205 | |
Yasuaki Ishimatsu | bb49d82 | 2013-03-21 04:36:12 +0000 | [diff] [blame] | 206 | info->enabled = 1; |
| 207 | |
Wen Congyang | 6547947 | 2012-11-16 02:10:37 +0100 | [diff] [blame] | 208 | /* |
| 209 | * Add num_enable even if add_memory() returns -EEXIST, so the |
| 210 | * device is bound to this driver. |
| 211 | */ |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 212 | num_enabled++; |
| 213 | } |
| 214 | if (!num_enabled) { |
Toshi Kani | ab6c570 | 2012-11-20 23:42:28 +0000 | [diff] [blame] | 215 | dev_err(&mem_device->device->dev, "add_memory failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | mem_device->state = MEMORY_INVALID_STATE; |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 217 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | } |
Zhao Yakui | 5d2619f | 2009-07-07 10:56:11 +0800 | [diff] [blame] | 219 | /* |
| 220 | * Sometimes the memory device will contain several memory blocks. |
| 221 | * When one memory block is hot-added to the system memory, it will |
| 222 | * be regarded as a success. |
| 223 | * Otherwise if the last memory block can't be hot-added to the system |
| 224 | * memory, it will be failure and the memory device can't be bound with |
| 225 | * driver. |
| 226 | */ |
| 227 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | } |
| 229 | |
Yasuaki Ishimatsu | 19387b2 | 2012-11-15 06:59:31 +0000 | [diff] [blame] | 230 | static int acpi_memory_remove_memory(struct acpi_memory_device *mem_device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
Tang Chen | 60a5a19 | 2013-02-22 16:33:14 -0800 | [diff] [blame] | 232 | int result = 0, nid; |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 233 | struct acpi_memory_info *info, *n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Tang Chen | 60a5a19 | 2013-02-22 16:33:14 -0800 | [diff] [blame] | 235 | nid = acpi_get_node(mem_device->device->handle); |
| 236 | |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 237 | list_for_each_entry_safe(info, n, &mem_device->res_list, list) { |
Wen Congyang | 6547947 | 2012-11-16 02:10:37 +0100 | [diff] [blame] | 238 | if (!info->enabled) |
Yasuaki Ishimatsu | fd4655c | 2013-03-22 01:53:49 +0000 | [diff] [blame] | 239 | continue; |
Wen Congyang | 6547947 | 2012-11-16 02:10:37 +0100 | [diff] [blame] | 240 | |
Tang Chen | 60a5a19 | 2013-02-22 16:33:14 -0800 | [diff] [blame] | 241 | if (nid < 0) |
| 242 | nid = memory_add_physaddr_to_nid(info->start_addr); |
| 243 | result = remove_memory(nid, info->start_addr, info->length); |
Wen Congyang | 6547947 | 2012-11-16 02:10:37 +0100 | [diff] [blame] | 244 | if (result) |
| 245 | return result; |
Yasuaki Ishimatsu | 19387b2 | 2012-11-15 06:59:31 +0000 | [diff] [blame] | 246 | |
| 247 | list_del(&info->list); |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 248 | kfree(info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Wen Congyang | 6547947 | 2012-11-16 02:10:37 +0100 | [diff] [blame] | 251 | return result; |
Yasuaki Ishimatsu | 19387b2 | 2012-11-15 06:59:31 +0000 | [diff] [blame] | 252 | } |
| 253 | |
Wen Congyang | 386e52b | 2012-11-16 02:06:06 +0100 | [diff] [blame] | 254 | static void acpi_memory_device_free(struct acpi_memory_device *mem_device) |
| 255 | { |
| 256 | if (!mem_device) |
| 257 | return; |
| 258 | |
| 259 | acpi_memory_free_device_resources(mem_device); |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 260 | mem_device->device->driver_data = NULL; |
Wen Congyang | 386e52b | 2012-11-16 02:06:06 +0100 | [diff] [blame] | 261 | kfree(mem_device); |
| 262 | } |
| 263 | |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 264 | static int acpi_memory_device_add(struct acpi_device *device, |
| 265 | const struct acpi_device_id *not_used) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | { |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 267 | struct acpi_memory_device *mem_device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | if (!device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 271 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 273 | mem_device = kzalloc(sizeof(struct acpi_memory_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | if (!mem_device) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 275 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
KAMEZAWA Hiroyuki | 9ac0239 | 2006-06-27 02:53:27 -0700 | [diff] [blame] | 277 | INIT_LIST_HEAD(&mem_device->res_list); |
Patrick Mochel | 3b74863 | 2006-05-19 16:54:38 -0400 | [diff] [blame] | 278 | mem_device->device = device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | sprintf(acpi_device_name(device), "%s", ACPI_MEMORY_DEVICE_NAME); |
| 280 | sprintf(acpi_device_class(device), "%s", ACPI_MEMORY_DEVICE_CLASS); |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 281 | device->driver_data = mem_device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
| 283 | /* Get the range from the _CRS */ |
| 284 | result = acpi_memory_get_device_resources(mem_device); |
| 285 | if (result) { |
| 286 | kfree(mem_device); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 287 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | } |
| 289 | |
| 290 | /* Set the device state */ |
| 291 | mem_device->state = MEMORY_POWER_ON_STATE; |
| 292 | |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 293 | result = acpi_memory_check_device(mem_device); |
| 294 | if (result) { |
| 295 | acpi_memory_device_free(mem_device); |
| 296 | return 0; |
Bjorn Helgaas | 80f20fe | 2009-06-22 20:41:25 +0000 | [diff] [blame] | 297 | } |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 298 | |
| 299 | result = acpi_memory_enable_device(mem_device); |
| 300 | if (result) { |
| 301 | dev_err(&device->dev, "acpi_memory_enable_device() error\n"); |
| 302 | acpi_memory_device_free(mem_device); |
| 303 | return -ENODEV; |
| 304 | } |
| 305 | |
| 306 | dev_dbg(&device->dev, "Memory device configured by ACPI\n"); |
| 307 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
| 309 | |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 310 | static void acpi_memory_device_remove(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | { |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 312 | struct acpi_memory_device *mem_device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
| 314 | if (!device || !acpi_driver_data(device)) |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 315 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
Jan Engelhardt | 50dd096 | 2006-10-01 00:28:50 +0200 | [diff] [blame] | 317 | mem_device = acpi_driver_data(device); |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 318 | acpi_memory_remove_memory(mem_device); |
Wen Congyang | 386e52b | 2012-11-16 02:06:06 +0100 | [diff] [blame] | 319 | acpi_memory_device_free(mem_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | } |
| 321 | |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 322 | void __init acpi_memory_hotplug_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | { |
Rafael J. Wysocki | 0a34764 | 2013-03-03 23:18:03 +0100 | [diff] [blame] | 324 | acpi_scan_add_handler_with_hotplug(&memory_device_handler, "memory"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } |