Nathan Fontenot | ab519a0 | 2009-11-24 21:10:49 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Support for dynamic reconfiguration for PCI, Memory, and CPU |
| 3 | * Hotplug and Dynamic Logical Partitioning on RPA platforms. |
| 4 | * |
| 5 | * Copyright (C) 2009 Nathan Fontenot |
| 6 | * Copyright (C) 2009 IBM Corporation |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License version |
| 10 | * 2 as published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/kref.h> |
| 15 | #include <linux/notifier.h> |
| 16 | #include <linux/proc_fs.h> |
| 17 | #include <linux/spinlock.h> |
| 18 | #include <linux/cpu.h> |
Gautham R Shenoy | b6db63d | 2009-11-26 09:58:55 +0000 | [diff] [blame] | 19 | #include "offline_states.h" |
Nathan Fontenot | ab519a0 | 2009-11-24 21:10:49 +0000 | [diff] [blame] | 20 | |
| 21 | #include <asm/prom.h> |
| 22 | #include <asm/machdep.h> |
| 23 | #include <asm/uaccess.h> |
| 24 | #include <asm/rtas.h> |
| 25 | #include <asm/pSeries_reconfig.h> |
| 26 | |
| 27 | struct cc_workarea { |
| 28 | u32 drc_index; |
| 29 | u32 zero; |
| 30 | u32 name_offset; |
| 31 | u32 prop_length; |
| 32 | u32 prop_offset; |
| 33 | }; |
| 34 | |
| 35 | static void dlpar_free_cc_property(struct property *prop) |
| 36 | { |
| 37 | kfree(prop->name); |
| 38 | kfree(prop->value); |
| 39 | kfree(prop); |
| 40 | } |
| 41 | |
| 42 | static struct property *dlpar_parse_cc_property(struct cc_workarea *ccwa) |
| 43 | { |
| 44 | struct property *prop; |
| 45 | char *name; |
| 46 | char *value; |
| 47 | |
| 48 | prop = kzalloc(sizeof(*prop), GFP_KERNEL); |
| 49 | if (!prop) |
| 50 | return NULL; |
| 51 | |
| 52 | name = (char *)ccwa + ccwa->name_offset; |
| 53 | prop->name = kstrdup(name, GFP_KERNEL); |
| 54 | |
| 55 | prop->length = ccwa->prop_length; |
| 56 | value = (char *)ccwa + ccwa->prop_offset; |
| 57 | prop->value = kzalloc(prop->length, GFP_KERNEL); |
| 58 | if (!prop->value) { |
| 59 | dlpar_free_cc_property(prop); |
| 60 | return NULL; |
| 61 | } |
| 62 | |
| 63 | memcpy(prop->value, value, prop->length); |
| 64 | return prop; |
| 65 | } |
| 66 | |
| 67 | static struct device_node *dlpar_parse_cc_node(struct cc_workarea *ccwa) |
| 68 | { |
| 69 | struct device_node *dn; |
| 70 | char *name; |
| 71 | |
| 72 | dn = kzalloc(sizeof(*dn), GFP_KERNEL); |
| 73 | if (!dn) |
| 74 | return NULL; |
| 75 | |
| 76 | /* The configure connector reported name does not contain a |
| 77 | * preceeding '/', so we allocate a buffer large enough to |
| 78 | * prepend this to the full_name. |
| 79 | */ |
| 80 | name = (char *)ccwa + ccwa->name_offset; |
| 81 | dn->full_name = kmalloc(strlen(name) + 2, GFP_KERNEL); |
| 82 | if (!dn->full_name) { |
| 83 | kfree(dn); |
| 84 | return NULL; |
| 85 | } |
| 86 | |
| 87 | sprintf(dn->full_name, "/%s", name); |
| 88 | return dn; |
| 89 | } |
| 90 | |
| 91 | static void dlpar_free_one_cc_node(struct device_node *dn) |
| 92 | { |
| 93 | struct property *prop; |
| 94 | |
| 95 | while (dn->properties) { |
| 96 | prop = dn->properties; |
| 97 | dn->properties = prop->next; |
| 98 | dlpar_free_cc_property(prop); |
| 99 | } |
| 100 | |
| 101 | kfree(dn->full_name); |
| 102 | kfree(dn); |
| 103 | } |
| 104 | |
| 105 | static void dlpar_free_cc_nodes(struct device_node *dn) |
| 106 | { |
| 107 | if (dn->child) |
| 108 | dlpar_free_cc_nodes(dn->child); |
| 109 | |
| 110 | if (dn->sibling) |
| 111 | dlpar_free_cc_nodes(dn->sibling); |
| 112 | |
| 113 | dlpar_free_one_cc_node(dn); |
| 114 | } |
| 115 | |
| 116 | #define NEXT_SIBLING 1 |
| 117 | #define NEXT_CHILD 2 |
| 118 | #define NEXT_PROPERTY 3 |
| 119 | #define PREV_PARENT 4 |
| 120 | #define MORE_MEMORY 5 |
| 121 | #define CALL_AGAIN -2 |
| 122 | #define ERR_CFG_USE -9003 |
| 123 | |
| 124 | struct device_node *dlpar_configure_connector(u32 drc_index) |
| 125 | { |
| 126 | struct device_node *dn; |
| 127 | struct device_node *first_dn = NULL; |
| 128 | struct device_node *last_dn = NULL; |
| 129 | struct property *property; |
| 130 | struct property *last_property = NULL; |
| 131 | struct cc_workarea *ccwa; |
| 132 | int cc_token; |
| 133 | int rc; |
| 134 | |
| 135 | cc_token = rtas_token("ibm,configure-connector"); |
| 136 | if (cc_token == RTAS_UNKNOWN_SERVICE) |
| 137 | return NULL; |
| 138 | |
| 139 | spin_lock(&rtas_data_buf_lock); |
| 140 | ccwa = (struct cc_workarea *)&rtas_data_buf[0]; |
| 141 | ccwa->drc_index = drc_index; |
| 142 | ccwa->zero = 0; |
| 143 | |
| 144 | rc = rtas_call(cc_token, 2, 1, NULL, rtas_data_buf, NULL); |
| 145 | while (rc) { |
| 146 | switch (rc) { |
| 147 | case NEXT_SIBLING: |
| 148 | dn = dlpar_parse_cc_node(ccwa); |
| 149 | if (!dn) |
| 150 | goto cc_error; |
| 151 | |
| 152 | dn->parent = last_dn->parent; |
| 153 | last_dn->sibling = dn; |
| 154 | last_dn = dn; |
| 155 | break; |
| 156 | |
| 157 | case NEXT_CHILD: |
| 158 | dn = dlpar_parse_cc_node(ccwa); |
| 159 | if (!dn) |
| 160 | goto cc_error; |
| 161 | |
| 162 | if (!first_dn) |
| 163 | first_dn = dn; |
| 164 | else { |
| 165 | dn->parent = last_dn; |
| 166 | if (last_dn) |
| 167 | last_dn->child = dn; |
| 168 | } |
| 169 | |
| 170 | last_dn = dn; |
| 171 | break; |
| 172 | |
| 173 | case NEXT_PROPERTY: |
| 174 | property = dlpar_parse_cc_property(ccwa); |
| 175 | if (!property) |
| 176 | goto cc_error; |
| 177 | |
| 178 | if (!last_dn->properties) |
| 179 | last_dn->properties = property; |
| 180 | else |
| 181 | last_property->next = property; |
| 182 | |
| 183 | last_property = property; |
| 184 | break; |
| 185 | |
| 186 | case PREV_PARENT: |
| 187 | last_dn = last_dn->parent; |
| 188 | break; |
| 189 | |
| 190 | case CALL_AGAIN: |
| 191 | break; |
| 192 | |
| 193 | case MORE_MEMORY: |
| 194 | case ERR_CFG_USE: |
| 195 | default: |
| 196 | printk(KERN_ERR "Unexpected Error (%d) " |
| 197 | "returned from configure-connector\n", rc); |
| 198 | goto cc_error; |
| 199 | } |
| 200 | |
| 201 | rc = rtas_call(cc_token, 2, 1, NULL, rtas_data_buf, NULL); |
| 202 | } |
| 203 | |
| 204 | spin_unlock(&rtas_data_buf_lock); |
| 205 | return first_dn; |
| 206 | |
| 207 | cc_error: |
| 208 | if (first_dn) |
| 209 | dlpar_free_cc_nodes(first_dn); |
| 210 | spin_unlock(&rtas_data_buf_lock); |
| 211 | return NULL; |
| 212 | } |
| 213 | |
| 214 | static struct device_node *derive_parent(const char *path) |
| 215 | { |
| 216 | struct device_node *parent; |
| 217 | char *last_slash; |
| 218 | |
| 219 | last_slash = strrchr(path, '/'); |
| 220 | if (last_slash == path) { |
| 221 | parent = of_find_node_by_path("/"); |
| 222 | } else { |
| 223 | char *parent_path; |
| 224 | int parent_path_len = last_slash - path + 1; |
| 225 | parent_path = kmalloc(parent_path_len, GFP_KERNEL); |
| 226 | if (!parent_path) |
| 227 | return NULL; |
| 228 | |
| 229 | strlcpy(parent_path, path, parent_path_len); |
| 230 | parent = of_find_node_by_path(parent_path); |
| 231 | kfree(parent_path); |
| 232 | } |
| 233 | |
| 234 | return parent; |
| 235 | } |
| 236 | |
| 237 | int dlpar_attach_node(struct device_node *dn) |
| 238 | { |
| 239 | struct proc_dir_entry *ent; |
| 240 | int rc; |
| 241 | |
| 242 | of_node_set_flag(dn, OF_DYNAMIC); |
| 243 | kref_init(&dn->kref); |
| 244 | dn->parent = derive_parent(dn->full_name); |
| 245 | if (!dn->parent) |
| 246 | return -ENOMEM; |
| 247 | |
| 248 | rc = blocking_notifier_call_chain(&pSeries_reconfig_chain, |
| 249 | PSERIES_RECONFIG_ADD, dn); |
| 250 | if (rc == NOTIFY_BAD) { |
| 251 | printk(KERN_ERR "Failed to add device node %s\n", |
| 252 | dn->full_name); |
| 253 | return -ENOMEM; /* For now, safe to assume kmalloc failure */ |
| 254 | } |
| 255 | |
| 256 | of_attach_node(dn); |
| 257 | |
| 258 | #ifdef CONFIG_PROC_DEVICETREE |
| 259 | ent = proc_mkdir(strrchr(dn->full_name, '/') + 1, dn->parent->pde); |
| 260 | if (ent) |
| 261 | proc_device_tree_add_node(dn, ent); |
| 262 | #endif |
| 263 | |
| 264 | of_node_put(dn->parent); |
| 265 | return 0; |
| 266 | } |
| 267 | |
| 268 | int dlpar_detach_node(struct device_node *dn) |
| 269 | { |
| 270 | struct device_node *parent = dn->parent; |
| 271 | struct property *prop = dn->properties; |
| 272 | |
| 273 | #ifdef CONFIG_PROC_DEVICETREE |
| 274 | while (prop) { |
| 275 | remove_proc_entry(prop->name, dn->pde); |
| 276 | prop = prop->next; |
| 277 | } |
| 278 | |
| 279 | if (dn->pde) |
| 280 | remove_proc_entry(dn->pde->name, parent->pde); |
| 281 | #endif |
| 282 | |
| 283 | blocking_notifier_call_chain(&pSeries_reconfig_chain, |
| 284 | PSERIES_RECONFIG_REMOVE, dn); |
| 285 | of_detach_node(dn); |
| 286 | of_node_put(dn); /* Must decrement the refcount */ |
| 287 | |
| 288 | return 0; |
| 289 | } |
| 290 | |
Gautham R Shenoy | b6db63d | 2009-11-26 09:58:55 +0000 | [diff] [blame] | 291 | int online_node_cpus(struct device_node *dn) |
| 292 | { |
| 293 | int rc = 0; |
| 294 | unsigned int cpu; |
| 295 | int len, nthreads, i; |
| 296 | const u32 *intserv; |
| 297 | |
| 298 | intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len); |
| 299 | if (!intserv) |
| 300 | return -EINVAL; |
| 301 | |
| 302 | nthreads = len / sizeof(u32); |
| 303 | |
| 304 | cpu_maps_update_begin(); |
| 305 | for (i = 0; i < nthreads; i++) { |
| 306 | for_each_present_cpu(cpu) { |
| 307 | if (get_hard_smp_processor_id(cpu) != intserv[i]) |
| 308 | continue; |
| 309 | BUG_ON(get_cpu_current_state(cpu) |
| 310 | != CPU_STATE_OFFLINE); |
| 311 | cpu_maps_update_done(); |
| 312 | rc = cpu_up(cpu); |
| 313 | if (rc) |
| 314 | goto out; |
| 315 | cpu_maps_update_begin(); |
| 316 | |
| 317 | break; |
| 318 | } |
| 319 | if (cpu == num_possible_cpus()) |
| 320 | printk(KERN_WARNING "Could not find cpu to online " |
| 321 | "with physical id 0x%x\n", intserv[i]); |
| 322 | } |
| 323 | cpu_maps_update_done(); |
| 324 | |
| 325 | out: |
| 326 | return rc; |
| 327 | |
| 328 | } |
| 329 | |
| 330 | int offline_node_cpus(struct device_node *dn) |
| 331 | { |
| 332 | int rc = 0; |
| 333 | unsigned int cpu; |
| 334 | int len, nthreads, i; |
| 335 | const u32 *intserv; |
| 336 | |
| 337 | intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len); |
| 338 | if (!intserv) |
| 339 | return -EINVAL; |
| 340 | |
| 341 | nthreads = len / sizeof(u32); |
| 342 | |
| 343 | cpu_maps_update_begin(); |
| 344 | for (i = 0; i < nthreads; i++) { |
| 345 | for_each_present_cpu(cpu) { |
| 346 | if (get_hard_smp_processor_id(cpu) != intserv[i]) |
| 347 | continue; |
| 348 | |
| 349 | if (get_cpu_current_state(cpu) == CPU_STATE_OFFLINE) |
| 350 | break; |
| 351 | |
| 352 | if (get_cpu_current_state(cpu) == CPU_STATE_ONLINE) { |
| 353 | cpu_maps_update_done(); |
| 354 | rc = cpu_down(cpu); |
| 355 | if (rc) |
| 356 | goto out; |
| 357 | cpu_maps_update_begin(); |
| 358 | break; |
| 359 | |
| 360 | } |
| 361 | |
| 362 | /* |
| 363 | * The cpu is in CPU_STATE_INACTIVE. |
| 364 | * Upgrade it's state to CPU_STATE_OFFLINE. |
| 365 | */ |
| 366 | set_preferred_offline_state(cpu, CPU_STATE_OFFLINE); |
| 367 | BUG_ON(plpar_hcall_norets(H_PROD, intserv[i]) |
| 368 | != H_SUCCESS); |
| 369 | __cpu_die(cpu); |
| 370 | break; |
| 371 | } |
| 372 | if (cpu == num_possible_cpus()) |
| 373 | printk(KERN_WARNING "Could not find cpu to offline " |
| 374 | "with physical id 0x%x\n", intserv[i]); |
| 375 | } |
| 376 | cpu_maps_update_done(); |
| 377 | |
| 378 | out: |
| 379 | return rc; |
| 380 | |
| 381 | } |
| 382 | |
Nathan Fontenot | ab519a0 | 2009-11-24 21:10:49 +0000 | [diff] [blame] | 383 | #define DR_ENTITY_SENSE 9003 |
| 384 | #define DR_ENTITY_PRESENT 1 |
| 385 | #define DR_ENTITY_UNUSABLE 2 |
| 386 | #define ALLOCATION_STATE 9003 |
| 387 | #define ALLOC_UNUSABLE 0 |
| 388 | #define ALLOC_USABLE 1 |
| 389 | #define ISOLATION_STATE 9001 |
| 390 | #define ISOLATE 0 |
| 391 | #define UNISOLATE 1 |
| 392 | |
| 393 | int dlpar_acquire_drc(u32 drc_index) |
| 394 | { |
| 395 | int dr_status, rc; |
| 396 | |
| 397 | rc = rtas_call(rtas_token("get-sensor-state"), 2, 2, &dr_status, |
| 398 | DR_ENTITY_SENSE, drc_index); |
| 399 | if (rc || dr_status != DR_ENTITY_UNUSABLE) |
| 400 | return -1; |
| 401 | |
| 402 | rc = rtas_set_indicator(ALLOCATION_STATE, drc_index, ALLOC_USABLE); |
| 403 | if (rc) |
| 404 | return rc; |
| 405 | |
| 406 | rc = rtas_set_indicator(ISOLATION_STATE, drc_index, UNISOLATE); |
| 407 | if (rc) { |
| 408 | rtas_set_indicator(ALLOCATION_STATE, drc_index, ALLOC_UNUSABLE); |
| 409 | return rc; |
| 410 | } |
| 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | int dlpar_release_drc(u32 drc_index) |
| 416 | { |
| 417 | int dr_status, rc; |
| 418 | |
| 419 | rc = rtas_call(rtas_token("get-sensor-state"), 2, 2, &dr_status, |
| 420 | DR_ENTITY_SENSE, drc_index); |
| 421 | if (rc || dr_status != DR_ENTITY_PRESENT) |
| 422 | return -1; |
| 423 | |
| 424 | rc = rtas_set_indicator(ISOLATION_STATE, drc_index, ISOLATE); |
| 425 | if (rc) |
| 426 | return rc; |
| 427 | |
| 428 | rc = rtas_set_indicator(ALLOCATION_STATE, drc_index, ALLOC_UNUSABLE); |
| 429 | if (rc) { |
| 430 | rtas_set_indicator(ISOLATION_STATE, drc_index, UNISOLATE); |
| 431 | return rc; |
| 432 | } |
| 433 | |
| 434 | return 0; |
| 435 | } |
| 436 | |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 437 | #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE |
Nathan Fontenot | ab519a0 | 2009-11-24 21:10:49 +0000 | [diff] [blame] | 438 | |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 439 | static DEFINE_MUTEX(pseries_cpu_hotplug_mutex); |
| 440 | |
| 441 | void cpu_hotplug_driver_lock() |
| 442 | { |
| 443 | mutex_lock(&pseries_cpu_hotplug_mutex); |
| 444 | } |
| 445 | |
| 446 | void cpu_hotplug_driver_unlock() |
| 447 | { |
| 448 | mutex_unlock(&pseries_cpu_hotplug_mutex); |
| 449 | } |
| 450 | |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 451 | static ssize_t dlpar_cpu_probe(const char *buf, size_t count) |
| 452 | { |
| 453 | struct device_node *dn; |
| 454 | unsigned long drc_index; |
| 455 | char *cpu_name; |
| 456 | int rc; |
| 457 | |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 458 | cpu_hotplug_driver_lock(); |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 459 | rc = strict_strtoul(buf, 0, &drc_index); |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 460 | if (rc) { |
| 461 | rc = -EINVAL; |
| 462 | goto out; |
| 463 | } |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 464 | |
| 465 | dn = dlpar_configure_connector(drc_index); |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 466 | if (!dn) { |
| 467 | rc = -EINVAL; |
| 468 | goto out; |
| 469 | } |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 470 | |
| 471 | /* configure-connector reports cpus as living in the base |
| 472 | * directory of the device tree. CPUs actually live in the |
| 473 | * cpus directory so we need to fixup the full_name. |
| 474 | */ |
| 475 | cpu_name = kzalloc(strlen(dn->full_name) + strlen("/cpus") + 1, |
| 476 | GFP_KERNEL); |
| 477 | if (!cpu_name) { |
| 478 | dlpar_free_cc_nodes(dn); |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 479 | rc = -ENOMEM; |
| 480 | goto out; |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | sprintf(cpu_name, "/cpus%s", dn->full_name); |
| 484 | kfree(dn->full_name); |
| 485 | dn->full_name = cpu_name; |
| 486 | |
| 487 | rc = dlpar_acquire_drc(drc_index); |
| 488 | if (rc) { |
| 489 | dlpar_free_cc_nodes(dn); |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 490 | rc = -EINVAL; |
| 491 | goto out; |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 492 | } |
| 493 | |
| 494 | rc = dlpar_attach_node(dn); |
| 495 | if (rc) { |
| 496 | dlpar_release_drc(drc_index); |
| 497 | dlpar_free_cc_nodes(dn); |
| 498 | } |
| 499 | |
Gautham R Shenoy | b6db63d | 2009-11-26 09:58:55 +0000 | [diff] [blame] | 500 | rc = online_node_cpus(dn); |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 501 | out: |
| 502 | cpu_hotplug_driver_unlock(); |
Gautham R Shenoy | b6db63d | 2009-11-26 09:58:55 +0000 | [diff] [blame] | 503 | |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 504 | return rc ? rc : count; |
| 505 | } |
| 506 | |
| 507 | static ssize_t dlpar_cpu_release(const char *buf, size_t count) |
| 508 | { |
| 509 | struct device_node *dn; |
| 510 | const u32 *drc_index; |
| 511 | int rc; |
| 512 | |
| 513 | dn = of_find_node_by_path(buf); |
| 514 | if (!dn) |
| 515 | return -EINVAL; |
| 516 | |
| 517 | drc_index = of_get_property(dn, "ibm,my-drc-index", NULL); |
| 518 | if (!drc_index) { |
| 519 | of_node_put(dn); |
| 520 | return -EINVAL; |
| 521 | } |
| 522 | |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 523 | cpu_hotplug_driver_lock(); |
Gautham R Shenoy | b6db63d | 2009-11-26 09:58:55 +0000 | [diff] [blame] | 524 | rc = offline_node_cpus(dn); |
| 525 | if (rc) { |
| 526 | of_node_put(dn); |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 527 | rc = -EINVAL; |
| 528 | goto out; |
Gautham R Shenoy | b6db63d | 2009-11-26 09:58:55 +0000 | [diff] [blame] | 529 | } |
| 530 | |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 531 | rc = dlpar_release_drc(*drc_index); |
| 532 | if (rc) { |
| 533 | of_node_put(dn); |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 534 | goto out; |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | rc = dlpar_detach_node(dn); |
| 538 | if (rc) { |
| 539 | dlpar_acquire_drc(*drc_index); |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 540 | goto out; |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | of_node_put(dn); |
Gautham R Shenoy | 51badeb | 2009-11-26 09:59:05 +0000 | [diff] [blame^] | 544 | out: |
| 545 | cpu_hotplug_driver_unlock(); |
| 546 | return rc ? rc : count; |
Nathan Fontenot | 1a8061c | 2009-11-24 21:13:32 +0000 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | static int __init pseries_dlpar_init(void) |
| 550 | { |
| 551 | ppc_md.cpu_probe = dlpar_cpu_probe; |
| 552 | ppc_md.cpu_release = dlpar_cpu_release; |
| 553 | |
| 554 | return 0; |
| 555 | } |
| 556 | machine_device_initcall(pseries, pseries_dlpar_init); |
| 557 | |
| 558 | #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ |