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Commit | Line | Data |
---|---|---|
ab519a01 NF |
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 | ||
999e2dad NF |
13 | #define pr_fmt(fmt) "dlpar: " fmt |
14 | ||
ab519a01 | 15 | #include <linux/kernel.h> |
ab519a01 | 16 | #include <linux/notifier.h> |
ab519a01 NF |
17 | #include <linux/spinlock.h> |
18 | #include <linux/cpu.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
1cf3d8b3 | 20 | #include <linux/of.h> |
b6db63d1 | 21 | #include "offline_states.h" |
1217d34b | 22 | #include "pseries.h" |
ab519a01 NF |
23 | |
24 | #include <asm/prom.h> | |
25 | #include <asm/machdep.h> | |
26 | #include <asm/uaccess.h> | |
27 | #include <asm/rtas.h> | |
ab519a01 NF |
28 | |
29 | struct cc_workarea { | |
d6f1e7ab BR |
30 | __be32 drc_index; |
31 | __be32 zero; | |
32 | __be32 name_offset; | |
33 | __be32 prop_length; | |
34 | __be32 prop_offset; | |
ab519a01 NF |
35 | }; |
36 | ||
20648974 | 37 | void dlpar_free_cc_property(struct property *prop) |
ab519a01 NF |
38 | { |
39 | kfree(prop->name); | |
40 | kfree(prop->value); | |
41 | kfree(prop); | |
42 | } | |
43 | ||
44 | static struct property *dlpar_parse_cc_property(struct cc_workarea *ccwa) | |
45 | { | |
46 | struct property *prop; | |
47 | char *name; | |
48 | char *value; | |
49 | ||
50 | prop = kzalloc(sizeof(*prop), GFP_KERNEL); | |
51 | if (!prop) | |
52 | return NULL; | |
53 | ||
d6f1e7ab | 54 | name = (char *)ccwa + be32_to_cpu(ccwa->name_offset); |
ab519a01 NF |
55 | prop->name = kstrdup(name, GFP_KERNEL); |
56 | ||
d6f1e7ab BR |
57 | prop->length = be32_to_cpu(ccwa->prop_length); |
58 | value = (char *)ccwa + be32_to_cpu(ccwa->prop_offset); | |
e72ed6b5 | 59 | prop->value = kmemdup(value, prop->length, GFP_KERNEL); |
ab519a01 NF |
60 | if (!prop->value) { |
61 | dlpar_free_cc_property(prop); | |
62 | return NULL; | |
63 | } | |
64 | ||
ab519a01 NF |
65 | return prop; |
66 | } | |
67 | ||
8d5ff320 TD |
68 | static struct device_node *dlpar_parse_cc_node(struct cc_workarea *ccwa, |
69 | const char *path) | |
ab519a01 NF |
70 | { |
71 | struct device_node *dn; | |
72 | char *name; | |
73 | ||
8d5ff320 TD |
74 | /* If parent node path is "/" advance path to NULL terminator to |
75 | * prevent double leading slashs in full_name. | |
76 | */ | |
77 | if (!path[1]) | |
78 | path++; | |
79 | ||
ab519a01 NF |
80 | dn = kzalloc(sizeof(*dn), GFP_KERNEL); |
81 | if (!dn) | |
82 | return NULL; | |
83 | ||
d6f1e7ab | 84 | name = (char *)ccwa + be32_to_cpu(ccwa->name_offset); |
8d5ff320 | 85 | dn->full_name = kasprintf(GFP_KERNEL, "%s/%s", path, name); |
ab519a01 NF |
86 | if (!dn->full_name) { |
87 | kfree(dn); | |
88 | return NULL; | |
89 | } | |
90 | ||
1578cb76 | 91 | of_node_set_flag(dn, OF_DYNAMIC); |
97a9a717 | 92 | of_node_init(dn); |
1578cb76 | 93 | |
ab519a01 NF |
94 | return dn; |
95 | } | |
96 | ||
97 | static void dlpar_free_one_cc_node(struct device_node *dn) | |
98 | { | |
99 | struct property *prop; | |
100 | ||
101 | while (dn->properties) { | |
102 | prop = dn->properties; | |
103 | dn->properties = prop->next; | |
104 | dlpar_free_cc_property(prop); | |
105 | } | |
106 | ||
107 | kfree(dn->full_name); | |
108 | kfree(dn); | |
109 | } | |
110 | ||
20648974 | 111 | void dlpar_free_cc_nodes(struct device_node *dn) |
ab519a01 NF |
112 | { |
113 | if (dn->child) | |
114 | dlpar_free_cc_nodes(dn->child); | |
115 | ||
116 | if (dn->sibling) | |
117 | dlpar_free_cc_nodes(dn->sibling); | |
118 | ||
119 | dlpar_free_one_cc_node(dn); | |
120 | } | |
121 | ||
9c740025 | 122 | #define COMPLETE 0 |
ab519a01 NF |
123 | #define NEXT_SIBLING 1 |
124 | #define NEXT_CHILD 2 | |
125 | #define NEXT_PROPERTY 3 | |
126 | #define PREV_PARENT 4 | |
127 | #define MORE_MEMORY 5 | |
128 | #define CALL_AGAIN -2 | |
129 | #define ERR_CFG_USE -9003 | |
130 | ||
d6f1e7ab | 131 | struct device_node *dlpar_configure_connector(__be32 drc_index, |
8d5ff320 | 132 | struct device_node *parent) |
ab519a01 NF |
133 | { |
134 | struct device_node *dn; | |
135 | struct device_node *first_dn = NULL; | |
136 | struct device_node *last_dn = NULL; | |
137 | struct property *property; | |
138 | struct property *last_property = NULL; | |
139 | struct cc_workarea *ccwa; | |
93f68f1e | 140 | char *data_buf; |
8d5ff320 | 141 | const char *parent_path = parent->full_name; |
ab519a01 | 142 | int cc_token; |
93f68f1e | 143 | int rc = -1; |
ab519a01 NF |
144 | |
145 | cc_token = rtas_token("ibm,configure-connector"); | |
146 | if (cc_token == RTAS_UNKNOWN_SERVICE) | |
147 | return NULL; | |
148 | ||
93f68f1e NF |
149 | data_buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL); |
150 | if (!data_buf) | |
151 | return NULL; | |
152 | ||
153 | ccwa = (struct cc_workarea *)&data_buf[0]; | |
ab519a01 NF |
154 | ccwa->drc_index = drc_index; |
155 | ccwa->zero = 0; | |
156 | ||
93f68f1e NF |
157 | do { |
158 | /* Since we release the rtas_data_buf lock between configure | |
159 | * connector calls we want to re-populate the rtas_data_buffer | |
160 | * with the contents of the previous call. | |
161 | */ | |
162 | spin_lock(&rtas_data_buf_lock); | |
163 | ||
164 | memcpy(rtas_data_buf, data_buf, RTAS_DATA_BUF_SIZE); | |
165 | rc = rtas_call(cc_token, 2, 1, NULL, rtas_data_buf, NULL); | |
166 | memcpy(data_buf, rtas_data_buf, RTAS_DATA_BUF_SIZE); | |
167 | ||
168 | spin_unlock(&rtas_data_buf_lock); | |
169 | ||
ab519a01 | 170 | switch (rc) { |
9c740025 AB |
171 | case COMPLETE: |
172 | break; | |
173 | ||
ab519a01 | 174 | case NEXT_SIBLING: |
8d5ff320 | 175 | dn = dlpar_parse_cc_node(ccwa, parent_path); |
ab519a01 NF |
176 | if (!dn) |
177 | goto cc_error; | |
178 | ||
179 | dn->parent = last_dn->parent; | |
180 | last_dn->sibling = dn; | |
181 | last_dn = dn; | |
182 | break; | |
183 | ||
184 | case NEXT_CHILD: | |
8d5ff320 TD |
185 | if (first_dn) |
186 | parent_path = last_dn->full_name; | |
187 | ||
188 | dn = dlpar_parse_cc_node(ccwa, parent_path); | |
ab519a01 NF |
189 | if (!dn) |
190 | goto cc_error; | |
191 | ||
8d5ff320 TD |
192 | if (!first_dn) { |
193 | dn->parent = parent; | |
ab519a01 | 194 | first_dn = dn; |
8d5ff320 | 195 | } else { |
ab519a01 NF |
196 | dn->parent = last_dn; |
197 | if (last_dn) | |
198 | last_dn->child = dn; | |
199 | } | |
200 | ||
201 | last_dn = dn; | |
202 | break; | |
203 | ||
204 | case NEXT_PROPERTY: | |
205 | property = dlpar_parse_cc_property(ccwa); | |
206 | if (!property) | |
207 | goto cc_error; | |
208 | ||
209 | if (!last_dn->properties) | |
210 | last_dn->properties = property; | |
211 | else | |
212 | last_property->next = property; | |
213 | ||
214 | last_property = property; | |
215 | break; | |
216 | ||
217 | case PREV_PARENT: | |
218 | last_dn = last_dn->parent; | |
8d5ff320 | 219 | parent_path = last_dn->parent->full_name; |
ab519a01 NF |
220 | break; |
221 | ||
222 | case CALL_AGAIN: | |
223 | break; | |
224 | ||
225 | case MORE_MEMORY: | |
226 | case ERR_CFG_USE: | |
227 | default: | |
228 | printk(KERN_ERR "Unexpected Error (%d) " | |
229 | "returned from configure-connector\n", rc); | |
230 | goto cc_error; | |
231 | } | |
93f68f1e | 232 | } while (rc); |
ab519a01 | 233 | |
93f68f1e NF |
234 | cc_error: |
235 | kfree(data_buf); | |
236 | ||
237 | if (rc) { | |
238 | if (first_dn) | |
239 | dlpar_free_cc_nodes(first_dn); | |
240 | ||
241 | return NULL; | |
ab519a01 NF |
242 | } |
243 | ||
ab519a01 | 244 | return first_dn; |
ab519a01 NF |
245 | } |
246 | ||
247 | static struct device_node *derive_parent(const char *path) | |
248 | { | |
249 | struct device_node *parent; | |
250 | char *last_slash; | |
251 | ||
252 | last_slash = strrchr(path, '/'); | |
253 | if (last_slash == path) { | |
254 | parent = of_find_node_by_path("/"); | |
255 | } else { | |
256 | char *parent_path; | |
257 | int parent_path_len = last_slash - path + 1; | |
258 | parent_path = kmalloc(parent_path_len, GFP_KERNEL); | |
259 | if (!parent_path) | |
260 | return NULL; | |
261 | ||
262 | strlcpy(parent_path, path, parent_path_len); | |
263 | parent = of_find_node_by_path(parent_path); | |
264 | kfree(parent_path); | |
265 | } | |
266 | ||
267 | return parent; | |
268 | } | |
269 | ||
270 | int dlpar_attach_node(struct device_node *dn) | |
271 | { | |
ab519a01 NF |
272 | int rc; |
273 | ||
ab519a01 NF |
274 | dn->parent = derive_parent(dn->full_name); |
275 | if (!dn->parent) | |
276 | return -ENOMEM; | |
277 | ||
1cf3d8b3 | 278 | rc = of_attach_node(dn); |
3aef19f0 | 279 | if (rc) { |
ab519a01 NF |
280 | printk(KERN_ERR "Failed to add device node %s\n", |
281 | dn->full_name); | |
3aef19f0 | 282 | return rc; |
ab519a01 NF |
283 | } |
284 | ||
ab519a01 NF |
285 | of_node_put(dn->parent); |
286 | return 0; | |
287 | } | |
288 | ||
289 | int dlpar_detach_node(struct device_node *dn) | |
290 | { | |
5935ff43 | 291 | struct device_node *child; |
1cf3d8b3 | 292 | int rc; |
ab519a01 | 293 | |
5935ff43 TD |
294 | child = of_get_next_child(dn, NULL); |
295 | while (child) { | |
296 | dlpar_detach_node(child); | |
297 | child = of_get_next_child(dn, child); | |
298 | } | |
299 | ||
1cf3d8b3 NF |
300 | rc = of_detach_node(dn); |
301 | if (rc) | |
302 | return rc; | |
303 | ||
304 | of_node_put(dn); /* Must decrement the refcount */ | |
ab519a01 NF |
305 | return 0; |
306 | } | |
307 | ||
308 | #define DR_ENTITY_SENSE 9003 | |
309 | #define DR_ENTITY_PRESENT 1 | |
310 | #define DR_ENTITY_UNUSABLE 2 | |
311 | #define ALLOCATION_STATE 9003 | |
312 | #define ALLOC_UNUSABLE 0 | |
313 | #define ALLOC_USABLE 1 | |
314 | #define ISOLATION_STATE 9001 | |
315 | #define ISOLATE 0 | |
316 | #define UNISOLATE 1 | |
317 | ||
318 | int dlpar_acquire_drc(u32 drc_index) | |
319 | { | |
320 | int dr_status, rc; | |
321 | ||
322 | rc = rtas_call(rtas_token("get-sensor-state"), 2, 2, &dr_status, | |
323 | DR_ENTITY_SENSE, drc_index); | |
324 | if (rc || dr_status != DR_ENTITY_UNUSABLE) | |
325 | return -1; | |
326 | ||
327 | rc = rtas_set_indicator(ALLOCATION_STATE, drc_index, ALLOC_USABLE); | |
328 | if (rc) | |
329 | return rc; | |
330 | ||
331 | rc = rtas_set_indicator(ISOLATION_STATE, drc_index, UNISOLATE); | |
332 | if (rc) { | |
333 | rtas_set_indicator(ALLOCATION_STATE, drc_index, ALLOC_UNUSABLE); | |
334 | return rc; | |
335 | } | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
340 | int dlpar_release_drc(u32 drc_index) | |
341 | { | |
342 | int dr_status, rc; | |
343 | ||
344 | rc = rtas_call(rtas_token("get-sensor-state"), 2, 2, &dr_status, | |
345 | DR_ENTITY_SENSE, drc_index); | |
346 | if (rc || dr_status != DR_ENTITY_PRESENT) | |
347 | return -1; | |
348 | ||
349 | rc = rtas_set_indicator(ISOLATION_STATE, drc_index, ISOLATE); | |
350 | if (rc) | |
351 | return rc; | |
352 | ||
353 | rc = rtas_set_indicator(ALLOCATION_STATE, drc_index, ALLOC_UNUSABLE); | |
354 | if (rc) { | |
355 | rtas_set_indicator(ISOLATION_STATE, drc_index, UNISOLATE); | |
356 | return rc; | |
357 | } | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
1a8061c4 | 362 | #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE |
ab519a01 | 363 | |
275a64f6 NF |
364 | static int dlpar_online_cpu(struct device_node *dn) |
365 | { | |
366 | int rc = 0; | |
367 | unsigned int cpu; | |
368 | int len, nthreads, i; | |
822e7122 TF |
369 | const __be32 *intserv; |
370 | u32 thread; | |
275a64f6 NF |
371 | |
372 | intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len); | |
373 | if (!intserv) | |
374 | return -EINVAL; | |
375 | ||
376 | nthreads = len / sizeof(u32); | |
377 | ||
378 | cpu_maps_update_begin(); | |
379 | for (i = 0; i < nthreads; i++) { | |
822e7122 | 380 | thread = be32_to_cpu(intserv[i]); |
275a64f6 | 381 | for_each_present_cpu(cpu) { |
822e7122 | 382 | if (get_hard_smp_processor_id(cpu) != thread) |
275a64f6 NF |
383 | continue; |
384 | BUG_ON(get_cpu_current_state(cpu) | |
385 | != CPU_STATE_OFFLINE); | |
386 | cpu_maps_update_done(); | |
10ccaf17 | 387 | rc = device_online(get_cpu_device(cpu)); |
275a64f6 NF |
388 | if (rc) |
389 | goto out; | |
390 | cpu_maps_update_begin(); | |
391 | ||
392 | break; | |
393 | } | |
394 | if (cpu == num_possible_cpus()) | |
395 | printk(KERN_WARNING "Could not find cpu to online " | |
822e7122 | 396 | "with physical id 0x%x\n", thread); |
275a64f6 NF |
397 | } |
398 | cpu_maps_update_done(); | |
399 | ||
400 | out: | |
401 | return rc; | |
402 | ||
403 | } | |
404 | ||
1a8061c4 NF |
405 | static ssize_t dlpar_cpu_probe(const char *buf, size_t count) |
406 | { | |
8d5ff320 | 407 | struct device_node *dn, *parent; |
1618bd53 | 408 | u32 drc_index; |
1a8061c4 NF |
409 | int rc; |
410 | ||
1618bd53 | 411 | rc = kstrtou32(buf, 0, &drc_index); |
6dedcca6 TK |
412 | if (rc) |
413 | return -EINVAL; | |
1a8061c4 | 414 | |
8d5ff320 | 415 | parent = of_find_node_by_path("/cpus"); |
6dedcca6 TK |
416 | if (!parent) |
417 | return -ENODEV; | |
1a8061c4 | 418 | |
d6f1e7ab | 419 | dn = dlpar_configure_connector(cpu_to_be32(drc_index), parent); |
6dedcca6 TK |
420 | if (!dn) |
421 | return -EINVAL; | |
1a8061c4 | 422 | |
8d5ff320 | 423 | of_node_put(parent); |
1a8061c4 NF |
424 | |
425 | rc = dlpar_acquire_drc(drc_index); | |
426 | if (rc) { | |
427 | dlpar_free_cc_nodes(dn); | |
6dedcca6 | 428 | return -EINVAL; |
1a8061c4 NF |
429 | } |
430 | ||
431 | rc = dlpar_attach_node(dn); | |
432 | if (rc) { | |
433 | dlpar_release_drc(drc_index); | |
434 | dlpar_free_cc_nodes(dn); | |
6dedcca6 | 435 | return rc; |
1a8061c4 NF |
436 | } |
437 | ||
275a64f6 | 438 | rc = dlpar_online_cpu(dn); |
6dedcca6 TK |
439 | if (rc) |
440 | return rc; | |
b6db63d1 | 441 | |
6dedcca6 | 442 | return count; |
1a8061c4 NF |
443 | } |
444 | ||
275a64f6 NF |
445 | static int dlpar_offline_cpu(struct device_node *dn) |
446 | { | |
447 | int rc = 0; | |
448 | unsigned int cpu; | |
449 | int len, nthreads, i; | |
e36d1227 TF |
450 | const __be32 *intserv; |
451 | u32 thread; | |
275a64f6 NF |
452 | |
453 | intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len); | |
454 | if (!intserv) | |
455 | return -EINVAL; | |
456 | ||
457 | nthreads = len / sizeof(u32); | |
458 | ||
459 | cpu_maps_update_begin(); | |
460 | for (i = 0; i < nthreads; i++) { | |
e36d1227 | 461 | thread = be32_to_cpu(intserv[i]); |
275a64f6 | 462 | for_each_present_cpu(cpu) { |
e36d1227 | 463 | if (get_hard_smp_processor_id(cpu) != thread) |
275a64f6 NF |
464 | continue; |
465 | ||
466 | if (get_cpu_current_state(cpu) == CPU_STATE_OFFLINE) | |
467 | break; | |
468 | ||
469 | if (get_cpu_current_state(cpu) == CPU_STATE_ONLINE) { | |
ceddee23 | 470 | set_preferred_offline_state(cpu, CPU_STATE_OFFLINE); |
275a64f6 | 471 | cpu_maps_update_done(); |
10ccaf17 | 472 | rc = device_offline(get_cpu_device(cpu)); |
275a64f6 NF |
473 | if (rc) |
474 | goto out; | |
475 | cpu_maps_update_begin(); | |
476 | break; | |
477 | ||
478 | } | |
479 | ||
480 | /* | |
481 | * The cpu is in CPU_STATE_INACTIVE. | |
482 | * Upgrade it's state to CPU_STATE_OFFLINE. | |
483 | */ | |
484 | set_preferred_offline_state(cpu, CPU_STATE_OFFLINE); | |
e36d1227 | 485 | BUG_ON(plpar_hcall_norets(H_PROD, thread) |
275a64f6 NF |
486 | != H_SUCCESS); |
487 | __cpu_die(cpu); | |
488 | break; | |
489 | } | |
490 | if (cpu == num_possible_cpus()) | |
491 | printk(KERN_WARNING "Could not find cpu to offline " | |
e36d1227 | 492 | "with physical id 0x%x\n", thread); |
275a64f6 NF |
493 | } |
494 | cpu_maps_update_done(); | |
495 | ||
496 | out: | |
497 | return rc; | |
498 | ||
499 | } | |
500 | ||
1a8061c4 NF |
501 | static ssize_t dlpar_cpu_release(const char *buf, size_t count) |
502 | { | |
503 | struct device_node *dn; | |
e36d1227 | 504 | u32 drc_index; |
1a8061c4 NF |
505 | int rc; |
506 | ||
507 | dn = of_find_node_by_path(buf); | |
508 | if (!dn) | |
509 | return -EINVAL; | |
510 | ||
e36d1227 TF |
511 | rc = of_property_read_u32(dn, "ibm,my-drc-index", &drc_index); |
512 | if (rc) { | |
1a8061c4 NF |
513 | of_node_put(dn); |
514 | return -EINVAL; | |
515 | } | |
516 | ||
275a64f6 | 517 | rc = dlpar_offline_cpu(dn); |
b6db63d1 GS |
518 | if (rc) { |
519 | of_node_put(dn); | |
6dedcca6 | 520 | return -EINVAL; |
b6db63d1 GS |
521 | } |
522 | ||
e36d1227 | 523 | rc = dlpar_release_drc(drc_index); |
1a8061c4 NF |
524 | if (rc) { |
525 | of_node_put(dn); | |
6dedcca6 | 526 | return rc; |
1a8061c4 NF |
527 | } |
528 | ||
529 | rc = dlpar_detach_node(dn); | |
530 | if (rc) { | |
e36d1227 | 531 | dlpar_acquire_drc(drc_index); |
6dedcca6 | 532 | return rc; |
1a8061c4 NF |
533 | } |
534 | ||
535 | of_node_put(dn); | |
6dedcca6 TK |
536 | |
537 | return count; | |
1a8061c4 NF |
538 | } |
539 | ||
999e2dad NF |
540 | #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ |
541 | ||
542 | static int handle_dlpar_errorlog(struct pseries_hp_errorlog *hp_elog) | |
543 | { | |
544 | int rc; | |
545 | ||
546 | /* pseries error logs are in BE format, convert to cpu type */ | |
547 | switch (hp_elog->id_type) { | |
548 | case PSERIES_HP_ELOG_ID_DRC_COUNT: | |
549 | hp_elog->_drc_u.drc_count = | |
550 | be32_to_cpu(hp_elog->_drc_u.drc_count); | |
551 | break; | |
552 | case PSERIES_HP_ELOG_ID_DRC_INDEX: | |
553 | hp_elog->_drc_u.drc_index = | |
554 | be32_to_cpu(hp_elog->_drc_u.drc_index); | |
555 | } | |
556 | ||
557 | switch (hp_elog->resource) { | |
558 | case PSERIES_HP_ELOG_RESOURCE_MEM: | |
559 | rc = dlpar_memory(hp_elog); | |
560 | break; | |
561 | default: | |
562 | pr_warn_ratelimited("Invalid resource (%d) specified\n", | |
563 | hp_elog->resource); | |
564 | rc = -EINVAL; | |
565 | } | |
566 | ||
567 | return rc; | |
568 | } | |
569 | ||
570 | static ssize_t dlpar_store(struct class *class, struct class_attribute *attr, | |
571 | const char *buf, size_t count) | |
572 | { | |
573 | struct pseries_hp_errorlog *hp_elog; | |
574 | const char *arg; | |
575 | int rc; | |
576 | ||
577 | hp_elog = kzalloc(sizeof(*hp_elog), GFP_KERNEL); | |
578 | if (!hp_elog) { | |
579 | rc = -ENOMEM; | |
580 | goto dlpar_store_out; | |
581 | } | |
582 | ||
583 | /* Parse out the request from the user, this will be in the form | |
584 | * <resource> <action> <id_type> <id> | |
585 | */ | |
586 | arg = buf; | |
587 | if (!strncmp(arg, "memory", 6)) { | |
588 | hp_elog->resource = PSERIES_HP_ELOG_RESOURCE_MEM; | |
589 | arg += strlen("memory "); | |
590 | } else { | |
591 | pr_err("Invalid resource specified: \"%s\"\n", buf); | |
592 | rc = -EINVAL; | |
593 | goto dlpar_store_out; | |
594 | } | |
595 | ||
596 | if (!strncmp(arg, "add", 3)) { | |
597 | hp_elog->action = PSERIES_HP_ELOG_ACTION_ADD; | |
598 | arg += strlen("add "); | |
599 | } else if (!strncmp(arg, "remove", 6)) { | |
600 | hp_elog->action = PSERIES_HP_ELOG_ACTION_REMOVE; | |
601 | arg += strlen("remove "); | |
602 | } else { | |
603 | pr_err("Invalid action specified: \"%s\"\n", buf); | |
604 | rc = -EINVAL; | |
605 | goto dlpar_store_out; | |
606 | } | |
607 | ||
608 | if (!strncmp(arg, "index", 5)) { | |
609 | u32 index; | |
610 | ||
611 | hp_elog->id_type = PSERIES_HP_ELOG_ID_DRC_INDEX; | |
612 | arg += strlen("index "); | |
613 | if (kstrtou32(arg, 0, &index)) { | |
614 | rc = -EINVAL; | |
615 | pr_err("Invalid drc_index specified: \"%s\"\n", buf); | |
616 | goto dlpar_store_out; | |
617 | } | |
618 | ||
619 | hp_elog->_drc_u.drc_index = cpu_to_be32(index); | |
620 | } else if (!strncmp(arg, "count", 5)) { | |
621 | u32 count; | |
622 | ||
623 | hp_elog->id_type = PSERIES_HP_ELOG_ID_DRC_COUNT; | |
624 | arg += strlen("count "); | |
625 | if (kstrtou32(arg, 0, &count)) { | |
626 | rc = -EINVAL; | |
627 | pr_err("Invalid count specified: \"%s\"\n", buf); | |
628 | goto dlpar_store_out; | |
629 | } | |
630 | ||
631 | hp_elog->_drc_u.drc_count = cpu_to_be32(count); | |
632 | } else { | |
633 | pr_err("Invalid id_type specified: \"%s\"\n", buf); | |
634 | rc = -EINVAL; | |
635 | goto dlpar_store_out; | |
636 | } | |
637 | ||
638 | rc = handle_dlpar_errorlog(hp_elog); | |
639 | ||
640 | dlpar_store_out: | |
641 | kfree(hp_elog); | |
642 | return rc ? rc : count; | |
643 | } | |
644 | ||
645 | static CLASS_ATTR(dlpar, S_IWUSR, NULL, dlpar_store); | |
646 | ||
1a8061c4 NF |
647 | static int __init pseries_dlpar_init(void) |
648 | { | |
999e2dad NF |
649 | int rc; |
650 | ||
651 | #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE | |
1a8061c4 NF |
652 | ppc_md.cpu_probe = dlpar_cpu_probe; |
653 | ppc_md.cpu_release = dlpar_cpu_release; | |
999e2dad | 654 | #endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ |
1a8061c4 | 655 | |
999e2dad NF |
656 | rc = sysfs_create_file(kernel_kobj, &class_attr_dlpar.attr); |
657 | ||
658 | return rc; | |
1a8061c4 NF |
659 | } |
660 | machine_device_initcall(pseries, pseries_dlpar_init); | |
661 |