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Commit | Line | Data |
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d334a491 HY |
1 | /* |
2 | * APEI Generic Hardware Error Source support | |
3 | * | |
4 | * Generic Hardware Error Source provides a way to report platform | |
5 | * hardware errors (such as that from chipset). It works in so called | |
6 | * "Firmware First" mode, that is, hardware errors are reported to | |
7 | * firmware firstly, then reported to Linux by firmware. This way, | |
8 | * some non-standard hardware error registers or non-standard hardware | |
9 | * link can be checked by firmware to produce more hardware error | |
10 | * information for Linux. | |
11 | * | |
12 | * For more information about Generic Hardware Error Source, please | |
13 | * refer to ACPI Specification version 4.0, section 17.3.2.6 | |
14 | * | |
67eb2e99 | 15 | * Copyright 2010,2011 Intel Corp. |
d334a491 HY |
16 | * Author: Huang Ying <ying.huang@intel.com> |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License version | |
20 | * 2 as published by the Free Software Foundation; | |
21 | * | |
22 | * This program is distributed in the hope that it will be useful, | |
23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
25 | * GNU General Public License for more details. | |
26 | * | |
27 | * You should have received a copy of the GNU General Public License | |
28 | * along with this program; if not, write to the Free Software | |
29 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
30 | */ | |
31 | ||
32 | #include <linux/kernel.h> | |
33 | #include <linux/module.h> | |
34 | #include <linux/init.h> | |
35 | #include <linux/acpi.h> | |
36 | #include <linux/io.h> | |
37 | #include <linux/interrupt.h> | |
81e88fdc | 38 | #include <linux/timer.h> |
d334a491 HY |
39 | #include <linux/cper.h> |
40 | #include <linux/kdebug.h> | |
7ad6e943 HY |
41 | #include <linux/platform_device.h> |
42 | #include <linux/mutex.h> | |
32c361f5 | 43 | #include <linux/ratelimit.h> |
81e88fdc | 44 | #include <linux/vmalloc.h> |
67eb2e99 HY |
45 | #include <linux/irq_work.h> |
46 | #include <linux/llist.h> | |
47 | #include <linux/genalloc.h> | |
d334a491 HY |
48 | #include <acpi/apei.h> |
49 | #include <acpi/atomicio.h> | |
50 | #include <acpi/hed.h> | |
51 | #include <asm/mce.h> | |
81e88fdc | 52 | #include <asm/tlbflush.h> |
9c48f1c6 | 53 | #include <asm/nmi.h> |
d334a491 HY |
54 | |
55 | #include "apei-internal.h" | |
56 | ||
57 | #define GHES_PFX "GHES: " | |
58 | ||
59 | #define GHES_ESTATUS_MAX_SIZE 65536 | |
67eb2e99 HY |
60 | #define GHES_ESOURCE_PREALLOC_MAX_SIZE 65536 |
61 | ||
62 | #define GHES_ESTATUS_POOL_MIN_ALLOC_ORDER 3 | |
63 | ||
152cef40 HY |
64 | /* This is just an estimation for memory pool allocation */ |
65 | #define GHES_ESTATUS_CACHE_AVG_SIZE 512 | |
66 | ||
67 | #define GHES_ESTATUS_CACHES_SIZE 4 | |
68 | ||
70cb6e1d | 69 | #define GHES_ESTATUS_IN_CACHE_MAX_NSEC 10000000000ULL |
152cef40 HY |
70 | /* Prevent too many caches are allocated because of RCU */ |
71 | #define GHES_ESTATUS_CACHE_ALLOCED_MAX (GHES_ESTATUS_CACHES_SIZE * 3 / 2) | |
72 | ||
73 | #define GHES_ESTATUS_CACHE_LEN(estatus_len) \ | |
74 | (sizeof(struct ghes_estatus_cache) + (estatus_len)) | |
75 | #define GHES_ESTATUS_FROM_CACHE(estatus_cache) \ | |
76 | ((struct acpi_hest_generic_status *) \ | |
77 | ((struct ghes_estatus_cache *)(estatus_cache) + 1)) | |
78 | ||
67eb2e99 HY |
79 | #define GHES_ESTATUS_NODE_LEN(estatus_len) \ |
80 | (sizeof(struct ghes_estatus_node) + (estatus_len)) | |
81 | #define GHES_ESTATUS_FROM_NODE(estatus_node) \ | |
82 | ((struct acpi_hest_generic_status *) \ | |
83 | ((struct ghes_estatus_node *)(estatus_node) + 1)) | |
d334a491 HY |
84 | |
85 | /* | |
81e88fdc | 86 | * One struct ghes is created for each generic hardware error source. |
d334a491 | 87 | * It provides the context for APEI hardware error timer/IRQ/SCI/NMI |
81e88fdc | 88 | * handler. |
d334a491 HY |
89 | * |
90 | * estatus: memory buffer for error status block, allocated during | |
91 | * HEST parsing. | |
92 | */ | |
93 | #define GHES_TO_CLEAR 0x0001 | |
81e88fdc | 94 | #define GHES_EXITING 0x0002 |
d334a491 HY |
95 | |
96 | struct ghes { | |
97 | struct acpi_hest_generic *generic; | |
98 | struct acpi_hest_generic_status *estatus; | |
d334a491 HY |
99 | u64 buffer_paddr; |
100 | unsigned long flags; | |
81e88fdc HY |
101 | union { |
102 | struct list_head list; | |
103 | struct timer_list timer; | |
104 | unsigned int irq; | |
105 | }; | |
d334a491 HY |
106 | }; |
107 | ||
67eb2e99 HY |
108 | struct ghes_estatus_node { |
109 | struct llist_node llnode; | |
110 | struct acpi_hest_generic *generic; | |
111 | }; | |
112 | ||
152cef40 HY |
113 | struct ghes_estatus_cache { |
114 | u32 estatus_len; | |
115 | atomic_t count; | |
116 | struct acpi_hest_generic *generic; | |
117 | unsigned long long time_in; | |
118 | struct rcu_head rcu; | |
119 | }; | |
120 | ||
90ab5ee9 | 121 | bool ghes_disable; |
b6a95016 HY |
122 | module_param_named(disable, ghes_disable, bool, 0); |
123 | ||
81e88fdc HY |
124 | static int ghes_panic_timeout __read_mostly = 30; |
125 | ||
d334a491 | 126 | /* |
81e88fdc HY |
127 | * All error sources notified with SCI shares one notifier function, |
128 | * so they need to be linked and checked one by one. This is applied | |
129 | * to NMI too. | |
d334a491 | 130 | * |
81e88fdc HY |
131 | * RCU is used for these lists, so ghes_list_mutex is only used for |
132 | * list changing, not for traversing. | |
d334a491 HY |
133 | */ |
134 | static LIST_HEAD(ghes_sci); | |
81e88fdc | 135 | static LIST_HEAD(ghes_nmi); |
7ad6e943 | 136 | static DEFINE_MUTEX(ghes_list_mutex); |
d334a491 | 137 | |
81e88fdc HY |
138 | /* |
139 | * NMI may be triggered on any CPU, so ghes_nmi_lock is used for | |
140 | * mutual exclusion. | |
141 | */ | |
142 | static DEFINE_RAW_SPINLOCK(ghes_nmi_lock); | |
143 | ||
144 | /* | |
145 | * Because the memory area used to transfer hardware error information | |
146 | * from BIOS to Linux can be determined only in NMI, IRQ or timer | |
147 | * handler, but general ioremap can not be used in atomic context, so | |
148 | * a special version of atomic ioremap is implemented for that. | |
149 | */ | |
150 | ||
151 | /* | |
152 | * Two virtual pages are used, one for NMI context, the other for | |
153 | * IRQ/PROCESS context | |
154 | */ | |
155 | #define GHES_IOREMAP_PAGES 2 | |
156 | #define GHES_IOREMAP_NMI_PAGE(base) (base) | |
157 | #define GHES_IOREMAP_IRQ_PAGE(base) ((base) + PAGE_SIZE) | |
158 | ||
159 | /* virtual memory area for atomic ioremap */ | |
160 | static struct vm_struct *ghes_ioremap_area; | |
161 | /* | |
162 | * These 2 spinlock is used to prevent atomic ioremap virtual memory | |
163 | * area from being mapped simultaneously. | |
164 | */ | |
165 | static DEFINE_RAW_SPINLOCK(ghes_ioremap_lock_nmi); | |
166 | static DEFINE_SPINLOCK(ghes_ioremap_lock_irq); | |
167 | ||
67eb2e99 HY |
168 | /* |
169 | * printk is not safe in NMI context. So in NMI handler, we allocate | |
170 | * required memory from lock-less memory allocator | |
171 | * (ghes_estatus_pool), save estatus into it, put them into lock-less | |
172 | * list (ghes_estatus_llist), then delay printk into IRQ context via | |
173 | * irq_work (ghes_proc_irq_work). ghes_estatus_size_request record | |
174 | * required pool size by all NMI error source. | |
175 | */ | |
176 | static struct gen_pool *ghes_estatus_pool; | |
177 | static unsigned long ghes_estatus_pool_size_request; | |
178 | static struct llist_head ghes_estatus_llist; | |
179 | static struct irq_work ghes_proc_irq_work; | |
180 | ||
152cef40 HY |
181 | struct ghes_estatus_cache *ghes_estatus_caches[GHES_ESTATUS_CACHES_SIZE]; |
182 | static atomic_t ghes_estatus_cache_alloced; | |
183 | ||
81e88fdc HY |
184 | static int ghes_ioremap_init(void) |
185 | { | |
186 | ghes_ioremap_area = __get_vm_area(PAGE_SIZE * GHES_IOREMAP_PAGES, | |
187 | VM_IOREMAP, VMALLOC_START, VMALLOC_END); | |
188 | if (!ghes_ioremap_area) { | |
189 | pr_err(GHES_PFX "Failed to allocate virtual memory area for atomic ioremap.\n"); | |
190 | return -ENOMEM; | |
191 | } | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | static void ghes_ioremap_exit(void) | |
197 | { | |
198 | free_vm_area(ghes_ioremap_area); | |
199 | } | |
200 | ||
201 | static void __iomem *ghes_ioremap_pfn_nmi(u64 pfn) | |
202 | { | |
203 | unsigned long vaddr; | |
204 | ||
205 | vaddr = (unsigned long)GHES_IOREMAP_NMI_PAGE(ghes_ioremap_area->addr); | |
206 | ioremap_page_range(vaddr, vaddr + PAGE_SIZE, | |
207 | pfn << PAGE_SHIFT, PAGE_KERNEL); | |
208 | ||
209 | return (void __iomem *)vaddr; | |
210 | } | |
211 | ||
212 | static void __iomem *ghes_ioremap_pfn_irq(u64 pfn) | |
213 | { | |
214 | unsigned long vaddr; | |
215 | ||
216 | vaddr = (unsigned long)GHES_IOREMAP_IRQ_PAGE(ghes_ioremap_area->addr); | |
217 | ioremap_page_range(vaddr, vaddr + PAGE_SIZE, | |
218 | pfn << PAGE_SHIFT, PAGE_KERNEL); | |
219 | ||
220 | return (void __iomem *)vaddr; | |
221 | } | |
222 | ||
223 | static void ghes_iounmap_nmi(void __iomem *vaddr_ptr) | |
224 | { | |
225 | unsigned long vaddr = (unsigned long __force)vaddr_ptr; | |
226 | void *base = ghes_ioremap_area->addr; | |
227 | ||
228 | BUG_ON(vaddr != (unsigned long)GHES_IOREMAP_NMI_PAGE(base)); | |
229 | unmap_kernel_range_noflush(vaddr, PAGE_SIZE); | |
230 | __flush_tlb_one(vaddr); | |
231 | } | |
232 | ||
233 | static void ghes_iounmap_irq(void __iomem *vaddr_ptr) | |
234 | { | |
235 | unsigned long vaddr = (unsigned long __force)vaddr_ptr; | |
236 | void *base = ghes_ioremap_area->addr; | |
237 | ||
238 | BUG_ON(vaddr != (unsigned long)GHES_IOREMAP_IRQ_PAGE(base)); | |
239 | unmap_kernel_range_noflush(vaddr, PAGE_SIZE); | |
240 | __flush_tlb_one(vaddr); | |
241 | } | |
242 | ||
67eb2e99 HY |
243 | static int ghes_estatus_pool_init(void) |
244 | { | |
245 | ghes_estatus_pool = gen_pool_create(GHES_ESTATUS_POOL_MIN_ALLOC_ORDER, -1); | |
246 | if (!ghes_estatus_pool) | |
247 | return -ENOMEM; | |
248 | return 0; | |
249 | } | |
250 | ||
251 | static void ghes_estatus_pool_free_chunk_page(struct gen_pool *pool, | |
252 | struct gen_pool_chunk *chunk, | |
253 | void *data) | |
254 | { | |
255 | free_page(chunk->start_addr); | |
256 | } | |
257 | ||
258 | static void ghes_estatus_pool_exit(void) | |
259 | { | |
260 | gen_pool_for_each_chunk(ghes_estatus_pool, | |
261 | ghes_estatus_pool_free_chunk_page, NULL); | |
262 | gen_pool_destroy(ghes_estatus_pool); | |
263 | } | |
264 | ||
265 | static int ghes_estatus_pool_expand(unsigned long len) | |
266 | { | |
267 | unsigned long i, pages, size, addr; | |
268 | int ret; | |
269 | ||
270 | ghes_estatus_pool_size_request += PAGE_ALIGN(len); | |
271 | size = gen_pool_size(ghes_estatus_pool); | |
272 | if (size >= ghes_estatus_pool_size_request) | |
273 | return 0; | |
274 | pages = (ghes_estatus_pool_size_request - size) / PAGE_SIZE; | |
275 | for (i = 0; i < pages; i++) { | |
276 | addr = __get_free_page(GFP_KERNEL); | |
277 | if (!addr) | |
278 | return -ENOMEM; | |
279 | ret = gen_pool_add(ghes_estatus_pool, addr, PAGE_SIZE, -1); | |
280 | if (ret) | |
281 | return ret; | |
282 | } | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | static void ghes_estatus_pool_shrink(unsigned long len) | |
288 | { | |
289 | ghes_estatus_pool_size_request -= PAGE_ALIGN(len); | |
290 | } | |
291 | ||
d334a491 HY |
292 | static struct ghes *ghes_new(struct acpi_hest_generic *generic) |
293 | { | |
294 | struct ghes *ghes; | |
295 | unsigned int error_block_length; | |
296 | int rc; | |
297 | ||
298 | ghes = kzalloc(sizeof(*ghes), GFP_KERNEL); | |
299 | if (!ghes) | |
300 | return ERR_PTR(-ENOMEM); | |
301 | ghes->generic = generic; | |
d334a491 HY |
302 | rc = acpi_pre_map_gar(&generic->error_status_address); |
303 | if (rc) | |
304 | goto err_free; | |
305 | error_block_length = generic->error_block_length; | |
306 | if (error_block_length > GHES_ESTATUS_MAX_SIZE) { | |
307 | pr_warning(FW_WARN GHES_PFX | |
308 | "Error status block length is too long: %u for " | |
309 | "generic hardware error source: %d.\n", | |
310 | error_block_length, generic->header.source_id); | |
311 | error_block_length = GHES_ESTATUS_MAX_SIZE; | |
312 | } | |
313 | ghes->estatus = kmalloc(error_block_length, GFP_KERNEL); | |
314 | if (!ghes->estatus) { | |
315 | rc = -ENOMEM; | |
316 | goto err_unmap; | |
317 | } | |
318 | ||
319 | return ghes; | |
320 | ||
321 | err_unmap: | |
322 | acpi_post_unmap_gar(&generic->error_status_address); | |
323 | err_free: | |
324 | kfree(ghes); | |
325 | return ERR_PTR(rc); | |
326 | } | |
327 | ||
328 | static void ghes_fini(struct ghes *ghes) | |
329 | { | |
330 | kfree(ghes->estatus); | |
331 | acpi_post_unmap_gar(&ghes->generic->error_status_address); | |
332 | } | |
333 | ||
334 | enum { | |
ad4ecef2 HY |
335 | GHES_SEV_NO = 0x0, |
336 | GHES_SEV_CORRECTED = 0x1, | |
337 | GHES_SEV_RECOVERABLE = 0x2, | |
338 | GHES_SEV_PANIC = 0x3, | |
d334a491 HY |
339 | }; |
340 | ||
341 | static inline int ghes_severity(int severity) | |
342 | { | |
343 | switch (severity) { | |
ad4ecef2 HY |
344 | case CPER_SEV_INFORMATIONAL: |
345 | return GHES_SEV_NO; | |
346 | case CPER_SEV_CORRECTED: | |
347 | return GHES_SEV_CORRECTED; | |
348 | case CPER_SEV_RECOVERABLE: | |
349 | return GHES_SEV_RECOVERABLE; | |
350 | case CPER_SEV_FATAL: | |
351 | return GHES_SEV_PANIC; | |
d334a491 | 352 | default: |
25985edc | 353 | /* Unknown, go panic */ |
ad4ecef2 | 354 | return GHES_SEV_PANIC; |
d334a491 HY |
355 | } |
356 | } | |
357 | ||
81e88fdc HY |
358 | static void ghes_copy_tofrom_phys(void *buffer, u64 paddr, u32 len, |
359 | int from_phys) | |
d334a491 | 360 | { |
81e88fdc HY |
361 | void __iomem *vaddr; |
362 | unsigned long flags = 0; | |
363 | int in_nmi = in_nmi(); | |
364 | u64 offset; | |
365 | u32 trunk; | |
366 | ||
367 | while (len > 0) { | |
368 | offset = paddr - (paddr & PAGE_MASK); | |
369 | if (in_nmi) { | |
370 | raw_spin_lock(&ghes_ioremap_lock_nmi); | |
371 | vaddr = ghes_ioremap_pfn_nmi(paddr >> PAGE_SHIFT); | |
372 | } else { | |
373 | spin_lock_irqsave(&ghes_ioremap_lock_irq, flags); | |
374 | vaddr = ghes_ioremap_pfn_irq(paddr >> PAGE_SHIFT); | |
375 | } | |
376 | trunk = PAGE_SIZE - offset; | |
377 | trunk = min(trunk, len); | |
378 | if (from_phys) | |
379 | memcpy_fromio(buffer, vaddr + offset, trunk); | |
380 | else | |
381 | memcpy_toio(vaddr + offset, buffer, trunk); | |
382 | len -= trunk; | |
383 | paddr += trunk; | |
384 | buffer += trunk; | |
385 | if (in_nmi) { | |
386 | ghes_iounmap_nmi(vaddr); | |
387 | raw_spin_unlock(&ghes_ioremap_lock_nmi); | |
388 | } else { | |
389 | ghes_iounmap_irq(vaddr); | |
390 | spin_unlock_irqrestore(&ghes_ioremap_lock_irq, flags); | |
391 | } | |
392 | } | |
d334a491 HY |
393 | } |
394 | ||
395 | static int ghes_read_estatus(struct ghes *ghes, int silent) | |
396 | { | |
397 | struct acpi_hest_generic *g = ghes->generic; | |
398 | u64 buf_paddr; | |
399 | u32 len; | |
400 | int rc; | |
401 | ||
402 | rc = acpi_atomic_read(&buf_paddr, &g->error_status_address); | |
403 | if (rc) { | |
404 | if (!silent && printk_ratelimit()) | |
405 | pr_warning(FW_WARN GHES_PFX | |
406 | "Failed to read error status block address for hardware error source: %d.\n", | |
407 | g->header.source_id); | |
408 | return -EIO; | |
409 | } | |
410 | if (!buf_paddr) | |
411 | return -ENOENT; | |
412 | ||
81e88fdc HY |
413 | ghes_copy_tofrom_phys(ghes->estatus, buf_paddr, |
414 | sizeof(*ghes->estatus), 1); | |
d334a491 HY |
415 | if (!ghes->estatus->block_status) |
416 | return -ENOENT; | |
417 | ||
418 | ghes->buffer_paddr = buf_paddr; | |
419 | ghes->flags |= GHES_TO_CLEAR; | |
420 | ||
421 | rc = -EIO; | |
422 | len = apei_estatus_len(ghes->estatus); | |
423 | if (len < sizeof(*ghes->estatus)) | |
424 | goto err_read_block; | |
425 | if (len > ghes->generic->error_block_length) | |
426 | goto err_read_block; | |
427 | if (apei_estatus_check_header(ghes->estatus)) | |
428 | goto err_read_block; | |
81e88fdc HY |
429 | ghes_copy_tofrom_phys(ghes->estatus + 1, |
430 | buf_paddr + sizeof(*ghes->estatus), | |
431 | len - sizeof(*ghes->estatus), 1); | |
d334a491 HY |
432 | if (apei_estatus_check(ghes->estatus)) |
433 | goto err_read_block; | |
434 | rc = 0; | |
435 | ||
436 | err_read_block: | |
81e88fdc | 437 | if (rc && !silent && printk_ratelimit()) |
d334a491 HY |
438 | pr_warning(FW_WARN GHES_PFX |
439 | "Failed to read error status block!\n"); | |
440 | return rc; | |
441 | } | |
442 | ||
443 | static void ghes_clear_estatus(struct ghes *ghes) | |
444 | { | |
445 | ghes->estatus->block_status = 0; | |
446 | if (!(ghes->flags & GHES_TO_CLEAR)) | |
447 | return; | |
448 | ghes_copy_tofrom_phys(ghes->estatus, ghes->buffer_paddr, | |
449 | sizeof(ghes->estatus->block_status), 0); | |
450 | ghes->flags &= ~GHES_TO_CLEAR; | |
451 | } | |
452 | ||
67eb2e99 | 453 | static void ghes_do_proc(const struct acpi_hest_generic_status *estatus) |
d334a491 | 454 | { |
ba61ca4a | 455 | int sev, sec_sev; |
d334a491 HY |
456 | struct acpi_hest_generic_data *gdata; |
457 | ||
67eb2e99 HY |
458 | sev = ghes_severity(estatus->error_severity); |
459 | apei_estatus_for_each_section(estatus, gdata) { | |
ba61ca4a | 460 | sec_sev = ghes_severity(gdata->error_severity); |
d334a491 HY |
461 | if (!uuid_le_cmp(*(uuid_le *)gdata->section_type, |
462 | CPER_SEC_PLATFORM_MEM)) { | |
ba61ca4a HY |
463 | struct cper_sec_mem_err *mem_err; |
464 | mem_err = (struct cper_sec_mem_err *)(gdata+1); | |
465 | #ifdef CONFIG_X86_MCE | |
466 | apei_mce_report_mem_error(sev == GHES_SEV_CORRECTED, | |
467 | mem_err); | |
d334a491 | 468 | #endif |
ba61ca4a HY |
469 | #ifdef CONFIG_ACPI_APEI_MEMORY_FAILURE |
470 | if (sev == GHES_SEV_RECOVERABLE && | |
471 | sec_sev == GHES_SEV_RECOVERABLE && | |
472 | mem_err->validation_bits & CPER_MEM_VALID_PHYSICAL_ADDRESS) { | |
473 | unsigned long pfn; | |
474 | pfn = mem_err->physical_addr >> PAGE_SHIFT; | |
475 | memory_failure_queue(pfn, 0, 0); | |
476 | } | |
477 | #endif | |
478 | } | |
d334a491 | 479 | } |
32c361f5 | 480 | } |
d334a491 | 481 | |
67eb2e99 HY |
482 | static void __ghes_print_estatus(const char *pfx, |
483 | const struct acpi_hest_generic *generic, | |
484 | const struct acpi_hest_generic_status *estatus) | |
32c361f5 | 485 | { |
32c361f5 | 486 | if (pfx == NULL) { |
67eb2e99 | 487 | if (ghes_severity(estatus->error_severity) <= |
32c361f5 HY |
488 | GHES_SEV_CORRECTED) |
489 | pfx = KERN_WARNING HW_ERR; | |
490 | else | |
491 | pfx = KERN_ERR HW_ERR; | |
492 | } | |
5588340d | 493 | printk("%s""Hardware error from APEI Generic Hardware Error Source: %d\n", |
67eb2e99 HY |
494 | pfx, generic->header.source_id); |
495 | apei_estatus_print(pfx, estatus); | |
5588340d HY |
496 | } |
497 | ||
152cef40 HY |
498 | static int ghes_print_estatus(const char *pfx, |
499 | const struct acpi_hest_generic *generic, | |
500 | const struct acpi_hest_generic_status *estatus) | |
5588340d HY |
501 | { |
502 | /* Not more than 2 messages every 5 seconds */ | |
67eb2e99 HY |
503 | static DEFINE_RATELIMIT_STATE(ratelimit_corrected, 5*HZ, 2); |
504 | static DEFINE_RATELIMIT_STATE(ratelimit_uncorrected, 5*HZ, 2); | |
505 | struct ratelimit_state *ratelimit; | |
5588340d | 506 | |
67eb2e99 HY |
507 | if (ghes_severity(estatus->error_severity) <= GHES_SEV_CORRECTED) |
508 | ratelimit = &ratelimit_corrected; | |
509 | else | |
510 | ratelimit = &ratelimit_uncorrected; | |
152cef40 | 511 | if (__ratelimit(ratelimit)) { |
67eb2e99 | 512 | __ghes_print_estatus(pfx, generic, estatus); |
152cef40 HY |
513 | return 1; |
514 | } | |
515 | return 0; | |
516 | } | |
517 | ||
518 | /* | |
519 | * GHES error status reporting throttle, to report more kinds of | |
520 | * errors, instead of just most frequently occurred errors. | |
521 | */ | |
522 | static int ghes_estatus_cached(struct acpi_hest_generic_status *estatus) | |
523 | { | |
524 | u32 len; | |
525 | int i, cached = 0; | |
526 | unsigned long long now; | |
527 | struct ghes_estatus_cache *cache; | |
528 | struct acpi_hest_generic_status *cache_estatus; | |
529 | ||
530 | len = apei_estatus_len(estatus); | |
531 | rcu_read_lock(); | |
532 | for (i = 0; i < GHES_ESTATUS_CACHES_SIZE; i++) { | |
533 | cache = rcu_dereference(ghes_estatus_caches[i]); | |
534 | if (cache == NULL) | |
535 | continue; | |
536 | if (len != cache->estatus_len) | |
537 | continue; | |
538 | cache_estatus = GHES_ESTATUS_FROM_CACHE(cache); | |
539 | if (memcmp(estatus, cache_estatus, len)) | |
540 | continue; | |
541 | atomic_inc(&cache->count); | |
542 | now = sched_clock(); | |
543 | if (now - cache->time_in < GHES_ESTATUS_IN_CACHE_MAX_NSEC) | |
544 | cached = 1; | |
545 | break; | |
546 | } | |
547 | rcu_read_unlock(); | |
548 | return cached; | |
549 | } | |
550 | ||
551 | static struct ghes_estatus_cache *ghes_estatus_cache_alloc( | |
552 | struct acpi_hest_generic *generic, | |
553 | struct acpi_hest_generic_status *estatus) | |
554 | { | |
555 | int alloced; | |
556 | u32 len, cache_len; | |
557 | struct ghes_estatus_cache *cache; | |
558 | struct acpi_hest_generic_status *cache_estatus; | |
559 | ||
560 | alloced = atomic_add_return(1, &ghes_estatus_cache_alloced); | |
561 | if (alloced > GHES_ESTATUS_CACHE_ALLOCED_MAX) { | |
562 | atomic_dec(&ghes_estatus_cache_alloced); | |
563 | return NULL; | |
564 | } | |
565 | len = apei_estatus_len(estatus); | |
566 | cache_len = GHES_ESTATUS_CACHE_LEN(len); | |
567 | cache = (void *)gen_pool_alloc(ghes_estatus_pool, cache_len); | |
568 | if (!cache) { | |
569 | atomic_dec(&ghes_estatus_cache_alloced); | |
570 | return NULL; | |
571 | } | |
572 | cache_estatus = GHES_ESTATUS_FROM_CACHE(cache); | |
573 | memcpy(cache_estatus, estatus, len); | |
574 | cache->estatus_len = len; | |
575 | atomic_set(&cache->count, 0); | |
576 | cache->generic = generic; | |
577 | cache->time_in = sched_clock(); | |
578 | return cache; | |
579 | } | |
580 | ||
581 | static void ghes_estatus_cache_free(struct ghes_estatus_cache *cache) | |
582 | { | |
583 | u32 len; | |
584 | ||
585 | len = apei_estatus_len(GHES_ESTATUS_FROM_CACHE(cache)); | |
586 | len = GHES_ESTATUS_CACHE_LEN(len); | |
587 | gen_pool_free(ghes_estatus_pool, (unsigned long)cache, len); | |
588 | atomic_dec(&ghes_estatus_cache_alloced); | |
589 | } | |
590 | ||
591 | static void ghes_estatus_cache_rcu_free(struct rcu_head *head) | |
592 | { | |
593 | struct ghes_estatus_cache *cache; | |
594 | ||
595 | cache = container_of(head, struct ghes_estatus_cache, rcu); | |
596 | ghes_estatus_cache_free(cache); | |
597 | } | |
598 | ||
599 | static void ghes_estatus_cache_add( | |
600 | struct acpi_hest_generic *generic, | |
601 | struct acpi_hest_generic_status *estatus) | |
602 | { | |
603 | int i, slot = -1, count; | |
604 | unsigned long long now, duration, period, max_period = 0; | |
605 | struct ghes_estatus_cache *cache, *slot_cache = NULL, *new_cache; | |
606 | ||
607 | new_cache = ghes_estatus_cache_alloc(generic, estatus); | |
608 | if (new_cache == NULL) | |
609 | return; | |
610 | rcu_read_lock(); | |
611 | now = sched_clock(); | |
612 | for (i = 0; i < GHES_ESTATUS_CACHES_SIZE; i++) { | |
613 | cache = rcu_dereference(ghes_estatus_caches[i]); | |
614 | if (cache == NULL) { | |
615 | slot = i; | |
616 | slot_cache = NULL; | |
617 | break; | |
618 | } | |
619 | duration = now - cache->time_in; | |
620 | if (duration >= GHES_ESTATUS_IN_CACHE_MAX_NSEC) { | |
621 | slot = i; | |
622 | slot_cache = cache; | |
623 | break; | |
624 | } | |
625 | count = atomic_read(&cache->count); | |
70cb6e1d LB |
626 | period = duration; |
627 | do_div(period, (count + 1)); | |
152cef40 HY |
628 | if (period > max_period) { |
629 | max_period = period; | |
630 | slot = i; | |
631 | slot_cache = cache; | |
632 | } | |
633 | } | |
634 | /* new_cache must be put into array after its contents are written */ | |
635 | smp_wmb(); | |
636 | if (slot != -1 && cmpxchg(ghes_estatus_caches + slot, | |
637 | slot_cache, new_cache) == slot_cache) { | |
638 | if (slot_cache) | |
639 | call_rcu(&slot_cache->rcu, ghes_estatus_cache_rcu_free); | |
640 | } else | |
641 | ghes_estatus_cache_free(new_cache); | |
642 | rcu_read_unlock(); | |
d334a491 HY |
643 | } |
644 | ||
645 | static int ghes_proc(struct ghes *ghes) | |
646 | { | |
647 | int rc; | |
648 | ||
649 | rc = ghes_read_estatus(ghes, 0); | |
650 | if (rc) | |
651 | goto out; | |
152cef40 HY |
652 | if (!ghes_estatus_cached(ghes->estatus)) { |
653 | if (ghes_print_estatus(NULL, ghes->generic, ghes->estatus)) | |
654 | ghes_estatus_cache_add(ghes->generic, ghes->estatus); | |
655 | } | |
67eb2e99 | 656 | ghes_do_proc(ghes->estatus); |
d334a491 HY |
657 | out: |
658 | ghes_clear_estatus(ghes); | |
659 | return 0; | |
660 | } | |
661 | ||
81e88fdc HY |
662 | static void ghes_add_timer(struct ghes *ghes) |
663 | { | |
664 | struct acpi_hest_generic *g = ghes->generic; | |
665 | unsigned long expire; | |
666 | ||
667 | if (!g->notify.poll_interval) { | |
668 | pr_warning(FW_WARN GHES_PFX "Poll interval is 0 for generic hardware error source: %d, disabled.\n", | |
669 | g->header.source_id); | |
670 | return; | |
671 | } | |
672 | expire = jiffies + msecs_to_jiffies(g->notify.poll_interval); | |
673 | ghes->timer.expires = round_jiffies_relative(expire); | |
674 | add_timer(&ghes->timer); | |
675 | } | |
676 | ||
677 | static void ghes_poll_func(unsigned long data) | |
678 | { | |
679 | struct ghes *ghes = (void *)data; | |
680 | ||
681 | ghes_proc(ghes); | |
682 | if (!(ghes->flags & GHES_EXITING)) | |
683 | ghes_add_timer(ghes); | |
684 | } | |
685 | ||
686 | static irqreturn_t ghes_irq_func(int irq, void *data) | |
687 | { | |
688 | struct ghes *ghes = data; | |
689 | int rc; | |
690 | ||
691 | rc = ghes_proc(ghes); | |
692 | if (rc) | |
693 | return IRQ_NONE; | |
694 | ||
695 | return IRQ_HANDLED; | |
696 | } | |
697 | ||
d334a491 HY |
698 | static int ghes_notify_sci(struct notifier_block *this, |
699 | unsigned long event, void *data) | |
700 | { | |
701 | struct ghes *ghes; | |
702 | int ret = NOTIFY_DONE; | |
703 | ||
704 | rcu_read_lock(); | |
705 | list_for_each_entry_rcu(ghes, &ghes_sci, list) { | |
706 | if (!ghes_proc(ghes)) | |
707 | ret = NOTIFY_OK; | |
708 | } | |
709 | rcu_read_unlock(); | |
710 | ||
711 | return ret; | |
712 | } | |
713 | ||
67eb2e99 HY |
714 | static void ghes_proc_in_irq(struct irq_work *irq_work) |
715 | { | |
716 | struct llist_node *llnode, *next, *tail = NULL; | |
717 | struct ghes_estatus_node *estatus_node; | |
152cef40 | 718 | struct acpi_hest_generic *generic; |
67eb2e99 HY |
719 | struct acpi_hest_generic_status *estatus; |
720 | u32 len, node_len; | |
721 | ||
722 | /* | |
723 | * Because the time order of estatus in list is reversed, | |
724 | * revert it back to proper order. | |
725 | */ | |
726 | llnode = llist_del_all(&ghes_estatus_llist); | |
727 | while (llnode) { | |
728 | next = llnode->next; | |
729 | llnode->next = tail; | |
730 | tail = llnode; | |
731 | llnode = next; | |
732 | } | |
733 | llnode = tail; | |
734 | while (llnode) { | |
735 | next = llnode->next; | |
736 | estatus_node = llist_entry(llnode, struct ghes_estatus_node, | |
737 | llnode); | |
738 | estatus = GHES_ESTATUS_FROM_NODE(estatus_node); | |
739 | len = apei_estatus_len(estatus); | |
740 | node_len = GHES_ESTATUS_NODE_LEN(len); | |
741 | ghes_do_proc(estatus); | |
152cef40 HY |
742 | if (!ghes_estatus_cached(estatus)) { |
743 | generic = estatus_node->generic; | |
744 | if (ghes_print_estatus(NULL, generic, estatus)) | |
745 | ghes_estatus_cache_add(generic, estatus); | |
746 | } | |
67eb2e99 HY |
747 | gen_pool_free(ghes_estatus_pool, (unsigned long)estatus_node, |
748 | node_len); | |
749 | llnode = next; | |
750 | } | |
751 | } | |
752 | ||
9c48f1c6 | 753 | static int ghes_notify_nmi(unsigned int cmd, struct pt_regs *regs) |
81e88fdc HY |
754 | { |
755 | struct ghes *ghes, *ghes_global = NULL; | |
756 | int sev, sev_global = -1; | |
9c48f1c6 | 757 | int ret = NMI_DONE; |
81e88fdc HY |
758 | |
759 | raw_spin_lock(&ghes_nmi_lock); | |
760 | list_for_each_entry_rcu(ghes, &ghes_nmi, list) { | |
761 | if (ghes_read_estatus(ghes, 1)) { | |
762 | ghes_clear_estatus(ghes); | |
763 | continue; | |
764 | } | |
765 | sev = ghes_severity(ghes->estatus->error_severity); | |
766 | if (sev > sev_global) { | |
767 | sev_global = sev; | |
768 | ghes_global = ghes; | |
769 | } | |
9c48f1c6 | 770 | ret = NMI_HANDLED; |
81e88fdc HY |
771 | } |
772 | ||
9c48f1c6 | 773 | if (ret == NMI_DONE) |
81e88fdc HY |
774 | goto out; |
775 | ||
776 | if (sev_global >= GHES_SEV_PANIC) { | |
777 | oops_begin(); | |
67eb2e99 HY |
778 | __ghes_print_estatus(KERN_EMERG HW_ERR, ghes_global->generic, |
779 | ghes_global->estatus); | |
81e88fdc HY |
780 | /* reboot to log the error! */ |
781 | if (panic_timeout == 0) | |
782 | panic_timeout = ghes_panic_timeout; | |
783 | panic("Fatal hardware error!"); | |
784 | } | |
785 | ||
786 | list_for_each_entry_rcu(ghes, &ghes_nmi, list) { | |
67eb2e99 HY |
787 | #ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG |
788 | u32 len, node_len; | |
789 | struct ghes_estatus_node *estatus_node; | |
790 | struct acpi_hest_generic_status *estatus; | |
791 | #endif | |
81e88fdc HY |
792 | if (!(ghes->flags & GHES_TO_CLEAR)) |
793 | continue; | |
67eb2e99 | 794 | #ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG |
152cef40 HY |
795 | if (ghes_estatus_cached(ghes->estatus)) |
796 | goto next; | |
67eb2e99 HY |
797 | /* Save estatus for further processing in IRQ context */ |
798 | len = apei_estatus_len(ghes->estatus); | |
799 | node_len = GHES_ESTATUS_NODE_LEN(len); | |
800 | estatus_node = (void *)gen_pool_alloc(ghes_estatus_pool, | |
801 | node_len); | |
802 | if (estatus_node) { | |
803 | estatus_node->generic = ghes->generic; | |
804 | estatus = GHES_ESTATUS_FROM_NODE(estatus_node); | |
805 | memcpy(estatus, ghes->estatus, len); | |
806 | llist_add(&estatus_node->llnode, &ghes_estatus_llist); | |
807 | } | |
152cef40 | 808 | next: |
67eb2e99 | 809 | #endif |
81e88fdc HY |
810 | ghes_clear_estatus(ghes); |
811 | } | |
67eb2e99 HY |
812 | #ifdef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG |
813 | irq_work_queue(&ghes_proc_irq_work); | |
814 | #endif | |
81e88fdc HY |
815 | |
816 | out: | |
817 | raw_spin_unlock(&ghes_nmi_lock); | |
818 | return ret; | |
819 | } | |
820 | ||
d334a491 HY |
821 | static struct notifier_block ghes_notifier_sci = { |
822 | .notifier_call = ghes_notify_sci, | |
823 | }; | |
824 | ||
67eb2e99 HY |
825 | static unsigned long ghes_esource_prealloc_size( |
826 | const struct acpi_hest_generic *generic) | |
827 | { | |
828 | unsigned long block_length, prealloc_records, prealloc_size; | |
829 | ||
830 | block_length = min_t(unsigned long, generic->error_block_length, | |
831 | GHES_ESTATUS_MAX_SIZE); | |
832 | prealloc_records = max_t(unsigned long, | |
833 | generic->records_to_preallocate, 1); | |
834 | prealloc_size = min_t(unsigned long, block_length * prealloc_records, | |
835 | GHES_ESOURCE_PREALLOC_MAX_SIZE); | |
836 | ||
837 | return prealloc_size; | |
838 | } | |
839 | ||
7ad6e943 | 840 | static int __devinit ghes_probe(struct platform_device *ghes_dev) |
d334a491 HY |
841 | { |
842 | struct acpi_hest_generic *generic; | |
843 | struct ghes *ghes = NULL; | |
67eb2e99 | 844 | unsigned long len; |
7ad6e943 | 845 | int rc = -EINVAL; |
d334a491 | 846 | |
1dd6b20e | 847 | generic = *(struct acpi_hest_generic **)ghes_dev->dev.platform_data; |
d334a491 | 848 | if (!generic->enabled) |
7ad6e943 | 849 | return -ENODEV; |
d334a491 | 850 | |
81e88fdc HY |
851 | switch (generic->notify.type) { |
852 | case ACPI_HEST_NOTIFY_POLLED: | |
853 | case ACPI_HEST_NOTIFY_EXTERNAL: | |
854 | case ACPI_HEST_NOTIFY_SCI: | |
855 | case ACPI_HEST_NOTIFY_NMI: | |
856 | break; | |
857 | case ACPI_HEST_NOTIFY_LOCAL: | |
858 | pr_warning(GHES_PFX "Generic hardware error source: %d notified via local interrupt is not supported!\n", | |
d334a491 HY |
859 | generic->header.source_id); |
860 | goto err; | |
81e88fdc HY |
861 | default: |
862 | pr_warning(FW_WARN GHES_PFX "Unknown notification type: %u for generic hardware error source: %d\n", | |
863 | generic->notify.type, generic->header.source_id); | |
864 | goto err; | |
d334a491 | 865 | } |
81e88fdc HY |
866 | |
867 | rc = -EIO; | |
868 | if (generic->error_block_length < | |
869 | sizeof(struct acpi_hest_generic_status)) { | |
870 | pr_warning(FW_BUG GHES_PFX "Invalid error block length: %u for generic hardware error source: %d\n", | |
871 | generic->error_block_length, | |
d334a491 HY |
872 | generic->header.source_id); |
873 | goto err; | |
874 | } | |
875 | ghes = ghes_new(generic); | |
876 | if (IS_ERR(ghes)) { | |
877 | rc = PTR_ERR(ghes); | |
878 | ghes = NULL; | |
879 | goto err; | |
880 | } | |
81e88fdc HY |
881 | switch (generic->notify.type) { |
882 | case ACPI_HEST_NOTIFY_POLLED: | |
883 | ghes->timer.function = ghes_poll_func; | |
884 | ghes->timer.data = (unsigned long)ghes; | |
885 | init_timer_deferrable(&ghes->timer); | |
886 | ghes_add_timer(ghes); | |
887 | break; | |
888 | case ACPI_HEST_NOTIFY_EXTERNAL: | |
889 | /* External interrupt vector is GSI */ | |
890 | if (acpi_gsi_to_irq(generic->notify.vector, &ghes->irq)) { | |
891 | pr_err(GHES_PFX "Failed to map GSI to IRQ for generic hardware error source: %d\n", | |
892 | generic->header.source_id); | |
893 | goto err; | |
894 | } | |
895 | if (request_irq(ghes->irq, ghes_irq_func, | |
896 | 0, "GHES IRQ", ghes)) { | |
897 | pr_err(GHES_PFX "Failed to register IRQ for generic hardware error source: %d\n", | |
898 | generic->header.source_id); | |
899 | goto err; | |
900 | } | |
901 | break; | |
902 | case ACPI_HEST_NOTIFY_SCI: | |
7ad6e943 | 903 | mutex_lock(&ghes_list_mutex); |
d334a491 HY |
904 | if (list_empty(&ghes_sci)) |
905 | register_acpi_hed_notifier(&ghes_notifier_sci); | |
906 | list_add_rcu(&ghes->list, &ghes_sci); | |
7ad6e943 | 907 | mutex_unlock(&ghes_list_mutex); |
81e88fdc HY |
908 | break; |
909 | case ACPI_HEST_NOTIFY_NMI: | |
67eb2e99 HY |
910 | len = ghes_esource_prealloc_size(generic); |
911 | ghes_estatus_pool_expand(len); | |
81e88fdc HY |
912 | mutex_lock(&ghes_list_mutex); |
913 | if (list_empty(&ghes_nmi)) | |
9c48f1c6 DZ |
914 | register_nmi_handler(NMI_LOCAL, ghes_notify_nmi, 0, |
915 | "ghes"); | |
81e88fdc HY |
916 | list_add_rcu(&ghes->list, &ghes_nmi); |
917 | mutex_unlock(&ghes_list_mutex); | |
918 | break; | |
919 | default: | |
920 | BUG(); | |
d334a491 | 921 | } |
7ad6e943 | 922 | platform_set_drvdata(ghes_dev, ghes); |
d334a491 HY |
923 | |
924 | return 0; | |
925 | err: | |
7ad6e943 | 926 | if (ghes) { |
d334a491 | 927 | ghes_fini(ghes); |
7ad6e943 HY |
928 | kfree(ghes); |
929 | } | |
d334a491 HY |
930 | return rc; |
931 | } | |
932 | ||
7ad6e943 | 933 | static int __devexit ghes_remove(struct platform_device *ghes_dev) |
d334a491 | 934 | { |
7ad6e943 HY |
935 | struct ghes *ghes; |
936 | struct acpi_hest_generic *generic; | |
67eb2e99 | 937 | unsigned long len; |
d334a491 | 938 | |
7ad6e943 HY |
939 | ghes = platform_get_drvdata(ghes_dev); |
940 | generic = ghes->generic; | |
941 | ||
81e88fdc | 942 | ghes->flags |= GHES_EXITING; |
7ad6e943 | 943 | switch (generic->notify.type) { |
81e88fdc HY |
944 | case ACPI_HEST_NOTIFY_POLLED: |
945 | del_timer_sync(&ghes->timer); | |
946 | break; | |
947 | case ACPI_HEST_NOTIFY_EXTERNAL: | |
948 | free_irq(ghes->irq, ghes); | |
949 | break; | |
7ad6e943 HY |
950 | case ACPI_HEST_NOTIFY_SCI: |
951 | mutex_lock(&ghes_list_mutex); | |
952 | list_del_rcu(&ghes->list); | |
953 | if (list_empty(&ghes_sci)) | |
954 | unregister_acpi_hed_notifier(&ghes_notifier_sci); | |
955 | mutex_unlock(&ghes_list_mutex); | |
956 | break; | |
81e88fdc HY |
957 | case ACPI_HEST_NOTIFY_NMI: |
958 | mutex_lock(&ghes_list_mutex); | |
959 | list_del_rcu(&ghes->list); | |
960 | if (list_empty(&ghes_nmi)) | |
9c48f1c6 | 961 | unregister_nmi_handler(NMI_LOCAL, "ghes"); |
81e88fdc HY |
962 | mutex_unlock(&ghes_list_mutex); |
963 | /* | |
964 | * To synchronize with NMI handler, ghes can only be | |
965 | * freed after NMI handler finishes. | |
966 | */ | |
967 | synchronize_rcu(); | |
67eb2e99 HY |
968 | len = ghes_esource_prealloc_size(generic); |
969 | ghes_estatus_pool_shrink(len); | |
81e88fdc | 970 | break; |
7ad6e943 HY |
971 | default: |
972 | BUG(); | |
973 | break; | |
974 | } | |
d334a491 | 975 | |
7ad6e943 HY |
976 | ghes_fini(ghes); |
977 | kfree(ghes); | |
d334a491 | 978 | |
7ad6e943 HY |
979 | platform_set_drvdata(ghes_dev, NULL); |
980 | ||
981 | return 0; | |
d334a491 HY |
982 | } |
983 | ||
7ad6e943 HY |
984 | static struct platform_driver ghes_platform_driver = { |
985 | .driver = { | |
986 | .name = "GHES", | |
987 | .owner = THIS_MODULE, | |
988 | }, | |
989 | .probe = ghes_probe, | |
990 | .remove = ghes_remove, | |
991 | }; | |
992 | ||
d334a491 HY |
993 | static int __init ghes_init(void) |
994 | { | |
81e88fdc HY |
995 | int rc; |
996 | ||
d334a491 HY |
997 | if (acpi_disabled) |
998 | return -ENODEV; | |
999 | ||
1000 | if (hest_disable) { | |
1001 | pr_info(GHES_PFX "HEST is not enabled!\n"); | |
1002 | return -EINVAL; | |
1003 | } | |
1004 | ||
b6a95016 HY |
1005 | if (ghes_disable) { |
1006 | pr_info(GHES_PFX "GHES is not enabled!\n"); | |
1007 | return -EINVAL; | |
1008 | } | |
1009 | ||
67eb2e99 HY |
1010 | init_irq_work(&ghes_proc_irq_work, ghes_proc_in_irq); |
1011 | ||
81e88fdc HY |
1012 | rc = ghes_ioremap_init(); |
1013 | if (rc) | |
1014 | goto err; | |
1015 | ||
67eb2e99 | 1016 | rc = ghes_estatus_pool_init(); |
81e88fdc HY |
1017 | if (rc) |
1018 | goto err_ioremap_exit; | |
1019 | ||
152cef40 HY |
1020 | rc = ghes_estatus_pool_expand(GHES_ESTATUS_CACHE_AVG_SIZE * |
1021 | GHES_ESTATUS_CACHE_ALLOCED_MAX); | |
1022 | if (rc) | |
1023 | goto err_pool_exit; | |
1024 | ||
67eb2e99 HY |
1025 | rc = platform_driver_register(&ghes_platform_driver); |
1026 | if (rc) | |
1027 | goto err_pool_exit; | |
1028 | ||
9fb0bfe1 HY |
1029 | rc = apei_osc_setup(); |
1030 | if (rc == 0 && osc_sb_apei_support_acked) | |
1031 | pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit and WHEA _OSC.\n"); | |
1032 | else if (rc == 0 && !osc_sb_apei_support_acked) | |
1033 | pr_info(GHES_PFX "APEI firmware first mode is enabled by WHEA _OSC.\n"); | |
1034 | else if (rc && osc_sb_apei_support_acked) | |
1035 | pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit.\n"); | |
1036 | else | |
1037 | pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n"); | |
1038 | ||
81e88fdc | 1039 | return 0; |
67eb2e99 HY |
1040 | err_pool_exit: |
1041 | ghes_estatus_pool_exit(); | |
81e88fdc HY |
1042 | err_ioremap_exit: |
1043 | ghes_ioremap_exit(); | |
1044 | err: | |
1045 | return rc; | |
d334a491 HY |
1046 | } |
1047 | ||
1048 | static void __exit ghes_exit(void) | |
1049 | { | |
7ad6e943 | 1050 | platform_driver_unregister(&ghes_platform_driver); |
67eb2e99 | 1051 | ghes_estatus_pool_exit(); |
81e88fdc | 1052 | ghes_ioremap_exit(); |
d334a491 HY |
1053 | } |
1054 | ||
1055 | module_init(ghes_init); | |
1056 | module_exit(ghes_exit); | |
1057 | ||
1058 | MODULE_AUTHOR("Huang Ying"); | |
1059 | MODULE_DESCRIPTION("APEI Generic Hardware Error Source support"); | |
1060 | MODULE_LICENSE("GPL"); | |
7ad6e943 | 1061 | MODULE_ALIAS("platform:GHES"); |