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This client driver allows you to use a GPIO pin as a source for PPS
[linux-2.6/next.git] / drivers / s390 / char / zcore.c
blobf4f1da213e2896617f63dfcfad20ce43a99beedb
1 /*
2 * zcore module to export memory content and register sets for creating system
3 * dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same
4 * dump format as s390 standalone dumps.
5 *
6 * For more information please refer to Documentation/s390/zfcpdump.txt
7 *
8 * Copyright IBM Corp. 2003,2008
9 * Author(s): Michael Holzheu
10 */
11
12 #define KMSG_COMPONENT "zdump"
13 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
14
15 #include <linux/init.h>
16 #include <linux/slab.h>
17 #include <linux/miscdevice.h>
18 #include <linux/debugfs.h>
19 #include <asm/asm-offsets.h>
20 #include <asm/ipl.h>
21 #include <asm/sclp.h>
22 #include <asm/setup.h>
23 #include <asm/sigp.h>
24 #include <asm/uaccess.h>
25 #include <asm/debug.h>
26 #include <asm/processor.h>
27 #include <asm/irqflags.h>
28 #include <asm/checksum.h>
29 #include "sclp.h"
30
31 #define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x)
32
33 #define TO_USER 0
34 #define TO_KERNEL 1
35 #define CHUNK_INFO_SIZE 34 /* 2 16-byte char, each followed by blank */
36
37 enum arch_id {
38 ARCH_S390 = 0,
39 ARCH_S390X = 1,
40 };
41
42 /* dump system info */
43
44 struct sys_info {
45 enum arch_id arch;
46 unsigned long sa_base;
47 u32 sa_size;
48 int cpu_map[NR_CPUS];
49 unsigned long mem_size;
50 struct save_area lc_mask;
51 };
52
53 struct ipib_info {
54 unsigned long ipib;
55 u32 checksum;
56 } __attribute__((packed));
57
58 static struct sys_info sys_info;
59 static struct debug_info *zcore_dbf;
60 static int hsa_available;
61 static struct dentry *zcore_dir;
62 static struct dentry *zcore_file;
63 static struct dentry *zcore_memmap_file;
64 static struct dentry *zcore_reipl_file;
65 static struct ipl_parameter_block *ipl_block;
66
67 /*
68 * Copy memory from HSA to kernel or user memory (not reentrant):
69 *
70 * @dest: Kernel or user buffer where memory should be copied to
71 * @src: Start address within HSA where data should be copied
72 * @count: Size of buffer, which should be copied
73 * @mode: Either TO_KERNEL or TO_USER
74 */
75 static int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode)
76 {
77 int offs, blk_num;
78 static char buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
79
80 if (count == 0)
81 return 0;
82
83 /* copy first block */
84 offs = 0;
85 if ((src % PAGE_SIZE) != 0) {
86 blk_num = src / PAGE_SIZE + 2;
87 if (sclp_sdias_copy(buf, blk_num, 1)) {
88 TRACE("sclp_sdias_copy() failed\n");
89 return -EIO;
90 }
91 offs = min((PAGE_SIZE - (src % PAGE_SIZE)), count);
92 if (mode == TO_USER) {
93 if (copy_to_user((__force __user void*) dest,
94 buf + (src % PAGE_SIZE), offs))
95 return -EFAULT;
96 } else
97 memcpy(dest, buf + (src % PAGE_SIZE), offs);
98 }
99 if (offs == count)
100 goto out;
101
102 /* copy middle */
103 for (; (offs + PAGE_SIZE) <= count; offs += PAGE_SIZE) {
104 blk_num = (src + offs) / PAGE_SIZE + 2;
105 if (sclp_sdias_copy(buf, blk_num, 1)) {
106 TRACE("sclp_sdias_copy() failed\n");
107 return -EIO;
108 }
109 if (mode == TO_USER) {
110 if (copy_to_user((__force __user void*) dest + offs,
111 buf, PAGE_SIZE))
112 return -EFAULT;
113 } else
114 memcpy(dest + offs, buf, PAGE_SIZE);
115 }
116 if (offs == count)
117 goto out;
118
119 /* copy last block */
120 blk_num = (src + offs) / PAGE_SIZE + 2;
121 if (sclp_sdias_copy(buf, blk_num, 1)) {
122 TRACE("sclp_sdias_copy() failed\n");
123 return -EIO;
124 }
125 if (mode == TO_USER) {
126 if (copy_to_user((__force __user void*) dest + offs, buf,
127 PAGE_SIZE))
128 return -EFAULT;
129 } else
130 memcpy(dest + offs, buf, count - offs);
131 out:
132 return 0;
133 }
134
135 static int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count)
136 {
137 return memcpy_hsa((void __force *) dest, src, count, TO_USER);
138 }
139
140 static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count)
141 {
142 return memcpy_hsa(dest, src, count, TO_KERNEL);
143 }
144
145 static int __init init_cpu_info(enum arch_id arch)
146 {
147 struct save_area *sa;
148
149 /* get info for boot cpu from lowcore, stored in the HSA */
150
151 sa = kmalloc(sizeof(*sa), GFP_KERNEL);
152 if (!sa)
153 return -ENOMEM;
154 if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) {
155 TRACE("could not copy from HSA\n");
156 kfree(sa);
157 return -EIO;
158 }
159 zfcpdump_save_areas[0] = sa;
160 return 0;
161 }
162
163 static DEFINE_MUTEX(zcore_mutex);
164
165 #define DUMP_VERSION 0x5
166 #define DUMP_MAGIC 0xa8190173618f23fdULL
167 #define DUMP_ARCH_S390X 2
168 #define DUMP_ARCH_S390 1
169 #define HEADER_SIZE 4096
170
171 /* dump header dumped according to s390 crash dump format */
172
173 struct zcore_header {
174 u64 magic;
175 u32 version;
176 u32 header_size;
177 u32 dump_level;
178 u32 page_size;
179 u64 mem_size;
180 u64 mem_start;
181 u64 mem_end;
182 u32 num_pages;
183 u32 pad1;
184 u64 tod;
185 struct cpuid cpu_id;
186 u32 arch_id;
187 u32 volnr;
188 u32 build_arch;
189 u64 rmem_size;
190 u8 mvdump;
191 u16 cpu_cnt;
192 u16 real_cpu_cnt;
193 u8 end_pad1[0x200-0x061];
194 u64 mvdump_sign;
195 u64 mvdump_zipl_time;
196 u8 end_pad2[0x800-0x210];
197 u32 lc_vec[512];
198 } __attribute__((packed,__aligned__(16)));
199
200 static struct zcore_header zcore_header = {
201 .magic = DUMP_MAGIC,
202 .version = DUMP_VERSION,
203 .header_size = 4096,
204 .dump_level = 0,
205 .page_size = PAGE_SIZE,
206 .mem_start = 0,
207 #ifdef CONFIG_64BIT
208 .build_arch = DUMP_ARCH_S390X,
209 #else
210 .build_arch = DUMP_ARCH_S390,
211 #endif
212 };
213
214 /*
215 * Copy lowcore info to buffer. Use map in order to copy only register parts.
216 *
217 * @buf: User buffer
218 * @sa: Pointer to save area
219 * @sa_off: Offset in save area to copy
220 * @len: Number of bytes to copy
221 */
222 static int copy_lc(void __user *buf, void *sa, int sa_off, int len)
223 {
224 int i;
225 char *lc_mask = (char*)&sys_info.lc_mask;
226
227 for (i = 0; i < len; i++) {
228 if (!lc_mask[i + sa_off])
229 continue;
230 if (copy_to_user(buf + i, sa + sa_off + i, 1))
231 return -EFAULT;
232 }
233 return 0;
234 }
235
236 /*
237 * Copy lowcores info to memory, if necessary
238 *
239 * @buf: User buffer
240 * @addr: Start address of buffer in dump memory
241 * @count: Size of buffer
242 */
243 static int zcore_add_lc(char __user *buf, unsigned long start, size_t count)
244 {
245 unsigned long end;
246 int i = 0;
247
248 if (count == 0)
249 return 0;
250
251 end = start + count;
252 while (zfcpdump_save_areas[i]) {
253 unsigned long cp_start, cp_end; /* copy range */
254 unsigned long sa_start, sa_end; /* save area range */
255 unsigned long prefix;
256 unsigned long sa_off, len, buf_off;
257
258 prefix = zfcpdump_save_areas[i]->pref_reg;
259 sa_start = prefix + sys_info.sa_base;
260 sa_end = prefix + sys_info.sa_base + sys_info.sa_size;
261
262 if ((end < sa_start) || (start > sa_end))
263 goto next;
264 cp_start = max(start, sa_start);
265 cp_end = min(end, sa_end);
266
267 buf_off = cp_start - start;
268 sa_off = cp_start - sa_start;
269 len = cp_end - cp_start;
270
271 TRACE("copy_lc for: %lx\n", start);
272 if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len))
273 return -EFAULT;
274 next:
275 i++;
276 }
277 return 0;
278 }
279
280 /*
281 * Read routine for zcore character device
282 * First 4K are dump header
283 * Next 32MB are HSA Memory
284 * Rest is read from absolute Memory
285 */
286 static ssize_t zcore_read(struct file *file, char __user *buf, size_t count,
287 loff_t *ppos)
288 {
289 unsigned long mem_start; /* Start address in memory */
290 size_t mem_offs; /* Offset in dump memory */
291 size_t hdr_count; /* Size of header part of output buffer */
292 size_t size;
293 int rc;
294
295 mutex_lock(&zcore_mutex);
296
297 if (*ppos > (sys_info.mem_size + HEADER_SIZE)) {
298 rc = -EINVAL;
299 goto fail;
300 }
301
302 count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos));
303
304 /* Copy dump header */
305 if (*ppos < HEADER_SIZE) {
306 size = min(count, (size_t) (HEADER_SIZE - *ppos));
307 if (copy_to_user(buf, &zcore_header + *ppos, size)) {
308 rc = -EFAULT;
309 goto fail;
310 }
311 hdr_count = size;
312 mem_start = 0;
313 } else {
314 hdr_count = 0;
315 mem_start = *ppos - HEADER_SIZE;
316 }
317
318 mem_offs = 0;
319
320 /* Copy from HSA data */
321 if (*ppos < (ZFCPDUMP_HSA_SIZE + HEADER_SIZE)) {
322 size = min((count - hdr_count), (size_t) (ZFCPDUMP_HSA_SIZE
323 - mem_start));
324 rc = memcpy_hsa_user(buf + hdr_count, mem_start, size);
325 if (rc)
326 goto fail;
327
328 mem_offs += size;
329 }
330
331 /* Copy from real mem */
332 size = count - mem_offs - hdr_count;
333 rc = copy_to_user_real(buf + hdr_count + mem_offs,
334 (void *) mem_start + mem_offs, size);
335 if (rc)
336 goto fail;
337
338 /*
339 * Since s390 dump analysis tools like lcrash or crash
340 * expect register sets in the prefix pages of the cpus,
341 * we copy them into the read buffer, if necessary.
342 * buf + hdr_count: Start of memory part of output buffer
343 * mem_start: Start memory address to copy from
344 * count - hdr_count: Size of memory area to copy
345 */
346 if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) {
347 rc = -EFAULT;
348 goto fail;
349 }
350 *ppos += count;
351 fail:
352 mutex_unlock(&zcore_mutex);
353 return (rc < 0) ? rc : count;
354 }
355
356 static int zcore_open(struct inode *inode, struct file *filp)
357 {
358 if (!hsa_available)
359 return -ENODATA;
360 else
361 return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
362 }
363
364 static int zcore_release(struct inode *inode, struct file *filep)
365 {
366 diag308(DIAG308_REL_HSA, NULL);
367 hsa_available = 0;
368 return 0;
369 }
370
371 static loff_t zcore_lseek(struct file *file, loff_t offset, int orig)
372 {
373 loff_t rc;
374
375 mutex_lock(&zcore_mutex);
376 switch (orig) {
377 case 0:
378 file->f_pos = offset;
379 rc = file->f_pos;
380 break;
381 case 1:
382 file->f_pos += offset;
383 rc = file->f_pos;
384 break;
385 default:
386 rc = -EINVAL;
387 }
388 mutex_unlock(&zcore_mutex);
389 return rc;
390 }
391
392 static const struct file_operations zcore_fops = {
393 .owner = THIS_MODULE,
394 .llseek = zcore_lseek,
395 .read = zcore_read,
396 .open = zcore_open,
397 .release = zcore_release,
398 };
399
400 static ssize_t zcore_memmap_read(struct file *filp, char __user *buf,
401 size_t count, loff_t *ppos)
402 {
403 return simple_read_from_buffer(buf, count, ppos, filp->private_data,
404 MEMORY_CHUNKS * CHUNK_INFO_SIZE);
405 }
406
407 static int zcore_memmap_open(struct inode *inode, struct file *filp)
408 {
409 int i;
410 char *buf;
411 struct mem_chunk *chunk_array;
412
413 chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk),
414 GFP_KERNEL);
415 if (!chunk_array)
416 return -ENOMEM;
417 detect_memory_layout(chunk_array);
418 buf = kzalloc(MEMORY_CHUNKS * CHUNK_INFO_SIZE, GFP_KERNEL);
419 if (!buf) {
420 kfree(chunk_array);
421 return -ENOMEM;
422 }
423 for (i = 0; i < MEMORY_CHUNKS; i++) {
424 sprintf(buf + (i * CHUNK_INFO_SIZE), "%016llx %016llx ",
425 (unsigned long long) chunk_array[i].addr,
426 (unsigned long long) chunk_array[i].size);
427 if (chunk_array[i].size == 0)
428 break;
429 }
430 kfree(chunk_array);
431 filp->private_data = buf;
432 return nonseekable_open(inode, filp);
433 }
434
435 static int zcore_memmap_release(struct inode *inode, struct file *filp)
436 {
437 kfree(filp->private_data);
438 return 0;
439 }
440
441 static const struct file_operations zcore_memmap_fops = {
442 .owner = THIS_MODULE,
443 .read = zcore_memmap_read,
444 .open = zcore_memmap_open,
445 .release = zcore_memmap_release,
446 .llseek = no_llseek,
447 };
448
449 static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf,
450 size_t count, loff_t *ppos)
451 {
452 if (ipl_block) {
453 diag308(DIAG308_SET, ipl_block);
454 diag308(DIAG308_IPL, NULL);
455 }
456 return count;
457 }
458
459 static int zcore_reipl_open(struct inode *inode, struct file *filp)
460 {
461 return nonseekable_open(inode, filp);
462 }
463
464 static int zcore_reipl_release(struct inode *inode, struct file *filp)
465 {
466 return 0;
467 }
468
469 static const struct file_operations zcore_reipl_fops = {
470 .owner = THIS_MODULE,
471 .write = zcore_reipl_write,
472 .open = zcore_reipl_open,
473 .release = zcore_reipl_release,
474 .llseek = no_llseek,
475 };
476
477 #ifdef CONFIG_32BIT
478
479 static void __init set_lc_mask(struct save_area *map)
480 {
481 memset(&map->ext_save, 0xff, sizeof(map->ext_save));
482 memset(&map->timer, 0xff, sizeof(map->timer));
483 memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp));
484 memset(&map->psw, 0xff, sizeof(map->psw));
485 memset(&map->pref_reg, 0xff, sizeof(map->pref_reg));
486 memset(&map->acc_regs, 0xff, sizeof(map->acc_regs));
487 memset(&map->fp_regs, 0xff, sizeof(map->fp_regs));
488 memset(&map->gp_regs, 0xff, sizeof(map->gp_regs));
489 memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs));
490 }
491
492 #else /* CONFIG_32BIT */
493
494 static void __init set_lc_mask(struct save_area *map)
495 {
496 memset(&map->fp_regs, 0xff, sizeof(map->fp_regs));
497 memset(&map->gp_regs, 0xff, sizeof(map->gp_regs));
498 memset(&map->psw, 0xff, sizeof(map->psw));
499 memset(&map->pref_reg, 0xff, sizeof(map->pref_reg));
500 memset(&map->fp_ctrl_reg, 0xff, sizeof(map->fp_ctrl_reg));
501 memset(&map->tod_reg, 0xff, sizeof(map->tod_reg));
502 memset(&map->timer, 0xff, sizeof(map->timer));
503 memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp));
504 memset(&map->acc_regs, 0xff, sizeof(map->acc_regs));
505 memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs));
506 }
507
508 #endif /* CONFIG_32BIT */
509
510 /*
511 * Initialize dump globals for a given architecture
512 */
513 static int __init sys_info_init(enum arch_id arch)
514 {
515 int rc;
516
517 switch (arch) {
518 case ARCH_S390X:
519 pr_alert("DETECTED 'S390X (64 bit) OS'\n");
520 break;
521 case ARCH_S390:
522 pr_alert("DETECTED 'S390 (32 bit) OS'\n");
523 break;
524 default:
525 pr_alert("0x%x is an unknown architecture.\n",arch);
526 return -EINVAL;
527 }
528 sys_info.sa_base = SAVE_AREA_BASE;
529 sys_info.sa_size = sizeof(struct save_area);
530 sys_info.arch = arch;
531 set_lc_mask(&sys_info.lc_mask);
532 rc = init_cpu_info(arch);
533 if (rc)
534 return rc;
535 sys_info.mem_size = real_memory_size;
536
537 return 0;
538 }
539
540 static int __init check_sdias(void)
541 {
542 int rc, act_hsa_size;
543
544 rc = sclp_sdias_blk_count();
545 if (rc < 0) {
546 TRACE("Could not determine HSA size\n");
547 return rc;
548 }
549 act_hsa_size = (rc - 1) * PAGE_SIZE;
550 if (act_hsa_size < ZFCPDUMP_HSA_SIZE) {
551 TRACE("HSA size too small: %i\n", act_hsa_size);
552 return -EINVAL;
553 }
554 return 0;
555 }
556
557 static int __init get_mem_size(unsigned long *mem)
558 {
559 int i;
560 struct mem_chunk *chunk_array;
561
562 chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk),
563 GFP_KERNEL);
564 if (!chunk_array)
565 return -ENOMEM;
566 detect_memory_layout(chunk_array);
567 for (i = 0; i < MEMORY_CHUNKS; i++) {
568 if (chunk_array[i].size == 0)
569 break;
570 *mem += chunk_array[i].size;
571 }
572 kfree(chunk_array);
573 return 0;
574 }
575
576 static int __init zcore_header_init(int arch, struct zcore_header *hdr)
577 {
578 int rc, i;
579 unsigned long memory = 0;
580 u32 prefix;
581
582 if (arch == ARCH_S390X)
583 hdr->arch_id = DUMP_ARCH_S390X;
584 else
585 hdr->arch_id = DUMP_ARCH_S390;
586 rc = get_mem_size(&memory);
587 if (rc)
588 return rc;
589 hdr->mem_size = memory;
590 hdr->rmem_size = memory;
591 hdr->mem_end = sys_info.mem_size;
592 hdr->num_pages = memory / PAGE_SIZE;
593 hdr->tod = get_clock();
594 get_cpu_id(&hdr->cpu_id);
595 for (i = 0; zfcpdump_save_areas[i]; i++) {
596 prefix = zfcpdump_save_areas[i]->pref_reg;
597 hdr->real_cpu_cnt++;
598 if (!prefix)
599 continue;
600 hdr->lc_vec[hdr->cpu_cnt] = prefix;
601 hdr->cpu_cnt++;
602 }
603 return 0;
604 }
605
606 /*
607 * Provide IPL parameter information block from either HSA or memory
608 * for future reipl
609 */
610 static int __init zcore_reipl_init(void)
611 {
612 struct ipib_info ipib_info;
613 int rc;
614
615 rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info));
616 if (rc)
617 return rc;
618 if (ipib_info.ipib == 0)
619 return 0;
620 ipl_block = (void *) __get_free_page(GFP_KERNEL);
621 if (!ipl_block)
622 return -ENOMEM;
623 if (ipib_info.ipib < ZFCPDUMP_HSA_SIZE)
624 rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
625 else
626 rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE);
627 if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
628 ipib_info.checksum) {
629 TRACE("Checksum does not match\n");
630 free_page((unsigned long) ipl_block);
631 ipl_block = NULL;
632 }
633 return 0;
634 }
635
636 static int __init zcore_init(void)
637 {
638 unsigned char arch;
639 int rc;
640
641 if (ipl_info.type != IPL_TYPE_FCP_DUMP)
642 return -ENODATA;
643
644 zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long));
645 debug_register_view(zcore_dbf, &debug_sprintf_view);
646 debug_set_level(zcore_dbf, 6);
647
648 TRACE("devno: %x\n", ipl_info.data.fcp.dev_id.devno);
649 TRACE("wwpn: %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn);
650 TRACE("lun: %llx\n", (unsigned long long) ipl_info.data.fcp.lun);
651
652 rc = sclp_sdias_init();
653 if (rc)
654 goto fail;
655
656 rc = check_sdias();
657 if (rc)
658 goto fail;
659
660 rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1);
661 if (rc)
662 goto fail;
663
664 #ifdef CONFIG_64BIT
665 if (arch == ARCH_S390) {
666 pr_alert("The 64-bit dump tool cannot be used for a "
667 "32-bit system\n");
668 rc = -EINVAL;
669 goto fail;
670 }
671 #else /* CONFIG_64BIT */
672 if (arch == ARCH_S390X) {
673 pr_alert("The 32-bit dump tool cannot be used for a "
674 "64-bit system\n");
675 rc = -EINVAL;
676 goto fail;
677 }
678 #endif /* CONFIG_64BIT */
679
680 rc = sys_info_init(arch);
681 if (rc)
682 goto fail;
683
684 rc = zcore_header_init(arch, &zcore_header);
685 if (rc)
686 goto fail;
687
688 rc = zcore_reipl_init();
689 if (rc)
690 goto fail;
691
692 zcore_dir = debugfs_create_dir("zcore" , NULL);
693 if (!zcore_dir) {
694 rc = -ENOMEM;
695 goto fail;
696 }
697 zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL,
698 &zcore_fops);
699 if (!zcore_file) {
700 rc = -ENOMEM;
701 goto fail_dir;
702 }
703 zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir,
704 NULL, &zcore_memmap_fops);
705 if (!zcore_memmap_file) {
706 rc = -ENOMEM;
707 goto fail_file;
708 }
709 zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir,
710 NULL, &zcore_reipl_fops);
711 if (!zcore_reipl_file) {
712 rc = -ENOMEM;
713 goto fail_memmap_file;
714 }
715 hsa_available = 1;
716 return 0;
717
718 fail_memmap_file:
719 debugfs_remove(zcore_memmap_file);
720 fail_file:
721 debugfs_remove(zcore_file);
722 fail_dir:
723 debugfs_remove(zcore_dir);
724 fail:
725 diag308(DIAG308_REL_HSA, NULL);
726 return rc;
727 }
728
729 static void __exit zcore_exit(void)
730 {
731 debug_unregister(zcore_dbf);
732 sclp_sdias_exit();
733 free_page((unsigned long) ipl_block);
734 debugfs_remove(zcore_reipl_file);
735 debugfs_remove(zcore_memmap_file);
736 debugfs_remove(zcore_file);
737 debugfs_remove(zcore_dir);
738 diag308(DIAG308_REL_HSA, NULL);
739 }
740
741 MODULE_AUTHOR("Copyright IBM Corp. 2003,2008");
742 MODULE_DESCRIPTION("zcore module for zfcpdump support");
743 MODULE_LICENSE("GPL");
744
745 subsys_initcall(zcore_init);
746 module_exit(zcore_exit);
linux-next