Commit | Line | Data |
---|---|---|
411ed322 MH |
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 | * | |
099b7651 | 8 | * Copyright IBM Corp. 2003,2008 |
411ed322 MH |
9 | * Author(s): Michael Holzheu |
10 | */ | |
11 | ||
17159dc6 MH |
12 | #define KMSG_COMPONENT "zdump" |
13 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
14 | ||
411ed322 | 15 | #include <linux/init.h> |
5a0e3ad6 | 16 | #include <linux/slab.h> |
411ed322 | 17 | #include <linux/miscdevice.h> |
411ed322 | 18 | #include <linux/debugfs.h> |
3948a102 | 19 | #include <linux/module.h> |
cbb870c8 | 20 | #include <asm/asm-offsets.h> |
411ed322 MH |
21 | #include <asm/ipl.h> |
22 | #include <asm/sclp.h> | |
23 | #include <asm/setup.h> | |
24 | #include <asm/sigp.h> | |
25 | #include <asm/uaccess.h> | |
26 | #include <asm/debug.h> | |
27 | #include <asm/processor.h> | |
28 | #include <asm/irqflags.h> | |
159d1ff8 | 29 | #include <asm/checksum.h> |
763968e2 | 30 | #include "sclp.h" |
411ed322 MH |
31 | |
32 | #define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x) | |
411ed322 MH |
33 | |
34 | #define TO_USER 0 | |
35 | #define TO_KERNEL 1 | |
12e0c95e | 36 | #define CHUNK_INFO_SIZE 34 /* 2 16-byte char, each followed by blank */ |
411ed322 MH |
37 | |
38 | enum arch_id { | |
39 | ARCH_S390 = 0, | |
40 | ARCH_S390X = 1, | |
41 | }; | |
42 | ||
43 | /* dump system info */ | |
44 | ||
45 | struct sys_info { | |
f64ca217 HC |
46 | enum arch_id arch; |
47 | unsigned long sa_base; | |
48 | u32 sa_size; | |
49 | int cpu_map[NR_CPUS]; | |
50 | unsigned long mem_size; | |
51 | struct save_area lc_mask; | |
411ed322 MH |
52 | }; |
53 | ||
099b7651 FM |
54 | struct ipib_info { |
55 | unsigned long ipib; | |
56 | u32 checksum; | |
57 | } __attribute__((packed)); | |
58 | ||
411ed322 MH |
59 | static struct sys_info sys_info; |
60 | static struct debug_info *zcore_dbf; | |
61 | static int hsa_available; | |
62 | static struct dentry *zcore_dir; | |
63 | static struct dentry *zcore_file; | |
12e0c95e | 64 | static struct dentry *zcore_memmap_file; |
099b7651 FM |
65 | static struct dentry *zcore_reipl_file; |
66 | static struct ipl_parameter_block *ipl_block; | |
411ed322 MH |
67 | |
68 | /* | |
69 | * Copy memory from HSA to kernel or user memory (not reentrant): | |
70 | * | |
71 | * @dest: Kernel or user buffer where memory should be copied to | |
72 | * @src: Start address within HSA where data should be copied | |
73 | * @count: Size of buffer, which should be copied | |
74 | * @mode: Either TO_KERNEL or TO_USER | |
75 | */ | |
76 | static int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode) | |
77 | { | |
78 | int offs, blk_num; | |
79 | static char buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); | |
80 | ||
81 | if (count == 0) | |
82 | return 0; | |
83 | ||
84 | /* copy first block */ | |
85 | offs = 0; | |
86 | if ((src % PAGE_SIZE) != 0) { | |
87 | blk_num = src / PAGE_SIZE + 2; | |
88 | if (sclp_sdias_copy(buf, blk_num, 1)) { | |
89 | TRACE("sclp_sdias_copy() failed\n"); | |
90 | return -EIO; | |
91 | } | |
92 | offs = min((PAGE_SIZE - (src % PAGE_SIZE)), count); | |
93 | if (mode == TO_USER) { | |
94 | if (copy_to_user((__force __user void*) dest, | |
95 | buf + (src % PAGE_SIZE), offs)) | |
96 | return -EFAULT; | |
97 | } else | |
98 | memcpy(dest, buf + (src % PAGE_SIZE), offs); | |
99 | } | |
100 | if (offs == count) | |
101 | goto out; | |
102 | ||
103 | /* copy middle */ | |
104 | for (; (offs + PAGE_SIZE) <= count; offs += PAGE_SIZE) { | |
105 | blk_num = (src + offs) / PAGE_SIZE + 2; | |
106 | if (sclp_sdias_copy(buf, blk_num, 1)) { | |
107 | TRACE("sclp_sdias_copy() failed\n"); | |
108 | return -EIO; | |
109 | } | |
110 | if (mode == TO_USER) { | |
111 | if (copy_to_user((__force __user void*) dest + offs, | |
112 | buf, PAGE_SIZE)) | |
113 | return -EFAULT; | |
114 | } else | |
115 | memcpy(dest + offs, buf, PAGE_SIZE); | |
116 | } | |
117 | if (offs == count) | |
118 | goto out; | |
119 | ||
120 | /* copy last block */ | |
121 | blk_num = (src + offs) / PAGE_SIZE + 2; | |
122 | if (sclp_sdias_copy(buf, blk_num, 1)) { | |
123 | TRACE("sclp_sdias_copy() failed\n"); | |
124 | return -EIO; | |
125 | } | |
126 | if (mode == TO_USER) { | |
127 | if (copy_to_user((__force __user void*) dest + offs, buf, | |
128 | PAGE_SIZE)) | |
129 | return -EFAULT; | |
130 | } else | |
131 | memcpy(dest + offs, buf, count - offs); | |
132 | out: | |
133 | return 0; | |
134 | } | |
135 | ||
136 | static int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count) | |
137 | { | |
138 | return memcpy_hsa((void __force *) dest, src, count, TO_USER); | |
139 | } | |
140 | ||
141 | static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count) | |
142 | { | |
143 | return memcpy_hsa(dest, src, count, TO_KERNEL); | |
144 | } | |
145 | ||
411ed322 MH |
146 | static int __init init_cpu_info(enum arch_id arch) |
147 | { | |
f64ca217 | 148 | struct save_area *sa; |
411ed322 MH |
149 | |
150 | /* get info for boot cpu from lowcore, stored in the HSA */ | |
151 | ||
152 | sa = kmalloc(sizeof(*sa), GFP_KERNEL); | |
2a062ab4 | 153 | if (!sa) |
411ed322 | 154 | return -ENOMEM; |
411ed322 | 155 | if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) { |
2a062ab4 | 156 | TRACE("could not copy from HSA\n"); |
411ed322 MH |
157 | kfree(sa); |
158 | return -EIO; | |
159 | } | |
160 | zfcpdump_save_areas[0] = sa; | |
411ed322 MH |
161 | return 0; |
162 | } | |
163 | ||
164 | static DEFINE_MUTEX(zcore_mutex); | |
165 | ||
0cbde8ee | 166 | #define DUMP_VERSION 0x5 |
411ed322 MH |
167 | #define DUMP_MAGIC 0xa8190173618f23fdULL |
168 | #define DUMP_ARCH_S390X 2 | |
169 | #define DUMP_ARCH_S390 1 | |
170 | #define HEADER_SIZE 4096 | |
171 | ||
172 | /* dump header dumped according to s390 crash dump format */ | |
173 | ||
174 | struct zcore_header { | |
175 | u64 magic; | |
176 | u32 version; | |
177 | u32 header_size; | |
178 | u32 dump_level; | |
179 | u32 page_size; | |
180 | u64 mem_size; | |
181 | u64 mem_start; | |
182 | u64 mem_end; | |
183 | u32 num_pages; | |
184 | u32 pad1; | |
185 | u64 tod; | |
e86a6ed6 | 186 | struct cpuid cpu_id; |
411ed322 | 187 | u32 arch_id; |
ce444823 | 188 | u32 volnr; |
411ed322 | 189 | u32 build_arch; |
ce444823 | 190 | u64 rmem_size; |
0cbde8ee MH |
191 | u8 mvdump; |
192 | u16 cpu_cnt; | |
193 | u16 real_cpu_cnt; | |
194 | u8 end_pad1[0x200-0x061]; | |
195 | u64 mvdump_sign; | |
196 | u64 mvdump_zipl_time; | |
197 | u8 end_pad2[0x800-0x210]; | |
198 | u32 lc_vec[512]; | |
411ed322 MH |
199 | } __attribute__((packed,__aligned__(16))); |
200 | ||
201 | static struct zcore_header zcore_header = { | |
202 | .magic = DUMP_MAGIC, | |
203 | .version = DUMP_VERSION, | |
204 | .header_size = 4096, | |
205 | .dump_level = 0, | |
206 | .page_size = PAGE_SIZE, | |
207 | .mem_start = 0, | |
f64ca217 | 208 | #ifdef CONFIG_64BIT |
411ed322 MH |
209 | .build_arch = DUMP_ARCH_S390X, |
210 | #else | |
211 | .build_arch = DUMP_ARCH_S390, | |
212 | #endif | |
213 | }; | |
214 | ||
215 | /* | |
216 | * Copy lowcore info to buffer. Use map in order to copy only register parts. | |
217 | * | |
218 | * @buf: User buffer | |
219 | * @sa: Pointer to save area | |
220 | * @sa_off: Offset in save area to copy | |
221 | * @len: Number of bytes to copy | |
222 | */ | |
223 | static int copy_lc(void __user *buf, void *sa, int sa_off, int len) | |
224 | { | |
225 | int i; | |
226 | char *lc_mask = (char*)&sys_info.lc_mask; | |
227 | ||
228 | for (i = 0; i < len; i++) { | |
229 | if (!lc_mask[i + sa_off]) | |
230 | continue; | |
231 | if (copy_to_user(buf + i, sa + sa_off + i, 1)) | |
232 | return -EFAULT; | |
233 | } | |
234 | return 0; | |
235 | } | |
236 | ||
237 | /* | |
238 | * Copy lowcores info to memory, if necessary | |
239 | * | |
240 | * @buf: User buffer | |
241 | * @addr: Start address of buffer in dump memory | |
242 | * @count: Size of buffer | |
243 | */ | |
244 | static int zcore_add_lc(char __user *buf, unsigned long start, size_t count) | |
245 | { | |
246 | unsigned long end; | |
247 | int i = 0; | |
248 | ||
249 | if (count == 0) | |
250 | return 0; | |
251 | ||
252 | end = start + count; | |
253 | while (zfcpdump_save_areas[i]) { | |
254 | unsigned long cp_start, cp_end; /* copy range */ | |
255 | unsigned long sa_start, sa_end; /* save area range */ | |
256 | unsigned long prefix; | |
257 | unsigned long sa_off, len, buf_off; | |
258 | ||
f64ca217 | 259 | prefix = zfcpdump_save_areas[i]->pref_reg; |
411ed322 MH |
260 | sa_start = prefix + sys_info.sa_base; |
261 | sa_end = prefix + sys_info.sa_base + sys_info.sa_size; | |
262 | ||
263 | if ((end < sa_start) || (start > sa_end)) | |
264 | goto next; | |
265 | cp_start = max(start, sa_start); | |
266 | cp_end = min(end, sa_end); | |
267 | ||
268 | buf_off = cp_start - start; | |
269 | sa_off = cp_start - sa_start; | |
270 | len = cp_end - cp_start; | |
271 | ||
272 | TRACE("copy_lc for: %lx\n", start); | |
273 | if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len)) | |
274 | return -EFAULT; | |
275 | next: | |
276 | i++; | |
277 | } | |
278 | return 0; | |
279 | } | |
280 | ||
281 | /* | |
282 | * Read routine for zcore character device | |
283 | * First 4K are dump header | |
284 | * Next 32MB are HSA Memory | |
285 | * Rest is read from absolute Memory | |
286 | */ | |
287 | static ssize_t zcore_read(struct file *file, char __user *buf, size_t count, | |
288 | loff_t *ppos) | |
289 | { | |
290 | unsigned long mem_start; /* Start address in memory */ | |
291 | size_t mem_offs; /* Offset in dump memory */ | |
292 | size_t hdr_count; /* Size of header part of output buffer */ | |
293 | size_t size; | |
294 | int rc; | |
295 | ||
296 | mutex_lock(&zcore_mutex); | |
297 | ||
298 | if (*ppos > (sys_info.mem_size + HEADER_SIZE)) { | |
299 | rc = -EINVAL; | |
300 | goto fail; | |
301 | } | |
302 | ||
303 | count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos)); | |
304 | ||
305 | /* Copy dump header */ | |
306 | if (*ppos < HEADER_SIZE) { | |
307 | size = min(count, (size_t) (HEADER_SIZE - *ppos)); | |
308 | if (copy_to_user(buf, &zcore_header + *ppos, size)) { | |
309 | rc = -EFAULT; | |
310 | goto fail; | |
311 | } | |
312 | hdr_count = size; | |
313 | mem_start = 0; | |
314 | } else { | |
315 | hdr_count = 0; | |
316 | mem_start = *ppos - HEADER_SIZE; | |
317 | } | |
318 | ||
319 | mem_offs = 0; | |
320 | ||
321 | /* Copy from HSA data */ | |
322 | if (*ppos < (ZFCPDUMP_HSA_SIZE + HEADER_SIZE)) { | |
323 | size = min((count - hdr_count), (size_t) (ZFCPDUMP_HSA_SIZE | |
324 | - mem_start)); | |
325 | rc = memcpy_hsa_user(buf + hdr_count, mem_start, size); | |
326 | if (rc) | |
327 | goto fail; | |
328 | ||
329 | mem_offs += size; | |
330 | } | |
331 | ||
332 | /* Copy from real mem */ | |
333 | size = count - mem_offs - hdr_count; | |
7f0bf656 MH |
334 | rc = copy_to_user_real(buf + hdr_count + mem_offs, |
335 | (void *) mem_start + mem_offs, size); | |
411ed322 MH |
336 | if (rc) |
337 | goto fail; | |
338 | ||
339 | /* | |
340 | * Since s390 dump analysis tools like lcrash or crash | |
341 | * expect register sets in the prefix pages of the cpus, | |
342 | * we copy them into the read buffer, if necessary. | |
343 | * buf + hdr_count: Start of memory part of output buffer | |
344 | * mem_start: Start memory address to copy from | |
345 | * count - hdr_count: Size of memory area to copy | |
346 | */ | |
347 | if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) { | |
348 | rc = -EFAULT; | |
349 | goto fail; | |
350 | } | |
351 | *ppos += count; | |
352 | fail: | |
353 | mutex_unlock(&zcore_mutex); | |
354 | return (rc < 0) ? rc : count; | |
355 | } | |
356 | ||
357 | static int zcore_open(struct inode *inode, struct file *filp) | |
358 | { | |
359 | if (!hsa_available) | |
360 | return -ENODATA; | |
361 | else | |
362 | return capable(CAP_SYS_RAWIO) ? 0 : -EPERM; | |
363 | } | |
364 | ||
365 | static int zcore_release(struct inode *inode, struct file *filep) | |
366 | { | |
367 | diag308(DIAG308_REL_HSA, NULL); | |
368 | hsa_available = 0; | |
369 | return 0; | |
370 | } | |
371 | ||
372 | static loff_t zcore_lseek(struct file *file, loff_t offset, int orig) | |
373 | { | |
374 | loff_t rc; | |
375 | ||
376 | mutex_lock(&zcore_mutex); | |
377 | switch (orig) { | |
378 | case 0: | |
379 | file->f_pos = offset; | |
380 | rc = file->f_pos; | |
381 | break; | |
382 | case 1: | |
383 | file->f_pos += offset; | |
384 | rc = file->f_pos; | |
385 | break; | |
386 | default: | |
387 | rc = -EINVAL; | |
388 | } | |
389 | mutex_unlock(&zcore_mutex); | |
390 | return rc; | |
391 | } | |
392 | ||
5c81cdbe | 393 | static const struct file_operations zcore_fops = { |
411ed322 MH |
394 | .owner = THIS_MODULE, |
395 | .llseek = zcore_lseek, | |
396 | .read = zcore_read, | |
397 | .open = zcore_open, | |
398 | .release = zcore_release, | |
399 | }; | |
400 | ||
12e0c95e FM |
401 | static ssize_t zcore_memmap_read(struct file *filp, char __user *buf, |
402 | size_t count, loff_t *ppos) | |
403 | { | |
404 | return simple_read_from_buffer(buf, count, ppos, filp->private_data, | |
405 | MEMORY_CHUNKS * CHUNK_INFO_SIZE); | |
406 | } | |
407 | ||
408 | static int zcore_memmap_open(struct inode *inode, struct file *filp) | |
409 | { | |
410 | int i; | |
411 | char *buf; | |
412 | struct mem_chunk *chunk_array; | |
413 | ||
414 | chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk), | |
415 | GFP_KERNEL); | |
416 | if (!chunk_array) | |
417 | return -ENOMEM; | |
418 | detect_memory_layout(chunk_array); | |
419 | buf = kzalloc(MEMORY_CHUNKS * CHUNK_INFO_SIZE, GFP_KERNEL); | |
420 | if (!buf) { | |
421 | kfree(chunk_array); | |
422 | return -ENOMEM; | |
423 | } | |
424 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
425 | sprintf(buf + (i * CHUNK_INFO_SIZE), "%016llx %016llx ", | |
426 | (unsigned long long) chunk_array[i].addr, | |
427 | (unsigned long long) chunk_array[i].size); | |
428 | if (chunk_array[i].size == 0) | |
429 | break; | |
430 | } | |
431 | kfree(chunk_array); | |
432 | filp->private_data = buf; | |
58ea91c0 | 433 | return nonseekable_open(inode, filp); |
12e0c95e FM |
434 | } |
435 | ||
436 | static int zcore_memmap_release(struct inode *inode, struct file *filp) | |
437 | { | |
438 | kfree(filp->private_data); | |
439 | return 0; | |
440 | } | |
441 | ||
442 | static const struct file_operations zcore_memmap_fops = { | |
443 | .owner = THIS_MODULE, | |
444 | .read = zcore_memmap_read, | |
445 | .open = zcore_memmap_open, | |
446 | .release = zcore_memmap_release, | |
6038f373 | 447 | .llseek = no_llseek, |
12e0c95e FM |
448 | }; |
449 | ||
099b7651 FM |
450 | static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf, |
451 | size_t count, loff_t *ppos) | |
452 | { | |
453 | if (ipl_block) { | |
454 | diag308(DIAG308_SET, ipl_block); | |
455 | diag308(DIAG308_IPL, NULL); | |
456 | } | |
457 | return count; | |
458 | } | |
459 | ||
460 | static int zcore_reipl_open(struct inode *inode, struct file *filp) | |
461 | { | |
58ea91c0 | 462 | return nonseekable_open(inode, filp); |
099b7651 FM |
463 | } |
464 | ||
465 | static int zcore_reipl_release(struct inode *inode, struct file *filp) | |
466 | { | |
467 | return 0; | |
468 | } | |
469 | ||
470 | static const struct file_operations zcore_reipl_fops = { | |
471 | .owner = THIS_MODULE, | |
472 | .write = zcore_reipl_write, | |
473 | .open = zcore_reipl_open, | |
474 | .release = zcore_reipl_release, | |
6038f373 | 475 | .llseek = no_llseek, |
099b7651 FM |
476 | }; |
477 | ||
f64ca217 | 478 | #ifdef CONFIG_32BIT |
411ed322 | 479 | |
f64ca217 | 480 | static void __init set_lc_mask(struct save_area *map) |
411ed322 | 481 | { |
f64ca217 HC |
482 | memset(&map->ext_save, 0xff, sizeof(map->ext_save)); |
483 | memset(&map->timer, 0xff, sizeof(map->timer)); | |
484 | memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp)); | |
485 | memset(&map->psw, 0xff, sizeof(map->psw)); | |
486 | memset(&map->pref_reg, 0xff, sizeof(map->pref_reg)); | |
487 | memset(&map->acc_regs, 0xff, sizeof(map->acc_regs)); | |
488 | memset(&map->fp_regs, 0xff, sizeof(map->fp_regs)); | |
489 | memset(&map->gp_regs, 0xff, sizeof(map->gp_regs)); | |
490 | memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs)); | |
411ed322 MH |
491 | } |
492 | ||
f64ca217 HC |
493 | #else /* CONFIG_32BIT */ |
494 | ||
495 | static void __init set_lc_mask(struct save_area *map) | |
411ed322 | 496 | { |
f64ca217 HC |
497 | memset(&map->fp_regs, 0xff, sizeof(map->fp_regs)); |
498 | memset(&map->gp_regs, 0xff, sizeof(map->gp_regs)); | |
499 | memset(&map->psw, 0xff, sizeof(map->psw)); | |
500 | memset(&map->pref_reg, 0xff, sizeof(map->pref_reg)); | |
501 | memset(&map->fp_ctrl_reg, 0xff, sizeof(map->fp_ctrl_reg)); | |
502 | memset(&map->tod_reg, 0xff, sizeof(map->tod_reg)); | |
503 | memset(&map->timer, 0xff, sizeof(map->timer)); | |
504 | memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp)); | |
505 | memset(&map->acc_regs, 0xff, sizeof(map->acc_regs)); | |
506 | memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs)); | |
411ed322 MH |
507 | } |
508 | ||
f64ca217 HC |
509 | #endif /* CONFIG_32BIT */ |
510 | ||
411ed322 MH |
511 | /* |
512 | * Initialize dump globals for a given architecture | |
513 | */ | |
514 | static int __init sys_info_init(enum arch_id arch) | |
515 | { | |
2a062ab4 MH |
516 | int rc; |
517 | ||
411ed322 MH |
518 | switch (arch) { |
519 | case ARCH_S390X: | |
17159dc6 | 520 | pr_alert("DETECTED 'S390X (64 bit) OS'\n"); |
411ed322 MH |
521 | break; |
522 | case ARCH_S390: | |
17159dc6 | 523 | pr_alert("DETECTED 'S390 (32 bit) OS'\n"); |
411ed322 MH |
524 | break; |
525 | default: | |
17159dc6 | 526 | pr_alert("0x%x is an unknown architecture.\n",arch); |
411ed322 MH |
527 | return -EINVAL; |
528 | } | |
f64ca217 HC |
529 | sys_info.sa_base = SAVE_AREA_BASE; |
530 | sys_info.sa_size = sizeof(struct save_area); | |
411ed322 | 531 | sys_info.arch = arch; |
f64ca217 | 532 | set_lc_mask(&sys_info.lc_mask); |
2a062ab4 MH |
533 | rc = init_cpu_info(arch); |
534 | if (rc) | |
535 | return rc; | |
411ed322 MH |
536 | sys_info.mem_size = real_memory_size; |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
541 | static int __init check_sdias(void) | |
542 | { | |
543 | int rc, act_hsa_size; | |
544 | ||
545 | rc = sclp_sdias_blk_count(); | |
546 | if (rc < 0) { | |
2a062ab4 | 547 | TRACE("Could not determine HSA size\n"); |
411ed322 MH |
548 | return rc; |
549 | } | |
550 | act_hsa_size = (rc - 1) * PAGE_SIZE; | |
551 | if (act_hsa_size < ZFCPDUMP_HSA_SIZE) { | |
2a062ab4 | 552 | TRACE("HSA size too small: %i\n", act_hsa_size); |
411ed322 MH |
553 | return -EINVAL; |
554 | } | |
555 | return 0; | |
556 | } | |
557 | ||
12e0c95e FM |
558 | static int __init get_mem_size(unsigned long *mem) |
559 | { | |
560 | int i; | |
561 | struct mem_chunk *chunk_array; | |
562 | ||
563 | chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk), | |
564 | GFP_KERNEL); | |
565 | if (!chunk_array) | |
566 | return -ENOMEM; | |
567 | detect_memory_layout(chunk_array); | |
568 | for (i = 0; i < MEMORY_CHUNKS; i++) { | |
569 | if (chunk_array[i].size == 0) | |
570 | break; | |
571 | *mem += chunk_array[i].size; | |
572 | } | |
573 | kfree(chunk_array); | |
574 | return 0; | |
575 | } | |
576 | ||
577 | static int __init zcore_header_init(int arch, struct zcore_header *hdr) | |
411ed322 | 578 | { |
0cbde8ee | 579 | int rc, i; |
12e0c95e | 580 | unsigned long memory = 0; |
0cbde8ee | 581 | u32 prefix; |
12e0c95e | 582 | |
411ed322 MH |
583 | if (arch == ARCH_S390X) |
584 | hdr->arch_id = DUMP_ARCH_S390X; | |
585 | else | |
586 | hdr->arch_id = DUMP_ARCH_S390; | |
12e0c95e FM |
587 | rc = get_mem_size(&memory); |
588 | if (rc) | |
589 | return rc; | |
590 | hdr->mem_size = memory; | |
591 | hdr->rmem_size = memory; | |
411ed322 | 592 | hdr->mem_end = sys_info.mem_size; |
12e0c95e | 593 | hdr->num_pages = memory / PAGE_SIZE; |
411ed322 MH |
594 | hdr->tod = get_clock(); |
595 | get_cpu_id(&hdr->cpu_id); | |
0cbde8ee MH |
596 | for (i = 0; zfcpdump_save_areas[i]; i++) { |
597 | prefix = zfcpdump_save_areas[i]->pref_reg; | |
598 | hdr->real_cpu_cnt++; | |
599 | if (!prefix) | |
600 | continue; | |
601 | hdr->lc_vec[hdr->cpu_cnt] = prefix; | |
602 | hdr->cpu_cnt++; | |
603 | } | |
12e0c95e | 604 | return 0; |
411ed322 MH |
605 | } |
606 | ||
099b7651 FM |
607 | /* |
608 | * Provide IPL parameter information block from either HSA or memory | |
609 | * for future reipl | |
610 | */ | |
611 | static int __init zcore_reipl_init(void) | |
612 | { | |
613 | struct ipib_info ipib_info; | |
614 | int rc; | |
615 | ||
616 | rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info)); | |
617 | if (rc) | |
618 | return rc; | |
619 | if (ipib_info.ipib == 0) | |
620 | return 0; | |
621 | ipl_block = (void *) __get_free_page(GFP_KERNEL); | |
622 | if (!ipl_block) | |
623 | return -ENOMEM; | |
624 | if (ipib_info.ipib < ZFCPDUMP_HSA_SIZE) | |
625 | rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE); | |
626 | else | |
92fe3132 | 627 | rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE); |
76ef964c | 628 | if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) != |
159d1ff8 | 629 | ipib_info.checksum) { |
099b7651 FM |
630 | TRACE("Checksum does not match\n"); |
631 | free_page((unsigned long) ipl_block); | |
632 | ipl_block = NULL; | |
633 | } | |
634 | return 0; | |
635 | } | |
636 | ||
411ed322 MH |
637 | static int __init zcore_init(void) |
638 | { | |
639 | unsigned char arch; | |
640 | int rc; | |
641 | ||
642 | if (ipl_info.type != IPL_TYPE_FCP_DUMP) | |
643 | return -ENODATA; | |
3f25dc4f MH |
644 | if (OLDMEM_BASE) |
645 | return -ENODATA; | |
411ed322 MH |
646 | |
647 | zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long)); | |
648 | debug_register_view(zcore_dbf, &debug_sprintf_view); | |
649 | debug_set_level(zcore_dbf, 6); | |
650 | ||
651 | TRACE("devno: %x\n", ipl_info.data.fcp.dev_id.devno); | |
652 | TRACE("wwpn: %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn); | |
653 | TRACE("lun: %llx\n", (unsigned long long) ipl_info.data.fcp.lun); | |
654 | ||
763968e2 | 655 | rc = sclp_sdias_init(); |
411ed322 MH |
656 | if (rc) |
657 | goto fail; | |
658 | ||
659 | rc = check_sdias(); | |
2a062ab4 | 660 | if (rc) |
411ed322 | 661 | goto fail; |
411ed322 MH |
662 | |
663 | rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1); | |
2a062ab4 | 664 | if (rc) |
411ed322 | 665 | goto fail; |
411ed322 | 666 | |
f64ca217 HC |
667 | #ifdef CONFIG_64BIT |
668 | if (arch == ARCH_S390) { | |
669 | pr_alert("The 64-bit dump tool cannot be used for a " | |
670 | "32-bit system\n"); | |
671 | rc = -EINVAL; | |
672 | goto fail; | |
673 | } | |
674 | #else /* CONFIG_64BIT */ | |
411ed322 | 675 | if (arch == ARCH_S390X) { |
17159dc6 MH |
676 | pr_alert("The 32-bit dump tool cannot be used for a " |
677 | "64-bit system\n"); | |
411ed322 MH |
678 | rc = -EINVAL; |
679 | goto fail; | |
680 | } | |
f64ca217 | 681 | #endif /* CONFIG_64BIT */ |
411ed322 MH |
682 | |
683 | rc = sys_info_init(arch); | |
2a062ab4 | 684 | if (rc) |
411ed322 | 685 | goto fail; |
411ed322 | 686 | |
12e0c95e FM |
687 | rc = zcore_header_init(arch, &zcore_header); |
688 | if (rc) | |
689 | goto fail; | |
411ed322 | 690 | |
099b7651 FM |
691 | rc = zcore_reipl_init(); |
692 | if (rc) | |
693 | goto fail; | |
694 | ||
411ed322 MH |
695 | zcore_dir = debugfs_create_dir("zcore" , NULL); |
696 | if (!zcore_dir) { | |
697 | rc = -ENOMEM; | |
698 | goto fail; | |
699 | } | |
700 | zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL, | |
701 | &zcore_fops); | |
702 | if (!zcore_file) { | |
411ed322 | 703 | rc = -ENOMEM; |
12e0c95e FM |
704 | goto fail_dir; |
705 | } | |
706 | zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir, | |
707 | NULL, &zcore_memmap_fops); | |
708 | if (!zcore_memmap_file) { | |
709 | rc = -ENOMEM; | |
710 | goto fail_file; | |
411ed322 | 711 | } |
099b7651 FM |
712 | zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir, |
713 | NULL, &zcore_reipl_fops); | |
714 | if (!zcore_reipl_file) { | |
715 | rc = -ENOMEM; | |
716 | goto fail_memmap_file; | |
717 | } | |
411ed322 MH |
718 | hsa_available = 1; |
719 | return 0; | |
720 | ||
099b7651 FM |
721 | fail_memmap_file: |
722 | debugfs_remove(zcore_memmap_file); | |
12e0c95e FM |
723 | fail_file: |
724 | debugfs_remove(zcore_file); | |
725 | fail_dir: | |
726 | debugfs_remove(zcore_dir); | |
411ed322 MH |
727 | fail: |
728 | diag308(DIAG308_REL_HSA, NULL); | |
729 | return rc; | |
730 | } | |
731 | ||
411ed322 MH |
732 | static void __exit zcore_exit(void) |
733 | { | |
734 | debug_unregister(zcore_dbf); | |
763968e2 | 735 | sclp_sdias_exit(); |
099b7651 FM |
736 | free_page((unsigned long) ipl_block); |
737 | debugfs_remove(zcore_reipl_file); | |
738 | debugfs_remove(zcore_memmap_file); | |
739 | debugfs_remove(zcore_file); | |
740 | debugfs_remove(zcore_dir); | |
411ed322 MH |
741 | diag308(DIAG308_REL_HSA, NULL); |
742 | } | |
743 | ||
099b7651 | 744 | MODULE_AUTHOR("Copyright IBM Corp. 2003,2008"); |
411ed322 MH |
745 | MODULE_DESCRIPTION("zcore module for zfcpdump support"); |
746 | MODULE_LICENSE("GPL"); | |
747 | ||
748 | subsys_initcall(zcore_init); | |
749 | module_exit(zcore_exit); |