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 | * | |
a53c8fab | 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> |
50be6345 PH |
20 | #include <linux/memblock.h> |
21 | ||
cbb870c8 | 22 | #include <asm/asm-offsets.h> |
411ed322 MH |
23 | #include <asm/ipl.h> |
24 | #include <asm/sclp.h> | |
25 | #include <asm/setup.h> | |
411ed322 MH |
26 | #include <asm/uaccess.h> |
27 | #include <asm/debug.h> | |
28 | #include <asm/processor.h> | |
29 | #include <asm/irqflags.h> | |
159d1ff8 | 30 | #include <asm/checksum.h> |
a62bc073 | 31 | #include <asm/switch_to.h> |
763968e2 | 32 | #include "sclp.h" |
411ed322 MH |
33 | |
34 | #define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x) | |
411ed322 | 35 | |
6f79d332 MH |
36 | #define TO_USER 1 |
37 | #define TO_KERNEL 0 | |
12e0c95e | 38 | #define CHUNK_INFO_SIZE 34 /* 2 16-byte char, each followed by blank */ |
411ed322 MH |
39 | |
40 | enum arch_id { | |
41 | ARCH_S390 = 0, | |
42 | ARCH_S390X = 1, | |
43 | }; | |
44 | ||
45 | /* dump system info */ | |
46 | ||
47 | struct sys_info { | |
f64ca217 HC |
48 | enum arch_id arch; |
49 | unsigned long sa_base; | |
50 | u32 sa_size; | |
51 | int cpu_map[NR_CPUS]; | |
52 | unsigned long mem_size; | |
53 | struct save_area lc_mask; | |
411ed322 MH |
54 | }; |
55 | ||
099b7651 FM |
56 | struct ipib_info { |
57 | unsigned long ipib; | |
58 | u32 checksum; | |
59 | } __attribute__((packed)); | |
60 | ||
411ed322 MH |
61 | static struct sys_info sys_info; |
62 | static struct debug_info *zcore_dbf; | |
63 | static int hsa_available; | |
64 | static struct dentry *zcore_dir; | |
65 | static struct dentry *zcore_file; | |
12e0c95e | 66 | static struct dentry *zcore_memmap_file; |
099b7651 | 67 | static struct dentry *zcore_reipl_file; |
b4b3d128 | 68 | static struct dentry *zcore_hsa_file; |
099b7651 | 69 | static struct ipl_parameter_block *ipl_block; |
411ed322 MH |
70 | |
71 | /* | |
72 | * Copy memory from HSA to kernel or user memory (not reentrant): | |
73 | * | |
74 | * @dest: Kernel or user buffer where memory should be copied to | |
75 | * @src: Start address within HSA where data should be copied | |
76 | * @count: Size of buffer, which should be copied | |
77 | * @mode: Either TO_KERNEL or TO_USER | |
78 | */ | |
6f79d332 | 79 | int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode) |
411ed322 MH |
80 | { |
81 | int offs, blk_num; | |
82 | static char buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); | |
83 | ||
b4b3d128 MH |
84 | if (!hsa_available) |
85 | return -ENODATA; | |
411ed322 MH |
86 | if (count == 0) |
87 | return 0; | |
88 | ||
89 | /* copy first block */ | |
90 | offs = 0; | |
91 | if ((src % PAGE_SIZE) != 0) { | |
92 | blk_num = src / PAGE_SIZE + 2; | |
93 | if (sclp_sdias_copy(buf, blk_num, 1)) { | |
94 | TRACE("sclp_sdias_copy() failed\n"); | |
95 | return -EIO; | |
96 | } | |
97 | offs = min((PAGE_SIZE - (src % PAGE_SIZE)), count); | |
98 | if (mode == TO_USER) { | |
99 | if (copy_to_user((__force __user void*) dest, | |
100 | buf + (src % PAGE_SIZE), offs)) | |
101 | return -EFAULT; | |
102 | } else | |
103 | memcpy(dest, buf + (src % PAGE_SIZE), offs); | |
104 | } | |
105 | if (offs == count) | |
106 | goto out; | |
107 | ||
108 | /* copy middle */ | |
109 | for (; (offs + PAGE_SIZE) <= count; offs += PAGE_SIZE) { | |
110 | blk_num = (src + offs) / PAGE_SIZE + 2; | |
111 | if (sclp_sdias_copy(buf, blk_num, 1)) { | |
112 | TRACE("sclp_sdias_copy() failed\n"); | |
113 | return -EIO; | |
114 | } | |
115 | if (mode == TO_USER) { | |
116 | if (copy_to_user((__force __user void*) dest + offs, | |
117 | buf, PAGE_SIZE)) | |
118 | return -EFAULT; | |
119 | } else | |
120 | memcpy(dest + offs, buf, PAGE_SIZE); | |
121 | } | |
122 | if (offs == count) | |
123 | goto out; | |
124 | ||
125 | /* copy last block */ | |
126 | blk_num = (src + offs) / PAGE_SIZE + 2; | |
127 | if (sclp_sdias_copy(buf, blk_num, 1)) { | |
128 | TRACE("sclp_sdias_copy() failed\n"); | |
129 | return -EIO; | |
130 | } | |
131 | if (mode == TO_USER) { | |
132 | if (copy_to_user((__force __user void*) dest + offs, buf, | |
241fd9bc | 133 | count - offs)) |
411ed322 MH |
134 | return -EFAULT; |
135 | } else | |
136 | memcpy(dest + offs, buf, count - offs); | |
137 | out: | |
138 | return 0; | |
139 | } | |
140 | ||
141 | static int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count) | |
142 | { | |
143 | return memcpy_hsa((void __force *) dest, src, count, TO_USER); | |
144 | } | |
145 | ||
146 | static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count) | |
147 | { | |
148 | return memcpy_hsa(dest, src, count, TO_KERNEL); | |
149 | } | |
150 | ||
411ed322 MH |
151 | static int __init init_cpu_info(enum arch_id arch) |
152 | { | |
a62bc073 | 153 | struct save_area_ext *sa_ext; |
411ed322 MH |
154 | |
155 | /* get info for boot cpu from lowcore, stored in the HSA */ | |
156 | ||
1592a8e4 | 157 | sa_ext = dump_save_areas.areas[0]; |
a62bc073 | 158 | if (!sa_ext) |
411ed322 | 159 | return -ENOMEM; |
a62bc073 MH |
160 | if (memcpy_hsa_kernel(&sa_ext->sa, sys_info.sa_base, |
161 | sys_info.sa_size) < 0) { | |
2a062ab4 | 162 | TRACE("could not copy from HSA\n"); |
a62bc073 | 163 | kfree(sa_ext); |
411ed322 MH |
164 | return -EIO; |
165 | } | |
a62bc073 MH |
166 | if (MACHINE_HAS_VX) |
167 | save_vx_regs_safe(sa_ext->vx_regs); | |
411ed322 MH |
168 | return 0; |
169 | } | |
170 | ||
171 | static DEFINE_MUTEX(zcore_mutex); | |
172 | ||
0cbde8ee | 173 | #define DUMP_VERSION 0x5 |
411ed322 MH |
174 | #define DUMP_MAGIC 0xa8190173618f23fdULL |
175 | #define DUMP_ARCH_S390X 2 | |
176 | #define DUMP_ARCH_S390 1 | |
177 | #define HEADER_SIZE 4096 | |
178 | ||
179 | /* dump header dumped according to s390 crash dump format */ | |
180 | ||
181 | struct zcore_header { | |
182 | u64 magic; | |
183 | u32 version; | |
184 | u32 header_size; | |
185 | u32 dump_level; | |
186 | u32 page_size; | |
187 | u64 mem_size; | |
188 | u64 mem_start; | |
189 | u64 mem_end; | |
190 | u32 num_pages; | |
191 | u32 pad1; | |
192 | u64 tod; | |
e86a6ed6 | 193 | struct cpuid cpu_id; |
411ed322 | 194 | u32 arch_id; |
ce444823 | 195 | u32 volnr; |
411ed322 | 196 | u32 build_arch; |
ce444823 | 197 | u64 rmem_size; |
0cbde8ee MH |
198 | u8 mvdump; |
199 | u16 cpu_cnt; | |
200 | u16 real_cpu_cnt; | |
201 | u8 end_pad1[0x200-0x061]; | |
202 | u64 mvdump_sign; | |
203 | u64 mvdump_zipl_time; | |
204 | u8 end_pad2[0x800-0x210]; | |
205 | u32 lc_vec[512]; | |
411ed322 MH |
206 | } __attribute__((packed,__aligned__(16))); |
207 | ||
208 | static struct zcore_header zcore_header = { | |
209 | .magic = DUMP_MAGIC, | |
210 | .version = DUMP_VERSION, | |
211 | .header_size = 4096, | |
212 | .dump_level = 0, | |
213 | .page_size = PAGE_SIZE, | |
214 | .mem_start = 0, | |
411ed322 | 215 | .build_arch = DUMP_ARCH_S390X, |
411ed322 MH |
216 | }; |
217 | ||
218 | /* | |
219 | * Copy lowcore info to buffer. Use map in order to copy only register parts. | |
220 | * | |
221 | * @buf: User buffer | |
222 | * @sa: Pointer to save area | |
223 | * @sa_off: Offset in save area to copy | |
224 | * @len: Number of bytes to copy | |
225 | */ | |
226 | static int copy_lc(void __user *buf, void *sa, int sa_off, int len) | |
227 | { | |
228 | int i; | |
229 | char *lc_mask = (char*)&sys_info.lc_mask; | |
230 | ||
231 | for (i = 0; i < len; i++) { | |
232 | if (!lc_mask[i + sa_off]) | |
233 | continue; | |
234 | if (copy_to_user(buf + i, sa + sa_off + i, 1)) | |
235 | return -EFAULT; | |
236 | } | |
237 | return 0; | |
238 | } | |
239 | ||
240 | /* | |
241 | * Copy lowcores info to memory, if necessary | |
242 | * | |
243 | * @buf: User buffer | |
244 | * @addr: Start address of buffer in dump memory | |
245 | * @count: Size of buffer | |
246 | */ | |
247 | static int zcore_add_lc(char __user *buf, unsigned long start, size_t count) | |
248 | { | |
249 | unsigned long end; | |
58952942 | 250 | int i; |
411ed322 MH |
251 | |
252 | if (count == 0) | |
253 | return 0; | |
254 | ||
255 | end = start + count; | |
58952942 | 256 | for (i = 0; i < dump_save_areas.count; i++) { |
411ed322 MH |
257 | unsigned long cp_start, cp_end; /* copy range */ |
258 | unsigned long sa_start, sa_end; /* save area range */ | |
259 | unsigned long prefix; | |
260 | unsigned long sa_off, len, buf_off; | |
a62bc073 | 261 | struct save_area *save_area = &dump_save_areas.areas[i]->sa; |
411ed322 | 262 | |
58952942 | 263 | prefix = save_area->pref_reg; |
411ed322 MH |
264 | sa_start = prefix + sys_info.sa_base; |
265 | sa_end = prefix + sys_info.sa_base + sys_info.sa_size; | |
266 | ||
267 | if ((end < sa_start) || (start > sa_end)) | |
58952942 | 268 | continue; |
411ed322 MH |
269 | cp_start = max(start, sa_start); |
270 | cp_end = min(end, sa_end); | |
271 | ||
272 | buf_off = cp_start - start; | |
273 | sa_off = cp_start - sa_start; | |
274 | len = cp_end - cp_start; | |
275 | ||
276 | TRACE("copy_lc for: %lx\n", start); | |
58952942 | 277 | if (copy_lc(buf + buf_off, save_area, sa_off, len)) |
411ed322 | 278 | return -EFAULT; |
411ed322 MH |
279 | } |
280 | return 0; | |
281 | } | |
282 | ||
b4b3d128 MH |
283 | /* |
284 | * Release the HSA | |
285 | */ | |
286 | static void release_hsa(void) | |
287 | { | |
288 | diag308(DIAG308_REL_HSA, NULL); | |
289 | hsa_available = 0; | |
290 | } | |
291 | ||
411ed322 MH |
292 | /* |
293 | * Read routine for zcore character device | |
294 | * First 4K are dump header | |
295 | * Next 32MB are HSA Memory | |
296 | * Rest is read from absolute Memory | |
297 | */ | |
298 | static ssize_t zcore_read(struct file *file, char __user *buf, size_t count, | |
299 | loff_t *ppos) | |
300 | { | |
301 | unsigned long mem_start; /* Start address in memory */ | |
302 | size_t mem_offs; /* Offset in dump memory */ | |
303 | size_t hdr_count; /* Size of header part of output buffer */ | |
304 | size_t size; | |
305 | int rc; | |
306 | ||
307 | mutex_lock(&zcore_mutex); | |
308 | ||
309 | if (*ppos > (sys_info.mem_size + HEADER_SIZE)) { | |
310 | rc = -EINVAL; | |
311 | goto fail; | |
312 | } | |
313 | ||
314 | count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos)); | |
315 | ||
316 | /* Copy dump header */ | |
317 | if (*ppos < HEADER_SIZE) { | |
318 | size = min(count, (size_t) (HEADER_SIZE - *ppos)); | |
319 | if (copy_to_user(buf, &zcore_header + *ppos, size)) { | |
320 | rc = -EFAULT; | |
321 | goto fail; | |
322 | } | |
323 | hdr_count = size; | |
324 | mem_start = 0; | |
325 | } else { | |
326 | hdr_count = 0; | |
327 | mem_start = *ppos - HEADER_SIZE; | |
328 | } | |
329 | ||
330 | mem_offs = 0; | |
331 | ||
332 | /* Copy from HSA data */ | |
37c5f6c8 | 333 | if (*ppos < sclp.hsa_size + HEADER_SIZE) { |
e657d8fe | 334 | size = min((count - hdr_count), |
37c5f6c8 | 335 | (size_t) (sclp.hsa_size - mem_start)); |
411ed322 MH |
336 | rc = memcpy_hsa_user(buf + hdr_count, mem_start, size); |
337 | if (rc) | |
338 | goto fail; | |
339 | ||
340 | mem_offs += size; | |
341 | } | |
342 | ||
343 | /* Copy from real mem */ | |
344 | size = count - mem_offs - hdr_count; | |
7f0bf656 MH |
345 | rc = copy_to_user_real(buf + hdr_count + mem_offs, |
346 | (void *) mem_start + mem_offs, size); | |
411ed322 MH |
347 | if (rc) |
348 | goto fail; | |
349 | ||
350 | /* | |
351 | * Since s390 dump analysis tools like lcrash or crash | |
352 | * expect register sets in the prefix pages of the cpus, | |
353 | * we copy them into the read buffer, if necessary. | |
354 | * buf + hdr_count: Start of memory part of output buffer | |
355 | * mem_start: Start memory address to copy from | |
356 | * count - hdr_count: Size of memory area to copy | |
357 | */ | |
358 | if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) { | |
359 | rc = -EFAULT; | |
360 | goto fail; | |
361 | } | |
362 | *ppos += count; | |
363 | fail: | |
364 | mutex_unlock(&zcore_mutex); | |
365 | return (rc < 0) ? rc : count; | |
366 | } | |
367 | ||
368 | static int zcore_open(struct inode *inode, struct file *filp) | |
369 | { | |
370 | if (!hsa_available) | |
371 | return -ENODATA; | |
372 | else | |
373 | return capable(CAP_SYS_RAWIO) ? 0 : -EPERM; | |
374 | } | |
375 | ||
376 | static int zcore_release(struct inode *inode, struct file *filep) | |
377 | { | |
b4b3d128 MH |
378 | if (hsa_available) |
379 | release_hsa(); | |
411ed322 MH |
380 | return 0; |
381 | } | |
382 | ||
383 | static loff_t zcore_lseek(struct file *file, loff_t offset, int orig) | |
384 | { | |
385 | loff_t rc; | |
386 | ||
387 | mutex_lock(&zcore_mutex); | |
388 | switch (orig) { | |
389 | case 0: | |
390 | file->f_pos = offset; | |
391 | rc = file->f_pos; | |
392 | break; | |
393 | case 1: | |
394 | file->f_pos += offset; | |
395 | rc = file->f_pos; | |
396 | break; | |
397 | default: | |
398 | rc = -EINVAL; | |
399 | } | |
400 | mutex_unlock(&zcore_mutex); | |
401 | return rc; | |
402 | } | |
403 | ||
5c81cdbe | 404 | static const struct file_operations zcore_fops = { |
411ed322 MH |
405 | .owner = THIS_MODULE, |
406 | .llseek = zcore_lseek, | |
407 | .read = zcore_read, | |
408 | .open = zcore_open, | |
409 | .release = zcore_release, | |
410 | }; | |
411 | ||
12e0c95e FM |
412 | static ssize_t zcore_memmap_read(struct file *filp, char __user *buf, |
413 | size_t count, loff_t *ppos) | |
414 | { | |
415 | return simple_read_from_buffer(buf, count, ppos, filp->private_data, | |
50be6345 | 416 | memblock.memory.cnt * CHUNK_INFO_SIZE); |
12e0c95e FM |
417 | } |
418 | ||
419 | static int zcore_memmap_open(struct inode *inode, struct file *filp) | |
420 | { | |
50be6345 | 421 | struct memblock_region *reg; |
12e0c95e | 422 | char *buf; |
50be6345 | 423 | int i = 0; |
12e0c95e | 424 | |
50be6345 | 425 | buf = kzalloc(memblock.memory.cnt * CHUNK_INFO_SIZE, GFP_KERNEL); |
12e0c95e | 426 | if (!buf) { |
12e0c95e FM |
427 | return -ENOMEM; |
428 | } | |
50be6345 PH |
429 | for_each_memblock(memory, reg) { |
430 | sprintf(buf + (i++ * CHUNK_INFO_SIZE), "%016llx %016llx ", | |
431 | (unsigned long long) reg->base, | |
432 | (unsigned long long) reg->size); | |
12e0c95e | 433 | } |
12e0c95e | 434 | filp->private_data = buf; |
58ea91c0 | 435 | return nonseekable_open(inode, filp); |
12e0c95e FM |
436 | } |
437 | ||
438 | static int zcore_memmap_release(struct inode *inode, struct file *filp) | |
439 | { | |
440 | kfree(filp->private_data); | |
441 | return 0; | |
442 | } | |
443 | ||
444 | static const struct file_operations zcore_memmap_fops = { | |
445 | .owner = THIS_MODULE, | |
446 | .read = zcore_memmap_read, | |
447 | .open = zcore_memmap_open, | |
448 | .release = zcore_memmap_release, | |
6038f373 | 449 | .llseek = no_llseek, |
12e0c95e FM |
450 | }; |
451 | ||
099b7651 FM |
452 | static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf, |
453 | size_t count, loff_t *ppos) | |
454 | { | |
455 | if (ipl_block) { | |
456 | diag308(DIAG308_SET, ipl_block); | |
457 | diag308(DIAG308_IPL, NULL); | |
458 | } | |
459 | return count; | |
460 | } | |
461 | ||
462 | static int zcore_reipl_open(struct inode *inode, struct file *filp) | |
463 | { | |
58ea91c0 | 464 | return nonseekable_open(inode, filp); |
099b7651 FM |
465 | } |
466 | ||
467 | static int zcore_reipl_release(struct inode *inode, struct file *filp) | |
468 | { | |
469 | return 0; | |
470 | } | |
471 | ||
472 | static const struct file_operations zcore_reipl_fops = { | |
473 | .owner = THIS_MODULE, | |
474 | .write = zcore_reipl_write, | |
475 | .open = zcore_reipl_open, | |
476 | .release = zcore_reipl_release, | |
6038f373 | 477 | .llseek = no_llseek, |
099b7651 FM |
478 | }; |
479 | ||
b4b3d128 MH |
480 | static ssize_t zcore_hsa_read(struct file *filp, char __user *buf, |
481 | size_t count, loff_t *ppos) | |
482 | { | |
483 | static char str[18]; | |
484 | ||
485 | if (hsa_available) | |
37c5f6c8 | 486 | snprintf(str, sizeof(str), "%lx\n", sclp.hsa_size); |
b4b3d128 MH |
487 | else |
488 | snprintf(str, sizeof(str), "0\n"); | |
489 | return simple_read_from_buffer(buf, count, ppos, str, strlen(str)); | |
490 | } | |
491 | ||
492 | static ssize_t zcore_hsa_write(struct file *filp, const char __user *buf, | |
493 | size_t count, loff_t *ppos) | |
494 | { | |
495 | char value; | |
496 | ||
497 | if (*ppos != 0) | |
498 | return -EPIPE; | |
499 | if (copy_from_user(&value, buf, 1)) | |
500 | return -EFAULT; | |
501 | if (value != '0') | |
502 | return -EINVAL; | |
503 | release_hsa(); | |
504 | return count; | |
505 | } | |
506 | ||
507 | static const struct file_operations zcore_hsa_fops = { | |
508 | .owner = THIS_MODULE, | |
509 | .write = zcore_hsa_write, | |
510 | .read = zcore_hsa_read, | |
511 | .open = nonseekable_open, | |
512 | .llseek = no_llseek, | |
513 | }; | |
514 | ||
f64ca217 | 515 | static void __init set_lc_mask(struct save_area *map) |
411ed322 | 516 | { |
f64ca217 HC |
517 | memset(&map->fp_regs, 0xff, sizeof(map->fp_regs)); |
518 | memset(&map->gp_regs, 0xff, sizeof(map->gp_regs)); | |
519 | memset(&map->psw, 0xff, sizeof(map->psw)); | |
520 | memset(&map->pref_reg, 0xff, sizeof(map->pref_reg)); | |
521 | memset(&map->fp_ctrl_reg, 0xff, sizeof(map->fp_ctrl_reg)); | |
522 | memset(&map->tod_reg, 0xff, sizeof(map->tod_reg)); | |
523 | memset(&map->timer, 0xff, sizeof(map->timer)); | |
524 | memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp)); | |
525 | memset(&map->acc_regs, 0xff, sizeof(map->acc_regs)); | |
526 | memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs)); | |
411ed322 MH |
527 | } |
528 | ||
529 | /* | |
530 | * Initialize dump globals for a given architecture | |
531 | */ | |
7b1e427d | 532 | static int __init sys_info_init(enum arch_id arch, unsigned long mem_end) |
411ed322 | 533 | { |
2a062ab4 MH |
534 | int rc; |
535 | ||
411ed322 MH |
536 | switch (arch) { |
537 | case ARCH_S390X: | |
17159dc6 | 538 | pr_alert("DETECTED 'S390X (64 bit) OS'\n"); |
411ed322 MH |
539 | break; |
540 | case ARCH_S390: | |
17159dc6 | 541 | pr_alert("DETECTED 'S390 (32 bit) OS'\n"); |
411ed322 MH |
542 | break; |
543 | default: | |
17159dc6 | 544 | pr_alert("0x%x is an unknown architecture.\n",arch); |
411ed322 MH |
545 | return -EINVAL; |
546 | } | |
f64ca217 HC |
547 | sys_info.sa_base = SAVE_AREA_BASE; |
548 | sys_info.sa_size = sizeof(struct save_area); | |
411ed322 | 549 | sys_info.arch = arch; |
f64ca217 | 550 | set_lc_mask(&sys_info.lc_mask); |
2a062ab4 MH |
551 | rc = init_cpu_info(arch); |
552 | if (rc) | |
553 | return rc; | |
7b1e427d | 554 | sys_info.mem_size = mem_end; |
411ed322 MH |
555 | |
556 | return 0; | |
557 | } | |
558 | ||
559 | static int __init check_sdias(void) | |
560 | { | |
37c5f6c8 | 561 | if (!sclp.hsa_size) { |
2a062ab4 | 562 | TRACE("Could not determine HSA size\n"); |
e657d8fe | 563 | return -ENODEV; |
411ed322 MH |
564 | } |
565 | return 0; | |
566 | } | |
567 | ||
7b1e427d | 568 | static int __init get_mem_info(unsigned long *mem, unsigned long *end) |
12e0c95e | 569 | { |
50be6345 | 570 | struct memblock_region *reg; |
12e0c95e | 571 | |
50be6345 PH |
572 | for_each_memblock(memory, reg) { |
573 | *mem += reg->size; | |
574 | *end = max_t(unsigned long, *end, reg->base + reg->size); | |
12e0c95e | 575 | } |
12e0c95e FM |
576 | return 0; |
577 | } | |
578 | ||
7b1e427d HC |
579 | static void __init zcore_header_init(int arch, struct zcore_header *hdr, |
580 | unsigned long mem_size) | |
411ed322 | 581 | { |
0cbde8ee | 582 | u32 prefix; |
7b1e427d | 583 | int i; |
12e0c95e | 584 | |
411ed322 MH |
585 | if (arch == ARCH_S390X) |
586 | hdr->arch_id = DUMP_ARCH_S390X; | |
587 | else | |
588 | hdr->arch_id = DUMP_ARCH_S390; | |
7b1e427d HC |
589 | hdr->mem_size = mem_size; |
590 | hdr->rmem_size = mem_size; | |
411ed322 | 591 | hdr->mem_end = sys_info.mem_size; |
7b1e427d | 592 | hdr->num_pages = mem_size / PAGE_SIZE; |
1aae0560 | 593 | hdr->tod = get_tod_clock(); |
411ed322 | 594 | get_cpu_id(&hdr->cpu_id); |
58952942 | 595 | for (i = 0; i < dump_save_areas.count; i++) { |
a62bc073 | 596 | prefix = dump_save_areas.areas[i]->sa.pref_reg; |
0cbde8ee MH |
597 | hdr->real_cpu_cnt++; |
598 | if (!prefix) | |
599 | continue; | |
600 | hdr->lc_vec[hdr->cpu_cnt] = prefix; | |
601 | hdr->cpu_cnt++; | |
602 | } | |
411ed322 MH |
603 | } |
604 | ||
099b7651 FM |
605 | /* |
606 | * Provide IPL parameter information block from either HSA or memory | |
607 | * for future reipl | |
608 | */ | |
609 | static int __init zcore_reipl_init(void) | |
610 | { | |
611 | struct ipib_info ipib_info; | |
612 | int rc; | |
613 | ||
614 | rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info)); | |
615 | if (rc) | |
616 | return rc; | |
617 | if (ipib_info.ipib == 0) | |
618 | return 0; | |
619 | ipl_block = (void *) __get_free_page(GFP_KERNEL); | |
620 | if (!ipl_block) | |
621 | return -ENOMEM; | |
37c5f6c8 | 622 | if (ipib_info.ipib < sclp.hsa_size) |
099b7651 FM |
623 | rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE); |
624 | else | |
92fe3132 | 625 | rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE); |
76ef964c | 626 | if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) != |
159d1ff8 | 627 | ipib_info.checksum) { |
099b7651 FM |
628 | TRACE("Checksum does not match\n"); |
629 | free_page((unsigned long) ipl_block); | |
630 | ipl_block = NULL; | |
631 | } | |
632 | return 0; | |
633 | } | |
634 | ||
411ed322 MH |
635 | static int __init zcore_init(void) |
636 | { | |
7b1e427d | 637 | unsigned long mem_size, mem_end; |
411ed322 MH |
638 | unsigned char arch; |
639 | int rc; | |
640 | ||
7b1e427d | 641 | mem_size = mem_end = 0; |
411ed322 MH |
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; |
b4b3d128 | 662 | hsa_available = 1; |
411ed322 MH |
663 | |
664 | rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1); | |
2a062ab4 | 665 | if (rc) |
411ed322 | 666 | goto fail; |
411ed322 | 667 | |
f64ca217 HC |
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 | } | |
411ed322 | 674 | |
7b1e427d | 675 | rc = get_mem_info(&mem_size, &mem_end); |
2a062ab4 | 676 | if (rc) |
411ed322 | 677 | goto fail; |
411ed322 | 678 | |
7b1e427d | 679 | rc = sys_info_init(arch, mem_end); |
12e0c95e FM |
680 | if (rc) |
681 | goto fail; | |
7b1e427d | 682 | zcore_header_init(arch, &zcore_header, mem_size); |
411ed322 | 683 | |
099b7651 FM |
684 | rc = zcore_reipl_init(); |
685 | if (rc) | |
686 | goto fail; | |
687 | ||
411ed322 MH |
688 | zcore_dir = debugfs_create_dir("zcore" , NULL); |
689 | if (!zcore_dir) { | |
690 | rc = -ENOMEM; | |
691 | goto fail; | |
692 | } | |
693 | zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL, | |
694 | &zcore_fops); | |
695 | if (!zcore_file) { | |
411ed322 | 696 | rc = -ENOMEM; |
12e0c95e FM |
697 | goto fail_dir; |
698 | } | |
699 | zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir, | |
700 | NULL, &zcore_memmap_fops); | |
701 | if (!zcore_memmap_file) { | |
702 | rc = -ENOMEM; | |
703 | goto fail_file; | |
411ed322 | 704 | } |
099b7651 FM |
705 | zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir, |
706 | NULL, &zcore_reipl_fops); | |
707 | if (!zcore_reipl_file) { | |
708 | rc = -ENOMEM; | |
709 | goto fail_memmap_file; | |
710 | } | |
b4b3d128 MH |
711 | zcore_hsa_file = debugfs_create_file("hsa", S_IRUSR|S_IWUSR, zcore_dir, |
712 | NULL, &zcore_hsa_fops); | |
713 | if (!zcore_hsa_file) { | |
714 | rc = -ENOMEM; | |
715 | goto fail_reipl_file; | |
716 | } | |
411ed322 MH |
717 | return 0; |
718 | ||
b4b3d128 MH |
719 | fail_reipl_file: |
720 | debugfs_remove(zcore_reipl_file); | |
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 | 736 | free_page((unsigned long) ipl_block); |
b4b3d128 | 737 | debugfs_remove(zcore_hsa_file); |
099b7651 FM |
738 | debugfs_remove(zcore_reipl_file); |
739 | debugfs_remove(zcore_memmap_file); | |
740 | debugfs_remove(zcore_file); | |
741 | debugfs_remove(zcore_dir); | |
411ed322 MH |
742 | diag308(DIAG308_REL_HSA, NULL); |
743 | } | |
744 | ||
099b7651 | 745 | MODULE_AUTHOR("Copyright IBM Corp. 2003,2008"); |
411ed322 MH |
746 | MODULE_DESCRIPTION("zcore module for zfcpdump support"); |
747 | MODULE_LICENSE("GPL"); | |
748 | ||
749 | subsys_initcall(zcore_init); | |
750 | module_exit(zcore_exit); |