Commit | Line | Data |
---|---|---|
24bbb1fa | 1 | /* |
24bbb1fa MH |
2 | * Hypervisor filesystem for Linux on s390. Diag 204 and 224 |
3 | * implementation. | |
4 | * | |
f55495ba | 5 | * Copyright IBM Corp. 2006, 2008 |
24bbb1fa MH |
6 | * Author(s): Michael Holzheu <holzheu@de.ibm.com> |
7 | */ | |
8 | ||
f55495ba MH |
9 | #define KMSG_COMPONENT "hypfs" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
24bbb1fa MH |
12 | #include <linux/types.h> |
13 | #include <linux/errno.h> | |
33b26d79 | 14 | #include <linux/slab.h> |
24bbb1fa MH |
15 | #include <linux/string.h> |
16 | #include <linux/vmalloc.h> | |
57b28f66 | 17 | #include <linux/mm.h> |
24bbb1fa MH |
18 | #include <asm/ebcdic.h> |
19 | #include "hypfs.h" | |
20 | ||
21 | #define LPAR_NAME_LEN 8 /* lpar name len in diag 204 data */ | |
22 | #define CPU_NAME_LEN 16 /* type name len of cpus in diag224 name table */ | |
23 | #define TMP_SIZE 64 /* size of temporary buffers */ | |
24 | ||
57b28f66 MH |
25 | #define DBFS_D204_HDR_VERSION 0 |
26 | ||
24bbb1fa MH |
27 | /* diag 204 subcodes */ |
28 | enum diag204_sc { | |
29 | SUBC_STIB4 = 4, | |
30 | SUBC_RSI = 5, | |
31 | SUBC_STIB6 = 6, | |
32 | SUBC_STIB7 = 7 | |
33 | }; | |
34 | ||
35 | /* The two available diag 204 data formats */ | |
36 | enum diag204_format { | |
37 | INFO_SIMPLE = 0, | |
38 | INFO_EXT = 0x00010000 | |
39 | }; | |
40 | ||
41 | /* bit is set in flags, when physical cpu info is included in diag 204 data */ | |
42 | #define LPAR_PHYS_FLG 0x80 | |
43 | ||
44 | static char *diag224_cpu_names; /* diag 224 name table */ | |
45 | static enum diag204_sc diag204_store_sc; /* used subcode for store */ | |
46 | static enum diag204_format diag204_info_type; /* used diag 204 data format */ | |
47 | ||
48 | static void *diag204_buf; /* 4K aligned buffer for diag204 data */ | |
49 | static void *diag204_buf_vmalloc; /* vmalloc pointer for diag204 data */ | |
50 | static int diag204_buf_pages; /* number of pages for diag204 data */ | |
51 | ||
57b28f66 MH |
52 | static struct dentry *dbfs_d204_file; |
53 | ||
24bbb1fa MH |
54 | /* |
55 | * DIAG 204 data structures and member access functions. | |
56 | * | |
57 | * Since we have two different diag 204 data formats for old and new s390 | |
58 | * machines, we do not access the structs directly, but use getter functions for | |
59 | * each struct member instead. This should make the code more readable. | |
60 | */ | |
61 | ||
62 | /* Time information block */ | |
63 | ||
64 | struct info_blk_hdr { | |
65 | __u8 npar; | |
66 | __u8 flags; | |
67 | __u16 tslice; | |
68 | __u16 phys_cpus; | |
69 | __u16 this_part; | |
70 | __u64 curtod; | |
71 | } __attribute__ ((packed)); | |
72 | ||
73 | struct x_info_blk_hdr { | |
74 | __u8 npar; | |
75 | __u8 flags; | |
76 | __u16 tslice; | |
77 | __u16 phys_cpus; | |
78 | __u16 this_part; | |
79 | __u64 curtod1; | |
80 | __u64 curtod2; | |
81 | char reserved[40]; | |
82 | } __attribute__ ((packed)); | |
83 | ||
84 | static inline int info_blk_hdr__size(enum diag204_format type) | |
85 | { | |
86 | if (type == INFO_SIMPLE) | |
87 | return sizeof(struct info_blk_hdr); | |
88 | else /* INFO_EXT */ | |
89 | return sizeof(struct x_info_blk_hdr); | |
90 | } | |
91 | ||
92 | static inline __u8 info_blk_hdr__npar(enum diag204_format type, void *hdr) | |
93 | { | |
94 | if (type == INFO_SIMPLE) | |
95 | return ((struct info_blk_hdr *)hdr)->npar; | |
96 | else /* INFO_EXT */ | |
97 | return ((struct x_info_blk_hdr *)hdr)->npar; | |
98 | } | |
99 | ||
100 | static inline __u8 info_blk_hdr__flags(enum diag204_format type, void *hdr) | |
101 | { | |
102 | if (type == INFO_SIMPLE) | |
103 | return ((struct info_blk_hdr *)hdr)->flags; | |
104 | else /* INFO_EXT */ | |
105 | return ((struct x_info_blk_hdr *)hdr)->flags; | |
106 | } | |
107 | ||
108 | static inline __u16 info_blk_hdr__pcpus(enum diag204_format type, void *hdr) | |
109 | { | |
110 | if (type == INFO_SIMPLE) | |
111 | return ((struct info_blk_hdr *)hdr)->phys_cpus; | |
112 | else /* INFO_EXT */ | |
113 | return ((struct x_info_blk_hdr *)hdr)->phys_cpus; | |
114 | } | |
115 | ||
116 | /* Partition header */ | |
117 | ||
118 | struct part_hdr { | |
119 | __u8 pn; | |
120 | __u8 cpus; | |
121 | char reserved[6]; | |
122 | char part_name[LPAR_NAME_LEN]; | |
123 | } __attribute__ ((packed)); | |
124 | ||
125 | struct x_part_hdr { | |
126 | __u8 pn; | |
127 | __u8 cpus; | |
128 | __u8 rcpus; | |
129 | __u8 pflag; | |
130 | __u32 mlu; | |
131 | char part_name[LPAR_NAME_LEN]; | |
132 | char lpc_name[8]; | |
133 | char os_name[8]; | |
134 | __u64 online_cs; | |
135 | __u64 online_es; | |
136 | __u8 upid; | |
137 | char reserved1[3]; | |
138 | __u32 group_mlu; | |
139 | char group_name[8]; | |
140 | char reserved2[32]; | |
141 | } __attribute__ ((packed)); | |
142 | ||
143 | static inline int part_hdr__size(enum diag204_format type) | |
144 | { | |
145 | if (type == INFO_SIMPLE) | |
146 | return sizeof(struct part_hdr); | |
147 | else /* INFO_EXT */ | |
148 | return sizeof(struct x_part_hdr); | |
149 | } | |
150 | ||
151 | static inline __u8 part_hdr__rcpus(enum diag204_format type, void *hdr) | |
152 | { | |
153 | if (type == INFO_SIMPLE) | |
154 | return ((struct part_hdr *)hdr)->cpus; | |
155 | else /* INFO_EXT */ | |
156 | return ((struct x_part_hdr *)hdr)->rcpus; | |
157 | } | |
158 | ||
159 | static inline void part_hdr__part_name(enum diag204_format type, void *hdr, | |
160 | char *name) | |
161 | { | |
162 | if (type == INFO_SIMPLE) | |
163 | memcpy(name, ((struct part_hdr *)hdr)->part_name, | |
164 | LPAR_NAME_LEN); | |
165 | else /* INFO_EXT */ | |
166 | memcpy(name, ((struct x_part_hdr *)hdr)->part_name, | |
167 | LPAR_NAME_LEN); | |
168 | EBCASC(name, LPAR_NAME_LEN); | |
169 | name[LPAR_NAME_LEN] = 0; | |
1d802e24 | 170 | strim(name); |
24bbb1fa MH |
171 | } |
172 | ||
173 | struct cpu_info { | |
174 | __u16 cpu_addr; | |
175 | char reserved1[2]; | |
176 | __u8 ctidx; | |
177 | __u8 cflag; | |
178 | __u16 weight; | |
179 | __u64 acc_time; | |
180 | __u64 lp_time; | |
181 | } __attribute__ ((packed)); | |
182 | ||
183 | struct x_cpu_info { | |
184 | __u16 cpu_addr; | |
185 | char reserved1[2]; | |
186 | __u8 ctidx; | |
187 | __u8 cflag; | |
188 | __u16 weight; | |
189 | __u64 acc_time; | |
190 | __u64 lp_time; | |
191 | __u16 min_weight; | |
192 | __u16 cur_weight; | |
193 | __u16 max_weight; | |
194 | char reseved2[2]; | |
195 | __u64 online_time; | |
196 | __u64 wait_time; | |
197 | __u32 pma_weight; | |
198 | __u32 polar_weight; | |
199 | char reserved3[40]; | |
200 | } __attribute__ ((packed)); | |
201 | ||
202 | /* CPU info block */ | |
203 | ||
204 | static inline int cpu_info__size(enum diag204_format type) | |
205 | { | |
206 | if (type == INFO_SIMPLE) | |
207 | return sizeof(struct cpu_info); | |
208 | else /* INFO_EXT */ | |
209 | return sizeof(struct x_cpu_info); | |
210 | } | |
211 | ||
212 | static inline __u8 cpu_info__ctidx(enum diag204_format type, void *hdr) | |
213 | { | |
214 | if (type == INFO_SIMPLE) | |
215 | return ((struct cpu_info *)hdr)->ctidx; | |
216 | else /* INFO_EXT */ | |
217 | return ((struct x_cpu_info *)hdr)->ctidx; | |
218 | } | |
219 | ||
220 | static inline __u16 cpu_info__cpu_addr(enum diag204_format type, void *hdr) | |
221 | { | |
222 | if (type == INFO_SIMPLE) | |
223 | return ((struct cpu_info *)hdr)->cpu_addr; | |
224 | else /* INFO_EXT */ | |
225 | return ((struct x_cpu_info *)hdr)->cpu_addr; | |
226 | } | |
227 | ||
228 | static inline __u64 cpu_info__acc_time(enum diag204_format type, void *hdr) | |
229 | { | |
230 | if (type == INFO_SIMPLE) | |
231 | return ((struct cpu_info *)hdr)->acc_time; | |
232 | else /* INFO_EXT */ | |
233 | return ((struct x_cpu_info *)hdr)->acc_time; | |
234 | } | |
235 | ||
236 | static inline __u64 cpu_info__lp_time(enum diag204_format type, void *hdr) | |
237 | { | |
238 | if (type == INFO_SIMPLE) | |
239 | return ((struct cpu_info *)hdr)->lp_time; | |
240 | else /* INFO_EXT */ | |
241 | return ((struct x_cpu_info *)hdr)->lp_time; | |
242 | } | |
243 | ||
244 | static inline __u64 cpu_info__online_time(enum diag204_format type, void *hdr) | |
245 | { | |
246 | if (type == INFO_SIMPLE) | |
247 | return 0; /* online_time not available in simple info */ | |
248 | else /* INFO_EXT */ | |
249 | return ((struct x_cpu_info *)hdr)->online_time; | |
250 | } | |
251 | ||
252 | /* Physical header */ | |
253 | ||
254 | struct phys_hdr { | |
255 | char reserved1[1]; | |
256 | __u8 cpus; | |
257 | char reserved2[6]; | |
258 | char mgm_name[8]; | |
259 | } __attribute__ ((packed)); | |
260 | ||
261 | struct x_phys_hdr { | |
262 | char reserved1[1]; | |
263 | __u8 cpus; | |
264 | char reserved2[6]; | |
265 | char mgm_name[8]; | |
266 | char reserved3[80]; | |
267 | } __attribute__ ((packed)); | |
268 | ||
269 | static inline int phys_hdr__size(enum diag204_format type) | |
270 | { | |
271 | if (type == INFO_SIMPLE) | |
272 | return sizeof(struct phys_hdr); | |
273 | else /* INFO_EXT */ | |
274 | return sizeof(struct x_phys_hdr); | |
275 | } | |
276 | ||
277 | static inline __u8 phys_hdr__cpus(enum diag204_format type, void *hdr) | |
278 | { | |
279 | if (type == INFO_SIMPLE) | |
280 | return ((struct phys_hdr *)hdr)->cpus; | |
281 | else /* INFO_EXT */ | |
282 | return ((struct x_phys_hdr *)hdr)->cpus; | |
283 | } | |
284 | ||
285 | /* Physical CPU info block */ | |
286 | ||
287 | struct phys_cpu { | |
288 | __u16 cpu_addr; | |
289 | char reserved1[2]; | |
290 | __u8 ctidx; | |
291 | char reserved2[3]; | |
292 | __u64 mgm_time; | |
293 | char reserved3[8]; | |
294 | } __attribute__ ((packed)); | |
295 | ||
296 | struct x_phys_cpu { | |
297 | __u16 cpu_addr; | |
298 | char reserved1[2]; | |
299 | __u8 ctidx; | |
300 | char reserved2[3]; | |
301 | __u64 mgm_time; | |
302 | char reserved3[80]; | |
303 | } __attribute__ ((packed)); | |
304 | ||
305 | static inline int phys_cpu__size(enum diag204_format type) | |
306 | { | |
307 | if (type == INFO_SIMPLE) | |
308 | return sizeof(struct phys_cpu); | |
309 | else /* INFO_EXT */ | |
310 | return sizeof(struct x_phys_cpu); | |
311 | } | |
312 | ||
313 | static inline __u16 phys_cpu__cpu_addr(enum diag204_format type, void *hdr) | |
314 | { | |
315 | if (type == INFO_SIMPLE) | |
316 | return ((struct phys_cpu *)hdr)->cpu_addr; | |
317 | else /* INFO_EXT */ | |
318 | return ((struct x_phys_cpu *)hdr)->cpu_addr; | |
319 | } | |
320 | ||
321 | static inline __u64 phys_cpu__mgm_time(enum diag204_format type, void *hdr) | |
322 | { | |
323 | if (type == INFO_SIMPLE) | |
324 | return ((struct phys_cpu *)hdr)->mgm_time; | |
325 | else /* INFO_EXT */ | |
326 | return ((struct x_phys_cpu *)hdr)->mgm_time; | |
327 | } | |
328 | ||
329 | static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr) | |
330 | { | |
331 | if (type == INFO_SIMPLE) | |
332 | return ((struct phys_cpu *)hdr)->ctidx; | |
333 | else /* INFO_EXT */ | |
334 | return ((struct x_phys_cpu *)hdr)->ctidx; | |
335 | } | |
336 | ||
337 | /* Diagnose 204 functions */ | |
338 | ||
339 | static int diag204(unsigned long subcode, unsigned long size, void *addr) | |
340 | { | |
341 | register unsigned long _subcode asm("0") = subcode; | |
342 | register unsigned long _size asm("1") = size; | |
343 | ||
94c12cc7 MS |
344 | asm volatile( |
345 | " diag %2,%0,0x204\n" | |
346 | "0:\n" | |
347 | EX_TABLE(0b,0b) | |
348 | : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory"); | |
24bbb1fa MH |
349 | if (_subcode) |
350 | return -1; | |
94c12cc7 | 351 | return _size; |
24bbb1fa MH |
352 | } |
353 | ||
354 | /* | |
355 | * For the old diag subcode 4 with simple data format we have to use real | |
356 | * memory. If we use subcode 6 or 7 with extended data format, we can (and | |
357 | * should) use vmalloc, since we need a lot of memory in that case. Currently | |
358 | * up to 93 pages! | |
359 | */ | |
360 | ||
361 | static void diag204_free_buffer(void) | |
362 | { | |
363 | if (!diag204_buf) | |
364 | return; | |
365 | if (diag204_buf_vmalloc) { | |
366 | vfree(diag204_buf_vmalloc); | |
367 | diag204_buf_vmalloc = NULL; | |
368 | } else { | |
369 | free_pages((unsigned long) diag204_buf, 0); | |
370 | } | |
24bbb1fa MH |
371 | diag204_buf = NULL; |
372 | } | |
373 | ||
57b28f66 MH |
374 | static void *page_align_ptr(void *ptr) |
375 | { | |
376 | return (void *) PAGE_ALIGN((unsigned long) ptr); | |
377 | } | |
378 | ||
24bbb1fa MH |
379 | static void *diag204_alloc_vbuf(int pages) |
380 | { | |
381 | /* The buffer has to be page aligned! */ | |
382 | diag204_buf_vmalloc = vmalloc(PAGE_SIZE * (pages + 1)); | |
383 | if (!diag204_buf_vmalloc) | |
384 | return ERR_PTR(-ENOMEM); | |
57b28f66 | 385 | diag204_buf = page_align_ptr(diag204_buf_vmalloc); |
24bbb1fa MH |
386 | diag204_buf_pages = pages; |
387 | return diag204_buf; | |
388 | } | |
389 | ||
390 | static void *diag204_alloc_rbuf(void) | |
391 | { | |
392 | diag204_buf = (void*)__get_free_pages(GFP_KERNEL,0); | |
86b22470 | 393 | if (!diag204_buf) |
24bbb1fa MH |
394 | return ERR_PTR(-ENOMEM); |
395 | diag204_buf_pages = 1; | |
396 | return diag204_buf; | |
397 | } | |
398 | ||
399 | static void *diag204_get_buffer(enum diag204_format fmt, int *pages) | |
400 | { | |
401 | if (diag204_buf) { | |
402 | *pages = diag204_buf_pages; | |
403 | return diag204_buf; | |
404 | } | |
405 | if (fmt == INFO_SIMPLE) { | |
406 | *pages = 1; | |
407 | return diag204_alloc_rbuf(); | |
408 | } else {/* INFO_EXT */ | |
23c100d9 MH |
409 | *pages = diag204((unsigned long)SUBC_RSI | |
410 | (unsigned long)INFO_EXT, 0, NULL); | |
24bbb1fa MH |
411 | if (*pages <= 0) |
412 | return ERR_PTR(-ENOSYS); | |
413 | else | |
414 | return diag204_alloc_vbuf(*pages); | |
415 | } | |
416 | } | |
417 | ||
418 | /* | |
419 | * diag204_probe() has to find out, which type of diagnose 204 implementation | |
420 | * we have on our machine. Currently there are three possible scanarios: | |
421 | * - subcode 4 + simple data format (only one page) | |
422 | * - subcode 4-6 + extended data format | |
423 | * - subcode 4-7 + extended data format | |
424 | * | |
425 | * Subcode 5 is used to retrieve the size of the data, provided by subcodes | |
426 | * 6 and 7. Subcode 7 basically has the same function as subcode 6. In addition | |
427 | * to subcode 6 it provides also information about secondary cpus. | |
428 | * In order to get as much information as possible, we first try | |
429 | * subcode 7, then 6 and if both fail, we use subcode 4. | |
430 | */ | |
431 | ||
432 | static int diag204_probe(void) | |
433 | { | |
434 | void *buf; | |
435 | int pages, rc; | |
436 | ||
437 | buf = diag204_get_buffer(INFO_EXT, &pages); | |
438 | if (!IS_ERR(buf)) { | |
331c982d MH |
439 | if (diag204((unsigned long)SUBC_STIB7 | |
440 | (unsigned long)INFO_EXT, pages, buf) >= 0) { | |
24bbb1fa MH |
441 | diag204_store_sc = SUBC_STIB7; |
442 | diag204_info_type = INFO_EXT; | |
443 | goto out; | |
444 | } | |
331c982d MH |
445 | if (diag204((unsigned long)SUBC_STIB6 | |
446 | (unsigned long)INFO_EXT, pages, buf) >= 0) { | |
7874b1b6 | 447 | diag204_store_sc = SUBC_STIB6; |
24bbb1fa MH |
448 | diag204_info_type = INFO_EXT; |
449 | goto out; | |
450 | } | |
451 | diag204_free_buffer(); | |
452 | } | |
453 | ||
454 | /* subcodes 6 and 7 failed, now try subcode 4 */ | |
455 | ||
456 | buf = diag204_get_buffer(INFO_SIMPLE, &pages); | |
457 | if (IS_ERR(buf)) { | |
458 | rc = PTR_ERR(buf); | |
459 | goto fail_alloc; | |
460 | } | |
331c982d MH |
461 | if (diag204((unsigned long)SUBC_STIB4 | |
462 | (unsigned long)INFO_SIMPLE, pages, buf) >= 0) { | |
24bbb1fa MH |
463 | diag204_store_sc = SUBC_STIB4; |
464 | diag204_info_type = INFO_SIMPLE; | |
465 | goto out; | |
466 | } else { | |
467 | rc = -ENOSYS; | |
468 | goto fail_store; | |
469 | } | |
470 | out: | |
471 | rc = 0; | |
472 | fail_store: | |
473 | diag204_free_buffer(); | |
474 | fail_alloc: | |
475 | return rc; | |
476 | } | |
477 | ||
57b28f66 MH |
478 | static int diag204_do_store(void *buf, int pages) |
479 | { | |
480 | int rc; | |
481 | ||
482 | rc = diag204((unsigned long) diag204_store_sc | | |
483 | (unsigned long) diag204_info_type, pages, buf); | |
484 | return rc < 0 ? -ENOSYS : 0; | |
485 | } | |
486 | ||
24bbb1fa MH |
487 | static void *diag204_store(void) |
488 | { | |
489 | void *buf; | |
57b28f66 | 490 | int pages, rc; |
24bbb1fa MH |
491 | |
492 | buf = diag204_get_buffer(diag204_info_type, &pages); | |
493 | if (IS_ERR(buf)) | |
494 | goto out; | |
57b28f66 MH |
495 | rc = diag204_do_store(buf, pages); |
496 | if (rc) | |
497 | return ERR_PTR(rc); | |
24bbb1fa MH |
498 | out: |
499 | return buf; | |
500 | } | |
501 | ||
502 | /* Diagnose 224 functions */ | |
503 | ||
c41d4e3e | 504 | static int diag224(void *ptr) |
24bbb1fa | 505 | { |
b8e660b8 | 506 | int rc = -EOPNOTSUPP; |
c41d4e3e MH |
507 | |
508 | asm volatile( | |
509 | " diag %1,%2,0x224\n" | |
510 | "0: lhi %0,0x0\n" | |
511 | "1:\n" | |
512 | EX_TABLE(0b,1b) | |
513 | : "+d" (rc) :"d" (0), "d" (ptr) : "memory"); | |
514 | return rc; | |
24bbb1fa MH |
515 | } |
516 | ||
517 | static int diag224_get_name_table(void) | |
518 | { | |
519 | /* memory must be below 2GB */ | |
520 | diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA); | |
521 | if (!diag224_cpu_names) | |
522 | return -ENOMEM; | |
c41d4e3e MH |
523 | if (diag224(diag224_cpu_names)) { |
524 | kfree(diag224_cpu_names); | |
b8e660b8 | 525 | return -EOPNOTSUPP; |
c41d4e3e | 526 | } |
24bbb1fa MH |
527 | EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16); |
528 | return 0; | |
529 | } | |
530 | ||
531 | static void diag224_delete_name_table(void) | |
532 | { | |
533 | kfree(diag224_cpu_names); | |
534 | } | |
535 | ||
536 | static int diag224_idx2name(int index, char *name) | |
537 | { | |
538 | memcpy(name, diag224_cpu_names + ((index + 1) * CPU_NAME_LEN), | |
539 | CPU_NAME_LEN); | |
540 | name[CPU_NAME_LEN] = 0; | |
1d802e24 | 541 | strim(name); |
24bbb1fa MH |
542 | return 0; |
543 | } | |
544 | ||
57b28f66 MH |
545 | struct dbfs_d204_hdr { |
546 | u64 len; /* Length of d204 buffer without header */ | |
547 | u16 version; /* Version of header */ | |
548 | u8 sc; /* Used subcode */ | |
549 | char reserved[53]; | |
550 | } __attribute__ ((packed)); | |
551 | ||
552 | struct dbfs_d204 { | |
553 | struct dbfs_d204_hdr hdr; /* 64 byte header */ | |
554 | char buf[]; /* d204 buffer */ | |
555 | } __attribute__ ((packed)); | |
556 | ||
2fcb3686 | 557 | static int dbfs_d204_create(void **data, void **data_free_ptr, size_t *size) |
57b28f66 | 558 | { |
57b28f66 MH |
559 | struct dbfs_d204 *d204; |
560 | int rc, buf_size; | |
2fcb3686 | 561 | void *base; |
57b28f66 | 562 | |
57b28f66 | 563 | buf_size = PAGE_SIZE * (diag204_buf_pages + 1) + sizeof(d204->hdr); |
dc8a5c99 | 564 | base = vzalloc(buf_size); |
2fcb3686 MH |
565 | if (!base) |
566 | return -ENOMEM; | |
2fcb3686 MH |
567 | d204 = page_align_ptr(base + sizeof(d204->hdr)) - sizeof(d204->hdr); |
568 | rc = diag204_do_store(d204->buf, diag204_buf_pages); | |
569 | if (rc) { | |
570 | vfree(base); | |
571 | return rc; | |
57b28f66 | 572 | } |
57b28f66 MH |
573 | d204->hdr.version = DBFS_D204_HDR_VERSION; |
574 | d204->hdr.len = PAGE_SIZE * diag204_buf_pages; | |
575 | d204->hdr.sc = diag204_store_sc; | |
2fcb3686 MH |
576 | *data = d204; |
577 | *data_free_ptr = base; | |
578 | *size = d204->hdr.len + sizeof(struct dbfs_d204_hdr); | |
57b28f66 MH |
579 | return 0; |
580 | } | |
581 | ||
2fcb3686 MH |
582 | static struct hypfs_dbfs_file dbfs_file_d204 = { |
583 | .name = "diag_204", | |
584 | .data_create = dbfs_d204_create, | |
585 | .data_free = vfree, | |
57b28f66 MH |
586 | }; |
587 | ||
24bbb1fa MH |
588 | __init int hypfs_diag_init(void) |
589 | { | |
590 | int rc; | |
591 | ||
592 | if (diag204_probe()) { | |
f55495ba | 593 | pr_err("The hardware system does not support hypfs\n"); |
24bbb1fa MH |
594 | return -ENODATA; |
595 | } | |
57b28f66 | 596 | if (diag204_info_type == INFO_EXT) { |
2fcb3686 | 597 | rc = hypfs_dbfs_create_file(&dbfs_file_d204); |
57b28f66 | 598 | if (rc) |
3c8ebca0 | 599 | return rc; |
57b28f66 | 600 | } |
3c8ebca0 MH |
601 | if (MACHINE_IS_LPAR) { |
602 | rc = diag224_get_name_table(); | |
603 | if (rc) { | |
604 | pr_err("The hardware system does not provide all " | |
605 | "functions required by hypfs\n"); | |
606 | debugfs_remove(dbfs_d204_file); | |
607 | return rc; | |
608 | } | |
609 | } | |
610 | return 0; | |
24bbb1fa MH |
611 | } |
612 | ||
1375fc1f | 613 | void hypfs_diag_exit(void) |
24bbb1fa | 614 | { |
57b28f66 | 615 | debugfs_remove(dbfs_d204_file); |
24bbb1fa MH |
616 | diag224_delete_name_table(); |
617 | diag204_free_buffer(); | |
2fcb3686 | 618 | hypfs_dbfs_remove_file(&dbfs_file_d204); |
24bbb1fa MH |
619 | } |
620 | ||
621 | /* | |
622 | * Functions to create the directory structure | |
623 | * ******************************************* | |
624 | */ | |
625 | ||
e334cf4f | 626 | static int hypfs_create_cpu_files(struct dentry *cpus_dir, void *cpu_info) |
24bbb1fa MH |
627 | { |
628 | struct dentry *cpu_dir; | |
629 | char buffer[TMP_SIZE]; | |
630 | void *rc; | |
631 | ||
632 | snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_info_type, | |
633 | cpu_info)); | |
a118cfdf AV |
634 | cpu_dir = hypfs_mkdir(cpus_dir, buffer); |
635 | rc = hypfs_create_u64(cpu_dir, "mgmtime", | |
24bbb1fa MH |
636 | cpu_info__acc_time(diag204_info_type, cpu_info) - |
637 | cpu_info__lp_time(diag204_info_type, cpu_info)); | |
638 | if (IS_ERR(rc)) | |
639 | return PTR_ERR(rc); | |
a118cfdf | 640 | rc = hypfs_create_u64(cpu_dir, "cputime", |
24bbb1fa MH |
641 | cpu_info__lp_time(diag204_info_type, cpu_info)); |
642 | if (IS_ERR(rc)) | |
643 | return PTR_ERR(rc); | |
644 | if (diag204_info_type == INFO_EXT) { | |
a118cfdf | 645 | rc = hypfs_create_u64(cpu_dir, "onlinetime", |
24bbb1fa MH |
646 | cpu_info__online_time(diag204_info_type, |
647 | cpu_info)); | |
648 | if (IS_ERR(rc)) | |
649 | return PTR_ERR(rc); | |
650 | } | |
651 | diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer); | |
a118cfdf | 652 | rc = hypfs_create_str(cpu_dir, "type", buffer); |
5eba9bb8 | 653 | return PTR_RET(rc); |
24bbb1fa MH |
654 | } |
655 | ||
e334cf4f | 656 | static void *hypfs_create_lpar_files(struct dentry *systems_dir, void *part_hdr) |
24bbb1fa MH |
657 | { |
658 | struct dentry *cpus_dir; | |
659 | struct dentry *lpar_dir; | |
660 | char lpar_name[LPAR_NAME_LEN + 1]; | |
661 | void *cpu_info; | |
662 | int i; | |
663 | ||
664 | part_hdr__part_name(diag204_info_type, part_hdr, lpar_name); | |
665 | lpar_name[LPAR_NAME_LEN] = 0; | |
a118cfdf | 666 | lpar_dir = hypfs_mkdir(systems_dir, lpar_name); |
24bbb1fa MH |
667 | if (IS_ERR(lpar_dir)) |
668 | return lpar_dir; | |
a118cfdf | 669 | cpus_dir = hypfs_mkdir(lpar_dir, "cpus"); |
24bbb1fa MH |
670 | if (IS_ERR(cpus_dir)) |
671 | return cpus_dir; | |
672 | cpu_info = part_hdr + part_hdr__size(diag204_info_type); | |
673 | for (i = 0; i < part_hdr__rcpus(diag204_info_type, part_hdr); i++) { | |
674 | int rc; | |
e334cf4f | 675 | rc = hypfs_create_cpu_files(cpus_dir, cpu_info); |
24bbb1fa MH |
676 | if (rc) |
677 | return ERR_PTR(rc); | |
678 | cpu_info += cpu_info__size(diag204_info_type); | |
679 | } | |
680 | return cpu_info; | |
681 | } | |
682 | ||
e334cf4f | 683 | static int hypfs_create_phys_cpu_files(struct dentry *cpus_dir, void *cpu_info) |
24bbb1fa MH |
684 | { |
685 | struct dentry *cpu_dir; | |
686 | char buffer[TMP_SIZE]; | |
687 | void *rc; | |
688 | ||
689 | snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type, | |
690 | cpu_info)); | |
a118cfdf | 691 | cpu_dir = hypfs_mkdir(cpus_dir, buffer); |
24bbb1fa MH |
692 | if (IS_ERR(cpu_dir)) |
693 | return PTR_ERR(cpu_dir); | |
a118cfdf | 694 | rc = hypfs_create_u64(cpu_dir, "mgmtime", |
24bbb1fa MH |
695 | phys_cpu__mgm_time(diag204_info_type, cpu_info)); |
696 | if (IS_ERR(rc)) | |
697 | return PTR_ERR(rc); | |
698 | diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer); | |
a118cfdf | 699 | rc = hypfs_create_str(cpu_dir, "type", buffer); |
5eba9bb8 | 700 | return PTR_RET(rc); |
24bbb1fa MH |
701 | } |
702 | ||
e334cf4f | 703 | static void *hypfs_create_phys_files(struct dentry *parent_dir, void *phys_hdr) |
24bbb1fa MH |
704 | { |
705 | int i; | |
706 | void *cpu_info; | |
707 | struct dentry *cpus_dir; | |
708 | ||
a118cfdf | 709 | cpus_dir = hypfs_mkdir(parent_dir, "cpus"); |
24bbb1fa MH |
710 | if (IS_ERR(cpus_dir)) |
711 | return cpus_dir; | |
712 | cpu_info = phys_hdr + phys_hdr__size(diag204_info_type); | |
713 | for (i = 0; i < phys_hdr__cpus(diag204_info_type, phys_hdr); i++) { | |
714 | int rc; | |
e334cf4f | 715 | rc = hypfs_create_phys_cpu_files(cpus_dir, cpu_info); |
24bbb1fa MH |
716 | if (rc) |
717 | return ERR_PTR(rc); | |
718 | cpu_info += phys_cpu__size(diag204_info_type); | |
719 | } | |
720 | return cpu_info; | |
721 | } | |
722 | ||
e334cf4f | 723 | int hypfs_diag_create_files(struct dentry *root) |
24bbb1fa MH |
724 | { |
725 | struct dentry *systems_dir, *hyp_dir; | |
726 | void *time_hdr, *part_hdr; | |
727 | int i, rc; | |
728 | void *buffer, *ptr; | |
729 | ||
730 | buffer = diag204_store(); | |
731 | if (IS_ERR(buffer)) | |
732 | return PTR_ERR(buffer); | |
733 | ||
a118cfdf | 734 | systems_dir = hypfs_mkdir(root, "systems"); |
24bbb1fa MH |
735 | if (IS_ERR(systems_dir)) { |
736 | rc = PTR_ERR(systems_dir); | |
737 | goto err_out; | |
738 | } | |
739 | time_hdr = (struct x_info_blk_hdr *)buffer; | |
740 | part_hdr = time_hdr + info_blk_hdr__size(diag204_info_type); | |
741 | for (i = 0; i < info_blk_hdr__npar(diag204_info_type, time_hdr); i++) { | |
e334cf4f | 742 | part_hdr = hypfs_create_lpar_files(systems_dir, part_hdr); |
24bbb1fa MH |
743 | if (IS_ERR(part_hdr)) { |
744 | rc = PTR_ERR(part_hdr); | |
745 | goto err_out; | |
746 | } | |
747 | } | |
748 | if (info_blk_hdr__flags(diag204_info_type, time_hdr) & LPAR_PHYS_FLG) { | |
e334cf4f | 749 | ptr = hypfs_create_phys_files(root, part_hdr); |
24bbb1fa MH |
750 | if (IS_ERR(ptr)) { |
751 | rc = PTR_ERR(ptr); | |
752 | goto err_out; | |
753 | } | |
754 | } | |
a118cfdf | 755 | hyp_dir = hypfs_mkdir(root, "hyp"); |
24bbb1fa MH |
756 | if (IS_ERR(hyp_dir)) { |
757 | rc = PTR_ERR(hyp_dir); | |
758 | goto err_out; | |
759 | } | |
a118cfdf | 760 | ptr = hypfs_create_str(hyp_dir, "type", "LPAR Hypervisor"); |
24bbb1fa MH |
761 | if (IS_ERR(ptr)) { |
762 | rc = PTR_ERR(ptr); | |
763 | goto err_out; | |
764 | } | |
765 | rc = 0; | |
766 | ||
767 | err_out: | |
768 | return rc; | |
769 | } |