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oprofile, arm/sh: Fix oprofile_arch_exit() linkage issue
[linux-2.6.git] / arch / s390 / hypfs / hypfs_diag.c
blob74c8f5e76ce4fffdfedaa9c7745f9a34dacc4abc
1 /*
2 * arch/s390/hypfs/hypfs_diag.c
3 * Hypervisor filesystem for Linux on s390. Diag 204 and 224
4 * implementation.
5 *
6 * Copyright IBM Corp. 2006, 2008
7 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
8 */
9
10 #define KMSG_COMPONENT "hypfs"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
13 #include <linux/types.h>
14 #include <linux/errno.h>
15 #include <linux/slab.h>
16 #include <linux/string.h>
17 #include <linux/vmalloc.h>
18 #include <linux/mm.h>
19 #include <asm/ebcdic.h>
20 #include "hypfs.h"
21
22 #define LPAR_NAME_LEN 8 /* lpar name len in diag 204 data */
23 #define CPU_NAME_LEN 16 /* type name len of cpus in diag224 name table */
24 #define TMP_SIZE 64 /* size of temporary buffers */
25
26 #define DBFS_D204_HDR_VERSION 0
27
28 /* diag 204 subcodes */
29 enum diag204_sc {
30 SUBC_STIB4 = 4,
31 SUBC_RSI = 5,
32 SUBC_STIB6 = 6,
33 SUBC_STIB7 = 7
34 };
35
36 /* The two available diag 204 data formats */
37 enum diag204_format {
38 INFO_SIMPLE = 0,
39 INFO_EXT = 0x00010000
40 };
41
42 /* bit is set in flags, when physical cpu info is included in diag 204 data */
43 #define LPAR_PHYS_FLG 0x80
44
45 static char *diag224_cpu_names; /* diag 224 name table */
46 static enum diag204_sc diag204_store_sc; /* used subcode for store */
47 static enum diag204_format diag204_info_type; /* used diag 204 data format */
48
49 static void *diag204_buf; /* 4K aligned buffer for diag204 data */
50 static void *diag204_buf_vmalloc; /* vmalloc pointer for diag204 data */
51 static int diag204_buf_pages; /* number of pages for diag204 data */
52
53 static struct dentry *dbfs_d204_file;
54
55 /*
56 * DIAG 204 data structures and member access functions.
57 *
58 * Since we have two different diag 204 data formats for old and new s390
59 * machines, we do not access the structs directly, but use getter functions for
60 * each struct member instead. This should make the code more readable.
61 */
62
63 /* Time information block */
64
65 struct info_blk_hdr {
66 __u8 npar;
67 __u8 flags;
68 __u16 tslice;
69 __u16 phys_cpus;
70 __u16 this_part;
71 __u64 curtod;
72 } __attribute__ ((packed));
73
74 struct x_info_blk_hdr {
75 __u8 npar;
76 __u8 flags;
77 __u16 tslice;
78 __u16 phys_cpus;
79 __u16 this_part;
80 __u64 curtod1;
81 __u64 curtod2;
82 char reserved[40];
83 } __attribute__ ((packed));
84
85 static inline int info_blk_hdr__size(enum diag204_format type)
86 {
87 if (type == INFO_SIMPLE)
88 return sizeof(struct info_blk_hdr);
89 else /* INFO_EXT */
90 return sizeof(struct x_info_blk_hdr);
91 }
92
93 static inline __u8 info_blk_hdr__npar(enum diag204_format type, void *hdr)
94 {
95 if (type == INFO_SIMPLE)
96 return ((struct info_blk_hdr *)hdr)->npar;
97 else /* INFO_EXT */
98 return ((struct x_info_blk_hdr *)hdr)->npar;
99 }
100
101 static inline __u8 info_blk_hdr__flags(enum diag204_format type, void *hdr)
102 {
103 if (type == INFO_SIMPLE)
104 return ((struct info_blk_hdr *)hdr)->flags;
105 else /* INFO_EXT */
106 return ((struct x_info_blk_hdr *)hdr)->flags;
107 }
108
109 static inline __u16 info_blk_hdr__pcpus(enum diag204_format type, void *hdr)
110 {
111 if (type == INFO_SIMPLE)
112 return ((struct info_blk_hdr *)hdr)->phys_cpus;
113 else /* INFO_EXT */
114 return ((struct x_info_blk_hdr *)hdr)->phys_cpus;
115 }
116
117 /* Partition header */
118
119 struct part_hdr {
120 __u8 pn;
121 __u8 cpus;
122 char reserved[6];
123 char part_name[LPAR_NAME_LEN];
124 } __attribute__ ((packed));
125
126 struct x_part_hdr {
127 __u8 pn;
128 __u8 cpus;
129 __u8 rcpus;
130 __u8 pflag;
131 __u32 mlu;
132 char part_name[LPAR_NAME_LEN];
133 char lpc_name[8];
134 char os_name[8];
135 __u64 online_cs;
136 __u64 online_es;
137 __u8 upid;
138 char reserved1[3];
139 __u32 group_mlu;
140 char group_name[8];
141 char reserved2[32];
142 } __attribute__ ((packed));
143
144 static inline int part_hdr__size(enum diag204_format type)
145 {
146 if (type == INFO_SIMPLE)
147 return sizeof(struct part_hdr);
148 else /* INFO_EXT */
149 return sizeof(struct x_part_hdr);
150 }
151
152 static inline __u8 part_hdr__rcpus(enum diag204_format type, void *hdr)
153 {
154 if (type == INFO_SIMPLE)
155 return ((struct part_hdr *)hdr)->cpus;
156 else /* INFO_EXT */
157 return ((struct x_part_hdr *)hdr)->rcpus;
158 }
159
160 static inline void part_hdr__part_name(enum diag204_format type, void *hdr,
161 char *name)
162 {
163 if (type == INFO_SIMPLE)
164 memcpy(name, ((struct part_hdr *)hdr)->part_name,
165 LPAR_NAME_LEN);
166 else /* INFO_EXT */
167 memcpy(name, ((struct x_part_hdr *)hdr)->part_name,
168 LPAR_NAME_LEN);
169 EBCASC(name, LPAR_NAME_LEN);
170 name[LPAR_NAME_LEN] = 0;
171 strim(name);
172 }
173
174 struct cpu_info {
175 __u16 cpu_addr;
176 char reserved1[2];
177 __u8 ctidx;
178 __u8 cflag;
179 __u16 weight;
180 __u64 acc_time;
181 __u64 lp_time;
182 } __attribute__ ((packed));
183
184 struct x_cpu_info {
185 __u16 cpu_addr;
186 char reserved1[2];
187 __u8 ctidx;
188 __u8 cflag;
189 __u16 weight;
190 __u64 acc_time;
191 __u64 lp_time;
192 __u16 min_weight;
193 __u16 cur_weight;
194 __u16 max_weight;
195 char reseved2[2];
196 __u64 online_time;
197 __u64 wait_time;
198 __u32 pma_weight;
199 __u32 polar_weight;
200 char reserved3[40];
201 } __attribute__ ((packed));
202
203 /* CPU info block */
204
205 static inline int cpu_info__size(enum diag204_format type)
206 {
207 if (type == INFO_SIMPLE)
208 return sizeof(struct cpu_info);
209 else /* INFO_EXT */
210 return sizeof(struct x_cpu_info);
211 }
212
213 static inline __u8 cpu_info__ctidx(enum diag204_format type, void *hdr)
214 {
215 if (type == INFO_SIMPLE)
216 return ((struct cpu_info *)hdr)->ctidx;
217 else /* INFO_EXT */
218 return ((struct x_cpu_info *)hdr)->ctidx;
219 }
220
221 static inline __u16 cpu_info__cpu_addr(enum diag204_format type, void *hdr)
222 {
223 if (type == INFO_SIMPLE)
224 return ((struct cpu_info *)hdr)->cpu_addr;
225 else /* INFO_EXT */
226 return ((struct x_cpu_info *)hdr)->cpu_addr;
227 }
228
229 static inline __u64 cpu_info__acc_time(enum diag204_format type, void *hdr)
230 {
231 if (type == INFO_SIMPLE)
232 return ((struct cpu_info *)hdr)->acc_time;
233 else /* INFO_EXT */
234 return ((struct x_cpu_info *)hdr)->acc_time;
235 }
236
237 static inline __u64 cpu_info__lp_time(enum diag204_format type, void *hdr)
238 {
239 if (type == INFO_SIMPLE)
240 return ((struct cpu_info *)hdr)->lp_time;
241 else /* INFO_EXT */
242 return ((struct x_cpu_info *)hdr)->lp_time;
243 }
244
245 static inline __u64 cpu_info__online_time(enum diag204_format type, void *hdr)
246 {
247 if (type == INFO_SIMPLE)
248 return 0; /* online_time not available in simple info */
249 else /* INFO_EXT */
250 return ((struct x_cpu_info *)hdr)->online_time;
251 }
252
253 /* Physical header */
254
255 struct phys_hdr {
256 char reserved1[1];
257 __u8 cpus;
258 char reserved2[6];
259 char mgm_name[8];
260 } __attribute__ ((packed));
261
262 struct x_phys_hdr {
263 char reserved1[1];
264 __u8 cpus;
265 char reserved2[6];
266 char mgm_name[8];
267 char reserved3[80];
268 } __attribute__ ((packed));
269
270 static inline int phys_hdr__size(enum diag204_format type)
271 {
272 if (type == INFO_SIMPLE)
273 return sizeof(struct phys_hdr);
274 else /* INFO_EXT */
275 return sizeof(struct x_phys_hdr);
276 }
277
278 static inline __u8 phys_hdr__cpus(enum diag204_format type, void *hdr)
279 {
280 if (type == INFO_SIMPLE)
281 return ((struct phys_hdr *)hdr)->cpus;
282 else /* INFO_EXT */
283 return ((struct x_phys_hdr *)hdr)->cpus;
284 }
285
286 /* Physical CPU info block */
287
288 struct phys_cpu {
289 __u16 cpu_addr;
290 char reserved1[2];
291 __u8 ctidx;
292 char reserved2[3];
293 __u64 mgm_time;
294 char reserved3[8];
295 } __attribute__ ((packed));
296
297 struct x_phys_cpu {
298 __u16 cpu_addr;
299 char reserved1[2];
300 __u8 ctidx;
301 char reserved2[3];
302 __u64 mgm_time;
303 char reserved3[80];
304 } __attribute__ ((packed));
305
306 static inline int phys_cpu__size(enum diag204_format type)
307 {
308 if (type == INFO_SIMPLE)
309 return sizeof(struct phys_cpu);
310 else /* INFO_EXT */
311 return sizeof(struct x_phys_cpu);
312 }
313
314 static inline __u16 phys_cpu__cpu_addr(enum diag204_format type, void *hdr)
315 {
316 if (type == INFO_SIMPLE)
317 return ((struct phys_cpu *)hdr)->cpu_addr;
318 else /* INFO_EXT */
319 return ((struct x_phys_cpu *)hdr)->cpu_addr;
320 }
321
322 static inline __u64 phys_cpu__mgm_time(enum diag204_format type, void *hdr)
323 {
324 if (type == INFO_SIMPLE)
325 return ((struct phys_cpu *)hdr)->mgm_time;
326 else /* INFO_EXT */
327 return ((struct x_phys_cpu *)hdr)->mgm_time;
328 }
329
330 static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr)
331 {
332 if (type == INFO_SIMPLE)
333 return ((struct phys_cpu *)hdr)->ctidx;
334 else /* INFO_EXT */
335 return ((struct x_phys_cpu *)hdr)->ctidx;
336 }
337
338 /* Diagnose 204 functions */
339
340 static int diag204(unsigned long subcode, unsigned long size, void *addr)
341 {
342 register unsigned long _subcode asm("0") = subcode;
343 register unsigned long _size asm("1") = size;
344
345 asm volatile(
346 " diag %2,%0,0x204\n"
347 "0:\n"
348 EX_TABLE(0b,0b)
349 : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory");
350 if (_subcode)
351 return -1;
352 return _size;
353 }
354
355 /*
356 * For the old diag subcode 4 with simple data format we have to use real
357 * memory. If we use subcode 6 or 7 with extended data format, we can (and
358 * should) use vmalloc, since we need a lot of memory in that case. Currently
359 * up to 93 pages!
360 */
361
362 static void diag204_free_buffer(void)
363 {
364 if (!diag204_buf)
365 return;
366 if (diag204_buf_vmalloc) {
367 vfree(diag204_buf_vmalloc);
368 diag204_buf_vmalloc = NULL;
369 } else {
370 free_pages((unsigned long) diag204_buf, 0);
371 }
372 diag204_buf = NULL;
373 }
374
375 static void *page_align_ptr(void *ptr)
376 {
377 return (void *) PAGE_ALIGN((unsigned long) ptr);
378 }
379
380 static void *diag204_alloc_vbuf(int pages)
381 {
382 /* The buffer has to be page aligned! */
383 diag204_buf_vmalloc = vmalloc(PAGE_SIZE * (pages + 1));
384 if (!diag204_buf_vmalloc)
385 return ERR_PTR(-ENOMEM);
386 diag204_buf = page_align_ptr(diag204_buf_vmalloc);
387 diag204_buf_pages = pages;
388 return diag204_buf;
389 }
390
391 static void *diag204_alloc_rbuf(void)
392 {
393 diag204_buf = (void*)__get_free_pages(GFP_KERNEL,0);
394 if (!diag204_buf)
395 return ERR_PTR(-ENOMEM);
396 diag204_buf_pages = 1;
397 return diag204_buf;
398 }
399
400 static void *diag204_get_buffer(enum diag204_format fmt, int *pages)
401 {
402 if (diag204_buf) {
403 *pages = diag204_buf_pages;
404 return diag204_buf;
405 }
406 if (fmt == INFO_SIMPLE) {
407 *pages = 1;
408 return diag204_alloc_rbuf();
409 } else {/* INFO_EXT */
410 *pages = diag204((unsigned long)SUBC_RSI |
411 (unsigned long)INFO_EXT, 0, NULL);
412 if (*pages <= 0)
413 return ERR_PTR(-ENOSYS);
414 else
415 return diag204_alloc_vbuf(*pages);
416 }
417 }
418
419 /*
420 * diag204_probe() has to find out, which type of diagnose 204 implementation
421 * we have on our machine. Currently there are three possible scanarios:
422 * - subcode 4 + simple data format (only one page)
423 * - subcode 4-6 + extended data format
424 * - subcode 4-7 + extended data format
425 *
426 * Subcode 5 is used to retrieve the size of the data, provided by subcodes
427 * 6 and 7. Subcode 7 basically has the same function as subcode 6. In addition
428 * to subcode 6 it provides also information about secondary cpus.
429 * In order to get as much information as possible, we first try
430 * subcode 7, then 6 and if both fail, we use subcode 4.
431 */
432
433 static int diag204_probe(void)
434 {
435 void *buf;
436 int pages, rc;
437
438 buf = diag204_get_buffer(INFO_EXT, &pages);
439 if (!IS_ERR(buf)) {
440 if (diag204((unsigned long)SUBC_STIB7 |
441 (unsigned long)INFO_EXT, pages, buf) >= 0) {
442 diag204_store_sc = SUBC_STIB7;
443 diag204_info_type = INFO_EXT;
444 goto out;
445 }
446 if (diag204((unsigned long)SUBC_STIB6 |
447 (unsigned long)INFO_EXT, pages, buf) >= 0) {
448 diag204_store_sc = SUBC_STIB6;
449 diag204_info_type = INFO_EXT;
450 goto out;
451 }
452 diag204_free_buffer();
453 }
454
455 /* subcodes 6 and 7 failed, now try subcode 4 */
456
457 buf = diag204_get_buffer(INFO_SIMPLE, &pages);
458 if (IS_ERR(buf)) {
459 rc = PTR_ERR(buf);
460 goto fail_alloc;
461 }
462 if (diag204((unsigned long)SUBC_STIB4 |
463 (unsigned long)INFO_SIMPLE, pages, buf) >= 0) {
464 diag204_store_sc = SUBC_STIB4;
465 diag204_info_type = INFO_SIMPLE;
466 goto out;
467 } else {
468 rc = -ENOSYS;
469 goto fail_store;
470 }
471 out:
472 rc = 0;
473 fail_store:
474 diag204_free_buffer();
475 fail_alloc:
476 return rc;
477 }
478
479 static int diag204_do_store(void *buf, int pages)
480 {
481 int rc;
482
483 rc = diag204((unsigned long) diag204_store_sc |
484 (unsigned long) diag204_info_type, pages, buf);
485 return rc < 0 ? -ENOSYS : 0;
486 }
487
488 static void *diag204_store(void)
489 {
490 void *buf;
491 int pages, rc;
492
493 buf = diag204_get_buffer(diag204_info_type, &pages);
494 if (IS_ERR(buf))
495 goto out;
496 rc = diag204_do_store(buf, pages);
497 if (rc)
498 return ERR_PTR(rc);
499 out:
500 return buf;
501 }
502
503 /* Diagnose 224 functions */
504
505 static int diag224(void *ptr)
506 {
507 int rc = -EOPNOTSUPP;
508
509 asm volatile(
510 " diag %1,%2,0x224\n"
511 "0: lhi %0,0x0\n"
512 "1:\n"
513 EX_TABLE(0b,1b)
514 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
515 return rc;
516 }
517
518 static int diag224_get_name_table(void)
519 {
520 /* memory must be below 2GB */
521 diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);
522 if (!diag224_cpu_names)
523 return -ENOMEM;
524 if (diag224(diag224_cpu_names)) {
525 kfree(diag224_cpu_names);
526 return -EOPNOTSUPP;
527 }
528 EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16);
529 return 0;
530 }
531
532 static void diag224_delete_name_table(void)
533 {
534 kfree(diag224_cpu_names);
535 }
536
537 static int diag224_idx2name(int index, char *name)
538 {
539 memcpy(name, diag224_cpu_names + ((index + 1) * CPU_NAME_LEN),
540 CPU_NAME_LEN);
541 name[CPU_NAME_LEN] = 0;
542 strim(name);
543 return 0;
544 }
545
546 struct dbfs_d204_hdr {
547 u64 len; /* Length of d204 buffer without header */
548 u16 version; /* Version of header */
549 u8 sc; /* Used subcode */
550 char reserved[53];
551 } __attribute__ ((packed));
552
553 struct dbfs_d204 {
554 struct dbfs_d204_hdr hdr; /* 64 byte header */
555 char buf[]; /* d204 buffer */
556 } __attribute__ ((packed));
557
558 static int dbfs_d204_create(void **data, void **data_free_ptr, size_t *size)
559 {
560 struct dbfs_d204 *d204;
561 int rc, buf_size;
562 void *base;
563
564 buf_size = PAGE_SIZE * (diag204_buf_pages + 1) + sizeof(d204->hdr);
565 base = vzalloc(buf_size);
566 if (!base)
567 return -ENOMEM;
568 d204 = page_align_ptr(base + sizeof(d204->hdr)) - sizeof(d204->hdr);
569 rc = diag204_do_store(d204->buf, diag204_buf_pages);
570 if (rc) {
571 vfree(base);
572 return rc;
573 }
574 d204->hdr.version = DBFS_D204_HDR_VERSION;
575 d204->hdr.len = PAGE_SIZE * diag204_buf_pages;
576 d204->hdr.sc = diag204_store_sc;
577 *data = d204;
578 *data_free_ptr = base;
579 *size = d204->hdr.len + sizeof(struct dbfs_d204_hdr);
580 return 0;
581 }
582
583 static struct hypfs_dbfs_file dbfs_file_d204 = {
584 .name = "diag_204",
585 .data_create = dbfs_d204_create,
586 .data_free = vfree,
587 };
588
589 __init int hypfs_diag_init(void)
590 {
591 int rc;
592
593 if (diag204_probe()) {
594 pr_err("The hardware system does not support hypfs\n");
595 return -ENODATA;
596 }
597 if (diag204_info_type == INFO_EXT) {
598 rc = hypfs_dbfs_create_file(&dbfs_file_d204);
599 if (rc)
600 return rc;
601 }
602 if (MACHINE_IS_LPAR) {
603 rc = diag224_get_name_table();
604 if (rc) {
605 pr_err("The hardware system does not provide all "
606 "functions required by hypfs\n");
607 debugfs_remove(dbfs_d204_file);
608 return rc;
609 }
610 }
611 return 0;
612 }
613
614 void hypfs_diag_exit(void)
615 {
616 debugfs_remove(dbfs_d204_file);
617 diag224_delete_name_table();
618 diag204_free_buffer();
619 hypfs_dbfs_remove_file(&dbfs_file_d204);
620 }
621
622 /*
623 * Functions to create the directory structure
624 * *******************************************
625 */
626
627 static int hypfs_create_cpu_files(struct super_block *sb,
628 struct dentry *cpus_dir, void *cpu_info)
629 {
630 struct dentry *cpu_dir;
631 char buffer[TMP_SIZE];
632 void *rc;
633
634 snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_info_type,
635 cpu_info));
636 cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer);
637 rc = hypfs_create_u64(sb, cpu_dir, "mgmtime",
638 cpu_info__acc_time(diag204_info_type, cpu_info) -
639 cpu_info__lp_time(diag204_info_type, cpu_info));
640 if (IS_ERR(rc))
641 return PTR_ERR(rc);
642 rc = hypfs_create_u64(sb, cpu_dir, "cputime",
643 cpu_info__lp_time(diag204_info_type, cpu_info));
644 if (IS_ERR(rc))
645 return PTR_ERR(rc);
646 if (diag204_info_type == INFO_EXT) {
647 rc = hypfs_create_u64(sb, cpu_dir, "onlinetime",
648 cpu_info__online_time(diag204_info_type,
649 cpu_info));
650 if (IS_ERR(rc))
651 return PTR_ERR(rc);
652 }
653 diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer);
654 rc = hypfs_create_str(sb, cpu_dir, "type", buffer);
655 if (IS_ERR(rc))
656 return PTR_ERR(rc);
657 return 0;
658 }
659
660 static void *hypfs_create_lpar_files(struct super_block *sb,
661 struct dentry *systems_dir, void *part_hdr)
662 {
663 struct dentry *cpus_dir;
664 struct dentry *lpar_dir;
665 char lpar_name[LPAR_NAME_LEN + 1];
666 void *cpu_info;
667 int i;
668
669 part_hdr__part_name(diag204_info_type, part_hdr, lpar_name);
670 lpar_name[LPAR_NAME_LEN] = 0;
671 lpar_dir = hypfs_mkdir(sb, systems_dir, lpar_name);
672 if (IS_ERR(lpar_dir))
673 return lpar_dir;
674 cpus_dir = hypfs_mkdir(sb, lpar_dir, "cpus");
675 if (IS_ERR(cpus_dir))
676 return cpus_dir;
677 cpu_info = part_hdr + part_hdr__size(diag204_info_type);
678 for (i = 0; i < part_hdr__rcpus(diag204_info_type, part_hdr); i++) {
679 int rc;
680 rc = hypfs_create_cpu_files(sb, cpus_dir, cpu_info);
681 if (rc)
682 return ERR_PTR(rc);
683 cpu_info += cpu_info__size(diag204_info_type);
684 }
685 return cpu_info;
686 }
687
688 static int hypfs_create_phys_cpu_files(struct super_block *sb,
689 struct dentry *cpus_dir, void *cpu_info)
690 {
691 struct dentry *cpu_dir;
692 char buffer[TMP_SIZE];
693 void *rc;
694
695 snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type,
696 cpu_info));
697 cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer);
698 if (IS_ERR(cpu_dir))
699 return PTR_ERR(cpu_dir);
700 rc = hypfs_create_u64(sb, cpu_dir, "mgmtime",
701 phys_cpu__mgm_time(diag204_info_type, cpu_info));
702 if (IS_ERR(rc))
703 return PTR_ERR(rc);
704 diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer);
705 rc = hypfs_create_str(sb, cpu_dir, "type", buffer);
706 if (IS_ERR(rc))
707 return PTR_ERR(rc);
708 return 0;
709 }
710
711 static void *hypfs_create_phys_files(struct super_block *sb,
712 struct dentry *parent_dir, void *phys_hdr)
713 {
714 int i;
715 void *cpu_info;
716 struct dentry *cpus_dir;
717
718 cpus_dir = hypfs_mkdir(sb, parent_dir, "cpus");
719 if (IS_ERR(cpus_dir))
720 return cpus_dir;
721 cpu_info = phys_hdr + phys_hdr__size(diag204_info_type);
722 for (i = 0; i < phys_hdr__cpus(diag204_info_type, phys_hdr); i++) {
723 int rc;
724 rc = hypfs_create_phys_cpu_files(sb, cpus_dir, cpu_info);
725 if (rc)
726 return ERR_PTR(rc);
727 cpu_info += phys_cpu__size(diag204_info_type);
728 }
729 return cpu_info;
730 }
731
732 int hypfs_diag_create_files(struct super_block *sb, struct dentry *root)
733 {
734 struct dentry *systems_dir, *hyp_dir;
735 void *time_hdr, *part_hdr;
736 int i, rc;
737 void *buffer, *ptr;
738
739 buffer = diag204_store();
740 if (IS_ERR(buffer))
741 return PTR_ERR(buffer);
742
743 systems_dir = hypfs_mkdir(sb, root, "systems");
744 if (IS_ERR(systems_dir)) {
745 rc = PTR_ERR(systems_dir);
746 goto err_out;
747 }
748 time_hdr = (struct x_info_blk_hdr *)buffer;
749 part_hdr = time_hdr + info_blk_hdr__size(diag204_info_type);
750 for (i = 0; i < info_blk_hdr__npar(diag204_info_type, time_hdr); i++) {
751 part_hdr = hypfs_create_lpar_files(sb, systems_dir, part_hdr);
752 if (IS_ERR(part_hdr)) {
753 rc = PTR_ERR(part_hdr);
754 goto err_out;
755 }
756 }
757 if (info_blk_hdr__flags(diag204_info_type, time_hdr) & LPAR_PHYS_FLG) {
758 ptr = hypfs_create_phys_files(sb, root, part_hdr);
759 if (IS_ERR(ptr)) {
760 rc = PTR_ERR(ptr);
761 goto err_out;
762 }
763 }
764 hyp_dir = hypfs_mkdir(sb, root, "hyp");
765 if (IS_ERR(hyp_dir)) {
766 rc = PTR_ERR(hyp_dir);
767 goto err_out;
768 }
769 ptr = hypfs_create_str(sb, hyp_dir, "type", "LPAR Hypervisor");
770 if (IS_ERR(ptr)) {
771 rc = PTR_ERR(ptr);
772 goto err_out;
773 }
774 rc = 0;
775
776 err_out:
777 return rc;
778 }
Linus' kernel tree