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[net-next-2.6.git] / arch / s390 / hypfs / hypfs_diag.c
CommitLineData
24bbb1fa 1/*
f19bfb2c 2 * arch/s390/hypfs/hypfs_diag.c
24bbb1fa
MH		 3 * Hypervisor filesystem for Linux on s390. Diag 204 and 224
4 * implementation.
5 *
f55495ba 6 * Copyright IBM Corp. 2006, 2008
24bbb1fa
MH		 7 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
8 */
9
f55495ba
MH		 10#define KMSG_COMPONENT "hypfs"
11#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
24bbb1fa
MH		 13#include <linux/types.h>
14#include <linux/errno.h>
33b26d79 15#include <linux/slab.h>
24bbb1fa
MH		 16#include <linux/string.h>
17#include <linux/vmalloc.h>
57b28f66 18#include <linux/mm.h>
24bbb1fa
MH		 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
57b28f66
MH		 26#define DBFS_D204_HDR_VERSION 0
27
24bbb1fa
MH		 28/* diag 204 subcodes */
29enum 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 */
37enum 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
45static char *diag224_cpu_names; /* diag 224 name table */
46static enum diag204_sc diag204_store_sc; /* used subcode for store */
47static enum diag204_format diag204_info_type; /* used diag 204 data format */
48
49static void *diag204_buf; /* 4K aligned buffer for diag204 data */
50static void *diag204_buf_vmalloc; /* vmalloc pointer for diag204 data */
51static int diag204_buf_pages; /* number of pages for diag204 data */
52
57b28f66
MH		 53static struct dentry *dbfs_d204_file;
54
24bbb1fa
MH		 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
65struct 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
74struct 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
85static 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
93static 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
101static 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
109static 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
119struct part_hdr {
120 __u8 pn;
121 __u8 cpus;
122 char reserved[6];
123 char part_name[LPAR_NAME_LEN];
124} __attribute__ ((packed));
125
126struct 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
144static 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
152static 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
160static 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;
1d802e24 171 strim(name);
24bbb1fa
MH		 172}
173
174struct 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
184struct 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
205static 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
213static 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
221static 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
229static 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
237static 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
245static 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
255struct phys_hdr {
256 char reserved1[1];
257 __u8 cpus;
258 char reserved2[6];
259 char mgm_name[8];
260} __attribute__ ((packed));
261
262struct 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
270static 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
278static 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
288struct 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
297struct 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
306static 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
314static 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
322static 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
330static 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
340static 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
94c12cc7
MS		 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");
24bbb1fa
MH		 350 if (_subcode)
351 return -1;
94c12cc7 352 return _size;
24bbb1fa
MH		 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
362static 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 }
24bbb1fa
MH		 372 diag204_buf = NULL;
373}
374
57b28f66
MH		 375static void *page_align_ptr(void *ptr)
376{
377 return (void *) PAGE_ALIGN((unsigned long) ptr);
378}
379
24bbb1fa
MH		 380static 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);
57b28f66 386 diag204_buf = page_align_ptr(diag204_buf_vmalloc);
24bbb1fa
MH		 387 diag204_buf_pages = pages;
388 return diag204_buf;
389}
390
391static void *diag204_alloc_rbuf(void)
392{
393 diag204_buf = (void*)__get_free_pages(GFP_KERNEL,0);
86b22470 394 if (!diag204_buf)
24bbb1fa
MH		 395 return ERR_PTR(-ENOMEM);
396 diag204_buf_pages = 1;
397 return diag204_buf;
398}
399
400static 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 */
23c100d9
MH		 410 *pages = diag204((unsigned long)SUBC_RSI |
411 (unsigned long)INFO_EXT, 0, NULL);
24bbb1fa
MH		 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
433static 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)) {
331c982d
MH		 440 if (diag204((unsigned long)SUBC_STIB7 |
441 (unsigned long)INFO_EXT, pages, buf) >= 0) {
24bbb1fa
MH		 442 diag204_store_sc = SUBC_STIB7;
443 diag204_info_type = INFO_EXT;
444 goto out;
445 }
331c982d
MH		 446 if (diag204((unsigned long)SUBC_STIB6 |
447 (unsigned long)INFO_EXT, pages, buf) >= 0) {
7874b1b6 448 diag204_store_sc = SUBC_STIB6;
24bbb1fa
MH		 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 }
331c982d
MH		 462 if (diag204((unsigned long)SUBC_STIB4 |
463 (unsigned long)INFO_SIMPLE, pages, buf) >= 0) {
24bbb1fa
MH		 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 }
471out:
472 rc = 0;
473fail_store:
474 diag204_free_buffer();
475fail_alloc:
476 return rc;
477}
478
57b28f66
MH		 479static 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
24bbb1fa
MH		 488static void *diag204_store(void)
489{
490 void *buf;
57b28f66 491 int pages, rc;
24bbb1fa
MH		 492
493 buf = diag204_get_buffer(diag204_info_type, &pages);
494 if (IS_ERR(buf))
495 goto out;
57b28f66
MH		 496 rc = diag204_do_store(buf, pages);
497 if (rc)
498 return ERR_PTR(rc);
24bbb1fa
MH		 499out:
500 return buf;
501}
502
503/* Diagnose 224 functions */
504
c41d4e3e 505static int diag224(void *ptr)
24bbb1fa 506{
b8e660b8 507 int rc = -EOPNOTSUPP;
c41d4e3e
MH		 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;
24bbb1fa
MH		 516}
517
518static 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;
c41d4e3e
MH		 524 if (diag224(diag224_cpu_names)) {
525 kfree(diag224_cpu_names);
b8e660b8 526 return -EOPNOTSUPP;
c41d4e3e 527 }
24bbb1fa
MH		 528 EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16);
529 return 0;
530}
531
532static void diag224_delete_name_table(void)
533{
534 kfree(diag224_cpu_names);
535}
536
537static 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;
1d802e24 542 strim(name);
24bbb1fa
MH		 543 return 0;
544}
545
57b28f66
MH		 546struct 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
553struct dbfs_d204 {
554 struct dbfs_d204_hdr hdr; /* 64 byte header */
555 char buf[]; /* d204 buffer */
556} __attribute__ ((packed));
557
558struct dbfs_d204_private {
559 struct dbfs_d204 *d204; /* Aligned d204 data with header */
560 void *base; /* Base pointer (needed for vfree) */
561};
562
563static int dbfs_d204_open(struct inode *inode, struct file *file)
564{
565 struct dbfs_d204_private *data;
566 struct dbfs_d204 *d204;
567 int rc, buf_size;
568
569 data = kzalloc(sizeof(*data), GFP_KERNEL);
570 if (!data)
571 return -ENOMEM;
572 buf_size = PAGE_SIZE * (diag204_buf_pages + 1) + sizeof(d204->hdr);
573 data->base = vmalloc(buf_size);
574 if (!data->base) {
575 rc = -ENOMEM;
576 goto fail_kfree_data;
577 }
578 memset(data->base, 0, buf_size);
579 d204 = page_align_ptr(data->base + sizeof(d204->hdr))
580 - sizeof(d204->hdr);
581 rc = diag204_do_store(&d204->buf, diag204_buf_pages);
582 if (rc)
583 goto fail_vfree_base;
584 d204->hdr.version = DBFS_D204_HDR_VERSION;
585 d204->hdr.len = PAGE_SIZE * diag204_buf_pages;
586 d204->hdr.sc = diag204_store_sc;
587 data->d204 = d204;
588 file->private_data = data;
589 return nonseekable_open(inode, file);
590
591fail_vfree_base:
592 vfree(data->base);
593fail_kfree_data:
594 kfree(data);
595 return rc;
596}
597
598static int dbfs_d204_release(struct inode *inode, struct file *file)
599{
600 struct dbfs_d204_private *data = file->private_data;
601
602 vfree(data->base);
603 kfree(data);
604 return 0;
605}
606
607static ssize_t dbfs_d204_read(struct file *file, char __user *buf,
608 size_t size, loff_t *ppos)
609{
610 struct dbfs_d204_private *data = file->private_data;
611
612 return simple_read_from_buffer(buf, size, ppos, data->d204,
613 data->d204->hdr.len +
614 sizeof(data->d204->hdr));
615}
616
617static const struct file_operations dbfs_d204_ops = {
618 .open = dbfs_d204_open,
619 .read = dbfs_d204_read,
620 .release = dbfs_d204_release,
6038f373 621 .llseek = no_llseek,
57b28f66
MH		 622};
623
624static int hypfs_dbfs_init(void)
625{
626 dbfs_d204_file = debugfs_create_file("diag_204", 0400, hypfs_dbfs_dir,
627 NULL, &dbfs_d204_ops);
628 if (IS_ERR(dbfs_d204_file))
629 return PTR_ERR(dbfs_d204_file);
630 return 0;
631}
632
24bbb1fa
MH		 633__init int hypfs_diag_init(void)
634{
635 int rc;
636
637 if (diag204_probe()) {
f55495ba 638 pr_err("The hardware system does not support hypfs\n");
24bbb1fa
MH		 639 return -ENODATA;
640 }
57b28f66
MH		 641 if (diag204_info_type == INFO_EXT) {
642 rc = hypfs_dbfs_init();
643 if (rc)
3c8ebca0 644 return rc;
57b28f66 645 }
3c8ebca0
MH		 646 if (MACHINE_IS_LPAR) {
647 rc = diag224_get_name_table();
648 if (rc) {
649 pr_err("The hardware system does not provide all "
650 "functions required by hypfs\n");
651 debugfs_remove(dbfs_d204_file);
652 return rc;
653 }
654 }
655 return 0;
24bbb1fa
MH		 656}
657
1375fc1f 658void hypfs_diag_exit(void)
24bbb1fa 659{
57b28f66 660 debugfs_remove(dbfs_d204_file);
24bbb1fa
MH		 661 diag224_delete_name_table();
662 diag204_free_buffer();
663}
664
665/*
666 * Functions to create the directory structure
667 * *******************************************
668 */
669
670static int hypfs_create_cpu_files(struct super_block *sb,
671 struct dentry *cpus_dir, void *cpu_info)
672{
673 struct dentry *cpu_dir;
674 char buffer[TMP_SIZE];
675 void *rc;
676
677 snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_info_type,
678 cpu_info));
679 cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer);
680 rc = hypfs_create_u64(sb, cpu_dir, "mgmtime",
681 cpu_info__acc_time(diag204_info_type, cpu_info) -
682 cpu_info__lp_time(diag204_info_type, cpu_info));
683 if (IS_ERR(rc))
684 return PTR_ERR(rc);
685 rc = hypfs_create_u64(sb, cpu_dir, "cputime",
686 cpu_info__lp_time(diag204_info_type, cpu_info));
687 if (IS_ERR(rc))
688 return PTR_ERR(rc);
689 if (diag204_info_type == INFO_EXT) {
690 rc = hypfs_create_u64(sb, cpu_dir, "onlinetime",
691 cpu_info__online_time(diag204_info_type,
692 cpu_info));
693 if (IS_ERR(rc))
694 return PTR_ERR(rc);
695 }
696 diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer);
697 rc = hypfs_create_str(sb, cpu_dir, "type", buffer);
698 if (IS_ERR(rc))
699 return PTR_ERR(rc);
700 return 0;
701}
702
703static void *hypfs_create_lpar_files(struct super_block *sb,
704 struct dentry *systems_dir, void *part_hdr)
705{
706 struct dentry *cpus_dir;
707 struct dentry *lpar_dir;
708 char lpar_name[LPAR_NAME_LEN + 1];
709 void *cpu_info;
710 int i;
711
712 part_hdr__part_name(diag204_info_type, part_hdr, lpar_name);
713 lpar_name[LPAR_NAME_LEN] = 0;
714 lpar_dir = hypfs_mkdir(sb, systems_dir, lpar_name);
715 if (IS_ERR(lpar_dir))
716 return lpar_dir;
717 cpus_dir = hypfs_mkdir(sb, lpar_dir, "cpus");
718 if (IS_ERR(cpus_dir))
719 return cpus_dir;
720 cpu_info = part_hdr + part_hdr__size(diag204_info_type);
721 for (i = 0; i < part_hdr__rcpus(diag204_info_type, part_hdr); i++) {
722 int rc;
723 rc = hypfs_create_cpu_files(sb, cpus_dir, cpu_info);
724 if (rc)
725 return ERR_PTR(rc);
726 cpu_info += cpu_info__size(diag204_info_type);
727 }
728 return cpu_info;
729}
730
731static int hypfs_create_phys_cpu_files(struct super_block *sb,
732 struct dentry *cpus_dir, void *cpu_info)
733{
734 struct dentry *cpu_dir;
735 char buffer[TMP_SIZE];
736 void *rc;
737
738 snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type,
739 cpu_info));
740 cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer);
741 if (IS_ERR(cpu_dir))
742 return PTR_ERR(cpu_dir);
743 rc = hypfs_create_u64(sb, cpu_dir, "mgmtime",
744 phys_cpu__mgm_time(diag204_info_type, cpu_info));
745 if (IS_ERR(rc))
746 return PTR_ERR(rc);
747 diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer);
748 rc = hypfs_create_str(sb, cpu_dir, "type", buffer);
749 if (IS_ERR(rc))
750 return PTR_ERR(rc);
751 return 0;
752}
753
754static void *hypfs_create_phys_files(struct super_block *sb,
755 struct dentry *parent_dir, void *phys_hdr)
756{
757 int i;
758 void *cpu_info;
759 struct dentry *cpus_dir;
760
761 cpus_dir = hypfs_mkdir(sb, parent_dir, "cpus");
762 if (IS_ERR(cpus_dir))
763 return cpus_dir;
764 cpu_info = phys_hdr + phys_hdr__size(diag204_info_type);
765 for (i = 0; i < phys_hdr__cpus(diag204_info_type, phys_hdr); i++) {
766 int rc;
767 rc = hypfs_create_phys_cpu_files(sb, cpus_dir, cpu_info);
768 if (rc)
769 return ERR_PTR(rc);
770 cpu_info += phys_cpu__size(diag204_info_type);
771 }
772 return cpu_info;
773}
774
775int hypfs_diag_create_files(struct super_block *sb, struct dentry *root)
776{
777 struct dentry *systems_dir, *hyp_dir;
778 void *time_hdr, *part_hdr;
779 int i, rc;
780 void *buffer, *ptr;
781
782 buffer = diag204_store();
783 if (IS_ERR(buffer))
784 return PTR_ERR(buffer);
785
786 systems_dir = hypfs_mkdir(sb, root, "systems");
787 if (IS_ERR(systems_dir)) {
788 rc = PTR_ERR(systems_dir);
789 goto err_out;
790 }
791 time_hdr = (struct x_info_blk_hdr *)buffer;
792 part_hdr = time_hdr + info_blk_hdr__size(diag204_info_type);
793 for (i = 0; i < info_blk_hdr__npar(diag204_info_type, time_hdr); i++) {
794 part_hdr = hypfs_create_lpar_files(sb, systems_dir, part_hdr);
795 if (IS_ERR(part_hdr)) {
796 rc = PTR_ERR(part_hdr);
797 goto err_out;
798 }
799 }
800 if (info_blk_hdr__flags(diag204_info_type, time_hdr) & LPAR_PHYS_FLG) {
801 ptr = hypfs_create_phys_files(sb, root, part_hdr);
802 if (IS_ERR(ptr)) {
803 rc = PTR_ERR(ptr);
804 goto err_out;
805 }
806 }
807 hyp_dir = hypfs_mkdir(sb, root, "hyp");
808 if (IS_ERR(hyp_dir)) {
809 rc = PTR_ERR(hyp_dir);
810 goto err_out;
811 }
812 ptr = hypfs_create_str(sb, hyp_dir, "type", "LPAR Hypervisor");
813 if (IS_ERR(ptr)) {
814 rc = PTR_ERR(ptr);
815 goto err_out;
816 }
817 rc = 0;
818
819err_out:
820 return rc;
821}
Clone of davem's net-next-2.6 tree