Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 1 | /* |
Michael Holzheu | f19bfb2 | 2006-09-20 15:58:44 +0200 | [diff] [blame] | 2 | * arch/s390/hypfs/hypfs_diag.c |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 3 | * Hypervisor filesystem for Linux on s390. Diag 204 and 224 |
| 4 | * implementation. |
| 5 | * |
Michael Holzheu | f55495b | 2008-12-25 13:39:39 +0100 | [diff] [blame] | 6 | * Copyright IBM Corp. 2006, 2008 |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 7 | * Author(s): Michael Holzheu <holzheu@de.ibm.com> |
| 8 | */ |
| 9 | |
Michael Holzheu | f55495b | 2008-12-25 13:39:39 +0100 | [diff] [blame] | 10 | #define KMSG_COMPONENT "hypfs" |
| 11 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
| 12 | |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 13 | #include <linux/types.h> |
| 14 | #include <linux/errno.h> |
Heiko Carstens | 33b26d7 | 2009-03-31 19:16:02 +0200 | [diff] [blame] | 15 | #include <linux/gfp.h> |
| 16 | #include <linux/slab.h> |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 17 | #include <linux/string.h> |
| 18 | #include <linux/vmalloc.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 | /* diag 204 subcodes */ |
| 27 | enum diag204_sc { |
| 28 | SUBC_STIB4 = 4, |
| 29 | SUBC_RSI = 5, |
| 30 | SUBC_STIB6 = 6, |
| 31 | SUBC_STIB7 = 7 |
| 32 | }; |
| 33 | |
| 34 | /* The two available diag 204 data formats */ |
| 35 | enum diag204_format { |
| 36 | INFO_SIMPLE = 0, |
| 37 | INFO_EXT = 0x00010000 |
| 38 | }; |
| 39 | |
| 40 | /* bit is set in flags, when physical cpu info is included in diag 204 data */ |
| 41 | #define LPAR_PHYS_FLG 0x80 |
| 42 | |
| 43 | static char *diag224_cpu_names; /* diag 224 name table */ |
| 44 | static enum diag204_sc diag204_store_sc; /* used subcode for store */ |
| 45 | static enum diag204_format diag204_info_type; /* used diag 204 data format */ |
| 46 | |
| 47 | static void *diag204_buf; /* 4K aligned buffer for diag204 data */ |
| 48 | static void *diag204_buf_vmalloc; /* vmalloc pointer for diag204 data */ |
| 49 | static int diag204_buf_pages; /* number of pages for diag204 data */ |
| 50 | |
| 51 | /* |
| 52 | * DIAG 204 data structures and member access functions. |
| 53 | * |
| 54 | * Since we have two different diag 204 data formats for old and new s390 |
| 55 | * machines, we do not access the structs directly, but use getter functions for |
| 56 | * each struct member instead. This should make the code more readable. |
| 57 | */ |
| 58 | |
| 59 | /* Time information block */ |
| 60 | |
| 61 | struct info_blk_hdr { |
| 62 | __u8 npar; |
| 63 | __u8 flags; |
| 64 | __u16 tslice; |
| 65 | __u16 phys_cpus; |
| 66 | __u16 this_part; |
| 67 | __u64 curtod; |
| 68 | } __attribute__ ((packed)); |
| 69 | |
| 70 | struct x_info_blk_hdr { |
| 71 | __u8 npar; |
| 72 | __u8 flags; |
| 73 | __u16 tslice; |
| 74 | __u16 phys_cpus; |
| 75 | __u16 this_part; |
| 76 | __u64 curtod1; |
| 77 | __u64 curtod2; |
| 78 | char reserved[40]; |
| 79 | } __attribute__ ((packed)); |
| 80 | |
| 81 | static inline int info_blk_hdr__size(enum diag204_format type) |
| 82 | { |
| 83 | if (type == INFO_SIMPLE) |
| 84 | return sizeof(struct info_blk_hdr); |
| 85 | else /* INFO_EXT */ |
| 86 | return sizeof(struct x_info_blk_hdr); |
| 87 | } |
| 88 | |
| 89 | static inline __u8 info_blk_hdr__npar(enum diag204_format type, void *hdr) |
| 90 | { |
| 91 | if (type == INFO_SIMPLE) |
| 92 | return ((struct info_blk_hdr *)hdr)->npar; |
| 93 | else /* INFO_EXT */ |
| 94 | return ((struct x_info_blk_hdr *)hdr)->npar; |
| 95 | } |
| 96 | |
| 97 | static inline __u8 info_blk_hdr__flags(enum diag204_format type, void *hdr) |
| 98 | { |
| 99 | if (type == INFO_SIMPLE) |
| 100 | return ((struct info_blk_hdr *)hdr)->flags; |
| 101 | else /* INFO_EXT */ |
| 102 | return ((struct x_info_blk_hdr *)hdr)->flags; |
| 103 | } |
| 104 | |
| 105 | static inline __u16 info_blk_hdr__pcpus(enum diag204_format type, void *hdr) |
| 106 | { |
| 107 | if (type == INFO_SIMPLE) |
| 108 | return ((struct info_blk_hdr *)hdr)->phys_cpus; |
| 109 | else /* INFO_EXT */ |
| 110 | return ((struct x_info_blk_hdr *)hdr)->phys_cpus; |
| 111 | } |
| 112 | |
| 113 | /* Partition header */ |
| 114 | |
| 115 | struct part_hdr { |
| 116 | __u8 pn; |
| 117 | __u8 cpus; |
| 118 | char reserved[6]; |
| 119 | char part_name[LPAR_NAME_LEN]; |
| 120 | } __attribute__ ((packed)); |
| 121 | |
| 122 | struct x_part_hdr { |
| 123 | __u8 pn; |
| 124 | __u8 cpus; |
| 125 | __u8 rcpus; |
| 126 | __u8 pflag; |
| 127 | __u32 mlu; |
| 128 | char part_name[LPAR_NAME_LEN]; |
| 129 | char lpc_name[8]; |
| 130 | char os_name[8]; |
| 131 | __u64 online_cs; |
| 132 | __u64 online_es; |
| 133 | __u8 upid; |
| 134 | char reserved1[3]; |
| 135 | __u32 group_mlu; |
| 136 | char group_name[8]; |
| 137 | char reserved2[32]; |
| 138 | } __attribute__ ((packed)); |
| 139 | |
| 140 | static inline int part_hdr__size(enum diag204_format type) |
| 141 | { |
| 142 | if (type == INFO_SIMPLE) |
| 143 | return sizeof(struct part_hdr); |
| 144 | else /* INFO_EXT */ |
| 145 | return sizeof(struct x_part_hdr); |
| 146 | } |
| 147 | |
| 148 | static inline __u8 part_hdr__rcpus(enum diag204_format type, void *hdr) |
| 149 | { |
| 150 | if (type == INFO_SIMPLE) |
| 151 | return ((struct part_hdr *)hdr)->cpus; |
| 152 | else /* INFO_EXT */ |
| 153 | return ((struct x_part_hdr *)hdr)->rcpus; |
| 154 | } |
| 155 | |
| 156 | static inline void part_hdr__part_name(enum diag204_format type, void *hdr, |
| 157 | char *name) |
| 158 | { |
| 159 | if (type == INFO_SIMPLE) |
| 160 | memcpy(name, ((struct part_hdr *)hdr)->part_name, |
| 161 | LPAR_NAME_LEN); |
| 162 | else /* INFO_EXT */ |
| 163 | memcpy(name, ((struct x_part_hdr *)hdr)->part_name, |
| 164 | LPAR_NAME_LEN); |
| 165 | EBCASC(name, LPAR_NAME_LEN); |
| 166 | name[LPAR_NAME_LEN] = 0; |
Heiko Carstens | 1d802e2 | 2009-12-18 17:43:27 +0100 | [diff] [blame^] | 167 | strim(name); |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | struct cpu_info { |
| 171 | __u16 cpu_addr; |
| 172 | char reserved1[2]; |
| 173 | __u8 ctidx; |
| 174 | __u8 cflag; |
| 175 | __u16 weight; |
| 176 | __u64 acc_time; |
| 177 | __u64 lp_time; |
| 178 | } __attribute__ ((packed)); |
| 179 | |
| 180 | struct x_cpu_info { |
| 181 | __u16 cpu_addr; |
| 182 | char reserved1[2]; |
| 183 | __u8 ctidx; |
| 184 | __u8 cflag; |
| 185 | __u16 weight; |
| 186 | __u64 acc_time; |
| 187 | __u64 lp_time; |
| 188 | __u16 min_weight; |
| 189 | __u16 cur_weight; |
| 190 | __u16 max_weight; |
| 191 | char reseved2[2]; |
| 192 | __u64 online_time; |
| 193 | __u64 wait_time; |
| 194 | __u32 pma_weight; |
| 195 | __u32 polar_weight; |
| 196 | char reserved3[40]; |
| 197 | } __attribute__ ((packed)); |
| 198 | |
| 199 | /* CPU info block */ |
| 200 | |
| 201 | static inline int cpu_info__size(enum diag204_format type) |
| 202 | { |
| 203 | if (type == INFO_SIMPLE) |
| 204 | return sizeof(struct cpu_info); |
| 205 | else /* INFO_EXT */ |
| 206 | return sizeof(struct x_cpu_info); |
| 207 | } |
| 208 | |
| 209 | static inline __u8 cpu_info__ctidx(enum diag204_format type, void *hdr) |
| 210 | { |
| 211 | if (type == INFO_SIMPLE) |
| 212 | return ((struct cpu_info *)hdr)->ctidx; |
| 213 | else /* INFO_EXT */ |
| 214 | return ((struct x_cpu_info *)hdr)->ctidx; |
| 215 | } |
| 216 | |
| 217 | static inline __u16 cpu_info__cpu_addr(enum diag204_format type, void *hdr) |
| 218 | { |
| 219 | if (type == INFO_SIMPLE) |
| 220 | return ((struct cpu_info *)hdr)->cpu_addr; |
| 221 | else /* INFO_EXT */ |
| 222 | return ((struct x_cpu_info *)hdr)->cpu_addr; |
| 223 | } |
| 224 | |
| 225 | static inline __u64 cpu_info__acc_time(enum diag204_format type, void *hdr) |
| 226 | { |
| 227 | if (type == INFO_SIMPLE) |
| 228 | return ((struct cpu_info *)hdr)->acc_time; |
| 229 | else /* INFO_EXT */ |
| 230 | return ((struct x_cpu_info *)hdr)->acc_time; |
| 231 | } |
| 232 | |
| 233 | static inline __u64 cpu_info__lp_time(enum diag204_format type, void *hdr) |
| 234 | { |
| 235 | if (type == INFO_SIMPLE) |
| 236 | return ((struct cpu_info *)hdr)->lp_time; |
| 237 | else /* INFO_EXT */ |
| 238 | return ((struct x_cpu_info *)hdr)->lp_time; |
| 239 | } |
| 240 | |
| 241 | static inline __u64 cpu_info__online_time(enum diag204_format type, void *hdr) |
| 242 | { |
| 243 | if (type == INFO_SIMPLE) |
| 244 | return 0; /* online_time not available in simple info */ |
| 245 | else /* INFO_EXT */ |
| 246 | return ((struct x_cpu_info *)hdr)->online_time; |
| 247 | } |
| 248 | |
| 249 | /* Physical header */ |
| 250 | |
| 251 | struct phys_hdr { |
| 252 | char reserved1[1]; |
| 253 | __u8 cpus; |
| 254 | char reserved2[6]; |
| 255 | char mgm_name[8]; |
| 256 | } __attribute__ ((packed)); |
| 257 | |
| 258 | struct x_phys_hdr { |
| 259 | char reserved1[1]; |
| 260 | __u8 cpus; |
| 261 | char reserved2[6]; |
| 262 | char mgm_name[8]; |
| 263 | char reserved3[80]; |
| 264 | } __attribute__ ((packed)); |
| 265 | |
| 266 | static inline int phys_hdr__size(enum diag204_format type) |
| 267 | { |
| 268 | if (type == INFO_SIMPLE) |
| 269 | return sizeof(struct phys_hdr); |
| 270 | else /* INFO_EXT */ |
| 271 | return sizeof(struct x_phys_hdr); |
| 272 | } |
| 273 | |
| 274 | static inline __u8 phys_hdr__cpus(enum diag204_format type, void *hdr) |
| 275 | { |
| 276 | if (type == INFO_SIMPLE) |
| 277 | return ((struct phys_hdr *)hdr)->cpus; |
| 278 | else /* INFO_EXT */ |
| 279 | return ((struct x_phys_hdr *)hdr)->cpus; |
| 280 | } |
| 281 | |
| 282 | /* Physical CPU info block */ |
| 283 | |
| 284 | struct phys_cpu { |
| 285 | __u16 cpu_addr; |
| 286 | char reserved1[2]; |
| 287 | __u8 ctidx; |
| 288 | char reserved2[3]; |
| 289 | __u64 mgm_time; |
| 290 | char reserved3[8]; |
| 291 | } __attribute__ ((packed)); |
| 292 | |
| 293 | struct x_phys_cpu { |
| 294 | __u16 cpu_addr; |
| 295 | char reserved1[2]; |
| 296 | __u8 ctidx; |
| 297 | char reserved2[3]; |
| 298 | __u64 mgm_time; |
| 299 | char reserved3[80]; |
| 300 | } __attribute__ ((packed)); |
| 301 | |
| 302 | static inline int phys_cpu__size(enum diag204_format type) |
| 303 | { |
| 304 | if (type == INFO_SIMPLE) |
| 305 | return sizeof(struct phys_cpu); |
| 306 | else /* INFO_EXT */ |
| 307 | return sizeof(struct x_phys_cpu); |
| 308 | } |
| 309 | |
| 310 | static inline __u16 phys_cpu__cpu_addr(enum diag204_format type, void *hdr) |
| 311 | { |
| 312 | if (type == INFO_SIMPLE) |
| 313 | return ((struct phys_cpu *)hdr)->cpu_addr; |
| 314 | else /* INFO_EXT */ |
| 315 | return ((struct x_phys_cpu *)hdr)->cpu_addr; |
| 316 | } |
| 317 | |
| 318 | static inline __u64 phys_cpu__mgm_time(enum diag204_format type, void *hdr) |
| 319 | { |
| 320 | if (type == INFO_SIMPLE) |
| 321 | return ((struct phys_cpu *)hdr)->mgm_time; |
| 322 | else /* INFO_EXT */ |
| 323 | return ((struct x_phys_cpu *)hdr)->mgm_time; |
| 324 | } |
| 325 | |
| 326 | static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr) |
| 327 | { |
| 328 | if (type == INFO_SIMPLE) |
| 329 | return ((struct phys_cpu *)hdr)->ctidx; |
| 330 | else /* INFO_EXT */ |
| 331 | return ((struct x_phys_cpu *)hdr)->ctidx; |
| 332 | } |
| 333 | |
| 334 | /* Diagnose 204 functions */ |
| 335 | |
| 336 | static int diag204(unsigned long subcode, unsigned long size, void *addr) |
| 337 | { |
| 338 | register unsigned long _subcode asm("0") = subcode; |
| 339 | register unsigned long _size asm("1") = size; |
| 340 | |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 341 | asm volatile( |
| 342 | " diag %2,%0,0x204\n" |
| 343 | "0:\n" |
| 344 | EX_TABLE(0b,0b) |
| 345 | : "+d" (_subcode), "+d" (_size) : "d" (addr) : "memory"); |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 346 | if (_subcode) |
| 347 | return -1; |
Martin Schwidefsky | 94c12cc | 2006-09-28 16:56:43 +0200 | [diff] [blame] | 348 | return _size; |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | /* |
| 352 | * For the old diag subcode 4 with simple data format we have to use real |
| 353 | * memory. If we use subcode 6 or 7 with extended data format, we can (and |
| 354 | * should) use vmalloc, since we need a lot of memory in that case. Currently |
| 355 | * up to 93 pages! |
| 356 | */ |
| 357 | |
| 358 | static void diag204_free_buffer(void) |
| 359 | { |
| 360 | if (!diag204_buf) |
| 361 | return; |
| 362 | if (diag204_buf_vmalloc) { |
| 363 | vfree(diag204_buf_vmalloc); |
| 364 | diag204_buf_vmalloc = NULL; |
| 365 | } else { |
| 366 | free_pages((unsigned long) diag204_buf, 0); |
| 367 | } |
| 368 | diag204_buf_pages = 0; |
| 369 | diag204_buf = NULL; |
| 370 | } |
| 371 | |
| 372 | static void *diag204_alloc_vbuf(int pages) |
| 373 | { |
| 374 | /* The buffer has to be page aligned! */ |
| 375 | diag204_buf_vmalloc = vmalloc(PAGE_SIZE * (pages + 1)); |
| 376 | if (!diag204_buf_vmalloc) |
| 377 | return ERR_PTR(-ENOMEM); |
| 378 | diag204_buf = (void*)((unsigned long)diag204_buf_vmalloc |
| 379 | & ~0xfffUL) + 0x1000; |
| 380 | diag204_buf_pages = pages; |
| 381 | return diag204_buf; |
| 382 | } |
| 383 | |
| 384 | static void *diag204_alloc_rbuf(void) |
| 385 | { |
| 386 | diag204_buf = (void*)__get_free_pages(GFP_KERNEL,0); |
Christian Borntraeger | 86b2247 | 2006-12-15 17:18:10 +0100 | [diff] [blame] | 387 | if (!diag204_buf) |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 388 | return ERR_PTR(-ENOMEM); |
| 389 | diag204_buf_pages = 1; |
| 390 | return diag204_buf; |
| 391 | } |
| 392 | |
| 393 | static void *diag204_get_buffer(enum diag204_format fmt, int *pages) |
| 394 | { |
| 395 | if (diag204_buf) { |
| 396 | *pages = diag204_buf_pages; |
| 397 | return diag204_buf; |
| 398 | } |
| 399 | if (fmt == INFO_SIMPLE) { |
| 400 | *pages = 1; |
| 401 | return diag204_alloc_rbuf(); |
| 402 | } else {/* INFO_EXT */ |
Michael Holzheu | 23c100d | 2006-09-28 16:55:28 +0200 | [diff] [blame] | 403 | *pages = diag204((unsigned long)SUBC_RSI | |
| 404 | (unsigned long)INFO_EXT, 0, NULL); |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 405 | if (*pages <= 0) |
| 406 | return ERR_PTR(-ENOSYS); |
| 407 | else |
| 408 | return diag204_alloc_vbuf(*pages); |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | /* |
| 413 | * diag204_probe() has to find out, which type of diagnose 204 implementation |
| 414 | * we have on our machine. Currently there are three possible scanarios: |
| 415 | * - subcode 4 + simple data format (only one page) |
| 416 | * - subcode 4-6 + extended data format |
| 417 | * - subcode 4-7 + extended data format |
| 418 | * |
| 419 | * Subcode 5 is used to retrieve the size of the data, provided by subcodes |
| 420 | * 6 and 7. Subcode 7 basically has the same function as subcode 6. In addition |
| 421 | * to subcode 6 it provides also information about secondary cpus. |
| 422 | * In order to get as much information as possible, we first try |
| 423 | * subcode 7, then 6 and if both fail, we use subcode 4. |
| 424 | */ |
| 425 | |
| 426 | static int diag204_probe(void) |
| 427 | { |
| 428 | void *buf; |
| 429 | int pages, rc; |
| 430 | |
| 431 | buf = diag204_get_buffer(INFO_EXT, &pages); |
| 432 | if (!IS_ERR(buf)) { |
Michael Holzheu | 331c982 | 2006-09-20 15:58:47 +0200 | [diff] [blame] | 433 | if (diag204((unsigned long)SUBC_STIB7 | |
| 434 | (unsigned long)INFO_EXT, pages, buf) >= 0) { |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 435 | diag204_store_sc = SUBC_STIB7; |
| 436 | diag204_info_type = INFO_EXT; |
| 437 | goto out; |
| 438 | } |
Michael Holzheu | 331c982 | 2006-09-20 15:58:47 +0200 | [diff] [blame] | 439 | if (diag204((unsigned long)SUBC_STIB6 | |
| 440 | (unsigned long)INFO_EXT, pages, buf) >= 0) { |
Michael Holzheu | 7874b1b | 2009-10-14 12:43:44 +0200 | [diff] [blame] | 441 | diag204_store_sc = SUBC_STIB6; |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 442 | diag204_info_type = INFO_EXT; |
| 443 | goto out; |
| 444 | } |
| 445 | diag204_free_buffer(); |
| 446 | } |
| 447 | |
| 448 | /* subcodes 6 and 7 failed, now try subcode 4 */ |
| 449 | |
| 450 | buf = diag204_get_buffer(INFO_SIMPLE, &pages); |
| 451 | if (IS_ERR(buf)) { |
| 452 | rc = PTR_ERR(buf); |
| 453 | goto fail_alloc; |
| 454 | } |
Michael Holzheu | 331c982 | 2006-09-20 15:58:47 +0200 | [diff] [blame] | 455 | if (diag204((unsigned long)SUBC_STIB4 | |
| 456 | (unsigned long)INFO_SIMPLE, pages, buf) >= 0) { |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 457 | diag204_store_sc = SUBC_STIB4; |
| 458 | diag204_info_type = INFO_SIMPLE; |
| 459 | goto out; |
| 460 | } else { |
| 461 | rc = -ENOSYS; |
| 462 | goto fail_store; |
| 463 | } |
| 464 | out: |
| 465 | rc = 0; |
| 466 | fail_store: |
| 467 | diag204_free_buffer(); |
| 468 | fail_alloc: |
| 469 | return rc; |
| 470 | } |
| 471 | |
| 472 | static void *diag204_store(void) |
| 473 | { |
| 474 | void *buf; |
| 475 | int pages; |
| 476 | |
| 477 | buf = diag204_get_buffer(diag204_info_type, &pages); |
| 478 | if (IS_ERR(buf)) |
| 479 | goto out; |
Michael Holzheu | 331c982 | 2006-09-20 15:58:47 +0200 | [diff] [blame] | 480 | if (diag204((unsigned long)diag204_store_sc | |
| 481 | (unsigned long)diag204_info_type, pages, buf) < 0) |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 482 | return ERR_PTR(-ENOSYS); |
| 483 | out: |
| 484 | return buf; |
| 485 | } |
| 486 | |
| 487 | /* Diagnose 224 functions */ |
| 488 | |
Michael Holzheu | c41d4e3 | 2007-05-31 17:38:01 +0200 | [diff] [blame] | 489 | static int diag224(void *ptr) |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 490 | { |
Michael Holzheu | c41d4e3 | 2007-05-31 17:38:01 +0200 | [diff] [blame] | 491 | int rc = -ENOTSUPP; |
| 492 | |
| 493 | asm volatile( |
| 494 | " diag %1,%2,0x224\n" |
| 495 | "0: lhi %0,0x0\n" |
| 496 | "1:\n" |
| 497 | EX_TABLE(0b,1b) |
| 498 | : "+d" (rc) :"d" (0), "d" (ptr) : "memory"); |
| 499 | return rc; |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 500 | } |
| 501 | |
| 502 | static int diag224_get_name_table(void) |
| 503 | { |
| 504 | /* memory must be below 2GB */ |
| 505 | diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA); |
| 506 | if (!diag224_cpu_names) |
| 507 | return -ENOMEM; |
Michael Holzheu | c41d4e3 | 2007-05-31 17:38:01 +0200 | [diff] [blame] | 508 | if (diag224(diag224_cpu_names)) { |
| 509 | kfree(diag224_cpu_names); |
| 510 | return -ENOTSUPP; |
| 511 | } |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 512 | EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16); |
| 513 | return 0; |
| 514 | } |
| 515 | |
| 516 | static void diag224_delete_name_table(void) |
| 517 | { |
| 518 | kfree(diag224_cpu_names); |
| 519 | } |
| 520 | |
| 521 | static int diag224_idx2name(int index, char *name) |
| 522 | { |
| 523 | memcpy(name, diag224_cpu_names + ((index + 1) * CPU_NAME_LEN), |
| 524 | CPU_NAME_LEN); |
| 525 | name[CPU_NAME_LEN] = 0; |
Heiko Carstens | 1d802e2 | 2009-12-18 17:43:27 +0100 | [diff] [blame^] | 526 | strim(name); |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 527 | return 0; |
| 528 | } |
| 529 | |
| 530 | __init int hypfs_diag_init(void) |
| 531 | { |
| 532 | int rc; |
| 533 | |
| 534 | if (diag204_probe()) { |
Michael Holzheu | f55495b | 2008-12-25 13:39:39 +0100 | [diff] [blame] | 535 | pr_err("The hardware system does not support hypfs\n"); |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 536 | return -ENODATA; |
| 537 | } |
| 538 | rc = diag224_get_name_table(); |
| 539 | if (rc) { |
Christian Borntraeger | 86b2247 | 2006-12-15 17:18:10 +0100 | [diff] [blame] | 540 | diag204_free_buffer(); |
Michael Holzheu | f55495b | 2008-12-25 13:39:39 +0100 | [diff] [blame] | 541 | pr_err("The hardware system does not provide all " |
| 542 | "functions required by hypfs\n"); |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 543 | } |
| 544 | return rc; |
| 545 | } |
| 546 | |
Heiko Carstens | 1375fc1 | 2006-09-20 15:59:12 +0200 | [diff] [blame] | 547 | void hypfs_diag_exit(void) |
Michael Holzheu | 24bbb1f | 2006-06-23 02:05:06 -0700 | [diff] [blame] | 548 | { |
| 549 | diag224_delete_name_table(); |
| 550 | diag204_free_buffer(); |
| 551 | } |
| 552 | |
| 553 | /* |
| 554 | * Functions to create the directory structure |
| 555 | * ******************************************* |
| 556 | */ |
| 557 | |
| 558 | static int hypfs_create_cpu_files(struct super_block *sb, |
| 559 | struct dentry *cpus_dir, void *cpu_info) |
| 560 | { |
| 561 | struct dentry *cpu_dir; |
| 562 | char buffer[TMP_SIZE]; |
| 563 | void *rc; |
| 564 | |
| 565 | snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_info_type, |
| 566 | cpu_info)); |
| 567 | cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer); |
| 568 | rc = hypfs_create_u64(sb, cpu_dir, "mgmtime", |
| 569 | cpu_info__acc_time(diag204_info_type, cpu_info) - |
| 570 | cpu_info__lp_time(diag204_info_type, cpu_info)); |
| 571 | if (IS_ERR(rc)) |
| 572 | return PTR_ERR(rc); |
| 573 | rc = hypfs_create_u64(sb, cpu_dir, "cputime", |
| 574 | cpu_info__lp_time(diag204_info_type, cpu_info)); |
| 575 | if (IS_ERR(rc)) |
| 576 | return PTR_ERR(rc); |
| 577 | if (diag204_info_type == INFO_EXT) { |
| 578 | rc = hypfs_create_u64(sb, cpu_dir, "onlinetime", |
| 579 | cpu_info__online_time(diag204_info_type, |
| 580 | cpu_info)); |
| 581 | if (IS_ERR(rc)) |
| 582 | return PTR_ERR(rc); |
| 583 | } |
| 584 | diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer); |
| 585 | rc = hypfs_create_str(sb, cpu_dir, "type", buffer); |
| 586 | if (IS_ERR(rc)) |
| 587 | return PTR_ERR(rc); |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | static void *hypfs_create_lpar_files(struct super_block *sb, |
| 592 | struct dentry *systems_dir, void *part_hdr) |
| 593 | { |
| 594 | struct dentry *cpus_dir; |
| 595 | struct dentry *lpar_dir; |
| 596 | char lpar_name[LPAR_NAME_LEN + 1]; |
| 597 | void *cpu_info; |
| 598 | int i; |
| 599 | |
| 600 | part_hdr__part_name(diag204_info_type, part_hdr, lpar_name); |
| 601 | lpar_name[LPAR_NAME_LEN] = 0; |
| 602 | lpar_dir = hypfs_mkdir(sb, systems_dir, lpar_name); |
| 603 | if (IS_ERR(lpar_dir)) |
| 604 | return lpar_dir; |
| 605 | cpus_dir = hypfs_mkdir(sb, lpar_dir, "cpus"); |
| 606 | if (IS_ERR(cpus_dir)) |
| 607 | return cpus_dir; |
| 608 | cpu_info = part_hdr + part_hdr__size(diag204_info_type); |
| 609 | for (i = 0; i < part_hdr__rcpus(diag204_info_type, part_hdr); i++) { |
| 610 | int rc; |
| 611 | rc = hypfs_create_cpu_files(sb, cpus_dir, cpu_info); |
| 612 | if (rc) |
| 613 | return ERR_PTR(rc); |
| 614 | cpu_info += cpu_info__size(diag204_info_type); |
| 615 | } |
| 616 | return cpu_info; |
| 617 | } |
| 618 | |
| 619 | static int hypfs_create_phys_cpu_files(struct super_block *sb, |
| 620 | struct dentry *cpus_dir, void *cpu_info) |
| 621 | { |
| 622 | struct dentry *cpu_dir; |
| 623 | char buffer[TMP_SIZE]; |
| 624 | void *rc; |
| 625 | |
| 626 | snprintf(buffer, TMP_SIZE, "%i", phys_cpu__cpu_addr(diag204_info_type, |
| 627 | cpu_info)); |
| 628 | cpu_dir = hypfs_mkdir(sb, cpus_dir, buffer); |
| 629 | if (IS_ERR(cpu_dir)) |
| 630 | return PTR_ERR(cpu_dir); |
| 631 | rc = hypfs_create_u64(sb, cpu_dir, "mgmtime", |
| 632 | phys_cpu__mgm_time(diag204_info_type, cpu_info)); |
| 633 | if (IS_ERR(rc)) |
| 634 | return PTR_ERR(rc); |
| 635 | diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer); |
| 636 | rc = hypfs_create_str(sb, cpu_dir, "type", buffer); |
| 637 | if (IS_ERR(rc)) |
| 638 | return PTR_ERR(rc); |
| 639 | return 0; |
| 640 | } |
| 641 | |
| 642 | static void *hypfs_create_phys_files(struct super_block *sb, |
| 643 | struct dentry *parent_dir, void *phys_hdr) |
| 644 | { |
| 645 | int i; |
| 646 | void *cpu_info; |
| 647 | struct dentry *cpus_dir; |
| 648 | |
| 649 | cpus_dir = hypfs_mkdir(sb, parent_dir, "cpus"); |
| 650 | if (IS_ERR(cpus_dir)) |
| 651 | return cpus_dir; |
| 652 | cpu_info = phys_hdr + phys_hdr__size(diag204_info_type); |
| 653 | for (i = 0; i < phys_hdr__cpus(diag204_info_type, phys_hdr); i++) { |
| 654 | int rc; |
| 655 | rc = hypfs_create_phys_cpu_files(sb, cpus_dir, cpu_info); |
| 656 | if (rc) |
| 657 | return ERR_PTR(rc); |
| 658 | cpu_info += phys_cpu__size(diag204_info_type); |
| 659 | } |
| 660 | return cpu_info; |
| 661 | } |
| 662 | |
| 663 | int hypfs_diag_create_files(struct super_block *sb, struct dentry *root) |
| 664 | { |
| 665 | struct dentry *systems_dir, *hyp_dir; |
| 666 | void *time_hdr, *part_hdr; |
| 667 | int i, rc; |
| 668 | void *buffer, *ptr; |
| 669 | |
| 670 | buffer = diag204_store(); |
| 671 | if (IS_ERR(buffer)) |
| 672 | return PTR_ERR(buffer); |
| 673 | |
| 674 | systems_dir = hypfs_mkdir(sb, root, "systems"); |
| 675 | if (IS_ERR(systems_dir)) { |
| 676 | rc = PTR_ERR(systems_dir); |
| 677 | goto err_out; |
| 678 | } |
| 679 | time_hdr = (struct x_info_blk_hdr *)buffer; |
| 680 | part_hdr = time_hdr + info_blk_hdr__size(diag204_info_type); |
| 681 | for (i = 0; i < info_blk_hdr__npar(diag204_info_type, time_hdr); i++) { |
| 682 | part_hdr = hypfs_create_lpar_files(sb, systems_dir, part_hdr); |
| 683 | if (IS_ERR(part_hdr)) { |
| 684 | rc = PTR_ERR(part_hdr); |
| 685 | goto err_out; |
| 686 | } |
| 687 | } |
| 688 | if (info_blk_hdr__flags(diag204_info_type, time_hdr) & LPAR_PHYS_FLG) { |
| 689 | ptr = hypfs_create_phys_files(sb, root, part_hdr); |
| 690 | if (IS_ERR(ptr)) { |
| 691 | rc = PTR_ERR(ptr); |
| 692 | goto err_out; |
| 693 | } |
| 694 | } |
| 695 | hyp_dir = hypfs_mkdir(sb, root, "hyp"); |
| 696 | if (IS_ERR(hyp_dir)) { |
| 697 | rc = PTR_ERR(hyp_dir); |
| 698 | goto err_out; |
| 699 | } |
| 700 | ptr = hypfs_create_str(sb, hyp_dir, "type", "LPAR Hypervisor"); |
| 701 | if (IS_ERR(ptr)) { |
| 702 | rc = PTR_ERR(ptr); |
| 703 | goto err_out; |
| 704 | } |
| 705 | rc = 0; |
| 706 | |
| 707 | err_out: |
| 708 | return rc; |
| 709 | } |