1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * PS3 flash memory os area. |
4 | * |
5 | * Copyright (C) 2006 Sony Computer Entertainment Inc. |
6 | * Copyright 2006 Sony Corp. |
7 | */ |
8 | |
9 | #include <linux/kernel.h> |
10 | #include <linux/io.h> |
11 | #include <linux/workqueue.h> |
12 | #include <linux/fs.h> |
13 | #include <linux/syscalls.h> |
14 | #include <linux/export.h> |
15 | #include <linux/ctype.h> |
16 | #include <linux/memblock.h> |
17 | #include <linux/of.h> |
18 | #include <linux/slab.h> |
19 | |
20 | #include "platform.h" |
21 | |
22 | enum { |
23 | OS_AREA_SEGMENT_SIZE = 0X200, |
24 | }; |
25 | |
26 | enum os_area_ldr_format { |
27 | = 0, |
28 | = 1, |
29 | }; |
30 | |
31 | #define "cell_ext_os_area" |
32 | |
33 | /** |
34 | * struct os_area_header - os area header segment. |
35 | * @magic_num: Always 'cell_ext_os_area'. |
36 | * @hdr_version: Header format version number. |
37 | * @db_area_offset: Starting segment number of other os database area. |
38 | * @ldr_area_offset: Starting segment number of bootloader image area. |
39 | * @ldr_format: HEADER_LDR_FORMAT flag. |
40 | * @ldr_size: Size of bootloader image in bytes. |
41 | * |
42 | * Note that the docs refer to area offsets. These are offsets in units of |
43 | * segments from the start of the os area (top of the header). These are |
44 | * better thought of as segment numbers. The os area of the os area is |
45 | * reserved for the os image. |
46 | */ |
47 | |
48 | struct { |
49 | u8 [16]; |
50 | u32 ; |
51 | u32 ; |
52 | u32 ; |
53 | u32 ; |
54 | u32 ; |
55 | u32 ; |
56 | u32 [6]; |
57 | }; |
58 | |
59 | enum os_area_boot_flag { |
60 | PARAM_BOOT_FLAG_GAME_OS = 0, |
61 | PARAM_BOOT_FLAG_OTHER_OS = 1, |
62 | }; |
63 | |
64 | enum os_area_ctrl_button { |
65 | PARAM_CTRL_BUTTON_O_IS_YES = 0, |
66 | PARAM_CTRL_BUTTON_X_IS_YES = 1, |
67 | }; |
68 | |
69 | /** |
70 | * struct os_area_params - os area params segment. |
71 | * @boot_flag: User preference of operating system, PARAM_BOOT_FLAG flag. |
72 | * @num_params: Number of params in this (params) segment. |
73 | * @rtc_diff: Difference in seconds between 1970 and the ps3 rtc value. |
74 | * @av_multi_out: User preference of AV output, PARAM_AV_MULTI_OUT flag. |
75 | * @ctrl_button: User preference of controller button config, PARAM_CTRL_BUTTON |
76 | * flag. |
77 | * @static_ip_addr: User preference of static IP address. |
78 | * @network_mask: User preference of static network mask. |
79 | * @default_gateway: User preference of static default gateway. |
80 | * @dns_primary: User preference of static primary dns server. |
81 | * @dns_secondary: User preference of static secondary dns server. |
82 | * |
83 | * The ps3 rtc maintains a read-only value that approximates seconds since |
84 | * 2000-01-01 00:00:00 UTC. |
85 | * |
86 | * User preference of zero for static_ip_addr means use dhcp. |
87 | */ |
88 | |
89 | struct os_area_params { |
90 | u32 boot_flag; |
91 | u32 _reserved_1[3]; |
92 | u32 num_params; |
93 | u32 _reserved_2[3]; |
94 | /* param 0 */ |
95 | s64 rtc_diff; |
96 | u8 av_multi_out; |
97 | u8 ctrl_button; |
98 | u8 _reserved_3[6]; |
99 | /* param 1 */ |
100 | u8 static_ip_addr[4]; |
101 | u8 network_mask[4]; |
102 | u8 default_gateway[4]; |
103 | u8 _reserved_4[4]; |
104 | /* param 2 */ |
105 | u8 dns_primary[4]; |
106 | u8 dns_secondary[4]; |
107 | u8 _reserved_5[8]; |
108 | }; |
109 | |
110 | #define OS_AREA_DB_MAGIC_NUM "-db-" |
111 | |
112 | /** |
113 | * struct os_area_db - Shared flash memory database. |
114 | * @magic_num: Always '-db-'. |
115 | * @version: os_area_db format version number. |
116 | * @index_64: byte offset of the database id index for 64 bit variables. |
117 | * @count_64: number of usable 64 bit index entries |
118 | * @index_32: byte offset of the database id index for 32 bit variables. |
119 | * @count_32: number of usable 32 bit index entries |
120 | * @index_16: byte offset of the database id index for 16 bit variables. |
121 | * @count_16: number of usable 16 bit index entries |
122 | * |
123 | * Flash rom storage for exclusive use by guests running in the other os lpar. |
124 | * The current system configuration allocates 1K (two segments) for other os |
125 | * use. |
126 | */ |
127 | |
128 | struct os_area_db { |
129 | u8 magic_num[4]; |
130 | u16 version; |
131 | u16 _reserved_1; |
132 | u16 index_64; |
133 | u16 count_64; |
134 | u16 index_32; |
135 | u16 count_32; |
136 | u16 index_16; |
137 | u16 count_16; |
138 | u32 _reserved_2; |
139 | u8 _db_data[1000]; |
140 | }; |
141 | |
142 | /** |
143 | * enum os_area_db_owner - Data owners. |
144 | */ |
145 | |
146 | enum os_area_db_owner { |
147 | OS_AREA_DB_OWNER_ANY = -1, |
148 | OS_AREA_DB_OWNER_NONE = 0, |
149 | OS_AREA_DB_OWNER_PROTOTYPE = 1, |
150 | OS_AREA_DB_OWNER_LINUX = 2, |
151 | OS_AREA_DB_OWNER_PETITBOOT = 3, |
152 | OS_AREA_DB_OWNER_MAX = 32, |
153 | }; |
154 | |
155 | enum os_area_db_key { |
156 | OS_AREA_DB_KEY_ANY = -1, |
157 | OS_AREA_DB_KEY_NONE = 0, |
158 | OS_AREA_DB_KEY_RTC_DIFF = 1, |
159 | OS_AREA_DB_KEY_VIDEO_MODE = 2, |
160 | OS_AREA_DB_KEY_MAX = 8, |
161 | }; |
162 | |
163 | struct os_area_db_id { |
164 | int owner; |
165 | int key; |
166 | }; |
167 | |
168 | static const struct os_area_db_id os_area_db_id_empty = { |
169 | .owner = OS_AREA_DB_OWNER_NONE, |
170 | .key = OS_AREA_DB_KEY_NONE |
171 | }; |
172 | |
173 | static const struct os_area_db_id os_area_db_id_any = { |
174 | .owner = OS_AREA_DB_OWNER_ANY, |
175 | .key = OS_AREA_DB_KEY_ANY |
176 | }; |
177 | |
178 | static const struct os_area_db_id os_area_db_id_rtc_diff = { |
179 | .owner = OS_AREA_DB_OWNER_LINUX, |
180 | .key = OS_AREA_DB_KEY_RTC_DIFF |
181 | }; |
182 | |
183 | #define SECONDS_FROM_1970_TO_2000 946684800LL |
184 | |
185 | /** |
186 | * struct saved_params - Static working copies of data from the PS3 'os area'. |
187 | * |
188 | * The order of preference we use for the rtc_diff source: |
189 | * 1) The database value. |
190 | * 2) The game os value. |
191 | * 3) The number of seconds from 1970 to 2000. |
192 | */ |
193 | |
194 | static struct saved_params { |
195 | unsigned int valid; |
196 | s64 rtc_diff; |
197 | unsigned int av_multi_out; |
198 | } saved_params; |
199 | |
200 | static struct property property_rtc_diff = { |
201 | .name = "linux,rtc_diff" , |
202 | .length = sizeof(saved_params.rtc_diff), |
203 | .value = &saved_params.rtc_diff, |
204 | }; |
205 | |
206 | static struct property property_av_multi_out = { |
207 | .name = "linux,av_multi_out" , |
208 | .length = sizeof(saved_params.av_multi_out), |
209 | .value = &saved_params.av_multi_out, |
210 | }; |
211 | |
212 | |
213 | static DEFINE_MUTEX(os_area_flash_mutex); |
214 | |
215 | static const struct ps3_os_area_flash_ops *os_area_flash_ops; |
216 | |
217 | void ps3_os_area_flash_register(const struct ps3_os_area_flash_ops *ops) |
218 | { |
219 | mutex_lock(&os_area_flash_mutex); |
220 | os_area_flash_ops = ops; |
221 | mutex_unlock(lock: &os_area_flash_mutex); |
222 | } |
223 | EXPORT_SYMBOL_GPL(ps3_os_area_flash_register); |
224 | |
225 | static ssize_t os_area_flash_read(void *buf, size_t count, loff_t pos) |
226 | { |
227 | ssize_t res = -ENODEV; |
228 | |
229 | mutex_lock(&os_area_flash_mutex); |
230 | if (os_area_flash_ops) |
231 | res = os_area_flash_ops->read(buf, count, pos); |
232 | mutex_unlock(lock: &os_area_flash_mutex); |
233 | |
234 | return res; |
235 | } |
236 | |
237 | static ssize_t os_area_flash_write(const void *buf, size_t count, loff_t pos) |
238 | { |
239 | ssize_t res = -ENODEV; |
240 | |
241 | mutex_lock(&os_area_flash_mutex); |
242 | if (os_area_flash_ops) |
243 | res = os_area_flash_ops->write(buf, count, pos); |
244 | mutex_unlock(lock: &os_area_flash_mutex); |
245 | |
246 | return res; |
247 | } |
248 | |
249 | |
250 | /** |
251 | * os_area_set_property - Add or overwrite a saved_params value to the device tree. |
252 | * |
253 | * Overwrites an existing property. |
254 | */ |
255 | |
256 | static void os_area_set_property(struct device_node *node, |
257 | struct property *prop) |
258 | { |
259 | int result; |
260 | struct property *tmp = of_find_property(np: node, name: prop->name, NULL); |
261 | |
262 | if (tmp) { |
263 | pr_debug("%s:%d found %s\n" , __func__, __LINE__, prop->name); |
264 | of_remove_property(np: node, prop: tmp); |
265 | } |
266 | |
267 | result = of_add_property(np: node, prop); |
268 | |
269 | if (result) |
270 | pr_debug("%s:%d of_set_property failed\n" , __func__, |
271 | __LINE__); |
272 | } |
273 | |
274 | /** |
275 | * os_area_get_property - Get a saved_params value from the device tree. |
276 | * |
277 | */ |
278 | |
279 | static void __init os_area_get_property(struct device_node *node, |
280 | struct property *prop) |
281 | { |
282 | const struct property *tmp = of_find_property(np: node, name: prop->name, NULL); |
283 | |
284 | if (tmp) { |
285 | BUG_ON(prop->length != tmp->length); |
286 | memcpy(prop->value, tmp->value, prop->length); |
287 | } else |
288 | pr_debug("%s:%d not found %s\n" , __func__, __LINE__, |
289 | prop->name); |
290 | } |
291 | |
292 | static void dump_field(char *s, const u8 *field, int size_of_field) |
293 | { |
294 | #if defined(DEBUG) |
295 | int i; |
296 | |
297 | for (i = 0; i < size_of_field; i++) |
298 | s[i] = isprint(field[i]) ? field[i] : '.'; |
299 | s[i] = 0; |
300 | #endif |
301 | } |
302 | |
303 | #define (_a) _dump_header(_a, __func__, __LINE__) |
304 | static void (const struct os_area_header *h, const char *func, |
305 | int line) |
306 | { |
307 | char str[sizeof(h->magic_num) + 1]; |
308 | |
309 | dump_field(s: str, field: h->magic_num, size_of_field: sizeof(h->magic_num)); |
310 | pr_debug("%s:%d: h.magic_num: '%s'\n" , func, line, |
311 | str); |
312 | pr_debug("%s:%d: h.hdr_version: %u\n" , func, line, |
313 | h->hdr_version); |
314 | pr_debug("%s:%d: h.db_area_offset: %u\n" , func, line, |
315 | h->db_area_offset); |
316 | pr_debug("%s:%d: h.ldr_area_offset: %u\n" , func, line, |
317 | h->ldr_area_offset); |
318 | pr_debug("%s:%d: h.ldr_format: %u\n" , func, line, |
319 | h->ldr_format); |
320 | pr_debug("%s:%d: h.ldr_size: %xh\n" , func, line, |
321 | h->ldr_size); |
322 | } |
323 | |
324 | #define dump_params(_a) _dump_params(_a, __func__, __LINE__) |
325 | static void _dump_params(const struct os_area_params *p, const char *func, |
326 | int line) |
327 | { |
328 | pr_debug("%s:%d: p.boot_flag: %u\n" , func, line, p->boot_flag); |
329 | pr_debug("%s:%d: p.num_params: %u\n" , func, line, p->num_params); |
330 | pr_debug("%s:%d: p.rtc_diff %lld\n" , func, line, p->rtc_diff); |
331 | pr_debug("%s:%d: p.av_multi_out %u\n" , func, line, p->av_multi_out); |
332 | pr_debug("%s:%d: p.ctrl_button: %u\n" , func, line, p->ctrl_button); |
333 | pr_debug("%s:%d: p.static_ip_addr: %u.%u.%u.%u\n" , func, line, |
334 | p->static_ip_addr[0], p->static_ip_addr[1], |
335 | p->static_ip_addr[2], p->static_ip_addr[3]); |
336 | pr_debug("%s:%d: p.network_mask: %u.%u.%u.%u\n" , func, line, |
337 | p->network_mask[0], p->network_mask[1], |
338 | p->network_mask[2], p->network_mask[3]); |
339 | pr_debug("%s:%d: p.default_gateway: %u.%u.%u.%u\n" , func, line, |
340 | p->default_gateway[0], p->default_gateway[1], |
341 | p->default_gateway[2], p->default_gateway[3]); |
342 | pr_debug("%s:%d: p.dns_primary: %u.%u.%u.%u\n" , func, line, |
343 | p->dns_primary[0], p->dns_primary[1], |
344 | p->dns_primary[2], p->dns_primary[3]); |
345 | pr_debug("%s:%d: p.dns_secondary: %u.%u.%u.%u\n" , func, line, |
346 | p->dns_secondary[0], p->dns_secondary[1], |
347 | p->dns_secondary[2], p->dns_secondary[3]); |
348 | } |
349 | |
350 | static int (const struct os_area_header *) |
351 | { |
352 | if (memcmp(p: header->magic_num, OS_AREA_HEADER_MAGIC_NUM, |
353 | size: sizeof(header->magic_num))) { |
354 | pr_debug("%s:%d magic_num failed\n" , __func__, __LINE__); |
355 | return -1; |
356 | } |
357 | |
358 | if (header->hdr_version < 1) { |
359 | pr_debug("%s:%d hdr_version failed\n" , __func__, __LINE__); |
360 | return -1; |
361 | } |
362 | |
363 | if (header->db_area_offset > header->ldr_area_offset) { |
364 | pr_debug("%s:%d offsets failed\n" , __func__, __LINE__); |
365 | return -1; |
366 | } |
367 | |
368 | return 0; |
369 | } |
370 | |
371 | static int db_verify(const struct os_area_db *db) |
372 | { |
373 | if (memcmp(p: db->magic_num, OS_AREA_DB_MAGIC_NUM, |
374 | size: sizeof(db->magic_num))) { |
375 | pr_debug("%s:%d magic_num failed\n" , __func__, __LINE__); |
376 | return -EINVAL; |
377 | } |
378 | |
379 | if (db->version != 1) { |
380 | pr_debug("%s:%d version failed\n" , __func__, __LINE__); |
381 | return -EINVAL; |
382 | } |
383 | |
384 | return 0; |
385 | } |
386 | |
387 | struct db_index { |
388 | uint8_t owner:5; |
389 | uint8_t key:3; |
390 | }; |
391 | |
392 | struct db_iterator { |
393 | const struct os_area_db *db; |
394 | struct os_area_db_id match_id; |
395 | struct db_index *idx; |
396 | struct db_index *last_idx; |
397 | union { |
398 | uint64_t *value_64; |
399 | uint32_t *value_32; |
400 | uint16_t *value_16; |
401 | }; |
402 | }; |
403 | |
404 | static unsigned int db_align_up(unsigned int val, unsigned int size) |
405 | { |
406 | return (val + (size - 1)) & (~(size - 1)); |
407 | } |
408 | |
409 | /** |
410 | * db_for_each_64 - Iterator for 64 bit entries. |
411 | * |
412 | * A NULL value for id can be used to match all entries. |
413 | * OS_AREA_DB_OWNER_ANY and OS_AREA_DB_KEY_ANY can be used to match all. |
414 | */ |
415 | |
416 | static int db_for_each_64(const struct os_area_db *db, |
417 | const struct os_area_db_id *match_id, struct db_iterator *i) |
418 | { |
419 | next: |
420 | if (!i->db) { |
421 | i->db = db; |
422 | i->match_id = match_id ? *match_id : os_area_db_id_any; |
423 | i->idx = (void *)db + db->index_64; |
424 | i->last_idx = i->idx + db->count_64; |
425 | i->value_64 = (void *)db + db->index_64 |
426 | + db_align_up(val: db->count_64, size: 8); |
427 | } else { |
428 | i->idx++; |
429 | i->value_64++; |
430 | } |
431 | |
432 | if (i->idx >= i->last_idx) { |
433 | pr_debug("%s:%d: reached end\n" , __func__, __LINE__); |
434 | return 0; |
435 | } |
436 | |
437 | if (i->match_id.owner != OS_AREA_DB_OWNER_ANY |
438 | && i->match_id.owner != (int)i->idx->owner) |
439 | goto next; |
440 | if (i->match_id.key != OS_AREA_DB_KEY_ANY |
441 | && i->match_id.key != (int)i->idx->key) |
442 | goto next; |
443 | |
444 | return 1; |
445 | } |
446 | |
447 | static int db_delete_64(struct os_area_db *db, const struct os_area_db_id *id) |
448 | { |
449 | struct db_iterator i; |
450 | |
451 | for (i.db = NULL; db_for_each_64(db, match_id: id, i: &i); ) { |
452 | |
453 | pr_debug("%s:%d: got (%d:%d) %llxh\n" , __func__, __LINE__, |
454 | i.idx->owner, i.idx->key, |
455 | (unsigned long long)*i.value_64); |
456 | |
457 | i.idx->owner = 0; |
458 | i.idx->key = 0; |
459 | *i.value_64 = 0; |
460 | } |
461 | return 0; |
462 | } |
463 | |
464 | static int db_set_64(struct os_area_db *db, const struct os_area_db_id *id, |
465 | uint64_t value) |
466 | { |
467 | struct db_iterator i; |
468 | |
469 | pr_debug("%s:%d: (%d:%d) <= %llxh\n" , __func__, __LINE__, |
470 | id->owner, id->key, (unsigned long long)value); |
471 | |
472 | if (!id->owner || id->owner == OS_AREA_DB_OWNER_ANY |
473 | || id->key == OS_AREA_DB_KEY_ANY) { |
474 | pr_debug("%s:%d: bad id: (%d:%d)\n" , __func__, |
475 | __LINE__, id->owner, id->key); |
476 | return -1; |
477 | } |
478 | |
479 | db_delete_64(db, id); |
480 | |
481 | i.db = NULL; |
482 | if (db_for_each_64(db, match_id: &os_area_db_id_empty, i: &i)) { |
483 | |
484 | pr_debug("%s:%d: got (%d:%d) %llxh\n" , __func__, __LINE__, |
485 | i.idx->owner, i.idx->key, |
486 | (unsigned long long)*i.value_64); |
487 | |
488 | i.idx->owner = id->owner; |
489 | i.idx->key = id->key; |
490 | *i.value_64 = value; |
491 | |
492 | pr_debug("%s:%d: set (%d:%d) <= %llxh\n" , __func__, __LINE__, |
493 | i.idx->owner, i.idx->key, |
494 | (unsigned long long)*i.value_64); |
495 | return 0; |
496 | } |
497 | pr_debug("%s:%d: database full.\n" , |
498 | __func__, __LINE__); |
499 | return -1; |
500 | } |
501 | |
502 | static int __init db_get_64(const struct os_area_db *db, |
503 | const struct os_area_db_id *id, uint64_t *value) |
504 | { |
505 | struct db_iterator i; |
506 | |
507 | i.db = NULL; |
508 | if (db_for_each_64(db, match_id: id, i: &i)) { |
509 | *value = *i.value_64; |
510 | pr_debug("%s:%d: found %lld\n" , __func__, __LINE__, |
511 | (long long int)*i.value_64); |
512 | return 0; |
513 | } |
514 | pr_debug("%s:%d: not found\n" , __func__, __LINE__); |
515 | return -1; |
516 | } |
517 | |
518 | static int __init db_get_rtc_diff(const struct os_area_db *db, int64_t *rtc_diff) |
519 | { |
520 | return db_get_64(db, id: &os_area_db_id_rtc_diff, value: (uint64_t*)rtc_diff); |
521 | } |
522 | |
523 | #define dump_db(a) _dump_db(a, __func__, __LINE__) |
524 | static void _dump_db(const struct os_area_db *db, const char *func, |
525 | int line) |
526 | { |
527 | char str[sizeof(db->magic_num) + 1]; |
528 | |
529 | dump_field(s: str, field: db->magic_num, size_of_field: sizeof(db->magic_num)); |
530 | pr_debug("%s:%d: db.magic_num: '%s'\n" , func, line, |
531 | str); |
532 | pr_debug("%s:%d: db.version: %u\n" , func, line, |
533 | db->version); |
534 | pr_debug("%s:%d: db.index_64: %u\n" , func, line, |
535 | db->index_64); |
536 | pr_debug("%s:%d: db.count_64: %u\n" , func, line, |
537 | db->count_64); |
538 | pr_debug("%s:%d: db.index_32: %u\n" , func, line, |
539 | db->index_32); |
540 | pr_debug("%s:%d: db.count_32: %u\n" , func, line, |
541 | db->count_32); |
542 | pr_debug("%s:%d: db.index_16: %u\n" , func, line, |
543 | db->index_16); |
544 | pr_debug("%s:%d: db.count_16: %u\n" , func, line, |
545 | db->count_16); |
546 | } |
547 | |
548 | static void os_area_db_init(struct os_area_db *db) |
549 | { |
550 | enum { |
551 | = offsetof(struct os_area_db, _db_data), |
552 | INDEX_64_COUNT = 64, |
553 | VALUES_64_COUNT = 57, |
554 | INDEX_32_COUNT = 64, |
555 | VALUES_32_COUNT = 57, |
556 | INDEX_16_COUNT = 64, |
557 | VALUES_16_COUNT = 57, |
558 | }; |
559 | |
560 | memset(db, 0, sizeof(struct os_area_db)); |
561 | |
562 | memcpy(db->magic_num, OS_AREA_DB_MAGIC_NUM, sizeof(db->magic_num)); |
563 | db->version = 1; |
564 | db->index_64 = HEADER_SIZE; |
565 | db->count_64 = VALUES_64_COUNT; |
566 | db->index_32 = HEADER_SIZE |
567 | + INDEX_64_COUNT * sizeof(struct db_index) |
568 | + VALUES_64_COUNT * sizeof(u64); |
569 | db->count_32 = VALUES_32_COUNT; |
570 | db->index_16 = HEADER_SIZE |
571 | + INDEX_64_COUNT * sizeof(struct db_index) |
572 | + VALUES_64_COUNT * sizeof(u64) |
573 | + INDEX_32_COUNT * sizeof(struct db_index) |
574 | + VALUES_32_COUNT * sizeof(u32); |
575 | db->count_16 = VALUES_16_COUNT; |
576 | |
577 | /* Rules to check db layout. */ |
578 | |
579 | BUILD_BUG_ON(sizeof(struct db_index) != 1); |
580 | BUILD_BUG_ON(sizeof(struct os_area_db) != 2 * OS_AREA_SEGMENT_SIZE); |
581 | BUILD_BUG_ON(INDEX_64_COUNT & 0x7); |
582 | BUILD_BUG_ON(VALUES_64_COUNT > INDEX_64_COUNT); |
583 | BUILD_BUG_ON(INDEX_32_COUNT & 0x7); |
584 | BUILD_BUG_ON(VALUES_32_COUNT > INDEX_32_COUNT); |
585 | BUILD_BUG_ON(INDEX_16_COUNT & 0x7); |
586 | BUILD_BUG_ON(VALUES_16_COUNT > INDEX_16_COUNT); |
587 | BUILD_BUG_ON(HEADER_SIZE |
588 | + INDEX_64_COUNT * sizeof(struct db_index) |
589 | + VALUES_64_COUNT * sizeof(u64) |
590 | + INDEX_32_COUNT * sizeof(struct db_index) |
591 | + VALUES_32_COUNT * sizeof(u32) |
592 | + INDEX_16_COUNT * sizeof(struct db_index) |
593 | + VALUES_16_COUNT * sizeof(u16) |
594 | > sizeof(struct os_area_db)); |
595 | } |
596 | |
597 | /** |
598 | * update_flash_db - Helper for os_area_queue_work_handler. |
599 | * |
600 | */ |
601 | |
602 | static int update_flash_db(void) |
603 | { |
604 | const unsigned int buf_len = 8 * OS_AREA_SEGMENT_SIZE; |
605 | struct os_area_header *; |
606 | ssize_t count; |
607 | int error; |
608 | loff_t pos; |
609 | struct os_area_db* db; |
610 | |
611 | /* Read in header and db from flash. */ |
612 | |
613 | header = kmalloc(size: buf_len, GFP_KERNEL); |
614 | if (!header) |
615 | return -ENOMEM; |
616 | |
617 | count = os_area_flash_read(buf: header, count: buf_len, pos: 0); |
618 | if (count < 0) { |
619 | pr_debug("%s: os_area_flash_read failed %zd\n" , __func__, |
620 | count); |
621 | error = count; |
622 | goto fail; |
623 | } |
624 | |
625 | pos = header->db_area_offset * OS_AREA_SEGMENT_SIZE; |
626 | if (count < OS_AREA_SEGMENT_SIZE || verify_header(header) || |
627 | count < pos) { |
628 | pr_debug("%s: verify_header failed\n" , __func__); |
629 | dump_header(header); |
630 | error = -EINVAL; |
631 | goto fail; |
632 | } |
633 | |
634 | /* Now got a good db offset and some maybe good db data. */ |
635 | |
636 | db = (void *)header + pos; |
637 | |
638 | error = db_verify(db); |
639 | if (error) { |
640 | pr_notice("%s: Verify of flash database failed, formatting.\n" , |
641 | __func__); |
642 | dump_db(db); |
643 | os_area_db_init(db); |
644 | } |
645 | |
646 | /* Now got good db data. */ |
647 | |
648 | db_set_64(db, id: &os_area_db_id_rtc_diff, value: saved_params.rtc_diff); |
649 | |
650 | count = os_area_flash_write(buf: db, count: sizeof(struct os_area_db), pos); |
651 | if (count < 0 || count < sizeof(struct os_area_db)) { |
652 | pr_debug("%s: os_area_flash_write failed %zd\n" , __func__, |
653 | count); |
654 | error = count < 0 ? count : -EIO; |
655 | } |
656 | |
657 | fail: |
658 | kfree(objp: header); |
659 | return error; |
660 | } |
661 | |
662 | /** |
663 | * os_area_queue_work_handler - Asynchronous write handler. |
664 | * |
665 | * An asynchronous write for flash memory and the device tree. Do not |
666 | * call directly, use os_area_queue_work(). |
667 | */ |
668 | |
669 | static void os_area_queue_work_handler(struct work_struct *work) |
670 | { |
671 | struct device_node *node; |
672 | int error; |
673 | |
674 | pr_debug(" -> %s:%d\n" , __func__, __LINE__); |
675 | |
676 | node = of_find_node_by_path(path: "/" ); |
677 | if (node) { |
678 | os_area_set_property(node, prop: &property_rtc_diff); |
679 | of_node_put(node); |
680 | } else |
681 | pr_debug("%s:%d of_find_node_by_path failed\n" , |
682 | __func__, __LINE__); |
683 | |
684 | error = update_flash_db(); |
685 | if (error) |
686 | pr_warn("%s: Could not update FLASH ROM\n" , __func__); |
687 | |
688 | pr_debug(" <- %s:%d\n" , __func__, __LINE__); |
689 | } |
690 | |
691 | static void os_area_queue_work(void) |
692 | { |
693 | static DECLARE_WORK(q, os_area_queue_work_handler); |
694 | |
695 | wmb(); |
696 | schedule_work(work: &q); |
697 | } |
698 | |
699 | /** |
700 | * ps3_os_area_save_params - Copy data from os area mirror to @saved_params. |
701 | * |
702 | * For the convenience of the guest the HV makes a copy of the os area in |
703 | * flash to a high address in the boot memory region and then puts that RAM |
704 | * address and the byte count into the repository for retrieval by the guest. |
705 | * We copy the data we want into a static variable and allow the memory setup |
706 | * by the HV to be claimed by the memblock manager. |
707 | * |
708 | * The os area mirror will not be available to a second stage kernel, and |
709 | * the header verify will fail. In this case, the saved_params values will |
710 | * be set from flash memory or the passed in device tree in ps3_os_area_init(). |
711 | */ |
712 | |
713 | void __init ps3_os_area_save_params(void) |
714 | { |
715 | int result; |
716 | u64 lpar_addr; |
717 | unsigned int size; |
718 | struct os_area_header *; |
719 | struct os_area_params *params; |
720 | struct os_area_db *db; |
721 | |
722 | pr_debug(" -> %s:%d\n" , __func__, __LINE__); |
723 | |
724 | result = ps3_repository_read_boot_dat_info(lpar_addr: &lpar_addr, size: &size); |
725 | |
726 | if (result) { |
727 | pr_debug("%s:%d ps3_repository_read_boot_dat_info failed\n" , |
728 | __func__, __LINE__); |
729 | return; |
730 | } |
731 | |
732 | header = (struct os_area_header *)__va(lpar_addr); |
733 | params = (struct os_area_params *)__va(lpar_addr |
734 | + OS_AREA_SEGMENT_SIZE); |
735 | |
736 | result = verify_header(header); |
737 | |
738 | if (result) { |
739 | /* Second stage kernels exit here. */ |
740 | pr_debug("%s:%d verify_header failed\n" , __func__, __LINE__); |
741 | dump_header(header); |
742 | return; |
743 | } |
744 | |
745 | db = (struct os_area_db *)__va(lpar_addr |
746 | + header->db_area_offset * OS_AREA_SEGMENT_SIZE); |
747 | |
748 | dump_header(header); |
749 | dump_params(params); |
750 | dump_db(db); |
751 | |
752 | result = db_verify(db) || db_get_rtc_diff(db, rtc_diff: &saved_params.rtc_diff); |
753 | if (result) |
754 | saved_params.rtc_diff = params->rtc_diff ? params->rtc_diff |
755 | : SECONDS_FROM_1970_TO_2000; |
756 | saved_params.av_multi_out = params->av_multi_out; |
757 | saved_params.valid = 1; |
758 | |
759 | memset(header, 0, sizeof(*header)); |
760 | |
761 | pr_debug(" <- %s:%d\n" , __func__, __LINE__); |
762 | } |
763 | |
764 | /** |
765 | * ps3_os_area_init - Setup os area device tree properties as needed. |
766 | */ |
767 | |
768 | void __init ps3_os_area_init(void) |
769 | { |
770 | struct device_node *node; |
771 | |
772 | pr_debug(" -> %s:%d\n" , __func__, __LINE__); |
773 | |
774 | node = of_find_node_by_path(path: "/" ); |
775 | |
776 | if (!saved_params.valid && node) { |
777 | /* Second stage kernels should have a dt entry. */ |
778 | os_area_get_property(node, prop: &property_rtc_diff); |
779 | os_area_get_property(node, prop: &property_av_multi_out); |
780 | } |
781 | |
782 | if(!saved_params.rtc_diff) |
783 | saved_params.rtc_diff = SECONDS_FROM_1970_TO_2000; |
784 | |
785 | if (node) { |
786 | os_area_set_property(node, prop: &property_rtc_diff); |
787 | os_area_set_property(node, prop: &property_av_multi_out); |
788 | of_node_put(node); |
789 | } else |
790 | pr_debug("%s:%d of_find_node_by_path failed\n" , |
791 | __func__, __LINE__); |
792 | |
793 | pr_debug(" <- %s:%d\n" , __func__, __LINE__); |
794 | } |
795 | |
796 | /** |
797 | * ps3_os_area_get_rtc_diff - Returns the rtc diff value. |
798 | */ |
799 | |
800 | u64 ps3_os_area_get_rtc_diff(void) |
801 | { |
802 | return saved_params.rtc_diff; |
803 | } |
804 | EXPORT_SYMBOL_GPL(ps3_os_area_get_rtc_diff); |
805 | |
806 | /** |
807 | * ps3_os_area_set_rtc_diff - Set the rtc diff value. |
808 | * |
809 | * An asynchronous write is needed to support writing updates from |
810 | * the timer interrupt context. |
811 | */ |
812 | |
813 | void ps3_os_area_set_rtc_diff(u64 rtc_diff) |
814 | { |
815 | if (saved_params.rtc_diff != rtc_diff) { |
816 | saved_params.rtc_diff = rtc_diff; |
817 | os_area_queue_work(); |
818 | } |
819 | } |
820 | EXPORT_SYMBOL_GPL(ps3_os_area_set_rtc_diff); |
821 | |
822 | /** |
823 | * ps3_os_area_get_av_multi_out - Returns the default video mode. |
824 | */ |
825 | |
826 | enum ps3_param_av_multi_out ps3_os_area_get_av_multi_out(void) |
827 | { |
828 | return saved_params.av_multi_out; |
829 | } |
830 | EXPORT_SYMBOL_GPL(ps3_os_area_get_av_multi_out); |
831 | |