Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * csr1212.c -- IEEE 1212 Control and Status Register support for Linux | |
3 | * | |
4 | * Copyright (C) 2003 Francois Retief <fgretief@sun.ac.za> | |
5 | * Steve Kinneberg <kinnebergsteve@acmsystems.com> | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions are met: | |
9 | * | |
10 | * 1. Redistributions of source code must retain the above copyright notice, | |
11 | * this list of conditions and the following disclaimer. | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
15 | * 3. The name of the author may not be used to endorse or promote products | |
16 | * derived from this software without specific prior written permission. | |
17 | * | |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
19 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
21 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
26 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
27 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
28 | */ | |
29 | ||
30 | ||
31 | /* TODO List: | |
32 | * - Verify interface consistency: i.e., public functions that take a size | |
33 | * parameter expect size to be in bytes. | |
1da177e4 LT |
34 | */ |
35 | ||
7fb9addb | 36 | #include <linux/errno.h> |
d2652503 | 37 | #include <linux/kernel.h> |
96c25c81 | 38 | #include <linux/kmemcheck.h> |
7fb9addb | 39 | #include <linux/string.h> |
64ff7123 | 40 | #include <asm/bug.h> |
7fb9addb | 41 | #include <asm/byteorder.h> |
1da177e4 LT |
42 | |
43 | #include "csr1212.h" | |
44 | ||
45 | ||
46 | /* Permitted key type for each key id */ | |
47 | #define __I (1 << CSR1212_KV_TYPE_IMMEDIATE) | |
48 | #define __C (1 << CSR1212_KV_TYPE_CSR_OFFSET) | |
49 | #define __D (1 << CSR1212_KV_TYPE_DIRECTORY) | |
50 | #define __L (1 << CSR1212_KV_TYPE_LEAF) | |
982610bd | 51 | static const u8 csr1212_key_id_type_map[0x30] = { |
0749aaab | 52 | __C, /* used by Apple iSight */ |
1da177e4 LT |
53 | __D | __L, /* Descriptor */ |
54 | __I | __D | __L, /* Bus_Dependent_Info */ | |
55 | __I | __D | __L, /* Vendor */ | |
56 | __I, /* Hardware_Version */ | |
57 | 0, 0, /* Reserved */ | |
0749aaab AG |
58 | __D | __L | __I, /* Module */ |
59 | __I, 0, 0, 0, /* used by Apple iSight, Reserved */ | |
1da177e4 LT |
60 | __I, /* Node_Capabilities */ |
61 | __L, /* EUI_64 */ | |
62 | 0, 0, 0, /* Reserved */ | |
63 | __D, /* Unit */ | |
64 | __I, /* Specifier_ID */ | |
65 | __I, /* Version */ | |
66 | __I | __C | __D | __L, /* Dependent_Info */ | |
67 | __L, /* Unit_Location */ | |
68 | 0, /* Reserved */ | |
69 | __I, /* Model */ | |
70 | __D, /* Instance */ | |
71 | __L, /* Keyword */ | |
72 | __D, /* Feature */ | |
73 | __L, /* Extended_ROM */ | |
74 | __I, /* Extended_Key_Specifier_ID */ | |
75 | __I, /* Extended_Key */ | |
76 | __I | __C | __D | __L, /* Extended_Data */ | |
77 | __L, /* Modifiable_Descriptor */ | |
78 | __I, /* Directory_ID */ | |
79 | __I, /* Revision */ | |
80 | }; | |
81 | #undef __I | |
82 | #undef __C | |
83 | #undef __D | |
84 | #undef __L | |
85 | ||
86 | ||
982610bd | 87 | #define quads_to_bytes(_q) ((_q) * sizeof(u32)) |
68e2aa79 | 88 | #define bytes_to_quads(_b) DIV_ROUND_UP(_b, sizeof(u32)) |
1da177e4 | 89 | |
6c88e475 | 90 | static void free_keyval(struct csr1212_keyval *kv) |
1da177e4 LT |
91 | { |
92 | if ((kv->key.type == CSR1212_KV_TYPE_LEAF) && | |
93 | (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM)) | |
94 | CSR1212_FREE(kv->value.leaf.data); | |
95 | ||
96 | CSR1212_FREE(kv); | |
97 | } | |
98 | ||
982610bd | 99 | static u16 csr1212_crc16(const u32 *buffer, size_t length) |
1da177e4 LT |
100 | { |
101 | int shift; | |
982610bd SR |
102 | u32 data; |
103 | u16 sum, crc = 0; | |
1da177e4 LT |
104 | |
105 | for (; length; length--) { | |
7fb9addb | 106 | data = be32_to_cpu(*buffer); |
1da177e4 LT |
107 | buffer++; |
108 | for (shift = 28; shift >= 0; shift -= 4 ) { | |
109 | sum = ((crc >> 12) ^ (data >> shift)) & 0xf; | |
110 | crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum); | |
111 | } | |
112 | crc &= 0xffff; | |
113 | } | |
114 | ||
7fb9addb | 115 | return cpu_to_be16(crc); |
1da177e4 LT |
116 | } |
117 | ||
d2652503 | 118 | /* Microsoft computes the CRC with the bytes in reverse order. */ |
982610bd | 119 | static u16 csr1212_msft_crc16(const u32 *buffer, size_t length) |
1da177e4 LT |
120 | { |
121 | int shift; | |
982610bd SR |
122 | u32 data; |
123 | u16 sum, crc = 0; | |
1da177e4 LT |
124 | |
125 | for (; length; length--) { | |
7fb9addb | 126 | data = le32_to_cpu(*buffer); |
1da177e4 LT |
127 | buffer++; |
128 | for (shift = 28; shift >= 0; shift -= 4 ) { | |
129 | sum = ((crc >> 12) ^ (data >> shift)) & 0xf; | |
130 | crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum); | |
131 | } | |
132 | crc &= 0xffff; | |
133 | } | |
134 | ||
7fb9addb | 135 | return cpu_to_be16(crc); |
1da177e4 | 136 | } |
1da177e4 | 137 | |
6c88e475 SR |
138 | static struct csr1212_dentry * |
139 | csr1212_find_keyval(struct csr1212_keyval *dir, struct csr1212_keyval *kv) | |
1da177e4 LT |
140 | { |
141 | struct csr1212_dentry *pos; | |
142 | ||
143 | for (pos = dir->value.directory.dentries_head; | |
c868ae2a | 144 | pos != NULL; pos = pos->next) |
1da177e4 LT |
145 | if (pos->kv == kv) |
146 | return pos; | |
1da177e4 LT |
147 | return NULL; |
148 | } | |
149 | ||
6c88e475 | 150 | static struct csr1212_keyval * |
982610bd | 151 | csr1212_find_keyval_offset(struct csr1212_keyval *kv_list, u32 offset) |
1da177e4 LT |
152 | { |
153 | struct csr1212_keyval *kv; | |
154 | ||
c868ae2a | 155 | for (kv = kv_list->next; kv && (kv != kv_list); kv = kv->next) |
1da177e4 LT |
156 | if (kv->offset == offset) |
157 | return kv; | |
1da177e4 LT |
158 | return NULL; |
159 | } | |
160 | ||
161 | ||
162 | /* Creation Routines */ | |
6c88e475 | 163 | |
1da177e4 LT |
164 | struct csr1212_csr *csr1212_create_csr(struct csr1212_bus_ops *ops, |
165 | size_t bus_info_size, void *private) | |
166 | { | |
167 | struct csr1212_csr *csr; | |
168 | ||
169 | csr = CSR1212_MALLOC(sizeof(*csr)); | |
170 | if (!csr) | |
171 | return NULL; | |
172 | ||
173 | csr->cache_head = | |
174 | csr1212_rom_cache_malloc(CSR1212_CONFIG_ROM_SPACE_OFFSET, | |
175 | CSR1212_CONFIG_ROM_SPACE_SIZE); | |
176 | if (!csr->cache_head) { | |
177 | CSR1212_FREE(csr); | |
178 | return NULL; | |
179 | } | |
180 | ||
181 | /* The keyval key id is not used for the root node, but a valid key id | |
182 | * that can be used for a directory needs to be passed to | |
183 | * csr1212_new_directory(). */ | |
184 | csr->root_kv = csr1212_new_directory(CSR1212_KV_ID_VENDOR); | |
185 | if (!csr->root_kv) { | |
186 | CSR1212_FREE(csr->cache_head); | |
187 | CSR1212_FREE(csr); | |
188 | return NULL; | |
189 | } | |
190 | ||
191 | csr->bus_info_data = csr->cache_head->data; | |
192 | csr->bus_info_len = bus_info_size; | |
193 | csr->crc_len = bus_info_size; | |
194 | csr->ops = ops; | |
195 | csr->private = private; | |
196 | csr->cache_tail = csr->cache_head; | |
197 | ||
198 | return csr; | |
199 | } | |
200 | ||
1da177e4 | 201 | void csr1212_init_local_csr(struct csr1212_csr *csr, |
982610bd | 202 | const u32 *bus_info_data, int max_rom) |
1da177e4 LT |
203 | { |
204 | static const int mr_map[] = { 4, 64, 1024, 0 }; | |
205 | ||
1934b8b6 | 206 | BUG_ON(max_rom & ~0x3); |
1da177e4 LT |
207 | csr->max_rom = mr_map[max_rom]; |
208 | memcpy(csr->bus_info_data, bus_info_data, csr->bus_info_len); | |
209 | } | |
210 | ||
982610bd | 211 | static struct csr1212_keyval *csr1212_new_keyval(u8 type, u8 key) |
1da177e4 LT |
212 | { |
213 | struct csr1212_keyval *kv; | |
214 | ||
215 | if (key < 0x30 && ((csr1212_key_id_type_map[key] & (1 << type)) == 0)) | |
216 | return NULL; | |
217 | ||
218 | kv = CSR1212_MALLOC(sizeof(*kv)); | |
219 | if (!kv) | |
220 | return NULL; | |
221 | ||
17a19b79 | 222 | atomic_set(&kv->refcnt, 1); |
1da177e4 LT |
223 | kv->key.type = type; |
224 | kv->key.id = key; | |
1da177e4 | 225 | kv->associate = NULL; |
1da177e4 LT |
226 | kv->next = NULL; |
227 | kv->prev = NULL; | |
228 | kv->offset = 0; | |
229 | kv->valid = 0; | |
230 | return kv; | |
231 | } | |
232 | ||
982610bd | 233 | struct csr1212_keyval *csr1212_new_immediate(u8 key, u32 value) |
1da177e4 | 234 | { |
c868ae2a | 235 | struct csr1212_keyval *kv; |
1da177e4 | 236 | |
c868ae2a | 237 | kv = csr1212_new_keyval(CSR1212_KV_TYPE_IMMEDIATE, key); |
1da177e4 LT |
238 | if (!kv) |
239 | return NULL; | |
240 | ||
241 | kv->value.immediate = value; | |
242 | kv->valid = 1; | |
243 | return kv; | |
244 | } | |
245 | ||
6c88e475 | 246 | static struct csr1212_keyval * |
982610bd | 247 | csr1212_new_leaf(u8 key, const void *data, size_t data_len) |
1da177e4 | 248 | { |
c868ae2a | 249 | struct csr1212_keyval *kv; |
1da177e4 | 250 | |
c868ae2a | 251 | kv = csr1212_new_keyval(CSR1212_KV_TYPE_LEAF, key); |
1da177e4 LT |
252 | if (!kv) |
253 | return NULL; | |
254 | ||
255 | if (data_len > 0) { | |
256 | kv->value.leaf.data = CSR1212_MALLOC(data_len); | |
257 | if (!kv->value.leaf.data) { | |
258 | CSR1212_FREE(kv); | |
259 | return NULL; | |
260 | } | |
261 | ||
262 | if (data) | |
263 | memcpy(kv->value.leaf.data, data, data_len); | |
264 | } else { | |
265 | kv->value.leaf.data = NULL; | |
266 | } | |
267 | ||
268 | kv->value.leaf.len = bytes_to_quads(data_len); | |
269 | kv->offset = 0; | |
270 | kv->valid = 1; | |
271 | ||
272 | return kv; | |
273 | } | |
274 | ||
6c88e475 | 275 | static struct csr1212_keyval * |
982610bd | 276 | csr1212_new_csr_offset(u8 key, u32 csr_offset) |
1da177e4 | 277 | { |
c868ae2a | 278 | struct csr1212_keyval *kv; |
1da177e4 | 279 | |
c868ae2a | 280 | kv = csr1212_new_keyval(CSR1212_KV_TYPE_CSR_OFFSET, key); |
1da177e4 LT |
281 | if (!kv) |
282 | return NULL; | |
283 | ||
284 | kv->value.csr_offset = csr_offset; | |
285 | ||
286 | kv->offset = 0; | |
287 | kv->valid = 1; | |
288 | return kv; | |
289 | } | |
290 | ||
982610bd | 291 | struct csr1212_keyval *csr1212_new_directory(u8 key) |
1da177e4 | 292 | { |
c868ae2a | 293 | struct csr1212_keyval *kv; |
1da177e4 | 294 | |
c868ae2a | 295 | kv = csr1212_new_keyval(CSR1212_KV_TYPE_DIRECTORY, key); |
1da177e4 LT |
296 | if (!kv) |
297 | return NULL; | |
298 | ||
299 | kv->value.directory.len = 0; | |
300 | kv->offset = 0; | |
301 | kv->value.directory.dentries_head = NULL; | |
302 | kv->value.directory.dentries_tail = NULL; | |
303 | kv->valid = 1; | |
304 | return kv; | |
305 | } | |
306 | ||
64ff7123 SR |
307 | void csr1212_associate_keyval(struct csr1212_keyval *kv, |
308 | struct csr1212_keyval *associate) | |
1da177e4 | 309 | { |
64ff7123 SR |
310 | BUG_ON(!kv || !associate || kv->key.id == CSR1212_KV_ID_DESCRIPTOR || |
311 | (associate->key.id != CSR1212_KV_ID_DESCRIPTOR && | |
312 | associate->key.id != CSR1212_KV_ID_DEPENDENT_INFO && | |
313 | associate->key.id != CSR1212_KV_ID_EXTENDED_KEY && | |
314 | associate->key.id != CSR1212_KV_ID_EXTENDED_DATA && | |
315 | associate->key.id < 0x30) || | |
316 | (kv->key.id == CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID && | |
c868ae2a | 317 | associate->key.id != CSR1212_KV_ID_EXTENDED_KEY) || |
64ff7123 SR |
318 | (kv->key.id == CSR1212_KV_ID_EXTENDED_KEY && |
319 | associate->key.id != CSR1212_KV_ID_EXTENDED_DATA) || | |
320 | (associate->key.id == CSR1212_KV_ID_EXTENDED_KEY && | |
321 | kv->key.id != CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) || | |
322 | (associate->key.id == CSR1212_KV_ID_EXTENDED_DATA && | |
323 | kv->key.id != CSR1212_KV_ID_EXTENDED_KEY)); | |
1da177e4 LT |
324 | |
325 | if (kv->associate) | |
326 | csr1212_release_keyval(kv->associate); | |
327 | ||
17a19b79 | 328 | csr1212_keep_keyval(associate); |
1da177e4 | 329 | kv->associate = associate; |
1da177e4 LT |
330 | } |
331 | ||
17a19b79 SR |
332 | static int __csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir, |
333 | struct csr1212_keyval *kv, | |
334 | bool keep_keyval) | |
1da177e4 LT |
335 | { |
336 | struct csr1212_dentry *dentry; | |
337 | ||
64ff7123 | 338 | BUG_ON(!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY); |
1da177e4 LT |
339 | |
340 | dentry = CSR1212_MALLOC(sizeof(*dentry)); | |
341 | if (!dentry) | |
7fb9addb | 342 | return -ENOMEM; |
1da177e4 | 343 | |
17a19b79 SR |
344 | if (keep_keyval) |
345 | csr1212_keep_keyval(kv); | |
1da177e4 LT |
346 | dentry->kv = kv; |
347 | ||
1da177e4 LT |
348 | dentry->next = NULL; |
349 | dentry->prev = dir->value.directory.dentries_tail; | |
350 | ||
351 | if (!dir->value.directory.dentries_head) | |
352 | dir->value.directory.dentries_head = dentry; | |
353 | ||
354 | if (dir->value.directory.dentries_tail) | |
355 | dir->value.directory.dentries_tail->next = dentry; | |
356 | dir->value.directory.dentries_tail = dentry; | |
357 | ||
358 | return CSR1212_SUCCESS; | |
359 | } | |
360 | ||
17a19b79 SR |
361 | int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir, |
362 | struct csr1212_keyval *kv) | |
363 | { | |
364 | return __csr1212_attach_keyval_to_directory(dir, kv, true); | |
365 | } | |
366 | ||
6c88e475 SR |
367 | #define CSR1212_DESCRIPTOR_LEAF_DATA(kv) \ |
368 | (&((kv)->value.leaf.data[1])) | |
369 | ||
370 | #define CSR1212_DESCRIPTOR_LEAF_SET_TYPE(kv, type) \ | |
371 | ((kv)->value.leaf.data[0] = \ | |
7fb9addb SR |
372 | cpu_to_be32(CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) | \ |
373 | ((type) << CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT))) | |
6c88e475 SR |
374 | #define CSR1212_DESCRIPTOR_LEAF_SET_SPECIFIER_ID(kv, spec_id) \ |
375 | ((kv)->value.leaf.data[0] = \ | |
7fb9addb SR |
376 | cpu_to_be32((CSR1212_DESCRIPTOR_LEAF_TYPE(kv) << \ |
377 | CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT) | \ | |
378 | ((spec_id) & CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID_MASK))) | |
6c88e475 SR |
379 | |
380 | static struct csr1212_keyval * | |
982610bd | 381 | csr1212_new_descriptor_leaf(u8 dtype, u32 specifier_id, |
6c88e475 | 382 | const void *data, size_t data_len) |
1da177e4 LT |
383 | { |
384 | struct csr1212_keyval *kv; | |
385 | ||
386 | kv = csr1212_new_leaf(CSR1212_KV_ID_DESCRIPTOR, NULL, | |
387 | data_len + CSR1212_DESCRIPTOR_LEAF_OVERHEAD); | |
388 | if (!kv) | |
389 | return NULL; | |
390 | ||
96c25c81 | 391 | kmemcheck_annotate_variable(kv->value.leaf.data[0]); |
1da177e4 LT |
392 | CSR1212_DESCRIPTOR_LEAF_SET_TYPE(kv, dtype); |
393 | CSR1212_DESCRIPTOR_LEAF_SET_SPECIFIER_ID(kv, specifier_id); | |
394 | ||
a1c6250c | 395 | if (data) |
1da177e4 | 396 | memcpy(CSR1212_DESCRIPTOR_LEAF_DATA(kv), data, data_len); |
1da177e4 LT |
397 | |
398 | return kv; | |
399 | } | |
400 | ||
a1c6250c | 401 | /* Check if string conforms to minimal ASCII as per IEEE 1212 clause 7.4 */ |
1da177e4 LT |
402 | static int csr1212_check_minimal_ascii(const char *s) |
403 | { | |
404 | static const char minimal_ascii_table[] = { | |
a1c6250c SR |
405 | /* 1 2 4 8 16 32 64 128 */ |
406 | 128, /* --, --, --, --, --, --, --, 07, */ | |
407 | 4 + 16 + 32, /* --, --, 0a, --, 0C, 0D, --, --, */ | |
408 | 0, /* --, --, --, --, --, --, --, --, */ | |
409 | 0, /* --, --, --, --, --, --, --, --, */ | |
410 | 255 - 8 - 16, /* 20, 21, 22, --, --, 25, 26, 27, */ | |
411 | 255, /* 28, 29, 2a, 2b, 2c, 2d, 2e, 2f, */ | |
412 | 255, /* 30, 31, 32, 33, 34, 35, 36, 37, */ | |
413 | 255, /* 38, 39, 3a, 3b, 3c, 3d, 3e, 3f, */ | |
414 | 255, /* 40, 41, 42, 43, 44, 45, 46, 47, */ | |
415 | 255, /* 48, 49, 4a, 4b, 4c, 4d, 4e, 4f, */ | |
416 | 255, /* 50, 51, 52, 53, 54, 55, 56, 57, */ | |
417 | 1 + 2 + 4 + 128, /* 58, 59, 5a, --, --, --, --, 5f, */ | |
418 | 255 - 1, /* --, 61, 62, 63, 64, 65, 66, 67, */ | |
419 | 255, /* 68, 69, 6a, 6b, 6c, 6d, 6e, 6f, */ | |
420 | 255, /* 70, 71, 72, 73, 74, 75, 76, 77, */ | |
421 | 1 + 2 + 4, /* 78, 79, 7a, --, --, --, --, --, */ | |
1da177e4 | 422 | }; |
a1c6250c SR |
423 | int i, j; |
424 | ||
1da177e4 | 425 | for (; *s; s++) { |
a1c6250c SR |
426 | i = *s >> 3; /* i = *s / 8; */ |
427 | j = 1 << (*s & 3); /* j = 1 << (*s % 8); */ | |
428 | ||
429 | if (i >= ARRAY_SIZE(minimal_ascii_table) || | |
430 | !(minimal_ascii_table[i] & j)) | |
431 | return -EINVAL; | |
1da177e4 | 432 | } |
1da177e4 LT |
433 | return 0; |
434 | } | |
435 | ||
a1c6250c | 436 | /* IEEE 1212 clause 7.5.4.1 textual descriptors (English, minimal ASCII) */ |
1da177e4 LT |
437 | struct csr1212_keyval *csr1212_new_string_descriptor_leaf(const char *s) |
438 | { | |
a1c6250c SR |
439 | struct csr1212_keyval *kv; |
440 | u32 *text; | |
441 | size_t str_len, quads; | |
442 | ||
443 | if (!s || !*s || csr1212_check_minimal_ascii(s)) | |
444 | return NULL; | |
445 | ||
446 | str_len = strlen(s); | |
447 | quads = bytes_to_quads(str_len); | |
448 | kv = csr1212_new_descriptor_leaf(0, 0, NULL, quads_to_bytes(quads) + | |
449 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_OVERHEAD); | |
450 | if (!kv) | |
1da177e4 LT |
451 | return NULL; |
452 | ||
a1c6250c SR |
453 | kv->value.leaf.data[1] = 0; /* width, character_set, language */ |
454 | text = CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(kv); | |
455 | text[quads - 1] = 0; /* padding */ | |
456 | memcpy(text, s, str_len); | |
457 | ||
458 | return kv; | |
1da177e4 LT |
459 | } |
460 | ||
1da177e4 LT |
461 | |
462 | /* Destruction Routines */ | |
463 | ||
464 | void csr1212_detach_keyval_from_directory(struct csr1212_keyval *dir, | |
465 | struct csr1212_keyval *kv) | |
466 | { | |
467 | struct csr1212_dentry *dentry; | |
468 | ||
469 | if (!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY) | |
470 | return; | |
471 | ||
472 | dentry = csr1212_find_keyval(dir, kv); | |
473 | ||
474 | if (!dentry) | |
475 | return; | |
476 | ||
477 | if (dentry->prev) | |
478 | dentry->prev->next = dentry->next; | |
479 | if (dentry->next) | |
480 | dentry->next->prev = dentry->prev; | |
481 | if (dir->value.directory.dentries_head == dentry) | |
482 | dir->value.directory.dentries_head = dentry->next; | |
483 | if (dir->value.directory.dentries_tail == dentry) | |
484 | dir->value.directory.dentries_tail = dentry->prev; | |
485 | ||
486 | CSR1212_FREE(dentry); | |
487 | ||
488 | csr1212_release_keyval(kv); | |
489 | } | |
490 | ||
1da177e4 LT |
491 | /* This function is used to free the memory taken by a keyval. If the given |
492 | * keyval is a directory type, then any keyvals contained in that directory | |
17a19b79 | 493 | * will be destroyed as well if noone holds a reference on them. By means of |
1da177e4 LT |
494 | * list manipulation, this routine will descend a directory structure in a |
495 | * non-recursive manner. */ | |
17a19b79 | 496 | void csr1212_release_keyval(struct csr1212_keyval *kv) |
1da177e4 LT |
497 | { |
498 | struct csr1212_keyval *k, *a; | |
499 | struct csr1212_dentry dentry; | |
500 | struct csr1212_dentry *head, *tail; | |
501 | ||
17a19b79 SR |
502 | if (!atomic_dec_and_test(&kv->refcnt)) |
503 | return; | |
504 | ||
1da177e4 LT |
505 | dentry.kv = kv; |
506 | dentry.next = NULL; | |
507 | dentry.prev = NULL; | |
508 | ||
509 | head = &dentry; | |
510 | tail = head; | |
511 | ||
512 | while (head) { | |
513 | k = head->kv; | |
514 | ||
515 | while (k) { | |
17a19b79 SR |
516 | /* must not dec_and_test kv->refcnt again */ |
517 | if (k != kv && !atomic_dec_and_test(&k->refcnt)) | |
1da177e4 LT |
518 | break; |
519 | ||
520 | a = k->associate; | |
521 | ||
522 | if (k->key.type == CSR1212_KV_TYPE_DIRECTORY) { | |
c868ae2a | 523 | /* If the current entry is a directory, move all |
1da177e4 LT |
524 | * the entries to the destruction list. */ |
525 | if (k->value.directory.dentries_head) { | |
c868ae2a SR |
526 | tail->next = |
527 | k->value.directory.dentries_head; | |
528 | k->value.directory.dentries_head->prev = | |
529 | tail; | |
1da177e4 LT |
530 | tail = k->value.directory.dentries_tail; |
531 | } | |
532 | } | |
533 | free_keyval(k); | |
534 | k = a; | |
535 | } | |
536 | ||
537 | head = head->next; | |
538 | if (head) { | |
c868ae2a | 539 | if (head->prev && head->prev != &dentry) |
1da177e4 | 540 | CSR1212_FREE(head->prev); |
1da177e4 | 541 | head->prev = NULL; |
c868ae2a | 542 | } else if (tail != &dentry) { |
1da177e4 | 543 | CSR1212_FREE(tail); |
c868ae2a | 544 | } |
1da177e4 LT |
545 | } |
546 | } | |
547 | ||
1da177e4 LT |
548 | void csr1212_destroy_csr(struct csr1212_csr *csr) |
549 | { | |
550 | struct csr1212_csr_rom_cache *c, *oc; | |
551 | struct csr1212_cache_region *cr, *ocr; | |
552 | ||
553 | csr1212_release_keyval(csr->root_kv); | |
554 | ||
555 | c = csr->cache_head; | |
556 | while (c) { | |
557 | oc = c; | |
558 | cr = c->filled_head; | |
559 | while (cr) { | |
560 | ocr = cr; | |
561 | cr = cr->next; | |
562 | CSR1212_FREE(ocr); | |
563 | } | |
564 | c = c->next; | |
565 | CSR1212_FREE(oc); | |
566 | } | |
567 | ||
568 | CSR1212_FREE(csr); | |
569 | } | |
570 | ||
571 | ||
1da177e4 LT |
572 | /* CSR Image Creation */ |
573 | ||
574 | static int csr1212_append_new_cache(struct csr1212_csr *csr, size_t romsize) | |
575 | { | |
576 | struct csr1212_csr_rom_cache *cache; | |
982610bd | 577 | u64 csr_addr; |
1da177e4 | 578 | |
64ff7123 SR |
579 | BUG_ON(!csr || !csr->ops || !csr->ops->allocate_addr_range || |
580 | !csr->ops->release_addr || csr->max_rom < 1); | |
1da177e4 LT |
581 | |
582 | /* ROM size must be a multiple of csr->max_rom */ | |
583 | romsize = (romsize + (csr->max_rom - 1)) & ~(csr->max_rom - 1); | |
584 | ||
c868ae2a SR |
585 | csr_addr = csr->ops->allocate_addr_range(romsize, csr->max_rom, |
586 | csr->private); | |
587 | if (csr_addr == CSR1212_INVALID_ADDR_SPACE) | |
7fb9addb | 588 | return -ENOMEM; |
c868ae2a | 589 | |
1da177e4 LT |
590 | if (csr_addr < CSR1212_REGISTER_SPACE_BASE) { |
591 | /* Invalid address returned from allocate_addr_range(). */ | |
592 | csr->ops->release_addr(csr_addr, csr->private); | |
7fb9addb | 593 | return -ENOMEM; |
1da177e4 LT |
594 | } |
595 | ||
c868ae2a SR |
596 | cache = csr1212_rom_cache_malloc(csr_addr - CSR1212_REGISTER_SPACE_BASE, |
597 | romsize); | |
1da177e4 LT |
598 | if (!cache) { |
599 | csr->ops->release_addr(csr_addr, csr->private); | |
7fb9addb | 600 | return -ENOMEM; |
1da177e4 LT |
601 | } |
602 | ||
c868ae2a SR |
603 | cache->ext_rom = csr1212_new_keyval(CSR1212_KV_TYPE_LEAF, |
604 | CSR1212_KV_ID_EXTENDED_ROM); | |
1da177e4 LT |
605 | if (!cache->ext_rom) { |
606 | csr->ops->release_addr(csr_addr, csr->private); | |
607 | CSR1212_FREE(cache); | |
7fb9addb | 608 | return -ENOMEM; |
1da177e4 LT |
609 | } |
610 | ||
c868ae2a SR |
611 | if (csr1212_attach_keyval_to_directory(csr->root_kv, cache->ext_rom) != |
612 | CSR1212_SUCCESS) { | |
1da177e4 LT |
613 | csr1212_release_keyval(cache->ext_rom); |
614 | csr->ops->release_addr(csr_addr, csr->private); | |
615 | CSR1212_FREE(cache); | |
7fb9addb | 616 | return -ENOMEM; |
1da177e4 LT |
617 | } |
618 | cache->ext_rom->offset = csr_addr - CSR1212_REGISTER_SPACE_BASE; | |
619 | cache->ext_rom->value.leaf.len = -1; | |
620 | cache->ext_rom->value.leaf.data = cache->data; | |
621 | ||
622 | /* Add cache to tail of cache list */ | |
623 | cache->prev = csr->cache_tail; | |
624 | csr->cache_tail->next = cache; | |
625 | csr->cache_tail = cache; | |
626 | return CSR1212_SUCCESS; | |
627 | } | |
628 | ||
6c88e475 SR |
629 | static void csr1212_remove_cache(struct csr1212_csr *csr, |
630 | struct csr1212_csr_rom_cache *cache) | |
1da177e4 LT |
631 | { |
632 | if (csr->cache_head == cache) | |
633 | csr->cache_head = cache->next; | |
634 | if (csr->cache_tail == cache) | |
635 | csr->cache_tail = cache->prev; | |
636 | ||
637 | if (cache->prev) | |
638 | cache->prev->next = cache->next; | |
639 | if (cache->next) | |
640 | cache->next->prev = cache->prev; | |
641 | ||
642 | if (cache->ext_rom) { | |
c868ae2a SR |
643 | csr1212_detach_keyval_from_directory(csr->root_kv, |
644 | cache->ext_rom); | |
1da177e4 LT |
645 | csr1212_release_keyval(cache->ext_rom); |
646 | } | |
647 | ||
648 | CSR1212_FREE(cache); | |
649 | } | |
650 | ||
651 | static int csr1212_generate_layout_subdir(struct csr1212_keyval *dir, | |
652 | struct csr1212_keyval **layout_tail) | |
653 | { | |
654 | struct csr1212_dentry *dentry; | |
655 | struct csr1212_keyval *dkv; | |
656 | struct csr1212_keyval *last_extkey_spec = NULL; | |
657 | struct csr1212_keyval *last_extkey = NULL; | |
658 | int num_entries = 0; | |
659 | ||
660 | for (dentry = dir->value.directory.dentries_head; dentry; | |
661 | dentry = dentry->next) { | |
662 | for (dkv = dentry->kv; dkv; dkv = dkv->associate) { | |
663 | /* Special Case: Extended Key Specifier_ID */ | |
c868ae2a SR |
664 | if (dkv->key.id == |
665 | CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) { | |
666 | if (last_extkey_spec == NULL) | |
1da177e4 | 667 | last_extkey_spec = dkv; |
c868ae2a SR |
668 | else if (dkv->value.immediate != |
669 | last_extkey_spec->value.immediate) | |
1da177e4 | 670 | last_extkey_spec = dkv; |
c868ae2a | 671 | else |
1da177e4 | 672 | continue; |
1da177e4 LT |
673 | /* Special Case: Extended Key */ |
674 | } else if (dkv->key.id == CSR1212_KV_ID_EXTENDED_KEY) { | |
c868ae2a | 675 | if (last_extkey == NULL) |
1da177e4 | 676 | last_extkey = dkv; |
c868ae2a SR |
677 | else if (dkv->value.immediate != |
678 | last_extkey->value.immediate) | |
1da177e4 | 679 | last_extkey = dkv; |
c868ae2a | 680 | else |
1da177e4 | 681 | continue; |
1da177e4 LT |
682 | } |
683 | ||
684 | num_entries += 1; | |
685 | ||
c868ae2a | 686 | switch (dkv->key.type) { |
1da177e4 LT |
687 | default: |
688 | case CSR1212_KV_TYPE_IMMEDIATE: | |
689 | case CSR1212_KV_TYPE_CSR_OFFSET: | |
690 | break; | |
691 | case CSR1212_KV_TYPE_LEAF: | |
692 | case CSR1212_KV_TYPE_DIRECTORY: | |
693 | /* Remove from list */ | |
694 | if (dkv->prev && (dkv->prev->next == dkv)) | |
695 | dkv->prev->next = dkv->next; | |
696 | if (dkv->next && (dkv->next->prev == dkv)) | |
697 | dkv->next->prev = dkv->prev; | |
698 | //if (dkv == *layout_tail) | |
699 | // *layout_tail = dkv->prev; | |
700 | ||
701 | /* Special case: Extended ROM leafs */ | |
702 | if (dkv->key.id == CSR1212_KV_ID_EXTENDED_ROM) { | |
703 | dkv->value.leaf.len = -1; | |
c868ae2a SR |
704 | /* Don't add Extended ROM leafs in the |
705 | * layout list, they are handled | |
706 | * differently. */ | |
1da177e4 LT |
707 | break; |
708 | } | |
709 | ||
710 | /* Add to tail of list */ | |
711 | dkv->next = NULL; | |
712 | dkv->prev = *layout_tail; | |
713 | (*layout_tail)->next = dkv; | |
714 | *layout_tail = dkv; | |
715 | break; | |
716 | } | |
717 | } | |
718 | } | |
719 | return num_entries; | |
720 | } | |
721 | ||
6c88e475 | 722 | static size_t csr1212_generate_layout_order(struct csr1212_keyval *kv) |
1da177e4 LT |
723 | { |
724 | struct csr1212_keyval *ltail = kv; | |
725 | size_t agg_size = 0; | |
726 | ||
c868ae2a SR |
727 | while (kv) { |
728 | switch (kv->key.type) { | |
1da177e4 LT |
729 | case CSR1212_KV_TYPE_LEAF: |
730 | /* Add 1 quadlet for crc/len field */ | |
731 | agg_size += kv->value.leaf.len + 1; | |
732 | break; | |
733 | ||
734 | case CSR1212_KV_TYPE_DIRECTORY: | |
c868ae2a SR |
735 | kv->value.directory.len = |
736 | csr1212_generate_layout_subdir(kv, <ail); | |
1da177e4 LT |
737 | /* Add 1 quadlet for crc/len field */ |
738 | agg_size += kv->value.directory.len + 1; | |
739 | break; | |
740 | } | |
741 | kv = kv->next; | |
742 | } | |
743 | return quads_to_bytes(agg_size); | |
744 | } | |
745 | ||
6c88e475 SR |
746 | static struct csr1212_keyval * |
747 | csr1212_generate_positions(struct csr1212_csr_rom_cache *cache, | |
748 | struct csr1212_keyval *start_kv, int start_pos) | |
1da177e4 LT |
749 | { |
750 | struct csr1212_keyval *kv = start_kv; | |
751 | struct csr1212_keyval *okv = start_kv; | |
752 | int pos = start_pos; | |
753 | int kv_len = 0, okv_len = 0; | |
754 | ||
755 | cache->layout_head = kv; | |
756 | ||
c868ae2a | 757 | while (kv && pos < cache->size) { |
1da177e4 | 758 | /* Special case: Extended ROM leafs */ |
c868ae2a | 759 | if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) |
1da177e4 | 760 | kv->offset = cache->offset + pos; |
1da177e4 | 761 | |
c868ae2a | 762 | switch (kv->key.type) { |
1da177e4 LT |
763 | case CSR1212_KV_TYPE_LEAF: |
764 | kv_len = kv->value.leaf.len; | |
765 | break; | |
766 | ||
767 | case CSR1212_KV_TYPE_DIRECTORY: | |
768 | kv_len = kv->value.directory.len; | |
769 | break; | |
770 | ||
771 | default: | |
772 | /* Should never get here */ | |
c94ccf9e | 773 | WARN_ON(1); |
1da177e4 LT |
774 | break; |
775 | } | |
776 | ||
777 | pos += quads_to_bytes(kv_len + 1); | |
778 | ||
779 | if (pos <= cache->size) { | |
780 | okv = kv; | |
781 | okv_len = kv_len; | |
782 | kv = kv->next; | |
783 | } | |
784 | } | |
785 | ||
786 | cache->layout_tail = okv; | |
c868ae2a | 787 | cache->len = okv->offset - cache->offset + quads_to_bytes(okv_len + 1); |
1da177e4 LT |
788 | |
789 | return kv; | |
790 | } | |
791 | ||
6c88e475 SR |
792 | #define CSR1212_KV_KEY_SHIFT 24 |
793 | #define CSR1212_KV_KEY_TYPE_SHIFT 6 | |
794 | #define CSR1212_KV_KEY_ID_MASK 0x3f | |
795 | #define CSR1212_KV_KEY_TYPE_MASK 0x3 /* after shift */ | |
796 | ||
797 | static void | |
982610bd | 798 | csr1212_generate_tree_subdir(struct csr1212_keyval *dir, u32 *data_buffer) |
1da177e4 LT |
799 | { |
800 | struct csr1212_dentry *dentry; | |
801 | struct csr1212_keyval *last_extkey_spec = NULL; | |
802 | struct csr1212_keyval *last_extkey = NULL; | |
803 | int index = 0; | |
804 | ||
c868ae2a SR |
805 | for (dentry = dir->value.directory.dentries_head; |
806 | dentry; | |
807 | dentry = dentry->next) { | |
1da177e4 LT |
808 | struct csr1212_keyval *a; |
809 | ||
810 | for (a = dentry->kv; a; a = a->associate) { | |
982610bd | 811 | u32 value = 0; |
1da177e4 LT |
812 | |
813 | /* Special Case: Extended Key Specifier_ID */ | |
c868ae2a SR |
814 | if (a->key.id == |
815 | CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) { | |
816 | if (last_extkey_spec == NULL) | |
1da177e4 | 817 | last_extkey_spec = a; |
c868ae2a SR |
818 | else if (a->value.immediate != |
819 | last_extkey_spec->value.immediate) | |
1da177e4 | 820 | last_extkey_spec = a; |
c868ae2a | 821 | else |
1da177e4 | 822 | continue; |
c868ae2a | 823 | |
1da177e4 LT |
824 | /* Special Case: Extended Key */ |
825 | } else if (a->key.id == CSR1212_KV_ID_EXTENDED_KEY) { | |
c868ae2a | 826 | if (last_extkey == NULL) |
1da177e4 | 827 | last_extkey = a; |
c868ae2a SR |
828 | else if (a->value.immediate != |
829 | last_extkey->value.immediate) | |
1da177e4 | 830 | last_extkey = a; |
c868ae2a | 831 | else |
1da177e4 | 832 | continue; |
1da177e4 LT |
833 | } |
834 | ||
c868ae2a | 835 | switch (a->key.type) { |
1da177e4 LT |
836 | case CSR1212_KV_TYPE_IMMEDIATE: |
837 | value = a->value.immediate; | |
838 | break; | |
839 | case CSR1212_KV_TYPE_CSR_OFFSET: | |
840 | value = a->value.csr_offset; | |
841 | break; | |
842 | case CSR1212_KV_TYPE_LEAF: | |
843 | value = a->offset; | |
844 | value -= dir->offset + quads_to_bytes(1+index); | |
845 | value = bytes_to_quads(value); | |
846 | break; | |
847 | case CSR1212_KV_TYPE_DIRECTORY: | |
848 | value = a->offset; | |
849 | value -= dir->offset + quads_to_bytes(1+index); | |
850 | value = bytes_to_quads(value); | |
851 | break; | |
852 | default: | |
853 | /* Should never get here */ | |
c94ccf9e SR |
854 | WARN_ON(1); |
855 | break; | |
1da177e4 LT |
856 | } |
857 | ||
c868ae2a SR |
858 | value |= (a->key.id & CSR1212_KV_KEY_ID_MASK) << |
859 | CSR1212_KV_KEY_SHIFT; | |
1da177e4 | 860 | value |= (a->key.type & CSR1212_KV_KEY_TYPE_MASK) << |
c868ae2a SR |
861 | (CSR1212_KV_KEY_SHIFT + |
862 | CSR1212_KV_KEY_TYPE_SHIFT); | |
7fb9addb | 863 | data_buffer[index] = cpu_to_be32(value); |
1da177e4 LT |
864 | index++; |
865 | } | |
866 | } | |
867 | } | |
868 | ||
6c88e475 | 869 | struct csr1212_keyval_img { |
982610bd SR |
870 | u16 length; |
871 | u16 crc; | |
6c88e475 SR |
872 | |
873 | /* Must be last */ | |
982610bd | 874 | u32 data[0]; /* older gcc can't handle [] which is standard */ |
6c88e475 SR |
875 | }; |
876 | ||
877 | static void csr1212_fill_cache(struct csr1212_csr_rom_cache *cache) | |
1da177e4 LT |
878 | { |
879 | struct csr1212_keyval *kv, *nkv; | |
880 | struct csr1212_keyval_img *kvi; | |
881 | ||
c868ae2a SR |
882 | for (kv = cache->layout_head; |
883 | kv != cache->layout_tail->next; | |
884 | kv = nkv) { | |
885 | kvi = (struct csr1212_keyval_img *)(cache->data + | |
886 | bytes_to_quads(kv->offset - cache->offset)); | |
887 | switch (kv->key.type) { | |
1da177e4 LT |
888 | default: |
889 | case CSR1212_KV_TYPE_IMMEDIATE: | |
890 | case CSR1212_KV_TYPE_CSR_OFFSET: | |
891 | /* Should never get here */ | |
c94ccf9e SR |
892 | WARN_ON(1); |
893 | break; | |
1da177e4 LT |
894 | |
895 | case CSR1212_KV_TYPE_LEAF: | |
896 | /* Don't copy over Extended ROM areas, they are | |
897 | * already filled out! */ | |
898 | if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) | |
899 | memcpy(kvi->data, kv->value.leaf.data, | |
900 | quads_to_bytes(kv->value.leaf.len)); | |
901 | ||
7fb9addb | 902 | kvi->length = cpu_to_be16(kv->value.leaf.len); |
1da177e4 LT |
903 | kvi->crc = csr1212_crc16(kvi->data, kv->value.leaf.len); |
904 | break; | |
905 | ||
906 | case CSR1212_KV_TYPE_DIRECTORY: | |
907 | csr1212_generate_tree_subdir(kv, kvi->data); | |
908 | ||
7fb9addb | 909 | kvi->length = cpu_to_be16(kv->value.directory.len); |
c868ae2a SR |
910 | kvi->crc = csr1212_crc16(kvi->data, |
911 | kv->value.directory.len); | |
1da177e4 LT |
912 | break; |
913 | } | |
914 | ||
915 | nkv = kv->next; | |
916 | if (kv->prev) | |
917 | kv->prev->next = NULL; | |
918 | if (kv->next) | |
919 | kv->next->prev = NULL; | |
920 | kv->prev = NULL; | |
921 | kv->next = NULL; | |
922 | } | |
923 | } | |
924 | ||
fd2f3bdd SR |
925 | /* This size is arbitrarily chosen. |
926 | * The struct overhead is subtracted for more economic allocations. */ | |
927 | #define CSR1212_EXTENDED_ROM_SIZE (2048 - sizeof(struct csr1212_csr_rom_cache)) | |
6c88e475 | 928 | |
1da177e4 LT |
929 | int csr1212_generate_csr_image(struct csr1212_csr *csr) |
930 | { | |
931 | struct csr1212_bus_info_block_img *bi; | |
932 | struct csr1212_csr_rom_cache *cache; | |
933 | struct csr1212_keyval *kv; | |
934 | size_t agg_size; | |
935 | int ret; | |
936 | int init_offset; | |
937 | ||
64ff7123 | 938 | BUG_ON(!csr); |
1da177e4 LT |
939 | |
940 | cache = csr->cache_head; | |
941 | ||
942 | bi = (struct csr1212_bus_info_block_img*)cache->data; | |
943 | ||
944 | bi->length = bytes_to_quads(csr->bus_info_len) - 1; | |
945 | bi->crc_length = bi->length; | |
946 | bi->crc = csr1212_crc16(bi->data, bi->crc_length); | |
947 | ||
948 | csr->root_kv->next = NULL; | |
949 | csr->root_kv->prev = NULL; | |
950 | ||
951 | agg_size = csr1212_generate_layout_order(csr->root_kv); | |
952 | ||
953 | init_offset = csr->bus_info_len; | |
954 | ||
c868ae2a SR |
955 | for (kv = csr->root_kv, cache = csr->cache_head; |
956 | kv; | |
957 | cache = cache->next) { | |
1da177e4 LT |
958 | if (!cache) { |
959 | /* Estimate approximate number of additional cache | |
960 | * regions needed (it assumes that the cache holding | |
961 | * the first 1K Config ROM space always exists). */ | |
962 | int est_c = agg_size / (CSR1212_EXTENDED_ROM_SIZE - | |
982610bd | 963 | (2 * sizeof(u32))) + 1; |
1da177e4 LT |
964 | |
965 | /* Add additional cache regions, extras will be | |
966 | * removed later */ | |
967 | for (; est_c; est_c--) { | |
c868ae2a SR |
968 | ret = csr1212_append_new_cache(csr, |
969 | CSR1212_EXTENDED_ROM_SIZE); | |
1da177e4 LT |
970 | if (ret != CSR1212_SUCCESS) |
971 | return ret; | |
972 | } | |
973 | /* Need to re-layout for additional cache regions */ | |
974 | agg_size = csr1212_generate_layout_order(csr->root_kv); | |
975 | kv = csr->root_kv; | |
976 | cache = csr->cache_head; | |
977 | init_offset = csr->bus_info_len; | |
978 | } | |
979 | kv = csr1212_generate_positions(cache, kv, init_offset); | |
980 | agg_size -= cache->len; | |
982610bd | 981 | init_offset = sizeof(u32); |
1da177e4 LT |
982 | } |
983 | ||
984 | /* Remove unused, excess cache regions */ | |
985 | while (cache) { | |
986 | struct csr1212_csr_rom_cache *oc = cache; | |
987 | ||
988 | cache = cache->next; | |
989 | csr1212_remove_cache(csr, oc); | |
990 | } | |
991 | ||
992 | /* Go through the list backward so that when done, the correct CRC | |
993 | * will be calculated for the Extended ROM areas. */ | |
c868ae2a | 994 | for (cache = csr->cache_tail; cache; cache = cache->prev) { |
1da177e4 LT |
995 | /* Only Extended ROM caches should have this set. */ |
996 | if (cache->ext_rom) { | |
997 | int leaf_size; | |
998 | ||
999 | /* Make sure the Extended ROM leaf is a multiple of | |
1000 | * max_rom in size. */ | |
64ff7123 | 1001 | BUG_ON(csr->max_rom < 1); |
1da177e4 LT |
1002 | leaf_size = (cache->len + (csr->max_rom - 1)) & |
1003 | ~(csr->max_rom - 1); | |
1004 | ||
1005 | /* Zero out the unused ROM region */ | |
1006 | memset(cache->data + bytes_to_quads(cache->len), 0x00, | |
1007 | leaf_size - cache->len); | |
1008 | ||
1009 | /* Subtract leaf header */ | |
982610bd | 1010 | leaf_size -= sizeof(u32); |
1da177e4 LT |
1011 | |
1012 | /* Update the Extended ROM leaf length */ | |
1013 | cache->ext_rom->value.leaf.len = | |
1014 | bytes_to_quads(leaf_size); | |
1015 | } else { | |
1016 | /* Zero out the unused ROM region */ | |
1017 | memset(cache->data + bytes_to_quads(cache->len), 0x00, | |
1018 | cache->size - cache->len); | |
1019 | } | |
1020 | ||
1021 | /* Copy the data into the cache buffer */ | |
1022 | csr1212_fill_cache(cache); | |
1023 | ||
1024 | if (cache != csr->cache_head) { | |
1025 | /* Set the length and CRC of the extended ROM. */ | |
1026 | struct csr1212_keyval_img *kvi = | |
1027 | (struct csr1212_keyval_img*)cache->data; | |
982610bd | 1028 | u16 len = bytes_to_quads(cache->len) - 1; |
1da177e4 | 1029 | |
7fb9addb SR |
1030 | kvi->length = cpu_to_be16(len); |
1031 | kvi->crc = csr1212_crc16(kvi->data, len); | |
1da177e4 LT |
1032 | } |
1033 | } | |
1034 | ||
1035 | return CSR1212_SUCCESS; | |
1036 | } | |
1037 | ||
982610bd | 1038 | int csr1212_read(struct csr1212_csr *csr, u32 offset, void *buffer, u32 len) |
1da177e4 LT |
1039 | { |
1040 | struct csr1212_csr_rom_cache *cache; | |
1041 | ||
c868ae2a | 1042 | for (cache = csr->cache_head; cache; cache = cache->next) |
1da177e4 LT |
1043 | if (offset >= cache->offset && |
1044 | (offset + len) <= (cache->offset + cache->size)) { | |
c868ae2a SR |
1045 | memcpy(buffer, &cache->data[ |
1046 | bytes_to_quads(offset - cache->offset)], | |
1da177e4 LT |
1047 | len); |
1048 | return CSR1212_SUCCESS; | |
1049 | } | |
c868ae2a | 1050 | |
7fb9addb | 1051 | return -ENOENT; |
1da177e4 LT |
1052 | } |
1053 | ||
fde675fa SR |
1054 | /* |
1055 | * Apparently there are many different wrong implementations of the CRC | |
1056 | * algorithm. We don't fail, we just warn... approximately once per GUID. | |
1057 | */ | |
1058 | static void | |
1059 | csr1212_check_crc(const u32 *buffer, size_t length, u16 crc, __be32 *guid) | |
1060 | { | |
1061 | static u64 last_bad_eui64; | |
1062 | u64 eui64 = ((u64)be32_to_cpu(guid[0]) << 32) | be32_to_cpu(guid[1]); | |
1063 | ||
1064 | if (csr1212_crc16(buffer, length) == crc || | |
1065 | csr1212_msft_crc16(buffer, length) == crc || | |
1066 | eui64 == last_bad_eui64) | |
1067 | return; | |
1068 | ||
1069 | printk(KERN_DEBUG "ieee1394: config ROM CRC error\n"); | |
1070 | last_bad_eui64 = eui64; | |
1071 | } | |
1da177e4 | 1072 | |
1da177e4 LT |
1073 | /* Parse a chunk of data as a Config ROM */ |
1074 | ||
1075 | static int csr1212_parse_bus_info_block(struct csr1212_csr *csr) | |
1076 | { | |
1077 | struct csr1212_bus_info_block_img *bi; | |
1078 | struct csr1212_cache_region *cr; | |
1079 | int i; | |
1080 | int ret; | |
1081 | ||
982610bd | 1082 | for (i = 0; i < csr->bus_info_len; i += sizeof(u32)) { |
1da177e4 | 1083 | ret = csr->ops->bus_read(csr, CSR1212_CONFIG_ROM_SPACE_BASE + i, |
0bed1819 SR |
1084 | &csr->cache_head->data[bytes_to_quads(i)], |
1085 | csr->private); | |
1da177e4 LT |
1086 | if (ret != CSR1212_SUCCESS) |
1087 | return ret; | |
b2051f88 SR |
1088 | |
1089 | /* check ROM header's info_length */ | |
1090 | if (i == 0 && | |
7fb9addb | 1091 | be32_to_cpu(csr->cache_head->data[0]) >> 24 != |
b2051f88 | 1092 | bytes_to_quads(csr->bus_info_len) - 1) |
7fb9addb | 1093 | return -EINVAL; |
1da177e4 LT |
1094 | } |
1095 | ||
1096 | bi = (struct csr1212_bus_info_block_img*)csr->cache_head->data; | |
1097 | csr->crc_len = quads_to_bytes(bi->crc_length); | |
1098 | ||
c868ae2a SR |
1099 | /* IEEE 1212 recommends that crc_len be equal to bus_info_len, but that |
1100 | * is not always the case, so read the rest of the crc area 1 quadlet at | |
1101 | * a time. */ | |
982610bd | 1102 | for (i = csr->bus_info_len; i <= csr->crc_len; i += sizeof(u32)) { |
1da177e4 | 1103 | ret = csr->ops->bus_read(csr, CSR1212_CONFIG_ROM_SPACE_BASE + i, |
0bed1819 SR |
1104 | &csr->cache_head->data[bytes_to_quads(i)], |
1105 | csr->private); | |
1da177e4 LT |
1106 | if (ret != CSR1212_SUCCESS) |
1107 | return ret; | |
1108 | } | |
1109 | ||
fde675fa SR |
1110 | csr1212_check_crc(bi->data, bi->crc_length, bi->crc, |
1111 | &csr->bus_info_data[3]); | |
1da177e4 | 1112 | |
8551158a | 1113 | cr = CSR1212_MALLOC(sizeof(*cr)); |
1da177e4 | 1114 | if (!cr) |
7fb9addb | 1115 | return -ENOMEM; |
1da177e4 LT |
1116 | |
1117 | cr->next = NULL; | |
1118 | cr->prev = NULL; | |
1119 | cr->offset_start = 0; | |
1120 | cr->offset_end = csr->crc_len + 4; | |
1121 | ||
1122 | csr->cache_head->filled_head = cr; | |
1123 | csr->cache_head->filled_tail = cr; | |
1124 | ||
1125 | return CSR1212_SUCCESS; | |
1126 | } | |
1127 | ||
7fb9addb | 1128 | #define CSR1212_KV_KEY(q) (be32_to_cpu(q) >> CSR1212_KV_KEY_SHIFT) |
6c88e475 SR |
1129 | #define CSR1212_KV_KEY_TYPE(q) (CSR1212_KV_KEY(q) >> CSR1212_KV_KEY_TYPE_SHIFT) |
1130 | #define CSR1212_KV_KEY_ID(q) (CSR1212_KV_KEY(q) & CSR1212_KV_KEY_ID_MASK) | |
1131 | #define CSR1212_KV_VAL_MASK 0xffffff | |
7fb9addb | 1132 | #define CSR1212_KV_VAL(q) (be32_to_cpu(q) & CSR1212_KV_VAL_MASK) |
6c88e475 | 1133 | |
c868ae2a SR |
1134 | static int |
1135 | csr1212_parse_dir_entry(struct csr1212_keyval *dir, u32 ki, u32 kv_pos) | |
1da177e4 LT |
1136 | { |
1137 | int ret = CSR1212_SUCCESS; | |
1138 | struct csr1212_keyval *k = NULL; | |
982610bd | 1139 | u32 offset; |
17a19b79 | 1140 | bool keep_keyval = true; |
1da177e4 | 1141 | |
c868ae2a | 1142 | switch (CSR1212_KV_KEY_TYPE(ki)) { |
1da177e4 LT |
1143 | case CSR1212_KV_TYPE_IMMEDIATE: |
1144 | k = csr1212_new_immediate(CSR1212_KV_KEY_ID(ki), | |
1145 | CSR1212_KV_VAL(ki)); | |
1146 | if (!k) { | |
7fb9addb | 1147 | ret = -ENOMEM; |
511f7b32 | 1148 | goto out; |
1da177e4 | 1149 | } |
17a19b79 SR |
1150 | /* Don't keep local reference when parsing. */ |
1151 | keep_keyval = false; | |
1da177e4 LT |
1152 | break; |
1153 | ||
1154 | case CSR1212_KV_TYPE_CSR_OFFSET: | |
1155 | k = csr1212_new_csr_offset(CSR1212_KV_KEY_ID(ki), | |
1156 | CSR1212_KV_VAL(ki)); | |
1157 | if (!k) { | |
7fb9addb | 1158 | ret = -ENOMEM; |
511f7b32 | 1159 | goto out; |
1da177e4 | 1160 | } |
17a19b79 SR |
1161 | /* Don't keep local reference when parsing. */ |
1162 | keep_keyval = false; | |
1da177e4 LT |
1163 | break; |
1164 | ||
1165 | default: | |
1166 | /* Compute the offset from 0xffff f000 0000. */ | |
1167 | offset = quads_to_bytes(CSR1212_KV_VAL(ki)) + kv_pos; | |
1168 | if (offset == kv_pos) { | |
1169 | /* Uh-oh. Can't have a relative offset of 0 for Leaves | |
1170 | * or Directories. The Config ROM image is most likely | |
1171 | * messed up, so we'll just abort here. */ | |
7fb9addb | 1172 | ret = -EIO; |
511f7b32 | 1173 | goto out; |
1da177e4 LT |
1174 | } |
1175 | ||
1176 | k = csr1212_find_keyval_offset(dir, offset); | |
1177 | ||
1178 | if (k) | |
1179 | break; /* Found it. */ | |
1180 | ||
c868ae2a | 1181 | if (CSR1212_KV_KEY_TYPE(ki) == CSR1212_KV_TYPE_DIRECTORY) |
1da177e4 | 1182 | k = csr1212_new_directory(CSR1212_KV_KEY_ID(ki)); |
c868ae2a | 1183 | else |
1da177e4 | 1184 | k = csr1212_new_leaf(CSR1212_KV_KEY_ID(ki), NULL, 0); |
c868ae2a | 1185 | |
1da177e4 | 1186 | if (!k) { |
7fb9addb | 1187 | ret = -ENOMEM; |
511f7b32 | 1188 | goto out; |
1da177e4 | 1189 | } |
17a19b79 SR |
1190 | /* Don't keep local reference when parsing. */ |
1191 | keep_keyval = false; | |
1192 | /* Contents not read yet so it's not valid. */ | |
1193 | k->valid = 0; | |
1da177e4 LT |
1194 | k->offset = offset; |
1195 | ||
1196 | k->prev = dir; | |
1197 | k->next = dir->next; | |
1198 | dir->next->prev = k; | |
1199 | dir->next = k; | |
1200 | } | |
17a19b79 | 1201 | ret = __csr1212_attach_keyval_to_directory(dir, k, keep_keyval); |
511f7b32 | 1202 | out: |
6c88e475 SR |
1203 | if (ret != CSR1212_SUCCESS && k != NULL) |
1204 | free_keyval(k); | |
1da177e4 LT |
1205 | return ret; |
1206 | } | |
1207 | ||
1da177e4 LT |
1208 | int csr1212_parse_keyval(struct csr1212_keyval *kv, |
1209 | struct csr1212_csr_rom_cache *cache) | |
1210 | { | |
1211 | struct csr1212_keyval_img *kvi; | |
1212 | int i; | |
1213 | int ret = CSR1212_SUCCESS; | |
1214 | int kvi_len; | |
1215 | ||
c868ae2a SR |
1216 | kvi = (struct csr1212_keyval_img*) |
1217 | &cache->data[bytes_to_quads(kv->offset - cache->offset)]; | |
7fb9addb | 1218 | kvi_len = be16_to_cpu(kvi->length); |
1da177e4 | 1219 | |
fde675fa SR |
1220 | /* GUID is wrong in here in case of extended ROM. We don't care. */ |
1221 | csr1212_check_crc(kvi->data, kvi_len, kvi->crc, &cache->data[3]); | |
1da177e4 | 1222 | |
c868ae2a | 1223 | switch (kv->key.type) { |
1da177e4 LT |
1224 | case CSR1212_KV_TYPE_DIRECTORY: |
1225 | for (i = 0; i < kvi_len; i++) { | |
982610bd | 1226 | u32 ki = kvi->data[i]; |
1da177e4 LT |
1227 | |
1228 | /* Some devices put null entries in their unit | |
1229 | * directories. If we come across such an entry, | |
1230 | * then skip it. */ | |
1231 | if (ki == 0x0) | |
1232 | continue; | |
1233 | ret = csr1212_parse_dir_entry(kv, ki, | |
c868ae2a | 1234 | kv->offset + quads_to_bytes(i + 1)); |
1da177e4 LT |
1235 | } |
1236 | kv->value.directory.len = kvi_len; | |
1237 | break; | |
1238 | ||
1239 | case CSR1212_KV_TYPE_LEAF: | |
1240 | if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) { | |
c868ae2a SR |
1241 | size_t size = quads_to_bytes(kvi_len); |
1242 | ||
1243 | kv->value.leaf.data = CSR1212_MALLOC(size); | |
8551158a | 1244 | if (!kv->value.leaf.data) { |
7fb9addb | 1245 | ret = -ENOMEM; |
511f7b32 | 1246 | goto out; |
1da177e4 LT |
1247 | } |
1248 | ||
1249 | kv->value.leaf.len = kvi_len; | |
c868ae2a | 1250 | memcpy(kv->value.leaf.data, kvi->data, size); |
1da177e4 LT |
1251 | } |
1252 | break; | |
1253 | } | |
1254 | ||
1255 | kv->valid = 1; | |
511f7b32 | 1256 | out: |
1da177e4 LT |
1257 | return ret; |
1258 | } | |
1259 | ||
c1a37f2c SR |
1260 | static int |
1261 | csr1212_read_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv) | |
1da177e4 LT |
1262 | { |
1263 | struct csr1212_cache_region *cr, *ncr, *newcr = NULL; | |
1264 | struct csr1212_keyval_img *kvi = NULL; | |
1265 | struct csr1212_csr_rom_cache *cache; | |
1266 | int cache_index; | |
982610bd SR |
1267 | u64 addr; |
1268 | u32 *cache_ptr; | |
1269 | u16 kv_len = 0; | |
1da177e4 | 1270 | |
64ff7123 | 1271 | BUG_ON(!csr || !kv || csr->max_rom < 1); |
1da177e4 LT |
1272 | |
1273 | /* First find which cache the data should be in (or go in if not read | |
1274 | * yet). */ | |
c868ae2a | 1275 | for (cache = csr->cache_head; cache; cache = cache->next) |
1da177e4 LT |
1276 | if (kv->offset >= cache->offset && |
1277 | kv->offset < (cache->offset + cache->size)) | |
1278 | break; | |
1da177e4 LT |
1279 | |
1280 | if (!cache) { | |
982610bd | 1281 | u32 q, cache_size; |
1da177e4 LT |
1282 | |
1283 | /* Only create a new cache for Extended ROM leaves. */ | |
1284 | if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) | |
7fb9addb | 1285 | return -EINVAL; |
1da177e4 LT |
1286 | |
1287 | if (csr->ops->bus_read(csr, | |
1288 | CSR1212_REGISTER_SPACE_BASE + kv->offset, | |
0bed1819 | 1289 | &q, csr->private)) |
7fb9addb | 1290 | return -EIO; |
1da177e4 | 1291 | |
7fb9addb | 1292 | kv->value.leaf.len = be32_to_cpu(q) >> 16; |
1da177e4 LT |
1293 | |
1294 | cache_size = (quads_to_bytes(kv->value.leaf.len + 1) + | |
1295 | (csr->max_rom - 1)) & ~(csr->max_rom - 1); | |
1296 | ||
1297 | cache = csr1212_rom_cache_malloc(kv->offset, cache_size); | |
1298 | if (!cache) | |
7fb9addb | 1299 | return -ENOMEM; |
1da177e4 LT |
1300 | |
1301 | kv->value.leaf.data = &cache->data[1]; | |
1302 | csr->cache_tail->next = cache; | |
1303 | cache->prev = csr->cache_tail; | |
1304 | cache->next = NULL; | |
1305 | csr->cache_tail = cache; | |
1306 | cache->filled_head = | |
8551158a | 1307 | CSR1212_MALLOC(sizeof(*cache->filled_head)); |
c868ae2a | 1308 | if (!cache->filled_head) |
7fb9addb | 1309 | return -ENOMEM; |
1da177e4 LT |
1310 | |
1311 | cache->filled_head->offset_start = 0; | |
982610bd | 1312 | cache->filled_head->offset_end = sizeof(u32); |
1da177e4 LT |
1313 | cache->filled_tail = cache->filled_head; |
1314 | cache->filled_head->next = NULL; | |
1315 | cache->filled_head->prev = NULL; | |
1316 | cache->data[0] = q; | |
1317 | ||
1318 | /* Don't read the entire extended ROM now. Pieces of it will | |
1319 | * be read when entries inside it are read. */ | |
1320 | return csr1212_parse_keyval(kv, cache); | |
1321 | } | |
1322 | ||
1323 | cache_index = kv->offset - cache->offset; | |
1324 | ||
1325 | /* Now seach read portions of the cache to see if it is there. */ | |
1326 | for (cr = cache->filled_head; cr; cr = cr->next) { | |
1327 | if (cache_index < cr->offset_start) { | |
8551158a | 1328 | newcr = CSR1212_MALLOC(sizeof(*newcr)); |
1da177e4 | 1329 | if (!newcr) |
7fb9addb | 1330 | return -ENOMEM; |
1da177e4 LT |
1331 | |
1332 | newcr->offset_start = cache_index & ~(csr->max_rom - 1); | |
1333 | newcr->offset_end = newcr->offset_start; | |
1334 | newcr->next = cr; | |
1335 | newcr->prev = cr->prev; | |
1336 | cr->prev = newcr; | |
1337 | cr = newcr; | |
1338 | break; | |
1339 | } else if ((cache_index >= cr->offset_start) && | |
1340 | (cache_index < cr->offset_end)) { | |
1341 | kvi = (struct csr1212_keyval_img*) | |
1342 | (&cache->data[bytes_to_quads(cache_index)]); | |
7fb9addb | 1343 | kv_len = quads_to_bytes(be16_to_cpu(kvi->length) + 1); |
1da177e4 | 1344 | break; |
c868ae2a | 1345 | } else if (cache_index == cr->offset_end) { |
1da177e4 | 1346 | break; |
c868ae2a | 1347 | } |
1da177e4 LT |
1348 | } |
1349 | ||
1350 | if (!cr) { | |
1351 | cr = cache->filled_tail; | |
8551158a | 1352 | newcr = CSR1212_MALLOC(sizeof(*newcr)); |
1da177e4 | 1353 | if (!newcr) |
7fb9addb | 1354 | return -ENOMEM; |
1da177e4 LT |
1355 | |
1356 | newcr->offset_start = cache_index & ~(csr->max_rom - 1); | |
1357 | newcr->offset_end = newcr->offset_start; | |
1358 | newcr->prev = cr; | |
1359 | newcr->next = cr->next; | |
1360 | cr->next = newcr; | |
1361 | cr = newcr; | |
1362 | cache->filled_tail = newcr; | |
1363 | } | |
1364 | ||
1365 | while(!kvi || cr->offset_end < cache_index + kv_len) { | |
1366 | cache_ptr = &cache->data[bytes_to_quads(cr->offset_end & | |
1367 | ~(csr->max_rom - 1))]; | |
1368 | ||
1369 | addr = (CSR1212_CSR_ARCH_REG_SPACE_BASE + cache->offset + | |
1370 | cr->offset_end) & ~(csr->max_rom - 1); | |
1371 | ||
0bed1819 SR |
1372 | if (csr->ops->bus_read(csr, addr, cache_ptr, csr->private)) |
1373 | return -EIO; | |
1da177e4 LT |
1374 | |
1375 | cr->offset_end += csr->max_rom - (cr->offset_end & | |
1376 | (csr->max_rom - 1)); | |
1377 | ||
1378 | if (!kvi && (cr->offset_end > cache_index)) { | |
1379 | kvi = (struct csr1212_keyval_img*) | |
1380 | (&cache->data[bytes_to_quads(cache_index)]); | |
7fb9addb | 1381 | kv_len = quads_to_bytes(be16_to_cpu(kvi->length) + 1); |
1da177e4 LT |
1382 | } |
1383 | ||
1384 | if ((kv_len + (kv->offset - cache->offset)) > cache->size) { | |
1385 | /* The Leaf or Directory claims its length extends | |
1386 | * beyond the ConfigROM image region and thus beyond the | |
1387 | * end of our cache region. Therefore, we abort now | |
1388 | * rather than seg faulting later. */ | |
7fb9addb | 1389 | return -EIO; |
1da177e4 LT |
1390 | } |
1391 | ||
1392 | ncr = cr->next; | |
1393 | ||
1394 | if (ncr && (cr->offset_end >= ncr->offset_start)) { | |
1395 | /* consolidate region entries */ | |
1396 | ncr->offset_start = cr->offset_start; | |
1397 | ||
1398 | if (cr->prev) | |
1399 | cr->prev->next = cr->next; | |
1400 | ncr->prev = cr->prev; | |
1401 | if (cache->filled_head == cr) | |
1402 | cache->filled_head = ncr; | |
1403 | CSR1212_FREE(cr); | |
1404 | cr = ncr; | |
1405 | } | |
1406 | } | |
1407 | ||
1408 | return csr1212_parse_keyval(kv, cache); | |
1409 | } | |
1410 | ||
c1a37f2c SR |
1411 | struct csr1212_keyval * |
1412 | csr1212_get_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv) | |
1413 | { | |
1414 | if (!kv) | |
1415 | return NULL; | |
1416 | if (!kv->valid) | |
1417 | if (csr1212_read_keyval(csr, kv) != CSR1212_SUCCESS) | |
1418 | return NULL; | |
1419 | return kv; | |
1420 | } | |
1421 | ||
1da177e4 LT |
1422 | int csr1212_parse_csr(struct csr1212_csr *csr) |
1423 | { | |
1da177e4 LT |
1424 | struct csr1212_dentry *dentry; |
1425 | int ret; | |
1426 | ||
64ff7123 | 1427 | BUG_ON(!csr || !csr->ops || !csr->ops->bus_read); |
1da177e4 LT |
1428 | |
1429 | ret = csr1212_parse_bus_info_block(csr); | |
1430 | if (ret != CSR1212_SUCCESS) | |
1431 | return ret; | |
1432 | ||
0bed1819 SR |
1433 | /* |
1434 | * There has been a buggy firmware with bus_info_block.max_rom > 0 | |
1435 | * spotted which actually only supported quadlet read requests to the | |
1436 | * config ROM. Therefore read everything quadlet by quadlet regardless | |
1437 | * of what the bus info block says. | |
1438 | */ | |
1439 | csr->max_rom = 4; | |
1da177e4 LT |
1440 | |
1441 | csr->cache_head->layout_head = csr->root_kv; | |
1442 | csr->cache_head->layout_tail = csr->root_kv; | |
1443 | ||
1444 | csr->root_kv->offset = (CSR1212_CONFIG_ROM_SPACE_BASE & 0xffff) + | |
1445 | csr->bus_info_len; | |
1446 | ||
1447 | csr->root_kv->valid = 0; | |
1448 | csr->root_kv->next = csr->root_kv; | |
1449 | csr->root_kv->prev = csr->root_kv; | |
c1a37f2c | 1450 | ret = csr1212_read_keyval(csr, csr->root_kv); |
5303a986 JM |
1451 | if (ret != CSR1212_SUCCESS) |
1452 | return ret; | |
1da177e4 LT |
1453 | |
1454 | /* Scan through the Root directory finding all extended ROM regions | |
1455 | * and make cache regions for them */ | |
1456 | for (dentry = csr->root_kv->value.directory.dentries_head; | |
1457 | dentry; dentry = dentry->next) { | |
a96074e7 JM |
1458 | if (dentry->kv->key.id == CSR1212_KV_ID_EXTENDED_ROM && |
1459 | !dentry->kv->valid) { | |
c1a37f2c | 1460 | ret = csr1212_read_keyval(csr, dentry->kv); |
1da177e4 LT |
1461 | if (ret != CSR1212_SUCCESS) |
1462 | return ret; | |
1463 | } | |
1464 | } | |
1465 | ||
1466 | return CSR1212_SUCCESS; | |
1467 | } |