1 | // SPDX-License-Identifier: ISC |
---|---|
2 | /* |
3 | * Copyright (c) 2013 Broadcom Corporation |
4 | */ |
5 | |
6 | #include <linux/efi.h> |
7 | #include <linux/kernel.h> |
8 | #include <linux/slab.h> |
9 | #include <linux/device.h> |
10 | #include <linux/firmware.h> |
11 | #include <linux/module.h> |
12 | #include <linux/bcm47xx_nvram.h> |
13 | |
14 | #include "debug.h" |
15 | #include "firmware.h" |
16 | #include "core.h" |
17 | #include "common.h" |
18 | #include "chip.h" |
19 | |
20 | #define BRCMF_FW_MAX_NVRAM_SIZE 64000 |
21 | #define BRCMF_FW_NVRAM_DEVPATH_LEN 19 /* devpath0=pcie/1/4/ */ |
22 | #define BRCMF_FW_NVRAM_PCIEDEV_LEN 20 /* pcie/1/4/ + \0 */ |
23 | #define BRCMF_FW_DEFAULT_BOARDREV "boardrev=0xff" |
24 | #define BRCMF_FW_MACADDR_FMT "macaddr=%pM" |
25 | #define BRCMF_FW_MACADDR_LEN (7 + ETH_ALEN * 3) |
26 | |
27 | enum nvram_parser_state { |
28 | IDLE, |
29 | KEY, |
30 | VALUE, |
31 | COMMENT, |
32 | END |
33 | }; |
34 | |
35 | /** |
36 | * struct nvram_parser - internal info for parser. |
37 | * |
38 | * @state: current parser state. |
39 | * @data: input buffer being parsed. |
40 | * @nvram: output buffer with parse result. |
41 | * @nvram_len: length of parse result. |
42 | * @line: current line. |
43 | * @column: current column in line. |
44 | * @pos: byte offset in input buffer. |
45 | * @entry: start position of key,value entry. |
46 | * @multi_dev_v1: detect pcie multi device v1 (compressed). |
47 | * @multi_dev_v2: detect pcie multi device v2. |
48 | * @boardrev_found: nvram contains boardrev information. |
49 | * @strip_mac: strip the MAC address. |
50 | */ |
51 | struct nvram_parser { |
52 | enum nvram_parser_state state; |
53 | const u8 *data; |
54 | u8 *nvram; |
55 | u32 nvram_len; |
56 | u32 line; |
57 | u32 column; |
58 | u32 pos; |
59 | u32 entry; |
60 | bool multi_dev_v1; |
61 | bool multi_dev_v2; |
62 | bool boardrev_found; |
63 | bool strip_mac; |
64 | }; |
65 | |
66 | /* |
67 | * is_nvram_char() - check if char is a valid one for NVRAM entry |
68 | * |
69 | * It accepts all printable ASCII chars except for '#' which opens a comment. |
70 | * Please note that ' ' (space) while accepted is not a valid key name char. |
71 | */ |
72 | static bool is_nvram_char(char c) |
73 | { |
74 | /* comment marker excluded */ |
75 | if (c == '#') |
76 | return false; |
77 | |
78 | /* key and value may have any other readable character */ |
79 | return (c >= 0x20 && c < 0x7f); |
80 | } |
81 | |
82 | static bool is_whitespace(char c) |
83 | { |
84 | return (c == ' ' || c == '\r' || c == '\n' || c == '\t'); |
85 | } |
86 | |
87 | static enum nvram_parser_state brcmf_nvram_handle_idle(struct nvram_parser *nvp) |
88 | { |
89 | char c; |
90 | |
91 | c = nvp->data[nvp->pos]; |
92 | if (c == '\n') |
93 | return COMMENT; |
94 | if (is_whitespace(c) || c == '\0') |
95 | goto proceed; |
96 | if (c == '#') |
97 | return COMMENT; |
98 | if (is_nvram_char(c)) { |
99 | nvp->entry = nvp->pos; |
100 | return KEY; |
101 | } |
102 | brcmf_dbg(INFO, "warning: ln=%d:col=%d: ignoring invalid character\n", |
103 | nvp->line, nvp->column); |
104 | proceed: |
105 | nvp->column++; |
106 | nvp->pos++; |
107 | return IDLE; |
108 | } |
109 | |
110 | static enum nvram_parser_state brcmf_nvram_handle_key(struct nvram_parser *nvp) |
111 | { |
112 | enum nvram_parser_state st = nvp->state; |
113 | char c; |
114 | |
115 | c = nvp->data[nvp->pos]; |
116 | if (c == '=') { |
117 | /* ignore RAW1 by treating as comment */ |
118 | if (strncmp(&nvp->data[nvp->entry], "RAW1", 4) == 0) |
119 | st = COMMENT; |
120 | else |
121 | st = VALUE; |
122 | if (strncmp(&nvp->data[nvp->entry], "devpath", 7) == 0) |
123 | nvp->multi_dev_v1 = true; |
124 | if (strncmp(&nvp->data[nvp->entry], "pcie/", 5) == 0) |
125 | nvp->multi_dev_v2 = true; |
126 | if (strncmp(&nvp->data[nvp->entry], "boardrev", 8) == 0) |
127 | nvp->boardrev_found = true; |
128 | /* strip macaddr if platform MAC overrides */ |
129 | if (nvp->strip_mac && |
130 | strncmp(&nvp->data[nvp->entry], "macaddr", 7) == 0) |
131 | st = COMMENT; |
132 | } else if (!is_nvram_char(c) || c == ' ') { |
133 | brcmf_dbg(INFO, "warning: ln=%d:col=%d: '=' expected, skip invalid key entry\n", |
134 | nvp->line, nvp->column); |
135 | return COMMENT; |
136 | } |
137 | |
138 | nvp->column++; |
139 | nvp->pos++; |
140 | return st; |
141 | } |
142 | |
143 | static enum nvram_parser_state |
144 | brcmf_nvram_handle_value(struct nvram_parser *nvp) |
145 | { |
146 | char c; |
147 | char *skv; |
148 | char *ekv; |
149 | u32 cplen; |
150 | |
151 | c = nvp->data[nvp->pos]; |
152 | if (!is_nvram_char(c)) { |
153 | /* key,value pair complete */ |
154 | ekv = (u8 *)&nvp->data[nvp->pos]; |
155 | skv = (u8 *)&nvp->data[nvp->entry]; |
156 | cplen = ekv - skv; |
157 | if (nvp->nvram_len + cplen + 1 >= BRCMF_FW_MAX_NVRAM_SIZE) |
158 | return END; |
159 | /* copy to output buffer */ |
160 | memcpy(&nvp->nvram[nvp->nvram_len], skv, cplen); |
161 | nvp->nvram_len += cplen; |
162 | nvp->nvram[nvp->nvram_len] = '\0'; |
163 | nvp->nvram_len++; |
164 | return IDLE; |
165 | } |
166 | nvp->pos++; |
167 | nvp->column++; |
168 | return VALUE; |
169 | } |
170 | |
171 | static enum nvram_parser_state |
172 | brcmf_nvram_handle_comment(struct nvram_parser *nvp) |
173 | { |
174 | char *eoc, *sol; |
175 | |
176 | sol = (char *)&nvp->data[nvp->pos]; |
177 | eoc = strchr(sol, '\n'); |
178 | if (!eoc) { |
179 | eoc = strchr(sol, '\0'); |
180 | if (!eoc) |
181 | return END; |
182 | } |
183 | |
184 | /* eat all moving to next line */ |
185 | nvp->line++; |
186 | nvp->column = 1; |
187 | nvp->pos += (eoc - sol) + 1; |
188 | return IDLE; |
189 | } |
190 | |
191 | static enum nvram_parser_state brcmf_nvram_handle_end(struct nvram_parser *nvp) |
192 | { |
193 | /* final state */ |
194 | return END; |
195 | } |
196 | |
197 | static enum nvram_parser_state |
198 | (*nv_parser_states[])(struct nvram_parser *nvp) = { |
199 | brcmf_nvram_handle_idle, |
200 | brcmf_nvram_handle_key, |
201 | brcmf_nvram_handle_value, |
202 | brcmf_nvram_handle_comment, |
203 | brcmf_nvram_handle_end |
204 | }; |
205 | |
206 | static int brcmf_init_nvram_parser(struct nvram_parser *nvp, |
207 | const u8 *data, size_t data_len) |
208 | { |
209 | size_t size; |
210 | |
211 | memset(nvp, 0, sizeof(*nvp)); |
212 | nvp->data = data; |
213 | /* Limit size to MAX_NVRAM_SIZE, some files contain lot of comment */ |
214 | if (data_len > BRCMF_FW_MAX_NVRAM_SIZE) |
215 | size = BRCMF_FW_MAX_NVRAM_SIZE; |
216 | else |
217 | size = data_len; |
218 | /* Add space for properties we may add */ |
219 | size += strlen(BRCMF_FW_DEFAULT_BOARDREV) + 1; |
220 | size += BRCMF_FW_MACADDR_LEN + 1; |
221 | /* Alloc for extra 0 byte + roundup by 4 + length field */ |
222 | size += 1 + 3 + sizeof(u32); |
223 | nvp->nvram = kzalloc(size, GFP_KERNEL); |
224 | if (!nvp->nvram) |
225 | return -ENOMEM; |
226 | |
227 | nvp->line = 1; |
228 | nvp->column = 1; |
229 | return 0; |
230 | } |
231 | |
232 | /* brcmf_fw_strip_multi_v1 :Some nvram files contain settings for multiple |
233 | * devices. Strip it down for one device, use domain_nr/bus_nr to determine |
234 | * which data is to be returned. v1 is the version where nvram is stored |
235 | * compressed and "devpath" maps to index for valid entries. |
236 | */ |
237 | static void brcmf_fw_strip_multi_v1(struct nvram_parser *nvp, u16 domain_nr, |
238 | u16 bus_nr) |
239 | { |
240 | /* Device path with a leading '=' key-value separator */ |
241 | char pci_path[20]; |
242 | size_t pci_len; |
243 | char pcie_path[20]; |
244 | size_t pcie_len; |
245 | |
246 | u32 i, j; |
247 | bool found; |
248 | u8 *nvram; |
249 | u8 id; |
250 | |
251 | nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL); |
252 | if (!nvram) |
253 | goto fail; |
254 | |
255 | /* min length: devpath0=pcie/1/4/ + 0:x=y */ |
256 | if (nvp->nvram_len < BRCMF_FW_NVRAM_DEVPATH_LEN + 6) |
257 | goto fail; |
258 | |
259 | /* First search for the devpathX and see if it is the configuration |
260 | * for domain_nr/bus_nr. Search complete nvp |
261 | */ |
262 | snprintf(buf: pci_path, size: sizeof(pci_path), fmt: "=pci/%d/%d", domain_nr, |
263 | bus_nr); |
264 | pci_len = strlen(pci_path); |
265 | snprintf(buf: pcie_path, size: sizeof(pcie_path), fmt: "=pcie/%d/%d", domain_nr, |
266 | bus_nr); |
267 | pcie_len = strlen(pcie_path); |
268 | found = false; |
269 | i = 0; |
270 | while (i < nvp->nvram_len - BRCMF_FW_NVRAM_DEVPATH_LEN) { |
271 | /* Format: devpathX=pcie/Y/Z/ |
272 | * Y = domain_nr, Z = bus_nr, X = virtual ID |
273 | */ |
274 | if (strncmp(&nvp->nvram[i], "devpath", 7) == 0 && |
275 | (!strncmp(&nvp->nvram[i + 8], pci_path, pci_len) || |
276 | !strncmp(&nvp->nvram[i + 8], pcie_path, pcie_len))) { |
277 | id = nvp->nvram[i + 7] - '0'; |
278 | found = true; |
279 | break; |
280 | } |
281 | while (nvp->nvram[i] != 0) |
282 | i++; |
283 | i++; |
284 | } |
285 | if (!found) |
286 | goto fail; |
287 | |
288 | /* Now copy all valid entries, release old nvram and assign new one */ |
289 | i = 0; |
290 | j = 0; |
291 | while (i < nvp->nvram_len) { |
292 | if ((nvp->nvram[i] - '0' == id) && (nvp->nvram[i + 1] == ':')) { |
293 | i += 2; |
294 | if (strncmp(&nvp->nvram[i], "boardrev", 8) == 0) |
295 | nvp->boardrev_found = true; |
296 | while (nvp->nvram[i] != 0) { |
297 | nvram[j] = nvp->nvram[i]; |
298 | i++; |
299 | j++; |
300 | } |
301 | nvram[j] = 0; |
302 | j++; |
303 | } |
304 | while (nvp->nvram[i] != 0) |
305 | i++; |
306 | i++; |
307 | } |
308 | kfree(objp: nvp->nvram); |
309 | nvp->nvram = nvram; |
310 | nvp->nvram_len = j; |
311 | return; |
312 | |
313 | fail: |
314 | kfree(objp: nvram); |
315 | nvp->nvram_len = 0; |
316 | } |
317 | |
318 | /* brcmf_fw_strip_multi_v2 :Some nvram files contain settings for multiple |
319 | * devices. Strip it down for one device, use domain_nr/bus_nr to determine |
320 | * which data is to be returned. v2 is the version where nvram is stored |
321 | * uncompressed, all relevant valid entries are identified by |
322 | * pcie/domain_nr/bus_nr: |
323 | */ |
324 | static void brcmf_fw_strip_multi_v2(struct nvram_parser *nvp, u16 domain_nr, |
325 | u16 bus_nr) |
326 | { |
327 | char prefix[BRCMF_FW_NVRAM_PCIEDEV_LEN]; |
328 | size_t len; |
329 | u32 i, j; |
330 | u8 *nvram; |
331 | |
332 | nvram = kzalloc(nvp->nvram_len + 1 + 3 + sizeof(u32), GFP_KERNEL); |
333 | if (!nvram) { |
334 | nvp->nvram_len = 0; |
335 | return; |
336 | } |
337 | |
338 | /* Copy all valid entries, release old nvram and assign new one. |
339 | * Valid entries are of type pcie/X/Y/ where X = domain_nr and |
340 | * Y = bus_nr. |
341 | */ |
342 | snprintf(buf: prefix, size: sizeof(prefix), fmt: "pcie/%d/%d/", domain_nr, bus_nr); |
343 | len = strlen(prefix); |
344 | i = 0; |
345 | j = 0; |
346 | while (i < nvp->nvram_len - len) { |
347 | if (strncmp(&nvp->nvram[i], prefix, len) == 0) { |
348 | i += len; |
349 | if (strncmp(&nvp->nvram[i], "boardrev", 8) == 0) |
350 | nvp->boardrev_found = true; |
351 | while (nvp->nvram[i] != 0) { |
352 | nvram[j] = nvp->nvram[i]; |
353 | i++; |
354 | j++; |
355 | } |
356 | nvram[j] = 0; |
357 | j++; |
358 | } |
359 | while (nvp->nvram[i] != 0) |
360 | i++; |
361 | i++; |
362 | } |
363 | kfree(objp: nvp->nvram); |
364 | nvp->nvram = nvram; |
365 | nvp->nvram_len = j; |
366 | } |
367 | |
368 | static void brcmf_fw_add_defaults(struct nvram_parser *nvp) |
369 | { |
370 | if (nvp->boardrev_found) |
371 | return; |
372 | |
373 | memcpy(&nvp->nvram[nvp->nvram_len], &BRCMF_FW_DEFAULT_BOARDREV, |
374 | strlen(BRCMF_FW_DEFAULT_BOARDREV)); |
375 | nvp->nvram_len += strlen(BRCMF_FW_DEFAULT_BOARDREV); |
376 | nvp->nvram[nvp->nvram_len] = '\0'; |
377 | nvp->nvram_len++; |
378 | } |
379 | |
380 | static void brcmf_fw_add_macaddr(struct nvram_parser *nvp, u8 *mac) |
381 | { |
382 | int len; |
383 | |
384 | len = scnprintf(buf: &nvp->nvram[nvp->nvram_len], BRCMF_FW_MACADDR_LEN + 1, |
385 | BRCMF_FW_MACADDR_FMT, mac); |
386 | WARN_ON(len != BRCMF_FW_MACADDR_LEN); |
387 | nvp->nvram_len += len + 1; |
388 | } |
389 | |
390 | /* brcmf_nvram_strip :Takes a buffer of "<var>=<value>\n" lines read from a fil |
391 | * and ending in a NUL. Removes carriage returns, empty lines, comment lines, |
392 | * and converts newlines to NULs. Shortens buffer as needed and pads with NULs. |
393 | * End of buffer is completed with token identifying length of buffer. |
394 | */ |
395 | static void *brcmf_fw_nvram_strip(const u8 *data, size_t data_len, |
396 | u32 *new_length, u16 domain_nr, u16 bus_nr, |
397 | struct device *dev) |
398 | { |
399 | struct nvram_parser nvp; |
400 | u32 pad; |
401 | u32 token; |
402 | __le32 token_le; |
403 | u8 mac[ETH_ALEN]; |
404 | |
405 | if (brcmf_init_nvram_parser(nvp: &nvp, data, data_len) < 0) |
406 | return NULL; |
407 | |
408 | if (eth_platform_get_mac_address(dev, mac_addr: mac) == 0) |
409 | nvp.strip_mac = true; |
410 | |
411 | while (nvp.pos < data_len) { |
412 | nvp.state = nv_parser_states[nvp.state](&nvp); |
413 | if (nvp.state == END) |
414 | break; |
415 | } |
416 | if (nvp.multi_dev_v1) { |
417 | nvp.boardrev_found = false; |
418 | brcmf_fw_strip_multi_v1(nvp: &nvp, domain_nr, bus_nr); |
419 | } else if (nvp.multi_dev_v2) { |
420 | nvp.boardrev_found = false; |
421 | brcmf_fw_strip_multi_v2(nvp: &nvp, domain_nr, bus_nr); |
422 | } |
423 | |
424 | if (nvp.nvram_len == 0) { |
425 | kfree(objp: nvp.nvram); |
426 | return NULL; |
427 | } |
428 | |
429 | brcmf_fw_add_defaults(nvp: &nvp); |
430 | |
431 | if (nvp.strip_mac) |
432 | brcmf_fw_add_macaddr(nvp: &nvp, mac); |
433 | |
434 | pad = nvp.nvram_len; |
435 | *new_length = roundup(nvp.nvram_len + 1, 4); |
436 | while (pad != *new_length) { |
437 | nvp.nvram[pad] = 0; |
438 | pad++; |
439 | } |
440 | |
441 | token = *new_length / 4; |
442 | token = (~token << 16) | (token & 0x0000FFFF); |
443 | token_le = cpu_to_le32(token); |
444 | |
445 | memcpy(&nvp.nvram[*new_length], &token_le, sizeof(token_le)); |
446 | *new_length += sizeof(token_le); |
447 | |
448 | return nvp.nvram; |
449 | } |
450 | |
451 | void brcmf_fw_nvram_free(void *nvram) |
452 | { |
453 | kfree(objp: nvram); |
454 | } |
455 | |
456 | struct brcmf_fw { |
457 | struct device *dev; |
458 | struct brcmf_fw_request *req; |
459 | u32 curpos; |
460 | unsigned int board_index; |
461 | void (*done)(struct device *dev, int err, struct brcmf_fw_request *req); |
462 | }; |
463 | |
464 | #ifdef CONFIG_EFI |
465 | /* In some cases the EFI-var stored nvram contains "ccode=ALL" or "ccode=XV" |
466 | * to specify "worldwide" compatible settings, but these 2 ccode-s do not work |
467 | * properly. "ccode=ALL" causes channels 12 and 13 to not be available, |
468 | * "ccode=XV" causes all 5GHz channels to not be available. So we replace both |
469 | * with "ccode=X2" which allows channels 12+13 and 5Ghz channels in |
470 | * no-Initiate-Radiation mode. This means that we will never send on these |
471 | * channels without first having received valid wifi traffic on the channel. |
472 | */ |
473 | static void brcmf_fw_fix_efi_nvram_ccode(char *data, unsigned long data_len) |
474 | { |
475 | char *ccode; |
476 | |
477 | ccode = strnstr((char *)data, "ccode=ALL", data_len); |
478 | if (!ccode) |
479 | ccode = strnstr((char *)data, "ccode=XV\r", data_len); |
480 | if (!ccode) |
481 | return; |
482 | |
483 | ccode[6] = 'X'; |
484 | ccode[7] = '2'; |
485 | ccode[8] = '\r'; |
486 | } |
487 | |
488 | static u8 *brcmf_fw_nvram_from_efi(size_t *data_len_ret) |
489 | { |
490 | efi_guid_t guid = EFI_GUID(0x74b00bd9, 0x805a, 0x4d61, 0xb5, 0x1f, |
491 | 0x43, 0x26, 0x81, 0x23, 0xd1, 0x13); |
492 | unsigned long data_len = 0; |
493 | efi_status_t status; |
494 | u8 *data = NULL; |
495 | |
496 | if (!efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) |
497 | return NULL; |
498 | |
499 | status = efi.get_variable(L"nvram", &guid, NULL, &data_len, NULL); |
500 | if (status != EFI_BUFFER_TOO_SMALL) |
501 | goto fail; |
502 | |
503 | data = kmalloc(data_len, GFP_KERNEL); |
504 | if (!data) |
505 | goto fail; |
506 | |
507 | status = efi.get_variable(L"nvram", &guid, NULL, &data_len, data); |
508 | if (status != EFI_SUCCESS) |
509 | goto fail; |
510 | |
511 | brcmf_fw_fix_efi_nvram_ccode(data, data_len); |
512 | brcmf_info("Using nvram EFI variable\n"); |
513 | |
514 | *data_len_ret = data_len; |
515 | return data; |
516 | fail: |
517 | kfree(objp: data); |
518 | return NULL; |
519 | } |
520 | #else |
521 | static inline u8 *brcmf_fw_nvram_from_efi(size_t *data_len) { return NULL; } |
522 | #endif |
523 | |
524 | static void brcmf_fw_free_request(struct brcmf_fw_request *req) |
525 | { |
526 | struct brcmf_fw_item *item; |
527 | int i; |
528 | |
529 | for (i = 0, item = &req->items[0]; i < req->n_items; i++, item++) { |
530 | if (item->type == BRCMF_FW_TYPE_BINARY) |
531 | release_firmware(fw: item->binary); |
532 | else if (item->type == BRCMF_FW_TYPE_NVRAM) |
533 | brcmf_fw_nvram_free(nvram: item->nv_data.data); |
534 | } |
535 | kfree(objp: req); |
536 | } |
537 | |
538 | static int brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx) |
539 | { |
540 | struct brcmf_fw *fwctx = ctx; |
541 | struct brcmf_fw_item *cur; |
542 | bool free_bcm47xx_nvram = false; |
543 | bool kfree_nvram = false; |
544 | u32 nvram_length = 0; |
545 | void *nvram = NULL; |
546 | u8 *data = NULL; |
547 | size_t data_len; |
548 | |
549 | brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(fwctx->dev)); |
550 | |
551 | cur = &fwctx->req->items[fwctx->curpos]; |
552 | |
553 | if (fw && fw->data) { |
554 | data = (u8 *)fw->data; |
555 | data_len = fw->size; |
556 | } else { |
557 | if ((data = bcm47xx_nvram_get_contents(val_len: &data_len))) |
558 | free_bcm47xx_nvram = true; |
559 | else if ((data = brcmf_fw_nvram_from_efi(data_len_ret: &data_len))) |
560 | kfree_nvram = true; |
561 | else if (!(cur->flags & BRCMF_FW_REQF_OPTIONAL)) |
562 | goto fail; |
563 | } |
564 | |
565 | if (data) |
566 | nvram = brcmf_fw_nvram_strip(data, data_len, new_length: &nvram_length, |
567 | domain_nr: fwctx->req->domain_nr, |
568 | bus_nr: fwctx->req->bus_nr, |
569 | dev: fwctx->dev); |
570 | |
571 | if (free_bcm47xx_nvram) |
572 | bcm47xx_nvram_release_contents(nvram: data); |
573 | if (kfree_nvram) |
574 | kfree(objp: data); |
575 | |
576 | release_firmware(fw); |
577 | if (!nvram && !(cur->flags & BRCMF_FW_REQF_OPTIONAL)) |
578 | goto fail; |
579 | |
580 | brcmf_dbg(TRACE, "nvram %p len %d\n", nvram, nvram_length); |
581 | cur->nv_data.data = nvram; |
582 | cur->nv_data.len = nvram_length; |
583 | return 0; |
584 | |
585 | fail: |
586 | return -ENOENT; |
587 | } |
588 | |
589 | static int brcmf_fw_complete_request(const struct firmware *fw, |
590 | struct brcmf_fw *fwctx) |
591 | { |
592 | struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos]; |
593 | int ret = 0; |
594 | |
595 | brcmf_dbg(TRACE, "firmware %s %sfound\n", cur->path, fw ? "": "not "); |
596 | |
597 | switch (cur->type) { |
598 | case BRCMF_FW_TYPE_NVRAM: |
599 | ret = brcmf_fw_request_nvram_done(fw, ctx: fwctx); |
600 | break; |
601 | case BRCMF_FW_TYPE_BINARY: |
602 | if (fw) |
603 | cur->binary = fw; |
604 | else |
605 | ret = -ENOENT; |
606 | break; |
607 | default: |
608 | /* something fishy here so bail out early */ |
609 | brcmf_err("unknown fw type: %d\n", cur->type); |
610 | release_firmware(fw); |
611 | ret = -EINVAL; |
612 | } |
613 | |
614 | return (cur->flags & BRCMF_FW_REQF_OPTIONAL) ? 0 : ret; |
615 | } |
616 | |
617 | static char *brcm_alt_fw_path(const char *path, const char *board_type) |
618 | { |
619 | char base[BRCMF_FW_NAME_LEN]; |
620 | const char *suffix; |
621 | char *ret; |
622 | |
623 | if (!board_type) |
624 | return NULL; |
625 | |
626 | suffix = strrchr(path, '.'); |
627 | if (!suffix || suffix == path) |
628 | return NULL; |
629 | |
630 | /* strip extension at the end */ |
631 | strscpy(base, path, BRCMF_FW_NAME_LEN); |
632 | base[suffix - path] = 0; |
633 | |
634 | ret = kasprintf(GFP_KERNEL, fmt: "%s.%s%s", base, board_type, suffix); |
635 | if (!ret) |
636 | brcmf_err("out of memory allocating firmware path for '%s'\n", |
637 | path); |
638 | |
639 | brcmf_dbg(TRACE, "FW alt path: %s\n", ret); |
640 | |
641 | return ret; |
642 | } |
643 | |
644 | static int brcmf_fw_request_firmware(const struct firmware **fw, |
645 | struct brcmf_fw *fwctx) |
646 | { |
647 | struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos]; |
648 | unsigned int i; |
649 | int ret; |
650 | |
651 | /* Files can be board-specific, first try board-specific paths */ |
652 | for (i = 0; i < ARRAY_SIZE(fwctx->req->board_types); i++) { |
653 | char *alt_path; |
654 | |
655 | if (!fwctx->req->board_types[i]) |
656 | goto fallback; |
657 | alt_path = brcm_alt_fw_path(path: cur->path, |
658 | board_type: fwctx->req->board_types[i]); |
659 | if (!alt_path) |
660 | goto fallback; |
661 | |
662 | ret = firmware_request_nowarn(fw, name: alt_path, device: fwctx->dev); |
663 | kfree(objp: alt_path); |
664 | if (ret == 0) |
665 | return ret; |
666 | } |
667 | |
668 | fallback: |
669 | return request_firmware(fw, name: cur->path, device: fwctx->dev); |
670 | } |
671 | |
672 | static void brcmf_fw_request_done(const struct firmware *fw, void *ctx) |
673 | { |
674 | struct brcmf_fw *fwctx = ctx; |
675 | int ret; |
676 | |
677 | ret = brcmf_fw_complete_request(fw, fwctx); |
678 | |
679 | while (ret == 0 && ++fwctx->curpos < fwctx->req->n_items) { |
680 | brcmf_fw_request_firmware(fw: &fw, fwctx); |
681 | ret = brcmf_fw_complete_request(fw, fwctx: ctx); |
682 | } |
683 | |
684 | if (ret) { |
685 | brcmf_fw_free_request(req: fwctx->req); |
686 | fwctx->req = NULL; |
687 | } |
688 | fwctx->done(fwctx->dev, ret, fwctx->req); |
689 | kfree(objp: fwctx); |
690 | } |
691 | |
692 | static void brcmf_fw_request_done_alt_path(const struct firmware *fw, void *ctx) |
693 | { |
694 | struct brcmf_fw *fwctx = ctx; |
695 | struct brcmf_fw_item *first = &fwctx->req->items[0]; |
696 | const char *board_type, *alt_path; |
697 | int ret = 0; |
698 | |
699 | if (fw) { |
700 | brcmf_fw_request_done(fw, ctx); |
701 | return; |
702 | } |
703 | |
704 | /* Try next board firmware */ |
705 | if (fwctx->board_index < ARRAY_SIZE(fwctx->req->board_types)) { |
706 | board_type = fwctx->req->board_types[fwctx->board_index++]; |
707 | if (!board_type) |
708 | goto fallback; |
709 | alt_path = brcm_alt_fw_path(path: first->path, board_type); |
710 | if (!alt_path) |
711 | goto fallback; |
712 | |
713 | ret = request_firmware_nowait(THIS_MODULE, uevent: true, name: alt_path, |
714 | device: fwctx->dev, GFP_KERNEL, context: fwctx, |
715 | cont: brcmf_fw_request_done_alt_path); |
716 | kfree(objp: alt_path); |
717 | |
718 | if (ret < 0) |
719 | brcmf_fw_request_done(fw, ctx); |
720 | return; |
721 | } |
722 | |
723 | fallback: |
724 | /* Fall back to canonical path if board firmware not found */ |
725 | ret = request_firmware_nowait(THIS_MODULE, uevent: true, name: first->path, |
726 | device: fwctx->dev, GFP_KERNEL, context: fwctx, |
727 | cont: brcmf_fw_request_done); |
728 | |
729 | if (ret < 0) |
730 | brcmf_fw_request_done(fw, ctx); |
731 | } |
732 | |
733 | static bool brcmf_fw_request_is_valid(struct brcmf_fw_request *req) |
734 | { |
735 | struct brcmf_fw_item *item; |
736 | int i; |
737 | |
738 | if (!req->n_items) |
739 | return false; |
740 | |
741 | for (i = 0, item = &req->items[0]; i < req->n_items; i++, item++) { |
742 | if (!item->path) |
743 | return false; |
744 | } |
745 | return true; |
746 | } |
747 | |
748 | int brcmf_fw_get_firmwares(struct device *dev, struct brcmf_fw_request *req, |
749 | void (*fw_cb)(struct device *dev, int err, |
750 | struct brcmf_fw_request *req)) |
751 | { |
752 | struct brcmf_fw_item *first = &req->items[0]; |
753 | struct brcmf_fw *fwctx; |
754 | char *alt_path = NULL; |
755 | int ret; |
756 | |
757 | brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(dev)); |
758 | if (!fw_cb) |
759 | return -EINVAL; |
760 | |
761 | if (!brcmf_fw_request_is_valid(req)) |
762 | return -EINVAL; |
763 | |
764 | fwctx = kzalloc(sizeof(*fwctx), GFP_KERNEL); |
765 | if (!fwctx) |
766 | return -ENOMEM; |
767 | |
768 | fwctx->dev = dev; |
769 | fwctx->req = req; |
770 | fwctx->done = fw_cb; |
771 | |
772 | /* First try alternative board-specific path if any */ |
773 | if (fwctx->req->board_types[0]) |
774 | alt_path = brcm_alt_fw_path(path: first->path, |
775 | board_type: fwctx->req->board_types[0]); |
776 | if (alt_path) { |
777 | fwctx->board_index++; |
778 | ret = request_firmware_nowait(THIS_MODULE, uevent: true, name: alt_path, |
779 | device: fwctx->dev, GFP_KERNEL, context: fwctx, |
780 | cont: brcmf_fw_request_done_alt_path); |
781 | kfree(objp: alt_path); |
782 | } else { |
783 | ret = request_firmware_nowait(THIS_MODULE, uevent: true, name: first->path, |
784 | device: fwctx->dev, GFP_KERNEL, context: fwctx, |
785 | cont: brcmf_fw_request_done); |
786 | } |
787 | if (ret < 0) |
788 | brcmf_fw_request_done(NULL, ctx: fwctx); |
789 | |
790 | return 0; |
791 | } |
792 | |
793 | struct brcmf_fw_request * |
794 | brcmf_fw_alloc_request(u32 chip, u32 chiprev, |
795 | const struct brcmf_firmware_mapping mapping_table[], |
796 | u32 table_size, struct brcmf_fw_name *fwnames, |
797 | u32 n_fwnames) |
798 | { |
799 | struct brcmf_fw_request *fwreq; |
800 | char chipname[12]; |
801 | const char *mp_path; |
802 | size_t mp_path_len; |
803 | u32 i, j; |
804 | char end = '\0'; |
805 | |
806 | if (chiprev >= BITS_PER_TYPE(u32)) { |
807 | brcmf_err("Invalid chip revision %u\n", chiprev); |
808 | return NULL; |
809 | } |
810 | |
811 | for (i = 0; i < table_size; i++) { |
812 | if (mapping_table[i].chipid == chip && |
813 | mapping_table[i].revmask & BIT(chiprev)) |
814 | break; |
815 | } |
816 | |
817 | brcmf_chip_name(chipid: chip, chiprev, buf: chipname, len: sizeof(chipname)); |
818 | |
819 | if (i == table_size) { |
820 | brcmf_err("Unknown chip %s\n", chipname); |
821 | return NULL; |
822 | } |
823 | |
824 | fwreq = kzalloc(struct_size(fwreq, items, n_fwnames), GFP_KERNEL); |
825 | if (!fwreq) |
826 | return NULL; |
827 | |
828 | brcmf_info("using %s for chip %s\n", |
829 | mapping_table[i].fw_base, chipname); |
830 | |
831 | mp_path = brcmf_mp_global.firmware_path; |
832 | mp_path_len = strnlen(p: mp_path, BRCMF_FW_ALTPATH_LEN); |
833 | if (mp_path_len) |
834 | end = mp_path[mp_path_len - 1]; |
835 | |
836 | fwreq->n_items = n_fwnames; |
837 | |
838 | for (j = 0; j < n_fwnames; j++) { |
839 | fwreq->items[j].path = fwnames[j].path; |
840 | fwnames[j].path[0] = '\0'; |
841 | /* check if firmware path is provided by module parameter */ |
842 | if (brcmf_mp_global.firmware_path[0] != '\0') { |
843 | strscpy(fwnames[j].path, mp_path, |
844 | BRCMF_FW_NAME_LEN); |
845 | |
846 | if (end != '/') { |
847 | strlcat(p: fwnames[j].path, q: "/", |
848 | BRCMF_FW_NAME_LEN); |
849 | } |
850 | } |
851 | strlcat(p: fwnames[j].path, q: mapping_table[i].fw_base, |
852 | BRCMF_FW_NAME_LEN); |
853 | strlcat(p: fwnames[j].path, q: fwnames[j].extension, |
854 | BRCMF_FW_NAME_LEN); |
855 | fwreq->items[j].path = fwnames[j].path; |
856 | } |
857 | |
858 | return fwreq; |
859 | } |
860 |
Definitions
- nvram_parser_state
- nvram_parser
- is_nvram_char
- is_whitespace
- brcmf_nvram_handle_idle
- brcmf_nvram_handle_key
- brcmf_nvram_handle_value
- brcmf_nvram_handle_comment
- brcmf_nvram_handle_end
- nv_parser_states
- brcmf_init_nvram_parser
- brcmf_fw_strip_multi_v1
- brcmf_fw_strip_multi_v2
- brcmf_fw_add_defaults
- brcmf_fw_add_macaddr
- brcmf_fw_nvram_strip
- brcmf_fw_nvram_free
- brcmf_fw
- brcmf_fw_fix_efi_nvram_ccode
- brcmf_fw_nvram_from_efi
- brcmf_fw_free_request
- brcmf_fw_request_nvram_done
- brcmf_fw_complete_request
- brcm_alt_fw_path
- brcmf_fw_request_firmware
- brcmf_fw_request_done
- brcmf_fw_request_done_alt_path
- brcmf_fw_request_is_valid
- brcmf_fw_get_firmwares
Improve your Profiling and Debugging skills
Find out more