1 // SPDX-License-Identifier: ISC
2 /*
3 * Copyright (c) 2014-2017 Qualcomm Atheros, Inc.
4 * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
5 */
6
7 /* Algorithmic part of the firmware download.
8 * To be included in the container file providing framework
9 */
10
11 #define wil_err_fw(wil, fmt, arg...) wil_err(wil, "ERR[ FW ]" fmt, ##arg)
12 #define wil_dbg_fw(wil, fmt, arg...) wil_dbg(wil, "DBG[ FW ]" fmt, ##arg)
13 #define wil_hex_dump_fw(prefix_str, prefix_type, rowsize, \
14 groupsize, buf, len, ascii) \
15 print_hex_dump_debug("DBG[ FW ]" prefix_str, \
16 prefix_type, rowsize, \
17 groupsize, buf, len, ascii)
18
wil_fw_addr_check(struct wil6210_priv * wil,void __iomem ** ioaddr,__le32 val,u32 size,const char * msg)19 static bool wil_fw_addr_check(struct wil6210_priv *wil,
20 void __iomem **ioaddr, __le32 val,
21 u32 size, const char *msg)
22 {
23 *ioaddr = wmi_buffer_block(wil, val, size);
24 if (!(*ioaddr)) {
25 wil_err_fw(wil, "bad %s: 0x%08x\n", msg, le32_to_cpu(val));
26 return false;
27 }
28 return true;
29 }
30
31 /**
32 * wil_fw_verify - verify firmware file validity
33 *
34 * perform various checks for the firmware file header.
35 * records are not validated.
36 *
37 * Return file size or negative error
38 */
wil_fw_verify(struct wil6210_priv * wil,const u8 * data,size_t size)39 static int wil_fw_verify(struct wil6210_priv *wil, const u8 *data, size_t size)
40 {
41 const struct wil_fw_record_head *hdr = (const void *)data;
42 struct wil_fw_record_file_header fh;
43 const struct wil_fw_record_file_header *fh_;
44 u32 crc;
45 u32 dlen;
46
47 if (size % 4) {
48 wil_err_fw(wil, "image size not aligned: %zu\n", size);
49 return -EINVAL;
50 }
51 /* have enough data for the file header? */
52 if (size < sizeof(*hdr) + sizeof(fh)) {
53 wil_err_fw(wil, "file too short: %zu bytes\n", size);
54 return -EINVAL;
55 }
56
57 /* start with the file header? */
58 if (le16_to_cpu(hdr->type) != wil_fw_type_file_header) {
59 wil_err_fw(wil, "no file header\n");
60 return -EINVAL;
61 }
62
63 /* data_len */
64 fh_ = (struct wil_fw_record_file_header *)&hdr[1];
65 dlen = le32_to_cpu(fh_->data_len);
66 if (dlen % 4) {
67 wil_err_fw(wil, "data length not aligned: %lu\n", (ulong)dlen);
68 return -EINVAL;
69 }
70 if (size < dlen) {
71 wil_err_fw(wil, "file truncated at %zu/%lu\n",
72 size, (ulong)dlen);
73 return -EINVAL;
74 }
75 if (dlen < sizeof(*hdr) + sizeof(fh)) {
76 wil_err_fw(wil, "data length too short: %lu\n", (ulong)dlen);
77 return -EINVAL;
78 }
79
80 /* signature */
81 if (le32_to_cpu(fh_->signature) != WIL_FW_SIGNATURE) {
82 wil_err_fw(wil, "bad header signature: 0x%08x\n",
83 le32_to_cpu(fh_->signature));
84 return -EINVAL;
85 }
86
87 /* version */
88 if (le32_to_cpu(fh_->version) > WIL_FW_FMT_VERSION) {
89 wil_err_fw(wil, "unsupported header version: %d\n",
90 le32_to_cpu(fh_->version));
91 return -EINVAL;
92 }
93
94 /* checksum. ~crc32(~0, data, size) when fh.crc set to 0*/
95 fh = *fh_;
96 fh.crc = 0;
97
98 crc = crc32_le(~0, (unsigned char const *)hdr, sizeof(*hdr));
99 crc = crc32_le(crc, (unsigned char const *)&fh, sizeof(fh));
100 crc = crc32_le(crc, (unsigned char const *)&fh_[1],
101 dlen - sizeof(*hdr) - sizeof(fh));
102 crc = ~crc;
103
104 if (crc != le32_to_cpu(fh_->crc)) {
105 wil_err_fw(wil, "checksum mismatch:"
106 " calculated for %lu bytes 0x%08x != 0x%08x\n",
107 (ulong)dlen, crc, le32_to_cpu(fh_->crc));
108 return -EINVAL;
109 }
110
111 return (int)dlen;
112 }
113
fw_ignore_section(struct wil6210_priv * wil,const void * data,size_t size)114 static int fw_ignore_section(struct wil6210_priv *wil, const void *data,
115 size_t size)
116 {
117 return 0;
118 }
119
120 static int
fw_handle_capabilities(struct wil6210_priv * wil,const void * data,size_t size)121 fw_handle_capabilities(struct wil6210_priv *wil, const void *data,
122 size_t size)
123 {
124 const struct wil_fw_record_capabilities *rec = data;
125 size_t capa_size;
126
127 if (size < sizeof(*rec)) {
128 wil_err_fw(wil, "capabilities record too short: %zu\n", size);
129 /* let the FW load anyway */
130 return 0;
131 }
132
133 capa_size = size - offsetof(struct wil_fw_record_capabilities,
134 capabilities);
135 bitmap_zero(wil->fw_capabilities, WMI_FW_CAPABILITY_MAX);
136 memcpy(wil->fw_capabilities, rec->capabilities,
137 min_t(size_t, sizeof(wil->fw_capabilities), capa_size));
138 wil_hex_dump_fw("CAPA", DUMP_PREFIX_OFFSET, 16, 1,
139 rec->capabilities, capa_size, false);
140 return 0;
141 }
142
143 static int
fw_handle_brd_file(struct wil6210_priv * wil,const void * data,size_t size)144 fw_handle_brd_file(struct wil6210_priv *wil, const void *data,
145 size_t size)
146 {
147 const struct wil_fw_record_brd_file *rec = data;
148 u32 max_num_ent, i, ent_size;
149
150 if (size <= offsetof(struct wil_fw_record_brd_file, brd_info)) {
151 wil_err(wil, "board record too short, size %zu\n", size);
152 return -EINVAL;
153 }
154
155 ent_size = size - offsetof(struct wil_fw_record_brd_file, brd_info);
156 max_num_ent = ent_size / sizeof(struct brd_info);
157
158 if (!max_num_ent) {
159 wil_err(wil, "brd info entries are missing\n");
160 return -EINVAL;
161 }
162
163 wil->brd_info = kcalloc(max_num_ent, sizeof(struct wil_brd_info),
164 GFP_KERNEL);
165 if (!wil->brd_info)
166 return -ENOMEM;
167
168 for (i = 0; i < max_num_ent; i++) {
169 wil->brd_info[i].file_addr =
170 le32_to_cpu(rec->brd_info[i].base_addr);
171 wil->brd_info[i].file_max_size =
172 le32_to_cpu(rec->brd_info[i].max_size_bytes);
173
174 if (!wil->brd_info[i].file_addr)
175 break;
176
177 wil_dbg_fw(wil,
178 "brd info %d: file_addr 0x%x, file_max_size %d\n",
179 i, wil->brd_info[i].file_addr,
180 wil->brd_info[i].file_max_size);
181 }
182
183 wil->num_of_brd_entries = i;
184 if (wil->num_of_brd_entries == 0) {
185 kfree(wil->brd_info);
186 wil->brd_info = NULL;
187 wil_dbg_fw(wil,
188 "no valid brd info entries, using brd file addr\n");
189
190 } else {
191 wil_dbg_fw(wil, "num of brd info entries %d\n",
192 wil->num_of_brd_entries);
193 }
194
195 return 0;
196 }
197
198 static int
fw_handle_concurrency(struct wil6210_priv * wil,const void * data,size_t size)199 fw_handle_concurrency(struct wil6210_priv *wil, const void *data,
200 size_t size)
201 {
202 const struct wil_fw_record_concurrency *rec = data;
203 const struct wil_fw_concurrency_combo *combo;
204 const struct wil_fw_concurrency_limit *limit;
205 size_t remain, lsize;
206 int i, n_combos;
207
208 if (size < sizeof(*rec)) {
209 wil_err_fw(wil, "concurrency record too short: %zu\n", size);
210 /* continue, let the FW load anyway */
211 return 0;
212 }
213
214 n_combos = le16_to_cpu(rec->n_combos);
215 remain = size - sizeof(struct wil_fw_record_concurrency);
216 combo = (const struct wil_fw_concurrency_combo *)(rec + 1);
217 for (i = 0; i < n_combos; i++) {
218 if (remain < sizeof(*combo))
219 goto out_short;
220 remain -= sizeof(*combo);
221 limit = combo->limits;
222 lsize = combo->n_limits * sizeof(*limit);
223 if (remain < lsize)
224 goto out_short;
225 remain -= lsize;
226 limit += combo->n_limits;
227 combo = (struct wil_fw_concurrency_combo *)limit;
228 }
229
230 return wil_cfg80211_iface_combinations_from_fw(wil, rec);
231 out_short:
232 wil_err_fw(wil, "concurrency record truncated\n");
233 return 0;
234 }
235
236 static int
fw_handle_comment(struct wil6210_priv * wil,const void * data,size_t size)237 fw_handle_comment(struct wil6210_priv *wil, const void *data,
238 size_t size)
239 {
240 const struct wil_fw_record_comment_hdr *hdr = data;
241 u32 magic;
242 int rc = 0;
243
244 if (size < sizeof(*hdr))
245 return 0;
246
247 magic = le32_to_cpu(hdr->magic);
248
249 switch (magic) {
250 case WIL_FW_CAPABILITIES_MAGIC:
251 wil_dbg_fw(wil, "magic is WIL_FW_CAPABILITIES_MAGIC\n");
252 rc = fw_handle_capabilities(wil, data, size);
253 break;
254 case WIL_BRD_FILE_MAGIC:
255 wil_dbg_fw(wil, "magic is WIL_BRD_FILE_MAGIC\n");
256 rc = fw_handle_brd_file(wil, data, size);
257 break;
258 case WIL_FW_CONCURRENCY_MAGIC:
259 wil_dbg_fw(wil, "magic is WIL_FW_CONCURRENCY_MAGIC\n");
260 rc = fw_handle_concurrency(wil, data, size);
261 break;
262 default:
263 wil_hex_dump_fw("", DUMP_PREFIX_OFFSET, 16, 1,
264 data, size, true);
265 }
266
267 return rc;
268 }
269
__fw_handle_data(struct wil6210_priv * wil,const void * data,size_t size,__le32 addr)270 static int __fw_handle_data(struct wil6210_priv *wil, const void *data,
271 size_t size, __le32 addr)
272 {
273 const struct wil_fw_record_data *d = data;
274 void __iomem *dst;
275 size_t s = size - sizeof(*d);
276
277 if (size < sizeof(*d) + sizeof(u32)) {
278 wil_err_fw(wil, "data record too short: %zu\n", size);
279 return -EINVAL;
280 }
281
282 if (!wil_fw_addr_check(wil, &dst, addr, s, "address"))
283 return -EINVAL;
284 wil_dbg_fw(wil, "write [0x%08x] <== %zu bytes\n", le32_to_cpu(addr), s);
285 wil_memcpy_toio_32(dst, d->data, s);
286 wmb(); /* finish before processing next record */
287
288 return 0;
289 }
290
fw_handle_data(struct wil6210_priv * wil,const void * data,size_t size)291 static int fw_handle_data(struct wil6210_priv *wil, const void *data,
292 size_t size)
293 {
294 const struct wil_fw_record_data *d = data;
295
296 return __fw_handle_data(wil, data, size, d->addr);
297 }
298
fw_handle_fill(struct wil6210_priv * wil,const void * data,size_t size)299 static int fw_handle_fill(struct wil6210_priv *wil, const void *data,
300 size_t size)
301 {
302 const struct wil_fw_record_fill *d = data;
303 void __iomem *dst;
304 u32 v;
305 size_t s = (size_t)le32_to_cpu(d->size);
306
307 if (size != sizeof(*d)) {
308 wil_err_fw(wil, "bad size for fill record: %zu\n", size);
309 return -EINVAL;
310 }
311
312 if (s < sizeof(u32)) {
313 wil_err_fw(wil, "fill size too short: %zu\n", s);
314 return -EINVAL;
315 }
316
317 if (s % sizeof(u32)) {
318 wil_err_fw(wil, "fill size not aligned: %zu\n", s);
319 return -EINVAL;
320 }
321
322 if (!wil_fw_addr_check(wil, &dst, d->addr, s, "address"))
323 return -EINVAL;
324
325 v = le32_to_cpu(d->value);
326 wil_dbg_fw(wil, "fill [0x%08x] <== 0x%08x, %zu bytes\n",
327 le32_to_cpu(d->addr), v, s);
328 wil_memset_toio_32(dst, v, s);
329 wmb(); /* finish before processing next record */
330
331 return 0;
332 }
333
fw_handle_file_header(struct wil6210_priv * wil,const void * data,size_t size)334 static int fw_handle_file_header(struct wil6210_priv *wil, const void *data,
335 size_t size)
336 {
337 const struct wil_fw_record_file_header *d = data;
338
339 if (size != sizeof(*d)) {
340 wil_err_fw(wil, "file header length incorrect: %zu\n", size);
341 return -EINVAL;
342 }
343
344 wil_dbg_fw(wil, "new file, ver. %d, %i bytes\n",
345 d->version, d->data_len);
346 wil_hex_dump_fw("", DUMP_PREFIX_OFFSET, 16, 1, d->comment,
347 sizeof(d->comment), true);
348
349 if (!memcmp(d->comment, WIL_FW_VERSION_PREFIX,
350 WIL_FW_VERSION_PREFIX_LEN))
351 memcpy(wil->fw_version,
352 d->comment + WIL_FW_VERSION_PREFIX_LEN,
353 min(sizeof(d->comment) - WIL_FW_VERSION_PREFIX_LEN,
354 sizeof(wil->fw_version) - 1));
355
356 return 0;
357 }
358
fw_handle_direct_write(struct wil6210_priv * wil,const void * data,size_t size)359 static int fw_handle_direct_write(struct wil6210_priv *wil, const void *data,
360 size_t size)
361 {
362 const struct wil_fw_record_direct_write *d = data;
363 const struct wil_fw_data_dwrite *block = d->data;
364 int n, i;
365
366 if (size % sizeof(*block)) {
367 wil_err_fw(wil, "record size not aligned on %zu: %zu\n",
368 sizeof(*block), size);
369 return -EINVAL;
370 }
371 n = size / sizeof(*block);
372
373 for (i = 0; i < n; i++) {
374 void __iomem *dst;
375 u32 m = le32_to_cpu(block[i].mask);
376 u32 v = le32_to_cpu(block[i].value);
377 u32 x, y;
378
379 if (!wil_fw_addr_check(wil, &dst, block[i].addr, 0, "address"))
380 return -EINVAL;
381
382 x = readl(dst);
383 y = (x & m) | (v & ~m);
384 wil_dbg_fw(wil, "write [0x%08x] <== 0x%08x "
385 "(old 0x%08x val 0x%08x mask 0x%08x)\n",
386 le32_to_cpu(block[i].addr), y, x, v, m);
387 writel(y, dst);
388 wmb(); /* finish before processing next record */
389 }
390
391 return 0;
392 }
393
gw_write(struct wil6210_priv * wil,void __iomem * gwa_addr,void __iomem * gwa_cmd,void __iomem * gwa_ctl,u32 gw_cmd,u32 a)394 static int gw_write(struct wil6210_priv *wil, void __iomem *gwa_addr,
395 void __iomem *gwa_cmd, void __iomem *gwa_ctl, u32 gw_cmd,
396 u32 a)
397 {
398 unsigned delay = 0;
399
400 writel(a, gwa_addr);
401 writel(gw_cmd, gwa_cmd);
402 wmb(); /* finish before activate gw */
403
404 writel(WIL_FW_GW_CTL_RUN, gwa_ctl); /* activate gw */
405 do {
406 udelay(1); /* typical time is few usec */
407 if (delay++ > 100) {
408 wil_err_fw(wil, "gw timeout\n");
409 return -EINVAL;
410 }
411 } while (readl(gwa_ctl) & WIL_FW_GW_CTL_BUSY); /* gw done? */
412
413 return 0;
414 }
415
fw_handle_gateway_data(struct wil6210_priv * wil,const void * data,size_t size)416 static int fw_handle_gateway_data(struct wil6210_priv *wil, const void *data,
417 size_t size)
418 {
419 const struct wil_fw_record_gateway_data *d = data;
420 const struct wil_fw_data_gw *block = d->data;
421 void __iomem *gwa_addr;
422 void __iomem *gwa_val;
423 void __iomem *gwa_cmd;
424 void __iomem *gwa_ctl;
425 u32 gw_cmd;
426 int n, i;
427
428 if (size < sizeof(*d) + sizeof(*block)) {
429 wil_err_fw(wil, "gateway record too short: %zu\n", size);
430 return -EINVAL;
431 }
432
433 if ((size - sizeof(*d)) % sizeof(*block)) {
434 wil_err_fw(wil, "gateway record data size"
435 " not aligned on %zu: %zu\n",
436 sizeof(*block), size - sizeof(*d));
437 return -EINVAL;
438 }
439 n = (size - sizeof(*d)) / sizeof(*block);
440
441 gw_cmd = le32_to_cpu(d->command);
442
443 wil_dbg_fw(wil, "gw write record [%3d] blocks, cmd 0x%08x\n",
444 n, gw_cmd);
445
446 if (!wil_fw_addr_check(wil, &gwa_addr, d->gateway_addr_addr, 0,
447 "gateway_addr_addr") ||
448 !wil_fw_addr_check(wil, &gwa_val, d->gateway_value_addr, 0,
449 "gateway_value_addr") ||
450 !wil_fw_addr_check(wil, &gwa_cmd, d->gateway_cmd_addr, 0,
451 "gateway_cmd_addr") ||
452 !wil_fw_addr_check(wil, &gwa_ctl, d->gateway_ctrl_address, 0,
453 "gateway_ctrl_address"))
454 return -EINVAL;
455
456 wil_dbg_fw(wil, "gw addresses: addr 0x%08x val 0x%08x"
457 " cmd 0x%08x ctl 0x%08x\n",
458 le32_to_cpu(d->gateway_addr_addr),
459 le32_to_cpu(d->gateway_value_addr),
460 le32_to_cpu(d->gateway_cmd_addr),
461 le32_to_cpu(d->gateway_ctrl_address));
462
463 for (i = 0; i < n; i++) {
464 int rc;
465 u32 a = le32_to_cpu(block[i].addr);
466 u32 v = le32_to_cpu(block[i].value);
467
468 wil_dbg_fw(wil, " gw write[%3d] [0x%08x] <== 0x%08x\n",
469 i, a, v);
470
471 writel(v, gwa_val);
472 rc = gw_write(wil, gwa_addr, gwa_cmd, gwa_ctl, gw_cmd, a);
473 if (rc)
474 return rc;
475 }
476
477 return 0;
478 }
479
fw_handle_gateway_data4(struct wil6210_priv * wil,const void * data,size_t size)480 static int fw_handle_gateway_data4(struct wil6210_priv *wil, const void *data,
481 size_t size)
482 {
483 const struct wil_fw_record_gateway_data4 *d = data;
484 const struct wil_fw_data_gw4 *block = d->data;
485 void __iomem *gwa_addr;
486 void __iomem *gwa_val[ARRAY_SIZE(block->value)];
487 void __iomem *gwa_cmd;
488 void __iomem *gwa_ctl;
489 u32 gw_cmd;
490 int n, i, k;
491
492 if (size < sizeof(*d) + sizeof(*block)) {
493 wil_err_fw(wil, "gateway4 record too short: %zu\n", size);
494 return -EINVAL;
495 }
496
497 if ((size - sizeof(*d)) % sizeof(*block)) {
498 wil_err_fw(wil, "gateway4 record data size"
499 " not aligned on %zu: %zu\n",
500 sizeof(*block), size - sizeof(*d));
501 return -EINVAL;
502 }
503 n = (size - sizeof(*d)) / sizeof(*block);
504
505 gw_cmd = le32_to_cpu(d->command);
506
507 wil_dbg_fw(wil, "gw4 write record [%3d] blocks, cmd 0x%08x\n",
508 n, gw_cmd);
509
510 if (!wil_fw_addr_check(wil, &gwa_addr, d->gateway_addr_addr, 0,
511 "gateway_addr_addr"))
512 return -EINVAL;
513 for (k = 0; k < ARRAY_SIZE(block->value); k++)
514 if (!wil_fw_addr_check(wil, &gwa_val[k],
515 d->gateway_value_addr[k],
516 0, "gateway_value_addr"))
517 return -EINVAL;
518 if (!wil_fw_addr_check(wil, &gwa_cmd, d->gateway_cmd_addr, 0,
519 "gateway_cmd_addr") ||
520 !wil_fw_addr_check(wil, &gwa_ctl, d->gateway_ctrl_address, 0,
521 "gateway_ctrl_address"))
522 return -EINVAL;
523
524 wil_dbg_fw(wil, "gw4 addresses: addr 0x%08x cmd 0x%08x ctl 0x%08x\n",
525 le32_to_cpu(d->gateway_addr_addr),
526 le32_to_cpu(d->gateway_cmd_addr),
527 le32_to_cpu(d->gateway_ctrl_address));
528 wil_hex_dump_fw("val addresses: ", DUMP_PREFIX_NONE, 16, 4,
529 d->gateway_value_addr, sizeof(d->gateway_value_addr),
530 false);
531
532 for (i = 0; i < n; i++) {
533 int rc;
534 u32 a = le32_to_cpu(block[i].addr);
535 u32 v[ARRAY_SIZE(block->value)];
536
537 for (k = 0; k < ARRAY_SIZE(block->value); k++)
538 v[k] = le32_to_cpu(block[i].value[k]);
539
540 wil_dbg_fw(wil, " gw4 write[%3d] [0x%08x] <==\n", i, a);
541 wil_hex_dump_fw(" val ", DUMP_PREFIX_NONE, 16, 4, v,
542 sizeof(v), false);
543
544 for (k = 0; k < ARRAY_SIZE(block->value); k++)
545 writel(v[k], gwa_val[k]);
546 rc = gw_write(wil, gwa_addr, gwa_cmd, gwa_ctl, gw_cmd, a);
547 if (rc)
548 return rc;
549 }
550
551 return 0;
552 }
553
554 static const struct {
555 int type;
556 int (*load_handler)(struct wil6210_priv *wil, const void *data,
557 size_t size);
558 int (*parse_handler)(struct wil6210_priv *wil, const void *data,
559 size_t size);
560 } wil_fw_handlers[] = {
561 {wil_fw_type_comment, fw_handle_comment, fw_handle_comment},
562 {wil_fw_type_data, fw_handle_data, fw_ignore_section},
563 {wil_fw_type_fill, fw_handle_fill, fw_ignore_section},
564 /* wil_fw_type_action */
565 /* wil_fw_type_verify */
566 {wil_fw_type_file_header, fw_handle_file_header,
567 fw_handle_file_header},
568 {wil_fw_type_direct_write, fw_handle_direct_write, fw_ignore_section},
569 {wil_fw_type_gateway_data, fw_handle_gateway_data, fw_ignore_section},
570 {wil_fw_type_gateway_data4, fw_handle_gateway_data4,
571 fw_ignore_section},
572 };
573
wil_fw_handle_record(struct wil6210_priv * wil,int type,const void * data,size_t size,bool load)574 static int wil_fw_handle_record(struct wil6210_priv *wil, int type,
575 const void *data, size_t size, bool load)
576 {
577 int i;
578
579 for (i = 0; i < ARRAY_SIZE(wil_fw_handlers); i++)
580 if (wil_fw_handlers[i].type == type)
581 return load ?
582 wil_fw_handlers[i].load_handler(
583 wil, data, size) :
584 wil_fw_handlers[i].parse_handler(
585 wil, data, size);
586
587 wil_err_fw(wil, "unknown record type: %d\n", type);
588 return -EINVAL;
589 }
590
591 /**
592 * wil_fw_process - process section from FW file
593 * if load is true: Load the FW and uCode code and data to the
594 * corresponding device memory regions,
595 * otherwise only parse and look for capabilities
596 *
597 * Return error code
598 */
wil_fw_process(struct wil6210_priv * wil,const void * data,size_t size,bool load)599 static int wil_fw_process(struct wil6210_priv *wil, const void *data,
600 size_t size, bool load)
601 {
602 int rc = 0;
603 const struct wil_fw_record_head *hdr;
604 size_t s, hdr_sz;
605
606 for (hdr = data;; hdr = (const void *)hdr + s, size -= s) {
607 if (size < sizeof(*hdr))
608 break;
609 hdr_sz = le32_to_cpu(hdr->size);
610 s = sizeof(*hdr) + hdr_sz;
611 if (s > size)
612 break;
613 if (hdr_sz % 4) {
614 wil_err_fw(wil, "unaligned record size: %zu\n",
615 hdr_sz);
616 return -EINVAL;
617 }
618 rc = wil_fw_handle_record(wil, le16_to_cpu(hdr->type),
619 &hdr[1], hdr_sz, load);
620 if (rc)
621 return rc;
622 }
623 if (size) {
624 wil_err_fw(wil, "unprocessed bytes: %zu\n", size);
625 if (size >= sizeof(*hdr)) {
626 wil_err_fw(wil, "Stop at offset %ld"
627 " record type %d [%zd bytes]\n",
628 (long)((const void *)hdr - data),
629 le16_to_cpu(hdr->type), hdr_sz);
630 }
631 return -EINVAL;
632 }
633
634 return rc;
635 }
636
637 /**
638 * wil_request_firmware - Request firmware
639 *
640 * Request firmware image from the file
641 * If load is true, load firmware to device, otherwise
642 * only parse and extract capabilities
643 *
644 * Return error code
645 */
wil_request_firmware(struct wil6210_priv * wil,const char * name,bool load)646 int wil_request_firmware(struct wil6210_priv *wil, const char *name,
647 bool load)
648 {
649 int rc, rc1;
650 const struct firmware *fw;
651 size_t sz;
652 const void *d;
653
654 rc = request_firmware(&fw, name, wil_to_dev(wil));
655 if (rc) {
656 wil_err_fw(wil, "Failed to load firmware %s rc %d\n", name, rc);
657 return rc;
658 }
659 wil_dbg_fw(wil, "Loading <%s>, %zu bytes\n", name, fw->size);
660
661 /* re-initialize board info params */
662 wil->num_of_brd_entries = 0;
663 kfree(wil->brd_info);
664 wil->brd_info = NULL;
665
666 for (sz = fw->size, d = fw->data; sz; sz -= rc1, d += rc1) {
667 rc1 = wil_fw_verify(wil, d, sz);
668 if (rc1 < 0) {
669 rc = rc1;
670 goto out;
671 }
672 rc = wil_fw_process(wil, d, rc1, load);
673 if (rc < 0)
674 goto out;
675 }
676
677 out:
678 release_firmware(fw);
679 if (rc)
680 wil_err_fw(wil, "Loading <%s> failed, rc %d\n", name, rc);
681 return rc;
682 }
683
684 /**
685 * wil_brd_process - process section from BRD file
686 *
687 * Return error code
688 */
wil_brd_process(struct wil6210_priv * wil,const void * data,size_t size)689 static int wil_brd_process(struct wil6210_priv *wil, const void *data,
690 size_t size)
691 {
692 int rc = 0;
693 const struct wil_fw_record_head *hdr = data;
694 size_t s, hdr_sz = 0;
695 u16 type;
696 int i = 0;
697
698 /* Assuming the board file includes only one file header
699 * and one or several data records.
700 * Each record starts with wil_fw_record_head.
701 */
702 if (size < sizeof(*hdr))
703 return -EINVAL;
704 s = sizeof(*hdr) + le32_to_cpu(hdr->size);
705 if (s > size)
706 return -EINVAL;
707
708 /* Skip the header record and handle the data records */
709 size -= s;
710
711 for (hdr = data + s;; hdr = (const void *)hdr + s, size -= s, i++) {
712 if (size < sizeof(*hdr))
713 break;
714
715 if (i >= wil->num_of_brd_entries) {
716 wil_err_fw(wil,
717 "Too many brd records: %d, num of expected entries %d\n",
718 i, wil->num_of_brd_entries);
719 break;
720 }
721
722 hdr_sz = le32_to_cpu(hdr->size);
723 s = sizeof(*hdr) + hdr_sz;
724 if (wil->brd_info[i].file_max_size &&
725 hdr_sz > wil->brd_info[i].file_max_size)
726 return -EINVAL;
727 if (sizeof(*hdr) + hdr_sz > size)
728 return -EINVAL;
729 if (hdr_sz % 4) {
730 wil_err_fw(wil, "unaligned record size: %zu\n",
731 hdr_sz);
732 return -EINVAL;
733 }
734 type = le16_to_cpu(hdr->type);
735 if (type != wil_fw_type_data) {
736 wil_err_fw(wil,
737 "invalid record type for board file: %d\n",
738 type);
739 return -EINVAL;
740 }
741 if (hdr_sz < sizeof(struct wil_fw_record_data)) {
742 wil_err_fw(wil, "data record too short: %zu\n", hdr_sz);
743 return -EINVAL;
744 }
745
746 wil_dbg_fw(wil,
747 "using info from fw file for record %d: addr[0x%08x], max size %d\n",
748 i, wil->brd_info[i].file_addr,
749 wil->brd_info[i].file_max_size);
750
751 rc = __fw_handle_data(wil, &hdr[1], hdr_sz,
752 cpu_to_le32(wil->brd_info[i].file_addr));
753 if (rc)
754 return rc;
755 }
756
757 if (size) {
758 wil_err_fw(wil, "unprocessed bytes: %zu\n", size);
759 if (size >= sizeof(*hdr)) {
760 wil_err_fw(wil,
761 "Stop at offset %ld record type %d [%zd bytes]\n",
762 (long)((const void *)hdr - data),
763 le16_to_cpu(hdr->type), hdr_sz);
764 }
765 return -EINVAL;
766 }
767
768 return 0;
769 }
770
771 /**
772 * wil_request_board - Request board file
773 *
774 * Request board image from the file
775 * board file address and max size are read from FW file
776 * during initialization.
777 * brd file shall include one header and one data section.
778 *
779 * Return error code
780 */
wil_request_board(struct wil6210_priv * wil,const char * name)781 int wil_request_board(struct wil6210_priv *wil, const char *name)
782 {
783 int rc, dlen;
784 const struct firmware *brd;
785
786 rc = request_firmware(&brd, name, wil_to_dev(wil));
787 if (rc) {
788 wil_err_fw(wil, "Failed to load brd %s\n", name);
789 return rc;
790 }
791 wil_dbg_fw(wil, "Loading <%s>, %zu bytes\n", name, brd->size);
792
793 /* Verify the header */
794 dlen = wil_fw_verify(wil, brd->data, brd->size);
795 if (dlen < 0) {
796 rc = dlen;
797 goto out;
798 }
799
800 /* Process the data records */
801 rc = wil_brd_process(wil, brd->data, dlen);
802
803 out:
804 release_firmware(brd);
805 if (rc)
806 wil_err_fw(wil, "Loading <%s> failed, rc %d\n", name, rc);
807 return rc;
808 }
809
810 /**
811 * wil_fw_verify_file_exists - checks if firmware file exist
812 *
813 * @wil: driver context
814 * @name: firmware file name
815 *
816 * return value - boolean, true for success, false for failure
817 */
wil_fw_verify_file_exists(struct wil6210_priv * wil,const char * name)818 bool wil_fw_verify_file_exists(struct wil6210_priv *wil, const char *name)
819 {
820 const struct firmware *fw;
821 int rc;
822
823 rc = request_firmware(&fw, name, wil_to_dev(wil));
824 if (!rc)
825 release_firmware(fw);
826 else
827 wil_dbg_fw(wil, "<%s> not available: %d\n", name, rc);
828 return !rc;
829 }
830