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Commit | Line | Data |
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201417d7 SG |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* | |
3 | * Copyright 2021 Google LLC | |
4 | * Written by Simon Glass <sjg@chromium.org> | |
5 | */ | |
6 | ||
7 | #define LOG_CATEGORY UCLASS_BOOTSTD | |
8 | ||
d678a59d | 9 | #include <common.h> |
201417d7 SG |
10 | #include <dm.h> |
11 | #include <bootdev.h> | |
12 | #include <bootflow.h> | |
a8f5be17 | 13 | #include <bootmeth.h> |
201417d7 | 14 | #include <bootstd.h> |
201417d7 SG |
15 | #include <fs.h> |
16 | #include <log.h> | |
17 | #include <malloc.h> | |
18 | #include <part.h> | |
19 | #include <sort.h> | |
20 | #include <dm/device-internal.h> | |
21 | #include <dm/lists.h> | |
22 | #include <dm/uclass-internal.h> | |
23 | ||
24 | enum { | |
25 | /* | |
26 | * Set some sort of limit on the number of partitions a bootdev can | |
27 | * have. Note that for disks this limits the partitions numbers that | |
28 | * are scanned to 1..MAX_BOOTFLOWS_PER_BOOTDEV | |
29 | */ | |
30 | MAX_PART_PER_BOOTDEV = 30, | |
31 | ||
32 | /* Maximum supported length of the "boot_targets" env string */ | |
33 | BOOT_TARGETS_MAX_LEN = 100, | |
34 | }; | |
35 | ||
36 | int bootdev_add_bootflow(struct bootflow *bflow) | |
37 | { | |
201417d7 SG |
38 | struct bootstd_priv *std; |
39 | struct bootflow *new; | |
40 | int ret; | |
41 | ||
201417d7 SG |
42 | ret = bootstd_get_priv(&std); |
43 | if (ret) | |
44 | return ret; | |
45 | ||
46 | new = malloc(sizeof(*bflow)); | |
47 | if (!new) | |
48 | return log_msg_ret("bflow", -ENOMEM); | |
49 | memcpy(new, bflow, sizeof(*bflow)); | |
50 | ||
51 | list_add_tail(&new->glob_node, &std->glob_head); | |
eccb25cd SG |
52 | if (bflow->dev) { |
53 | struct bootdev_uc_plat *ucp = dev_get_uclass_plat(bflow->dev); | |
54 | ||
55 | list_add_tail(&new->bm_node, &ucp->bootflow_head); | |
56 | } | |
201417d7 SG |
57 | |
58 | return 0; | |
59 | } | |
60 | ||
61 | int bootdev_first_bootflow(struct udevice *dev, struct bootflow **bflowp) | |
62 | { | |
63 | struct bootdev_uc_plat *ucp = dev_get_uclass_plat(dev); | |
64 | ||
65 | if (list_empty(&ucp->bootflow_head)) | |
66 | return -ENOENT; | |
67 | ||
68 | *bflowp = list_first_entry(&ucp->bootflow_head, struct bootflow, | |
69 | bm_node); | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
74 | int bootdev_next_bootflow(struct bootflow **bflowp) | |
75 | { | |
76 | struct bootflow *bflow = *bflowp; | |
77 | struct bootdev_uc_plat *ucp = dev_get_uclass_plat(bflow->dev); | |
78 | ||
79 | *bflowp = NULL; | |
80 | ||
81 | if (list_is_last(&bflow->bm_node, &ucp->bootflow_head)) | |
82 | return -ENOENT; | |
83 | ||
84 | *bflowp = list_entry(bflow->bm_node.next, struct bootflow, bm_node); | |
85 | ||
86 | return 0; | |
87 | } | |
88 | ||
89 | int bootdev_bind(struct udevice *parent, const char *drv_name, const char *name, | |
90 | struct udevice **devp) | |
91 | { | |
92 | struct udevice *dev; | |
93 | char dev_name[30]; | |
94 | char *str; | |
95 | int ret; | |
96 | ||
97 | snprintf(dev_name, sizeof(dev_name), "%s.%s", parent->name, name); | |
98 | str = strdup(dev_name); | |
99 | if (!str) | |
100 | return -ENOMEM; | |
101 | ret = device_bind_driver(parent, drv_name, str, &dev); | |
102 | if (ret) | |
103 | return ret; | |
104 | device_set_name_alloced(dev); | |
105 | *devp = dev; | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | int bootdev_find_in_blk(struct udevice *dev, struct udevice *blk, | |
111 | struct bootflow_iter *iter, struct bootflow *bflow) | |
112 | { | |
831405f4 SG |
113 | struct bootmeth_uc_plat *plat = dev_get_uclass_plat(bflow->method); |
114 | bool allow_any_part = plat->flags & BOOTMETHF_ANY_PART; | |
201417d7 SG |
115 | struct blk_desc *desc = dev_get_uclass_plat(blk); |
116 | struct disk_partition info; | |
117 | char partstr[20]; | |
118 | char name[60]; | |
119 | int ret; | |
120 | ||
121 | /* Sanity check */ | |
122 | if (iter->part >= MAX_PART_PER_BOOTDEV) | |
123 | return log_msg_ret("max", -ESHUTDOWN); | |
124 | ||
125 | bflow->blk = blk; | |
126 | if (iter->part) | |
127 | snprintf(partstr, sizeof(partstr), "part_%x", iter->part); | |
128 | else | |
129 | strcpy(partstr, "whole"); | |
130 | snprintf(name, sizeof(name), "%s.%s", dev->name, partstr); | |
131 | bflow->name = strdup(name); | |
132 | if (!bflow->name) | |
133 | return log_msg_ret("name", -ENOMEM); | |
134 | ||
135 | bflow->part = iter->part; | |
136 | ||
a8f5be17 SG |
137 | ret = bootmeth_check(bflow->method, iter); |
138 | if (ret) | |
139 | return log_msg_ret("check", ret); | |
140 | ||
201417d7 SG |
141 | /* |
142 | * partition numbers start at 0 so this cannot succeed, but it can tell | |
143 | * us whether there is valid media there | |
144 | */ | |
145 | ret = part_get_info(desc, iter->part, &info); | |
831405f4 | 146 | log_debug("part_get_info() returned %d\n", ret); |
201417d7 SG |
147 | if (!iter->part && ret == -ENOENT) |
148 | ret = 0; | |
149 | ||
150 | /* | |
151 | * This error indicates the media is not present. Otherwise we just | |
152 | * blindly scan the next partition. We could be more intelligent here | |
153 | * and check which partition numbers actually exist. | |
154 | */ | |
155 | if (ret == -EOPNOTSUPP) | |
156 | ret = -ESHUTDOWN; | |
157 | else | |
158 | bflow->state = BOOTFLOWST_MEDIA; | |
831405f4 | 159 | if (ret && !allow_any_part) { |
76afc845 SG |
160 | /* allow partition 1 to be missing */ |
161 | if (iter->part == 1) { | |
162 | iter->max_part = 3; | |
163 | ret = -ENOENT; | |
164 | } | |
165 | ||
201417d7 | 166 | return log_msg_ret("part", ret); |
76afc845 | 167 | } |
201417d7 SG |
168 | |
169 | /* | |
170 | * Currently we don't get the number of partitions, so just | |
171 | * assume a large number | |
172 | */ | |
173 | iter->max_part = MAX_PART_PER_BOOTDEV; | |
174 | ||
11324714 NC |
175 | if (iter->flags & BOOTFLOWIF_SINGLE_PARTITION) { |
176 | /* a particular partition was specified, scan it without checking */ | |
177 | } else if (!iter->part) { | |
178 | /* This is the whole disk, check if we have bootable partitions */ | |
f0e358f0 SG |
179 | iter->first_bootable = part_get_bootable(desc); |
180 | log_debug("checking bootable=%d\n", iter->first_bootable); | |
831405f4 SG |
181 | } else if (allow_any_part) { |
182 | /* | |
183 | * allow any partition to be scanned, by skipping any checks | |
184 | * for filesystems or partition contents on this disk | |
185 | */ | |
f0e358f0 SG |
186 | |
187 | /* if there are bootable partitions, scan only those */ | |
831405f4 SG |
188 | } else if (iter->first_bootable >= 0 && |
189 | (iter->first_bootable ? !info.bootable : iter->part != 1)) { | |
f0e358f0 SG |
190 | return log_msg_ret("boot", -EINVAL); |
191 | } else { | |
201417d7 SG |
192 | ret = fs_set_blk_dev_with_part(desc, bflow->part); |
193 | bflow->state = BOOTFLOWST_PART; | |
1aabe4ef SG |
194 | if (ret) |
195 | return log_msg_ret("fs", ret); | |
201417d7 | 196 | |
201417d7 | 197 | log_debug("%s: Found partition %x type %x fstype %d\n", |
b2b7e6c1 SG |
198 | blk->name, bflow->part, |
199 | IS_ENABLED(CONFIG_DOS_PARTITION) ? | |
200 | disk_partition_sys_ind(&info) : 0, | |
201417d7 | 201 | ret ? -1 : fs_get_type()); |
1aabe4ef | 202 | bflow->blk = blk; |
201417d7 SG |
203 | bflow->state = BOOTFLOWST_FS; |
204 | } | |
205 | ||
831405f4 | 206 | log_debug("method %s\n", bflow->method->name); |
a8f5be17 SG |
207 | ret = bootmeth_read_bootflow(bflow->method, bflow); |
208 | if (ret) | |
209 | return log_msg_ret("method", ret); | |
210 | ||
201417d7 SG |
211 | return 0; |
212 | } | |
213 | ||
214 | void bootdev_list(bool probe) | |
215 | { | |
216 | struct udevice *dev; | |
217 | int ret; | |
218 | int i; | |
219 | ||
220 | printf("Seq Probed Status Uclass Name\n"); | |
221 | printf("--- ------ ------ -------- ------------------\n"); | |
222 | if (probe) | |
28a22cd9 | 223 | ret = uclass_first_device_check(UCLASS_BOOTDEV, &dev); |
201417d7 SG |
224 | else |
225 | ret = uclass_find_first_device(UCLASS_BOOTDEV, &dev); | |
226 | for (i = 0; dev; i++) { | |
227 | printf("%3x [ %c ] %6s %-9.9s %s\n", dev_seq(dev), | |
228 | device_active(dev) ? '+' : ' ', | |
ca9d9263 | 229 | ret ? simple_itoa(-ret) : "OK", |
201417d7 SG |
230 | dev_get_uclass_name(dev_get_parent(dev)), dev->name); |
231 | if (probe) | |
28a22cd9 | 232 | ret = uclass_next_device_check(&dev); |
201417d7 SG |
233 | else |
234 | ret = uclass_find_next_device(&dev); | |
235 | } | |
236 | printf("--- ------ ------ -------- ------------------\n"); | |
237 | printf("(%d bootdev%s)\n", i, i != 1 ? "s" : ""); | |
238 | } | |
239 | ||
240 | int bootdev_setup_for_dev(struct udevice *parent, const char *drv_name) | |
241 | { | |
242 | struct udevice *bdev; | |
243 | int ret; | |
244 | ||
245 | ret = device_find_first_child_by_uclass(parent, UCLASS_BOOTDEV, | |
246 | &bdev); | |
247 | if (ret) { | |
248 | if (ret != -ENODEV) { | |
249 | log_debug("Cannot access bootdev device\n"); | |
250 | return ret; | |
251 | } | |
252 | ||
253 | ret = bootdev_bind(parent, drv_name, "bootdev", &bdev); | |
254 | if (ret) { | |
255 | log_debug("Cannot create bootdev device\n"); | |
256 | return ret; | |
257 | } | |
258 | } | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
3a2cb96e SG |
263 | static int bootdev_get_suffix_start(struct udevice *dev, const char *suffix) |
264 | { | |
265 | int len, slen; | |
266 | ||
267 | len = strlen(dev->name); | |
268 | slen = strlen(suffix); | |
269 | if (len > slen && !strcmp(suffix, dev->name + len - slen)) | |
270 | return len - slen; | |
271 | ||
272 | return len; | |
273 | } | |
274 | ||
d7d78576 | 275 | int bootdev_setup_for_sibling_blk(struct udevice *blk, const char *drv_name) |
201417d7 SG |
276 | { |
277 | struct udevice *parent, *dev; | |
278 | char dev_name[50]; | |
3a2cb96e | 279 | int ret, len; |
201417d7 | 280 | |
3a2cb96e SG |
281 | len = bootdev_get_suffix_start(blk, ".blk"); |
282 | snprintf(dev_name, sizeof(dev_name), "%.*s.%s", len, blk->name, | |
283 | "bootdev"); | |
201417d7 SG |
284 | |
285 | parent = dev_get_parent(blk); | |
286 | ret = device_find_child_by_name(parent, dev_name, &dev); | |
287 | if (ret) { | |
288 | char *str; | |
289 | ||
290 | if (ret != -ENODEV) { | |
291 | log_debug("Cannot access bootdev device\n"); | |
292 | return ret; | |
293 | } | |
294 | str = strdup(dev_name); | |
295 | if (!str) | |
296 | return -ENOMEM; | |
297 | ||
298 | ret = device_bind_driver(parent, drv_name, str, &dev); | |
299 | if (ret) { | |
300 | log_debug("Cannot create bootdev device\n"); | |
301 | return ret; | |
302 | } | |
303 | device_set_name_alloced(dev); | |
304 | } | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | int bootdev_get_sibling_blk(struct udevice *dev, struct udevice **blkp) | |
310 | { | |
311 | struct udevice *parent = dev_get_parent(dev); | |
312 | struct udevice *blk; | |
313 | int ret, len; | |
201417d7 SG |
314 | |
315 | if (device_get_uclass_id(dev) != UCLASS_BOOTDEV) | |
316 | return -EINVAL; | |
317 | ||
d7d78576 SG |
318 | /* |
319 | * This should always work if bootdev_setup_for_sibling_blk() was used | |
320 | */ | |
3a2cb96e | 321 | len = bootdev_get_suffix_start(dev, ".bootdev"); |
201417d7 | 322 | ret = device_find_child_by_namelen(parent, dev->name, len, &blk); |
3a2cb96e SG |
323 | if (ret) { |
324 | char dev_name[50]; | |
325 | ||
326 | snprintf(dev_name, sizeof(dev_name), "%.*s.blk", len, | |
327 | dev->name); | |
328 | ret = device_find_child_by_name(parent, dev_name, &blk); | |
329 | if (ret) | |
330 | return log_msg_ret("find", ret); | |
331 | } | |
965020c3 SG |
332 | ret = device_probe(blk); |
333 | if (ret) | |
334 | return log_msg_ret("act", ret); | |
201417d7 SG |
335 | *blkp = blk; |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
340 | static int bootdev_get_from_blk(struct udevice *blk, struct udevice **bootdevp) | |
341 | { | |
342 | struct udevice *parent = dev_get_parent(blk); | |
343 | struct udevice *bootdev; | |
344 | char dev_name[50]; | |
3a2cb96e | 345 | int ret, len; |
201417d7 SG |
346 | |
347 | if (device_get_uclass_id(blk) != UCLASS_BLK) | |
348 | return -EINVAL; | |
349 | ||
d7d78576 | 350 | /* This should always work if bootdev_setup_for_sibling_blk() was used */ |
3a2cb96e SG |
351 | len = bootdev_get_suffix_start(blk, ".blk"); |
352 | snprintf(dev_name, sizeof(dev_name), "%.*s.%s", len, blk->name, | |
353 | "bootdev"); | |
201417d7 SG |
354 | ret = device_find_child_by_name(parent, dev_name, &bootdev); |
355 | if (ret) | |
356 | return log_msg_ret("find", ret); | |
357 | *bootdevp = bootdev; | |
358 | ||
359 | return 0; | |
360 | } | |
361 | ||
362 | int bootdev_unbind_dev(struct udevice *parent) | |
363 | { | |
364 | struct udevice *dev; | |
365 | int ret; | |
366 | ||
367 | ret = device_find_first_child_by_uclass(parent, UCLASS_BOOTDEV, &dev); | |
368 | if (!ret) { | |
369 | ret = device_remove(dev, DM_REMOVE_NORMAL); | |
370 | if (ret) | |
371 | return log_msg_ret("rem", ret); | |
372 | ret = device_unbind(dev); | |
373 | if (ret) | |
374 | return log_msg_ret("unb", ret); | |
375 | } | |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
74ebfb60 SG |
380 | /** |
381 | * label_to_uclass() - Convert a label to a uclass and sequence number | |
382 | * | |
383 | * @label: Label to look up (e.g. "mmc1" or "mmc0") | |
384 | * @seqp: Returns the sequence number, or -1 if none | |
d9f48579 SG |
385 | * @method_flagsp: If non-NULL, returns any flags implied by the label |
386 | * (enum bootflow_meth_flags_t), 0 if none | |
1736b4af SG |
387 | * Returns: sequence number on success, -EPFNOSUPPORT is the uclass is not |
388 | * known, other -ve error code on other error | |
74ebfb60 | 389 | */ |
d9f48579 | 390 | static int label_to_uclass(const char *label, int *seqp, int *method_flagsp) |
74ebfb60 | 391 | { |
d9f48579 | 392 | int seq, len, method_flags; |
74ebfb60 SG |
393 | enum uclass_id id; |
394 | const char *end; | |
74ebfb60 | 395 | |
d9f48579 | 396 | method_flags = 0; |
74ebfb60 SG |
397 | seq = trailing_strtoln_end(label, NULL, &end); |
398 | len = end - label; | |
399 | if (!len) | |
400 | return -EINVAL; | |
401 | id = uclass_get_by_namelen(label, len); | |
402 | log_debug("find %s: seq=%d, id=%d/%s\n", label, seq, id, | |
403 | uclass_get_name(id)); | |
404 | if (id == UCLASS_INVALID) { | |
0c1f4a9f SG |
405 | /* try some special cases */ |
406 | if (IS_ENABLED(CONFIG_BOOTDEV_SPI_FLASH) && | |
407 | !strncmp("spi", label, len)) { | |
408 | id = UCLASS_SPI_FLASH; | |
d9f48579 SG |
409 | } else if (IS_ENABLED(CONFIG_BOOTDEV_ETH) && |
410 | !strncmp("pxe", label, len)) { | |
411 | id = UCLASS_ETH; | |
412 | method_flags |= BOOTFLOW_METHF_PXE_ONLY; | |
413 | } else if (IS_ENABLED(CONFIG_BOOTDEV_ETH) && | |
414 | !strncmp("dhcp", label, len)) { | |
415 | id = UCLASS_ETH; | |
416 | method_flags |= BOOTFLOW_METHF_DHCP_ONLY; | |
0c1f4a9f | 417 | } else { |
1736b4af | 418 | return -EPFNOSUPPORT; |
0c1f4a9f | 419 | } |
74ebfb60 SG |
420 | } |
421 | if (id == UCLASS_USB) | |
422 | id = UCLASS_MASS_STORAGE; | |
423 | *seqp = seq; | |
d9f48579 SG |
424 | if (method_flagsp) |
425 | *method_flagsp = method_flags; | |
74ebfb60 SG |
426 | |
427 | return id; | |
428 | } | |
429 | ||
d9f48579 SG |
430 | int bootdev_find_by_label(const char *label, struct udevice **devp, |
431 | int *method_flagsp) | |
201417d7 | 432 | { |
d9f48579 | 433 | int seq, ret, method_flags = 0; |
201417d7 SG |
434 | struct udevice *media; |
435 | struct uclass *uc; | |
436 | enum uclass_id id; | |
201417d7 | 437 | |
d9f48579 | 438 | ret = label_to_uclass(label, &seq, &method_flags); |
74ebfb60 SG |
439 | if (ret < 0) |
440 | return log_msg_ret("uc", ret); | |
441 | id = ret; | |
201417d7 SG |
442 | |
443 | /* Iterate through devices in the media uclass (e.g. UCLASS_MMC) */ | |
444 | uclass_id_foreach_dev(id, media, uc) { | |
445 | struct udevice *bdev, *blk; | |
446 | int ret; | |
447 | ||
448 | /* if there is no seq, match anything */ | |
449 | if (seq != -1 && dev_seq(media) != seq) { | |
450 | log_debug("- skip, media seq=%d\n", dev_seq(media)); | |
451 | continue; | |
452 | } | |
453 | ||
454 | ret = device_find_first_child_by_uclass(media, UCLASS_BOOTDEV, | |
455 | &bdev); | |
456 | if (ret) { | |
457 | log_debug("- looking via blk, seq=%d, id=%d\n", seq, | |
458 | id); | |
459 | ret = blk_find_device(id, seq, &blk); | |
460 | if (!ret) { | |
461 | log_debug("- get from blk %s\n", blk->name); | |
462 | ret = bootdev_get_from_blk(blk, &bdev); | |
463 | } | |
464 | } | |
465 | if (!ret) { | |
466 | log_debug("- found %s\n", bdev->name); | |
467 | *devp = bdev; | |
66e3dce7 SG |
468 | |
469 | /* | |
470 | * if no sequence number was provided, we must scan all | |
471 | * bootdevs for this media uclass | |
472 | */ | |
e824d0d0 | 473 | if (seq == -1) |
66e3dce7 | 474 | method_flags |= BOOTFLOW_METHF_SINGLE_UCLASS; |
d9f48579 SG |
475 | if (method_flagsp) |
476 | *method_flagsp = method_flags; | |
e824d0d0 | 477 | log_debug("method flags %x\n", method_flags); |
201417d7 SG |
478 | return 0; |
479 | } | |
480 | log_debug("- no device in %s\n", media->name); | |
481 | } | |
201417d7 SG |
482 | |
483 | return -ENOENT; | |
484 | } | |
485 | ||
d9f48579 SG |
486 | int bootdev_find_by_any(const char *name, struct udevice **devp, |
487 | int *method_flagsp) | |
201417d7 SG |
488 | { |
489 | struct udevice *dev; | |
d9f48579 | 490 | int method_flags = 0; |
66e3dce7 | 491 | int ret = -ENODEV, seq; |
201417d7 SG |
492 | char *endp; |
493 | ||
494 | seq = simple_strtol(name, &endp, 16); | |
495 | ||
496 | /* Select by name, label or number */ | |
497 | if (*endp) { | |
498 | ret = uclass_get_device_by_name(UCLASS_BOOTDEV, name, &dev); | |
499 | if (ret == -ENODEV) { | |
d9f48579 | 500 | ret = bootdev_find_by_label(name, &dev, &method_flags); |
201417d7 SG |
501 | if (ret) { |
502 | printf("Cannot find bootdev '%s' (err=%d)\n", | |
503 | name, ret); | |
d9f48579 | 504 | return log_msg_ret("lab", ret); |
201417d7 SG |
505 | } |
506 | ret = device_probe(dev); | |
507 | } | |
508 | if (ret) { | |
509 | printf("Cannot probe bootdev '%s' (err=%d)\n", name, | |
510 | ret); | |
d9f48579 | 511 | return log_msg_ret("pro", ret); |
201417d7 | 512 | } |
66e3dce7 | 513 | } else if (IS_ENABLED(CONFIG_BOOTSTD_FULL)) { |
201417d7 | 514 | ret = uclass_get_device_by_seq(UCLASS_BOOTDEV, seq, &dev); |
66e3dce7 | 515 | method_flags |= BOOTFLOW_METHF_SINGLE_DEV; |
201417d7 SG |
516 | } |
517 | if (ret) { | |
518 | printf("Cannot find '%s' (err=%d)\n", name, ret); | |
519 | return ret; | |
520 | } | |
521 | ||
522 | *devp = dev; | |
d9f48579 SG |
523 | if (method_flagsp) |
524 | *method_flagsp = method_flags; | |
201417d7 SG |
525 | |
526 | return 0; | |
527 | } | |
528 | ||
66e3dce7 SG |
529 | int bootdev_hunt_and_find_by_label(const char *label, struct udevice **devp, |
530 | int *method_flagsp) | |
531 | { | |
532 | int ret; | |
533 | ||
534 | ret = bootdev_hunt(label, false); | |
535 | if (ret) | |
536 | return log_msg_ret("scn", ret); | |
537 | ret = bootdev_find_by_label(label, devp, method_flagsp); | |
538 | if (ret) | |
539 | return log_msg_ret("fnd", ret); | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
b85fc8db SG |
544 | static int default_get_bootflow(struct udevice *dev, struct bootflow_iter *iter, |
545 | struct bootflow *bflow) | |
546 | { | |
547 | struct udevice *blk; | |
548 | int ret; | |
549 | ||
550 | ret = bootdev_get_sibling_blk(dev, &blk); | |
3500ae13 SG |
551 | log_debug("sibling_blk ret=%d, blk=%s\n", ret, |
552 | ret ? "(none)" : blk->name); | |
b85fc8db SG |
553 | /* |
554 | * If there is no media, indicate that no more partitions should be | |
555 | * checked | |
556 | */ | |
557 | if (ret == -EOPNOTSUPP) | |
558 | ret = -ESHUTDOWN; | |
559 | if (ret) | |
560 | return log_msg_ret("blk", ret); | |
561 | assert(blk); | |
562 | ret = bootdev_find_in_blk(dev, blk, iter, bflow); | |
563 | if (ret) | |
564 | return log_msg_ret("find", ret); | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
201417d7 SG |
569 | int bootdev_get_bootflow(struct udevice *dev, struct bootflow_iter *iter, |
570 | struct bootflow *bflow) | |
571 | { | |
572 | const struct bootdev_ops *ops = bootdev_get_ops(dev); | |
573 | ||
831405f4 SG |
574 | log_debug("->get_bootflow %s,%x=%p\n", dev->name, iter->part, |
575 | ops->get_bootflow); | |
b190deb8 | 576 | bootflow_init(bflow, dev, iter->method); |
b85fc8db SG |
577 | if (!ops->get_bootflow) |
578 | return default_get_bootflow(dev, iter, bflow); | |
201417d7 SG |
579 | |
580 | return ops->get_bootflow(dev, iter, bflow); | |
581 | } | |
582 | ||
583 | void bootdev_clear_bootflows(struct udevice *dev) | |
584 | { | |
585 | struct bootdev_uc_plat *ucp = dev_get_uclass_plat(dev); | |
586 | ||
587 | while (!list_empty(&ucp->bootflow_head)) { | |
588 | struct bootflow *bflow; | |
589 | ||
590 | bflow = list_first_entry(&ucp->bootflow_head, struct bootflow, | |
591 | bm_node); | |
a8f5be17 | 592 | bootflow_remove(bflow); |
201417d7 SG |
593 | } |
594 | } | |
595 | ||
e4b69489 SG |
596 | int bootdev_next_label(struct bootflow_iter *iter, struct udevice **devp, |
597 | int *method_flagsp) | |
598 | { | |
599 | struct udevice *dev; | |
600 | ||
601 | log_debug("next\n"); | |
602 | for (dev = NULL; !dev && iter->labels[++iter->cur_label];) { | |
1736b4af SG |
603 | const char *label = iter->labels[iter->cur_label]; |
604 | int ret; | |
605 | ||
606 | log_debug("Scanning: %s\n", label); | |
607 | ret = bootdev_hunt_and_find_by_label(label, &dev, | |
608 | method_flagsp); | |
609 | if (iter->flags & BOOTFLOWIF_SHOW) { | |
610 | if (ret == -EPFNOSUPPORT) { | |
611 | log_warning("Unknown uclass '%s' in label\n", | |
612 | label); | |
613 | } else if (ret == -ENOENT) { | |
614 | /* | |
615 | * looking for, e.g. 'scsi0' should find | |
616 | * something if SCSI is present | |
617 | */ | |
618 | if (!trailing_strtol(label)) { | |
619 | log_warning("No bootdevs for '%s'\n", | |
620 | label); | |
621 | } | |
622 | } | |
623 | } | |
624 | ||
e4b69489 SG |
625 | } |
626 | ||
627 | if (!dev) | |
628 | return log_msg_ret("fin", -ENODEV); | |
629 | *devp = dev; | |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
43e89a30 SG |
634 | int bootdev_next_prio(struct bootflow_iter *iter, struct udevice **devp) |
635 | { | |
9d92c418 | 636 | struct udevice *dev = *devp, *last_dev = NULL; |
43e89a30 SG |
637 | bool found; |
638 | int ret; | |
639 | ||
640 | /* find the next device with this priority */ | |
641 | *devp = NULL; | |
642 | log_debug("next prio %d: dev=%p/%s\n", iter->cur_prio, dev, | |
643 | dev ? dev->name : "none"); | |
644 | do { | |
645 | /* | |
646 | * Don't probe devices here since they may not be of the | |
647 | * required priority | |
648 | */ | |
649 | if (!dev) | |
650 | uclass_find_first_device(UCLASS_BOOTDEV, &dev); | |
651 | else | |
652 | uclass_find_next_device(&dev); | |
653 | found = false; | |
654 | ||
655 | /* scan for the next device with the correct priority */ | |
656 | while (dev) { | |
657 | struct bootdev_uc_plat *plat; | |
658 | ||
659 | plat = dev_get_uclass_plat(dev); | |
660 | log_debug("- %s: %d, want %d\n", dev->name, plat->prio, | |
661 | iter->cur_prio); | |
662 | if (plat->prio == iter->cur_prio) | |
663 | break; | |
664 | uclass_find_next_device(&dev); | |
665 | } | |
666 | ||
667 | /* none found for this priority, so move to the next */ | |
668 | if (!dev) { | |
669 | log_debug("None found at prio %d, moving to %d\n", | |
670 | iter->cur_prio, iter->cur_prio + 1); | |
671 | if (++iter->cur_prio == BOOTDEVP_COUNT) | |
672 | return log_msg_ret("fin", -ENODEV); | |
673 | ||
4f806f31 | 674 | if (iter->flags & BOOTFLOWIF_HUNT) { |
43e89a30 SG |
675 | /* hunt to find new bootdevs */ |
676 | ret = bootdev_hunt_prio(iter->cur_prio, | |
677 | iter->flags & | |
4f806f31 | 678 | BOOTFLOWIF_SHOW); |
3500ae13 SG |
679 | log_debug("- bootdev_hunt_prio() ret %d\n", |
680 | ret); | |
43e89a30 SG |
681 | if (ret) |
682 | return log_msg_ret("hun", ret); | |
683 | } | |
684 | } else { | |
685 | ret = device_probe(dev); | |
9d92c418 CC |
686 | if (!ret) |
687 | last_dev = dev; | |
43e89a30 | 688 | if (ret) { |
9d92c418 | 689 | log_warning("Device '%s' failed to probe\n", |
43e89a30 | 690 | dev->name); |
9d92c418 CC |
691 | if (last_dev == dev) { |
692 | /* | |
693 | * We have already tried this device | |
694 | * and it failed to probe. Give up. | |
695 | */ | |
696 | return log_msg_ret("probe", ret); | |
697 | } | |
698 | last_dev = dev; | |
43e89a30 SG |
699 | dev = NULL; |
700 | } | |
701 | } | |
702 | } while (!dev); | |
703 | ||
704 | *devp = dev; | |
705 | ||
706 | return 0; | |
707 | } | |
708 | ||
91943ff7 SG |
709 | int bootdev_setup_iter(struct bootflow_iter *iter, const char *label, |
710 | struct udevice **devp, int *method_flagsp) | |
201417d7 | 711 | { |
91943ff7 | 712 | struct udevice *bootstd, *dev = NULL; |
4f806f31 | 713 | bool show = iter->flags & BOOTFLOWIF_SHOW; |
47aedc29 | 714 | int method_flags; |
11324714 | 715 | char buf[32]; |
201417d7 SG |
716 | int ret; |
717 | ||
11324714 NC |
718 | if (label) { |
719 | const char *end = strchr(label, ':'); | |
720 | ||
721 | if (end) { | |
722 | size_t len = (size_t)(end - label); | |
723 | const char *part = end + 1; | |
724 | ||
725 | if (len + 1 > sizeof(buf)) { | |
726 | log_err("label \"%s\" is way too long\n", label); | |
727 | return -EINVAL; | |
728 | } | |
729 | ||
730 | memcpy(buf, label, len); | |
731 | buf[len] = '\0'; | |
732 | label = buf; | |
733 | ||
734 | unsigned long tmp; | |
735 | ||
736 | if (strict_strtoul(part, 0, &tmp)) { | |
737 | log_err("Invalid partition number: %s\n", part); | |
738 | return -EINVAL; | |
739 | } | |
740 | ||
741 | iter->flags |= BOOTFLOWIF_SINGLE_PARTITION; | |
742 | iter->part = tmp; | |
743 | } | |
744 | } | |
745 | ||
201417d7 SG |
746 | ret = uclass_first_device_err(UCLASS_BOOTSTD, &bootstd); |
747 | if (ret) { | |
748 | log_err("Missing bootstd device\n"); | |
749 | return log_msg_ret("std", ret); | |
750 | } | |
751 | ||
eacc2611 | 752 | /* hunt for any pre-scan devices */ |
4f806f31 | 753 | if (iter->flags & BOOTFLOWIF_HUNT) { |
eacc2611 | 754 | ret = bootdev_hunt_prio(BOOTDEVP_1_PRE_SCAN, show); |
3500ae13 | 755 | log_debug("- bootdev_hunt_prio() ret %d\n", ret); |
eacc2611 SG |
756 | if (ret) |
757 | return log_msg_ret("pre", ret); | |
758 | } | |
759 | ||
201417d7 | 760 | /* Handle scanning a single device */ |
91943ff7 | 761 | if (IS_ENABLED(CONFIG_BOOTSTD_FULL) && label) { |
4f806f31 | 762 | if (iter->flags & BOOTFLOWIF_HUNT) { |
91943ff7 SG |
763 | ret = bootdev_hunt(label, show); |
764 | if (ret) | |
765 | return log_msg_ret("hun", ret); | |
766 | } | |
767 | ret = bootdev_find_by_any(label, &dev, &method_flags); | |
768 | if (ret) | |
769 | return log_msg_ret("lab", ret); | |
770 | ||
771 | log_debug("method_flags: %x\n", method_flags); | |
772 | if (method_flags & BOOTFLOW_METHF_SINGLE_UCLASS) | |
4f806f31 | 773 | iter->flags |= BOOTFLOWIF_SINGLE_UCLASS; |
91943ff7 | 774 | else if (method_flags & BOOTFLOW_METHF_SINGLE_DEV) |
4f806f31 | 775 | iter->flags |= BOOTFLOWIF_SINGLE_DEV; |
91943ff7 | 776 | else |
4f806f31 | 777 | iter->flags |= BOOTFLOWIF_SINGLE_MEDIA; |
91943ff7 | 778 | log_debug("Selected label: %s, flags %x\n", label, iter->flags); |
47aedc29 SG |
779 | } else { |
780 | bool ok; | |
781 | ||
782 | /* This either returns a non-empty list or NULL */ | |
783 | iter->labels = bootstd_get_bootdev_order(bootstd, &ok); | |
784 | if (!ok) | |
785 | return log_msg_ret("ord", -ENOMEM); | |
786 | log_debug("setup labels %p\n", iter->labels); | |
787 | if (iter->labels) { | |
788 | iter->cur_label = -1; | |
789 | ret = bootdev_next_label(iter, &dev, &method_flags); | |
790 | } else { | |
791 | ret = bootdev_next_prio(iter, &dev); | |
792 | method_flags = 0; | |
793 | } | |
794 | if (!dev) | |
795 | return log_msg_ret("fin", -ENOENT); | |
796 | log_debug("Selected bootdev: %s\n", dev->name); | |
201417d7 SG |
797 | } |
798 | ||
201417d7 SG |
799 | ret = device_probe(dev); |
800 | if (ret) | |
801 | return log_msg_ret("probe", ret); | |
47aedc29 SG |
802 | if (method_flagsp) |
803 | *method_flagsp = method_flags; | |
201417d7 SG |
804 | *devp = dev; |
805 | ||
806 | return 0; | |
807 | } | |
808 | ||
c7b63d50 SG |
809 | static int bootdev_hunt_drv(struct bootdev_hunter *info, uint seq, bool show) |
810 | { | |
811 | const char *name = uclass_get_name(info->uclass); | |
812 | struct bootstd_priv *std; | |
813 | int ret; | |
814 | ||
815 | ret = bootstd_get_priv(&std); | |
816 | if (ret) | |
817 | return log_msg_ret("std", ret); | |
818 | ||
819 | if (!(std->hunters_used & BIT(seq))) { | |
820 | if (show) | |
821 | printf("Hunting with: %s\n", | |
822 | uclass_get_name(info->uclass)); | |
823 | log_debug("Hunting with: %s\n", name); | |
824 | if (info->hunt) { | |
825 | ret = info->hunt(info, show); | |
3500ae13 | 826 | log_debug(" - hunt result %d\n", ret); |
ee2ce292 | 827 | if (ret && ret != -ENOENT) |
c7b63d50 SG |
828 | return ret; |
829 | } | |
830 | std->hunters_used |= BIT(seq); | |
831 | } | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
836 | int bootdev_hunt(const char *spec, bool show) | |
837 | { | |
838 | struct bootdev_hunter *start; | |
839 | const char *end; | |
840 | int n_ent, i; | |
841 | int result; | |
842 | size_t len; | |
843 | ||
844 | start = ll_entry_start(struct bootdev_hunter, bootdev_hunter); | |
845 | n_ent = ll_entry_count(struct bootdev_hunter, bootdev_hunter); | |
846 | result = 0; | |
847 | ||
848 | len = SIZE_MAX; | |
849 | if (spec) { | |
850 | trailing_strtoln_end(spec, NULL, &end); | |
851 | len = end - spec; | |
852 | } | |
853 | ||
854 | for (i = 0; i < n_ent; i++) { | |
855 | struct bootdev_hunter *info = start + i; | |
856 | const char *name = uclass_get_name(info->uclass); | |
857 | int ret; | |
858 | ||
859 | log_debug("looking at %.*s for %s\n", | |
860 | (int)max(strlen(name), len), spec, name); | |
e4b69489 SG |
861 | if (spec && strncmp(spec, name, max(strlen(name), len))) { |
862 | if (info->uclass != UCLASS_ETH || | |
863 | (strcmp("dhcp", spec) && strcmp("pxe", spec))) | |
864 | continue; | |
865 | } | |
c7b63d50 SG |
866 | ret = bootdev_hunt_drv(info, i, show); |
867 | if (ret) | |
868 | result = ret; | |
869 | } | |
870 | ||
871 | return result; | |
872 | } | |
873 | ||
1b1d36ec SG |
874 | int bootdev_unhunt(enum uclass_id id) |
875 | { | |
876 | struct bootdev_hunter *start; | |
877 | int n_ent, i; | |
878 | ||
879 | start = ll_entry_start(struct bootdev_hunter, bootdev_hunter); | |
880 | n_ent = ll_entry_count(struct bootdev_hunter, bootdev_hunter); | |
881 | for (i = 0; i < n_ent; i++) { | |
882 | struct bootdev_hunter *info = start + i; | |
883 | ||
884 | if (info->uclass == id) { | |
885 | struct bootstd_priv *std; | |
886 | int ret; | |
887 | ||
888 | ret = bootstd_get_priv(&std); | |
889 | if (ret) | |
890 | return log_msg_ret("std", ret); | |
891 | if (!(std->hunters_used & BIT(i))) | |
892 | return -EALREADY; | |
893 | std->hunters_used &= ~BIT(i); | |
894 | return 0; | |
895 | } | |
896 | } | |
897 | ||
898 | return -ENOENT; | |
899 | } | |
900 | ||
79a7d4a6 SG |
901 | int bootdev_hunt_prio(enum bootdev_prio_t prio, bool show) |
902 | { | |
903 | struct bootdev_hunter *start; | |
904 | int n_ent, i; | |
905 | int result; | |
906 | ||
907 | start = ll_entry_start(struct bootdev_hunter, bootdev_hunter); | |
908 | n_ent = ll_entry_count(struct bootdev_hunter, bootdev_hunter); | |
909 | result = 0; | |
910 | ||
911 | log_debug("Hunting for priority %d\n", prio); | |
912 | for (i = 0; i < n_ent; i++) { | |
913 | struct bootdev_hunter *info = start + i; | |
914 | int ret; | |
915 | ||
916 | if (prio != info->prio) | |
917 | continue; | |
918 | ret = bootdev_hunt_drv(info, i, show); | |
3500ae13 | 919 | log_debug("bootdev_hunt_drv() return %d\n", ret); |
79a7d4a6 SG |
920 | if (ret && ret != -ENOENT) |
921 | result = ret; | |
922 | } | |
3500ae13 | 923 | log_debug("exit %d\n", result); |
79a7d4a6 SG |
924 | |
925 | return result; | |
926 | } | |
927 | ||
bd90b092 SG |
928 | void bootdev_list_hunters(struct bootstd_priv *std) |
929 | { | |
930 | struct bootdev_hunter *orig, *start; | |
931 | int n_ent, i; | |
932 | ||
933 | orig = ll_entry_start(struct bootdev_hunter, bootdev_hunter); | |
934 | n_ent = ll_entry_count(struct bootdev_hunter, bootdev_hunter); | |
935 | ||
936 | /* | |
937 | * workaround for strange bug in clang-12 which sees all the below data | |
938 | * as zeroes. Any access of start seems to fix it, such as | |
939 | * | |
940 | * printf("%p", start); | |
941 | * | |
942 | * Use memcpy() to force the correct behaviour. | |
943 | */ | |
944 | memcpy(&start, &orig, sizeof(orig)); | |
945 | printf("%4s %4s %-15s %s\n", "Prio", "Used", "Uclass", "Hunter"); | |
946 | printf("%4s %4s %-15s %s\n", "----", "----", "---------------", "---------------"); | |
947 | for (i = 0; i < n_ent; i++) { | |
948 | struct bootdev_hunter *info = start + i; | |
949 | ||
950 | printf("%4d %4s %-15s %s\n", info->prio, | |
951 | std->hunters_used & BIT(i) ? "*" : "", | |
952 | uclass_get_name(info->uclass), | |
953 | info->drv ? info->drv->name : "(none)"); | |
954 | } | |
955 | ||
956 | printf("(total hunters: %d)\n", n_ent); | |
957 | } | |
958 | ||
201417d7 SG |
959 | static int bootdev_post_bind(struct udevice *dev) |
960 | { | |
961 | struct bootdev_uc_plat *ucp = dev_get_uclass_plat(dev); | |
962 | ||
963 | INIT_LIST_HEAD(&ucp->bootflow_head); | |
964 | ||
965 | return 0; | |
966 | } | |
967 | ||
968 | static int bootdev_pre_unbind(struct udevice *dev) | |
969 | { | |
970 | bootdev_clear_bootflows(dev); | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
975 | UCLASS_DRIVER(bootdev) = { | |
976 | .id = UCLASS_BOOTDEV, | |
977 | .name = "bootdev", | |
978 | .flags = DM_UC_FLAG_SEQ_ALIAS, | |
979 | .per_device_plat_auto = sizeof(struct bootdev_uc_plat), | |
980 | .post_bind = bootdev_post_bind, | |
981 | .pre_unbind = bootdev_pre_unbind, | |
982 | }; |