1 // SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
3 * Copyright 2018 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
8 #define LOG_CATEGORY LOGC_BLOBLIST
12 #include <display_options.h>
17 #include <asm/global_data.h>
18 #include <u-boot/crc.h>
21 * A bloblist is a single contiguous chunk of memory with a header
22 * (struct bloblist_hdr) and a number of blobs in it.
24 * Each blob starts on a BLOBLIST_ALIGN boundary relative to the start of the
25 * bloblist and consists of a struct bloblist_rec, some padding to the required
26 * alignment for the blog and then the actual data. The padding ensures that the
27 * start address of the data in each blob is aligned as required. Note that
28 * each blob's *data* is aligned to BLOBLIST_ALIGN regardless of the alignment
29 * of the bloblist itself or the blob header.
31 * So far, only BLOBLIST_ALIGN alignment is supported.
34 DECLARE_GLOBAL_DATA_PTR;
36 static struct tag_name {
37 enum bloblist_tag_t tag;
40 { BLOBLISTT_NONE, "(none)" },
42 /* BLOBLISTT_AREA_FIRMWARE_TOP */
44 /* BLOBLISTT_AREA_FIRMWARE */
45 { BLOBLISTT_ACPI_GNVS, "ACPI GNVS" },
46 { BLOBLISTT_INTEL_VBT, "Intel Video-BIOS table" },
47 { BLOBLISTT_TPM2_TCG_LOG, "TPM v2 log space" },
48 { BLOBLISTT_TCPA_LOG, "TPM log space" },
49 { BLOBLISTT_ACPI_TABLES, "ACPI tables for x86" },
50 { BLOBLISTT_SMBIOS_TABLES, "SMBIOS tables for x86" },
51 { BLOBLISTT_VBOOT_CTX, "Chrome OS vboot context" },
53 /* BLOBLISTT_PROJECT_AREA */
54 { BLOBLISTT_U_BOOT_SPL_HANDOFF, "SPL hand-off" },
56 /* BLOBLISTT_VENDOR_AREA */
59 const char *bloblist_tag_name(enum bloblist_tag_t tag)
63 for (i = 0; i < ARRAY_SIZE(tag_name); i++) {
64 if (tag_name[i].tag == tag)
65 return tag_name[i].name;
71 static struct bloblist_rec *bloblist_first_blob(struct bloblist_hdr *hdr)
73 if (hdr->alloced <= hdr->hdr_size)
75 return (struct bloblist_rec *)((void *)hdr + hdr->hdr_size);
78 static ulong bloblist_blob_end_ofs(struct bloblist_hdr *hdr,
79 struct bloblist_rec *rec)
83 offset = (void *)rec - (void *)hdr;
84 offset += rec->hdr_size + ALIGN(rec->size, BLOBLIST_ALIGN);
89 static struct bloblist_rec *bloblist_next_blob(struct bloblist_hdr *hdr,
90 struct bloblist_rec *rec)
92 ulong offset = bloblist_blob_end_ofs(hdr, rec);
94 if (offset >= hdr->alloced)
96 return (struct bloblist_rec *)((void *)hdr + offset);
99 #define foreach_rec(_rec, _hdr) \
100 for (_rec = bloblist_first_blob(_hdr); \
102 _rec = bloblist_next_blob(_hdr, _rec))
104 static struct bloblist_rec *bloblist_findrec(uint tag)
106 struct bloblist_hdr *hdr = gd->bloblist;
107 struct bloblist_rec *rec;
112 foreach_rec(rec, hdr) {
120 static int bloblist_addrec(uint tag, int size, int align,
121 struct bloblist_rec **recp)
123 struct bloblist_hdr *hdr = gd->bloblist;
124 struct bloblist_rec *rec;
125 int data_start, new_alloced;
128 align = BLOBLIST_ALIGN;
130 /* Figure out where the new data will start */
131 data_start = map_to_sysmem(hdr) + hdr->alloced + sizeof(*rec);
133 /* Align the address and then calculate the offset from ->alloced */
134 data_start = ALIGN(data_start, align) - map_to_sysmem(hdr);
136 /* Calculate the new allocated total */
137 new_alloced = data_start + ALIGN(size, align);
139 if (new_alloced > hdr->size) {
140 log_err("Failed to allocate %x bytes size=%x, need size=%x\n",
141 size, hdr->size, new_alloced);
142 return log_msg_ret("bloblist add", -ENOSPC);
144 rec = (void *)hdr + hdr->alloced;
147 rec->hdr_size = data_start - hdr->alloced;
151 /* Zero the record data */
152 memset((void *)rec + rec->hdr_size, '\0', rec->size);
154 hdr->alloced = new_alloced;
160 static int bloblist_ensurerec(uint tag, struct bloblist_rec **recp, int size,
163 struct bloblist_rec *rec;
165 rec = bloblist_findrec(tag);
167 if (size && size != rec->size) {
174 ret = bloblist_addrec(tag, size, align, &rec);
183 void *bloblist_find(uint tag, int size)
185 struct bloblist_rec *rec;
187 rec = bloblist_findrec(tag);
190 if (size && size != rec->size)
193 return (void *)rec + rec->hdr_size;
196 void *bloblist_add(uint tag, int size, int align)
198 struct bloblist_rec *rec;
200 if (bloblist_addrec(tag, size, align, &rec))
203 return (void *)rec + rec->hdr_size;
206 int bloblist_ensure_size(uint tag, int size, int align, void **blobp)
208 struct bloblist_rec *rec;
211 ret = bloblist_ensurerec(tag, &rec, size, align);
214 *blobp = (void *)rec + rec->hdr_size;
219 void *bloblist_ensure(uint tag, int size)
221 struct bloblist_rec *rec;
223 if (bloblist_ensurerec(tag, &rec, size, 0))
226 return (void *)rec + rec->hdr_size;
229 int bloblist_ensure_size_ret(uint tag, int *sizep, void **blobp)
231 struct bloblist_rec *rec;
234 ret = bloblist_ensurerec(tag, &rec, *sizep, 0);
239 *blobp = (void *)rec + rec->hdr_size;
244 static int bloblist_resize_rec(struct bloblist_hdr *hdr,
245 struct bloblist_rec *rec,
248 int expand_by; /* Number of bytes to expand by (-ve to contract) */
249 int new_alloced; /* New value for @hdr->alloced */
250 ulong next_ofs; /* Offset of the record after @rec */
252 expand_by = ALIGN(new_size - rec->size, BLOBLIST_ALIGN);
253 new_alloced = ALIGN(hdr->alloced + expand_by, BLOBLIST_ALIGN);
255 log_debug("Attempt to shrink blob size below 0 (%x)\n",
257 return log_msg_ret("size", -EINVAL);
259 if (new_alloced > hdr->size) {
260 log_err("Failed to allocate %x bytes size=%x, need size=%x\n",
261 new_size, hdr->size, new_alloced);
262 return log_msg_ret("alloc", -ENOSPC);
265 /* Move the following blobs up or down, if this is not the last */
266 next_ofs = bloblist_blob_end_ofs(hdr, rec);
267 if (next_ofs != hdr->alloced) {
268 memmove((void *)hdr + next_ofs + expand_by,
269 (void *)hdr + next_ofs, new_alloced - next_ofs);
271 hdr->alloced = new_alloced;
273 /* Zero the new part of the blob */
275 memset((void *)rec + rec->hdr_size + rec->size, '\0',
276 new_size - rec->size);
279 /* Update the size of this blob */
280 rec->size = new_size;
285 int bloblist_resize(uint tag, int new_size)
287 struct bloblist_hdr *hdr = gd->bloblist;
288 struct bloblist_rec *rec;
291 rec = bloblist_findrec(tag);
293 return log_msg_ret("find", -ENOENT);
294 ret = bloblist_resize_rec(hdr, rec, new_size);
296 return log_msg_ret("resize", ret);
301 static u32 bloblist_calc_chksum(struct bloblist_hdr *hdr)
303 struct bloblist_rec *rec;
306 chksum = crc32(0, (unsigned char *)hdr,
307 offsetof(struct bloblist_hdr, chksum));
308 foreach_rec(rec, hdr) {
309 chksum = crc32(chksum, (void *)rec, rec->hdr_size);
310 chksum = crc32(chksum, (void *)rec + rec->hdr_size, rec->size);
316 int bloblist_new(ulong addr, uint size, uint flags)
318 struct bloblist_hdr *hdr;
320 if (size < sizeof(*hdr))
321 return log_ret(-ENOSPC);
322 if (addr & (BLOBLIST_ALIGN - 1))
323 return log_ret(-EFAULT);
324 hdr = map_sysmem(addr, size);
325 memset(hdr, '\0', sizeof(*hdr));
326 hdr->version = BLOBLIST_VERSION;
327 hdr->hdr_size = sizeof(*hdr);
329 hdr->magic = BLOBLIST_MAGIC;
331 hdr->alloced = hdr->hdr_size;
338 int bloblist_check(ulong addr, uint size)
340 struct bloblist_hdr *hdr;
343 hdr = map_sysmem(addr, sizeof(*hdr));
344 if (hdr->magic != BLOBLIST_MAGIC)
345 return log_msg_ret("Bad magic", -ENOENT);
346 if (hdr->version != BLOBLIST_VERSION)
347 return log_msg_ret("Bad version", -EPROTONOSUPPORT);
348 if (size && hdr->size != size)
349 return log_msg_ret("Bad size", -EFBIG);
350 chksum = bloblist_calc_chksum(hdr);
351 if (hdr->chksum != chksum) {
352 log_err("Checksum %x != %x\n", hdr->chksum, chksum);
353 return log_msg_ret("Bad checksum", -EIO);
360 int bloblist_finish(void)
362 struct bloblist_hdr *hdr = gd->bloblist;
364 hdr->chksum = bloblist_calc_chksum(hdr);
365 log_debug("Finished bloblist size %lx at %lx\n", (ulong)hdr->size,
366 (ulong)map_to_sysmem(hdr));
371 ulong bloblist_get_base(void)
373 return map_to_sysmem(gd->bloblist);
376 ulong bloblist_get_size(void)
378 struct bloblist_hdr *hdr = gd->bloblist;
383 void bloblist_get_stats(ulong *basep, ulong *sizep, ulong *allocedp)
385 struct bloblist_hdr *hdr = gd->bloblist;
387 *basep = map_to_sysmem(gd->bloblist);
389 *allocedp = hdr->alloced;
392 static void show_value(const char *prompt, ulong value)
394 printf("%s:%*s %-5lx ", prompt, 8 - (int)strlen(prompt), "", value);
395 print_size(value, "\n");
398 void bloblist_show_stats(void)
400 ulong base, size, alloced;
402 bloblist_get_stats(&base, &size, &alloced);
403 printf("base: %lx\n", base);
404 show_value("size", size);
405 show_value("alloced", alloced);
406 show_value("free", size - alloced);
409 void bloblist_show_list(void)
411 struct bloblist_hdr *hdr = gd->bloblist;
412 struct bloblist_rec *rec;
414 printf("%-8s %8s Tag Name\n", "Address", "Size");
415 for (rec = bloblist_first_blob(hdr); rec;
416 rec = bloblist_next_blob(hdr, rec)) {
417 printf("%08lx %8x %4x %s\n",
418 (ulong)map_to_sysmem((void *)rec + rec->hdr_size),
419 rec->size, rec->tag, bloblist_tag_name(rec->tag));
423 void bloblist_reloc(void *to, uint to_size, void *from, uint from_size)
425 struct bloblist_hdr *hdr;
427 memcpy(to, from, from_size);
432 int bloblist_init(void)
434 bool fixed = IS_ENABLED(CONFIG_BLOBLIST_FIXED);
440 * We don't expect to find an existing bloblist in the first phase of
441 * U-Boot that runs. Also we have no way to receive the address of an
442 * allocated bloblist from a previous stage, so it must be at a fixed
445 expected = fixed && !u_boot_first_phase();
446 if (spl_prev_phase() == PHASE_TPL && !IS_ENABLED(CONFIG_TPL_BLOBLIST))
449 addr = IF_ENABLED_INT(CONFIG_BLOBLIST_FIXED,
450 CONFIG_BLOBLIST_ADDR);
451 size = CONFIG_BLOBLIST_SIZE;
453 ret = bloblist_check(addr, size);
455 log_warning("Expected bloblist at %lx not found (err=%d)\n",
458 /* Get the real size, if it is not what we expected */
459 size = gd->bloblist->size;
463 if (CONFIG_IS_ENABLED(BLOBLIST_ALLOC)) {
464 void *ptr = memalign(BLOBLIST_ALIGN, size);
467 return log_msg_ret("alloc", -ENOMEM);
468 addr = map_to_sysmem(ptr);
470 return log_msg_ret("!fixed", ret);
472 log_debug("Creating new bloblist size %lx at %lx\n", size,
474 ret = bloblist_new(addr, size, 0);
476 log_debug("Found existing bloblist size %lx at %lx\n", size,