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
16 #include <asm/global_data.h>
17 #include <u-boot/crc.h>
20 * A bloblist is a single contiguous chunk of memory with a header
21 * (struct bloblist_hdr) and a number of blobs in it.
23 * Each blob starts on a BLOBLIST_ALIGN boundary relative to the start of the
24 * bloblist and consists of a struct bloblist_rec, some padding to the required
25 * alignment for the blog and then the actual data. The padding ensures that the
26 * start address of the data in each blob is aligned as required. Note that
27 * each blob's *data* is aligned to BLOBLIST_ALIGN regardless of the alignment
28 * of the bloblist itself or the blob header.
30 * So far, only BLOBLIST_ALIGN alignment is supported.
33 DECLARE_GLOBAL_DATA_PTR;
35 static struct tag_name {
36 enum bloblist_tag_t tag;
39 { BLOBLISTT_NONE, "(none)" },
41 /* BLOBLISTT_AREA_FIRMWARE_TOP */
43 /* BLOBLISTT_AREA_FIRMWARE */
44 { BLOBLISTT_ACPI_GNVS, "ACPI GNVS" },
45 { BLOBLISTT_INTEL_VBT, "Intel Video-BIOS table" },
46 { BLOBLISTT_TPM2_TCG_LOG, "TPM v2 log space" },
47 { BLOBLISTT_TCPA_LOG, "TPM log space" },
48 { BLOBLISTT_ACPI_TABLES, "ACPI tables for x86" },
49 { BLOBLISTT_SMBIOS_TABLES, "SMBIOS tables for x86" },
50 { BLOBLISTT_VBOOT_CTX, "Chrome OS vboot context" },
52 /* BLOBLISTT_PROJECT_AREA */
53 { BLOBLISTT_U_BOOT_SPL_HANDOFF, "SPL hand-off" },
55 /* BLOBLISTT_VENDOR_AREA */
58 const char *bloblist_tag_name(enum bloblist_tag_t tag)
62 for (i = 0; i < ARRAY_SIZE(tag_name); i++) {
63 if (tag_name[i].tag == tag)
64 return tag_name[i].name;
70 static struct bloblist_rec *bloblist_first_blob(struct bloblist_hdr *hdr)
72 if (hdr->alloced <= hdr->hdr_size)
74 return (struct bloblist_rec *)((void *)hdr + hdr->hdr_size);
77 static ulong bloblist_blob_end_ofs(struct bloblist_hdr *hdr,
78 struct bloblist_rec *rec)
82 offset = (void *)rec - (void *)hdr;
83 offset += rec->hdr_size + ALIGN(rec->size, BLOBLIST_ALIGN);
88 static struct bloblist_rec *bloblist_next_blob(struct bloblist_hdr *hdr,
89 struct bloblist_rec *rec)
91 ulong offset = bloblist_blob_end_ofs(hdr, rec);
93 if (offset >= hdr->alloced)
95 return (struct bloblist_rec *)((void *)hdr + offset);
98 #define foreach_rec(_rec, _hdr) \
99 for (_rec = bloblist_first_blob(_hdr); \
101 _rec = bloblist_next_blob(_hdr, _rec))
103 static struct bloblist_rec *bloblist_findrec(uint tag)
105 struct bloblist_hdr *hdr = gd->bloblist;
106 struct bloblist_rec *rec;
111 foreach_rec(rec, hdr) {
119 static int bloblist_addrec(uint tag, int size, int align,
120 struct bloblist_rec **recp)
122 struct bloblist_hdr *hdr = gd->bloblist;
123 struct bloblist_rec *rec;
124 int data_start, new_alloced;
127 align = BLOBLIST_ALIGN;
129 /* Figure out where the new data will start */
130 data_start = map_to_sysmem(hdr) + hdr->alloced + sizeof(*rec);
132 /* Align the address and then calculate the offset from ->alloced */
133 data_start = ALIGN(data_start, align) - map_to_sysmem(hdr);
135 /* Calculate the new allocated total */
136 new_alloced = data_start + ALIGN(size, align);
138 if (new_alloced > hdr->size) {
139 log_err("Failed to allocate %x bytes size=%x, need size=%x\n",
140 size, hdr->size, new_alloced);
141 return log_msg_ret("bloblist add", -ENOSPC);
143 rec = (void *)hdr + hdr->alloced;
146 rec->hdr_size = data_start - hdr->alloced;
150 /* Zero the record data */
151 memset((void *)rec + rec->hdr_size, '\0', rec->size);
153 hdr->alloced = new_alloced;
159 static int bloblist_ensurerec(uint tag, struct bloblist_rec **recp, int size,
162 struct bloblist_rec *rec;
164 rec = bloblist_findrec(tag);
166 if (size && size != rec->size) {
173 ret = bloblist_addrec(tag, size, align, &rec);
182 void *bloblist_find(uint tag, int size)
184 struct bloblist_rec *rec;
186 rec = bloblist_findrec(tag);
189 if (size && size != rec->size)
192 return (void *)rec + rec->hdr_size;
195 void *bloblist_add(uint tag, int size, int align)
197 struct bloblist_rec *rec;
199 if (bloblist_addrec(tag, size, align, &rec))
202 return (void *)rec + rec->hdr_size;
205 int bloblist_ensure_size(uint tag, int size, int align, void **blobp)
207 struct bloblist_rec *rec;
210 ret = bloblist_ensurerec(tag, &rec, size, align);
213 *blobp = (void *)rec + rec->hdr_size;
218 void *bloblist_ensure(uint tag, int size)
220 struct bloblist_rec *rec;
222 if (bloblist_ensurerec(tag, &rec, size, 0))
225 return (void *)rec + rec->hdr_size;
228 int bloblist_ensure_size_ret(uint tag, int *sizep, void **blobp)
230 struct bloblist_rec *rec;
233 ret = bloblist_ensurerec(tag, &rec, *sizep, 0);
238 *blobp = (void *)rec + rec->hdr_size;
243 static int bloblist_resize_rec(struct bloblist_hdr *hdr,
244 struct bloblist_rec *rec,
247 int expand_by; /* Number of bytes to expand by (-ve to contract) */
248 int new_alloced; /* New value for @hdr->alloced */
249 ulong next_ofs; /* Offset of the record after @rec */
251 expand_by = ALIGN(new_size - rec->size, BLOBLIST_ALIGN);
252 new_alloced = ALIGN(hdr->alloced + expand_by, BLOBLIST_ALIGN);
254 log_debug("Attempt to shrink blob size below 0 (%x)\n",
256 return log_msg_ret("size", -EINVAL);
258 if (new_alloced > hdr->size) {
259 log_err("Failed to allocate %x bytes size=%x, need size=%x\n",
260 new_size, hdr->size, new_alloced);
261 return log_msg_ret("alloc", -ENOSPC);
264 /* Move the following blobs up or down, if this is not the last */
265 next_ofs = bloblist_blob_end_ofs(hdr, rec);
266 if (next_ofs != hdr->alloced) {
267 memmove((void *)hdr + next_ofs + expand_by,
268 (void *)hdr + next_ofs, new_alloced - next_ofs);
270 hdr->alloced = new_alloced;
272 /* Zero the new part of the blob */
274 memset((void *)rec + rec->hdr_size + rec->size, '\0',
275 new_size - rec->size);
278 /* Update the size of this blob */
279 rec->size = new_size;
284 int bloblist_resize(uint tag, int new_size)
286 struct bloblist_hdr *hdr = gd->bloblist;
287 struct bloblist_rec *rec;
290 rec = bloblist_findrec(tag);
292 return log_msg_ret("find", -ENOENT);
293 ret = bloblist_resize_rec(hdr, rec, new_size);
295 return log_msg_ret("resize", ret);
300 static u32 bloblist_calc_chksum(struct bloblist_hdr *hdr)
302 struct bloblist_rec *rec;
305 chksum = crc32(0, (unsigned char *)hdr,
306 offsetof(struct bloblist_hdr, chksum));
307 foreach_rec(rec, hdr) {
308 chksum = crc32(chksum, (void *)rec, rec->hdr_size);
309 chksum = crc32(chksum, (void *)rec + rec->hdr_size, rec->size);
315 int bloblist_new(ulong addr, uint size, uint flags)
317 struct bloblist_hdr *hdr;
319 if (size < sizeof(*hdr))
320 return log_ret(-ENOSPC);
321 if (addr & (BLOBLIST_ALIGN - 1))
322 return log_ret(-EFAULT);
323 hdr = map_sysmem(addr, size);
324 memset(hdr, '\0', sizeof(*hdr));
325 hdr->version = BLOBLIST_VERSION;
326 hdr->hdr_size = sizeof(*hdr);
328 hdr->magic = BLOBLIST_MAGIC;
330 hdr->alloced = hdr->hdr_size;
337 int bloblist_check(ulong addr, uint size)
339 struct bloblist_hdr *hdr;
342 hdr = map_sysmem(addr, sizeof(*hdr));
343 if (hdr->magic != BLOBLIST_MAGIC)
344 return log_msg_ret("Bad magic", -ENOENT);
345 if (hdr->version != BLOBLIST_VERSION)
346 return log_msg_ret("Bad version", -EPROTONOSUPPORT);
347 if (size && hdr->size != size)
348 return log_msg_ret("Bad size", -EFBIG);
349 chksum = bloblist_calc_chksum(hdr);
350 if (hdr->chksum != chksum) {
351 log_err("Checksum %x != %x\n", hdr->chksum, chksum);
352 return log_msg_ret("Bad checksum", -EIO);
359 int bloblist_finish(void)
361 struct bloblist_hdr *hdr = gd->bloblist;
363 hdr->chksum = bloblist_calc_chksum(hdr);
364 log_debug("Finished bloblist size %lx at %lx\n", (ulong)hdr->size,
365 (ulong)map_to_sysmem(hdr));
370 ulong bloblist_get_base(void)
372 return map_to_sysmem(gd->bloblist);
375 ulong bloblist_get_size(void)
377 struct bloblist_hdr *hdr = gd->bloblist;
382 void bloblist_get_stats(ulong *basep, ulong *sizep, ulong *allocedp)
384 struct bloblist_hdr *hdr = gd->bloblist;
386 *basep = map_to_sysmem(gd->bloblist);
388 *allocedp = hdr->alloced;
391 static void show_value(const char *prompt, ulong value)
393 printf("%s:%*s %-5lx ", prompt, 8 - (int)strlen(prompt), "", value);
394 print_size(value, "\n");
397 void bloblist_show_stats(void)
399 ulong base, size, alloced;
401 bloblist_get_stats(&base, &size, &alloced);
402 printf("base: %lx\n", base);
403 show_value("size", size);
404 show_value("alloced", alloced);
405 show_value("free", size - alloced);
408 void bloblist_show_list(void)
410 struct bloblist_hdr *hdr = gd->bloblist;
411 struct bloblist_rec *rec;
413 printf("%-8s %8s Tag Name\n", "Address", "Size");
414 for (rec = bloblist_first_blob(hdr); rec;
415 rec = bloblist_next_blob(hdr, rec)) {
416 printf("%08lx %8x %4x %s\n",
417 (ulong)map_to_sysmem((void *)rec + rec->hdr_size),
418 rec->size, rec->tag, bloblist_tag_name(rec->tag));
422 void bloblist_reloc(void *to, uint to_size, void *from, uint from_size)
424 struct bloblist_hdr *hdr;
426 memcpy(to, from, from_size);
431 int bloblist_init(void)
433 bool fixed = IS_ENABLED(CONFIG_BLOBLIST_FIXED);
439 * We don't expect to find an existing bloblist in the first phase of
440 * U-Boot that runs. Also we have no way to receive the address of an
441 * allocated bloblist from a previous stage, so it must be at a fixed
444 expected = fixed && !u_boot_first_phase();
445 if (spl_prev_phase() == PHASE_TPL && !IS_ENABLED(CONFIG_TPL_BLOBLIST))
448 addr = IF_ENABLED_INT(CONFIG_BLOBLIST_FIXED,
449 CONFIG_BLOBLIST_ADDR);
450 size = CONFIG_BLOBLIST_SIZE;
452 ret = bloblist_check(addr, size);
454 log_warning("Expected bloblist at %lx not found (err=%d)\n",
457 /* Get the real size, if it is not what we expected */
458 size = gd->bloblist->size;
462 if (CONFIG_IS_ENABLED(BLOBLIST_ALLOC)) {
463 void *ptr = memalign(BLOBLIST_ALIGN, size);
466 return log_msg_ret("alloc", -ENOMEM);
467 addr = map_to_sysmem(ptr);
469 return log_msg_ret("!fixed", ret);
471 log_debug("Creating new bloblist size %lx at %lx\n", size,
473 ret = bloblist_new(addr, size, 0);
475 log_debug("Found existing bloblist size %lx at %lx\n", size,