1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2018 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
13 #include <asm/global_data.h>
14 #include <u-boot/crc.h>
17 * A bloblist is a single contiguous chunk of memory with a header
18 * (struct bloblist_hdr) and a number of blobs in it.
20 * Each blob starts on a BLOBLIST_ALIGN boundary relative to the start of the
21 * bloblist and consists of a struct bloblist_rec, some padding to the required
22 * alignment for the blog and then the actual data. The padding ensures that the
23 * start address of the data in each blob is aligned as required. Note that
24 * each blob's *data* is aligned to BLOBLIST_ALIGN regardless of the alignment
25 * of the bloblist itself or the blob header.
27 * So far, only BLOBLIST_ALIGN alignment is supported.
30 DECLARE_GLOBAL_DATA_PTR;
32 static const char *const tag_name[] = {
33 [BLOBLISTT_NONE] = "(none)",
34 [BLOBLISTT_U_BOOT_SPL_HANDOFF] = "SPL hand-off",
35 [BLOBLISTT_VBOOT_CTX] = "Chrome OS vboot context",
36 [BLOBLISTT_ACPI_GNVS] = "ACPI GNVS",
37 [BLOBLISTT_INTEL_VBT] = "Intel Video-BIOS table",
38 [BLOBLISTT_TPM2_TCG_LOG] = "TPM v2 log space",
39 [BLOBLISTT_TCPA_LOG] = "TPM log space",
40 [BLOBLISTT_ACPI_TABLES] = "ACPI tables for x86",
41 [BLOBLISTT_SMBIOS_TABLES] = "SMBIOS tables for x86",
44 const char *bloblist_tag_name(enum bloblist_tag_t tag)
46 if (tag < 0 || tag >= BLOBLISTT_COUNT)
52 static struct bloblist_rec *bloblist_first_blob(struct bloblist_hdr *hdr)
54 if (hdr->alloced <= hdr->hdr_size)
56 return (struct bloblist_rec *)((void *)hdr + hdr->hdr_size);
59 static ulong bloblist_blob_end_ofs(struct bloblist_hdr *hdr,
60 struct bloblist_rec *rec)
64 offset = (void *)rec - (void *)hdr;
65 offset += rec->hdr_size + ALIGN(rec->size, BLOBLIST_ALIGN);
70 static struct bloblist_rec *bloblist_next_blob(struct bloblist_hdr *hdr,
71 struct bloblist_rec *rec)
73 ulong offset = bloblist_blob_end_ofs(hdr, rec);
75 if (offset >= hdr->alloced)
77 return (struct bloblist_rec *)((void *)hdr + offset);
80 #define foreach_rec(_rec, _hdr) \
81 for (_rec = bloblist_first_blob(_hdr); \
83 _rec = bloblist_next_blob(_hdr, _rec))
85 static struct bloblist_rec *bloblist_findrec(uint tag)
87 struct bloblist_hdr *hdr = gd->bloblist;
88 struct bloblist_rec *rec;
93 foreach_rec(rec, hdr) {
101 static int bloblist_addrec(uint tag, int size, int align,
102 struct bloblist_rec **recp)
104 struct bloblist_hdr *hdr = gd->bloblist;
105 struct bloblist_rec *rec;
106 int data_start, new_alloced;
109 align = BLOBLIST_ALIGN;
111 /* Figure out where the new data will start */
112 data_start = map_to_sysmem(hdr) + hdr->alloced + sizeof(*rec);
114 /* Align the address and then calculate the offset from ->alloced */
115 data_start = ALIGN(data_start, align) - map_to_sysmem(hdr);
117 /* Calculate the new allocated total */
118 new_alloced = data_start + ALIGN(size, align);
120 if (new_alloced > hdr->size) {
121 log(LOGC_BLOBLIST, LOGL_ERR,
122 "Failed to allocate %x bytes size=%x, need size=%x\n",
123 size, hdr->size, new_alloced);
124 return log_msg_ret("bloblist add", -ENOSPC);
126 rec = (void *)hdr + hdr->alloced;
129 rec->hdr_size = data_start - hdr->alloced;
133 /* Zero the record data */
134 memset((void *)rec + rec->hdr_size, '\0', rec->size);
136 hdr->alloced = new_alloced;
142 static int bloblist_ensurerec(uint tag, struct bloblist_rec **recp, int size,
145 struct bloblist_rec *rec;
147 rec = bloblist_findrec(tag);
149 if (size && size != rec->size) {
156 ret = bloblist_addrec(tag, size, align, &rec);
165 void *bloblist_find(uint tag, int size)
167 struct bloblist_rec *rec;
169 rec = bloblist_findrec(tag);
172 if (size && size != rec->size)
175 return (void *)rec + rec->hdr_size;
178 void *bloblist_add(uint tag, int size, int align)
180 struct bloblist_rec *rec;
182 if (bloblist_addrec(tag, size, align, &rec))
185 return (void *)rec + rec->hdr_size;
188 int bloblist_ensure_size(uint tag, int size, int align, void **blobp)
190 struct bloblist_rec *rec;
193 ret = bloblist_ensurerec(tag, &rec, size, align);
196 *blobp = (void *)rec + rec->hdr_size;
201 void *bloblist_ensure(uint tag, int size)
203 struct bloblist_rec *rec;
205 if (bloblist_ensurerec(tag, &rec, size, 0))
208 return (void *)rec + rec->hdr_size;
211 int bloblist_ensure_size_ret(uint tag, int *sizep, void **blobp)
213 struct bloblist_rec *rec;
216 ret = bloblist_ensurerec(tag, &rec, *sizep, 0);
221 *blobp = (void *)rec + rec->hdr_size;
226 static int bloblist_resize_rec(struct bloblist_hdr *hdr,
227 struct bloblist_rec *rec,
230 int expand_by; /* Number of bytes to expand by (-ve to contract) */
231 int new_alloced; /* New value for @hdr->alloced */
232 ulong next_ofs; /* Offset of the record after @rec */
234 expand_by = ALIGN(new_size - rec->size, BLOBLIST_ALIGN);
235 new_alloced = ALIGN(hdr->alloced + expand_by, BLOBLIST_ALIGN);
237 log(LOGC_BLOBLIST, LOGL_DEBUG,
238 "Attempt to shrink blob size below 0 (%x)\n", new_size);
239 return log_msg_ret("size", -EINVAL);
241 if (new_alloced > hdr->size) {
242 log(LOGC_BLOBLIST, LOGL_ERR,
243 "Failed to allocate %x bytes size=%x, need size=%x\n",
244 new_size, hdr->size, new_alloced);
245 return log_msg_ret("alloc", -ENOSPC);
248 /* Move the following blobs up or down, if this is not the last */
249 next_ofs = bloblist_blob_end_ofs(hdr, rec);
250 if (next_ofs != hdr->alloced) {
251 memmove((void *)hdr + next_ofs + expand_by,
252 (void *)hdr + next_ofs, new_alloced - next_ofs);
254 hdr->alloced = new_alloced;
256 /* Zero the new part of the blob */
258 memset((void *)rec + rec->hdr_size + rec->size, '\0',
259 new_size - rec->size);
262 /* Update the size of this blob */
263 rec->size = new_size;
268 int bloblist_resize(uint tag, int new_size)
270 struct bloblist_hdr *hdr = gd->bloblist;
271 struct bloblist_rec *rec;
274 rec = bloblist_findrec(tag);
276 return log_msg_ret("find", -ENOENT);
277 ret = bloblist_resize_rec(hdr, rec, new_size);
279 return log_msg_ret("resize", ret);
284 static u32 bloblist_calc_chksum(struct bloblist_hdr *hdr)
286 struct bloblist_rec *rec;
289 chksum = crc32(0, (unsigned char *)hdr,
290 offsetof(struct bloblist_hdr, chksum));
291 foreach_rec(rec, hdr) {
292 chksum = crc32(chksum, (void *)rec, rec->hdr_size);
293 chksum = crc32(chksum, (void *)rec + rec->hdr_size, rec->size);
299 int bloblist_new(ulong addr, uint size, uint flags)
301 struct bloblist_hdr *hdr;
303 if (size < sizeof(*hdr))
304 return log_ret(-ENOSPC);
305 if (addr & (BLOBLIST_ALIGN - 1))
306 return log_ret(-EFAULT);
307 hdr = map_sysmem(addr, size);
308 memset(hdr, '\0', sizeof(*hdr));
309 hdr->version = BLOBLIST_VERSION;
310 hdr->hdr_size = sizeof(*hdr);
312 hdr->magic = BLOBLIST_MAGIC;
314 hdr->alloced = hdr->hdr_size;
321 int bloblist_check(ulong addr, uint size)
323 struct bloblist_hdr *hdr;
326 hdr = map_sysmem(addr, sizeof(*hdr));
327 if (hdr->magic != BLOBLIST_MAGIC)
328 return log_msg_ret("Bad magic", -ENOENT);
329 if (hdr->version != BLOBLIST_VERSION)
330 return log_msg_ret("Bad version", -EPROTONOSUPPORT);
331 if (size && hdr->size != size)
332 return log_msg_ret("Bad size", -EFBIG);
333 chksum = bloblist_calc_chksum(hdr);
334 if (hdr->chksum != chksum) {
335 log(LOGC_BLOBLIST, LOGL_ERR, "Checksum %x != %x\n", hdr->chksum,
337 return log_msg_ret("Bad checksum", -EIO);
344 int bloblist_finish(void)
346 struct bloblist_hdr *hdr = gd->bloblist;
348 hdr->chksum = bloblist_calc_chksum(hdr);
353 void bloblist_get_stats(ulong *basep, ulong *sizep, ulong *allocedp)
355 struct bloblist_hdr *hdr = gd->bloblist;
357 *basep = map_to_sysmem(gd->bloblist);
359 *allocedp = hdr->alloced;
362 static void show_value(const char *prompt, ulong value)
364 printf("%s:%*s %-5lx ", prompt, 8 - (int)strlen(prompt), "", value);
365 print_size(value, "\n");
368 void bloblist_show_stats(void)
370 ulong base, size, alloced;
372 bloblist_get_stats(&base, &size, &alloced);
373 printf("base: %lx\n", base);
374 show_value("size", size);
375 show_value("alloced", alloced);
376 show_value("free", size - alloced);
379 void bloblist_show_list(void)
381 struct bloblist_hdr *hdr = gd->bloblist;
382 struct bloblist_rec *rec;
384 printf("%-8s %8s Tag Name\n", "Address", "Size");
385 for (rec = bloblist_first_blob(hdr); rec;
386 rec = bloblist_next_blob(hdr, rec)) {
387 printf("%08lx %8x %3d %s\n",
388 (ulong)map_to_sysmem((void *)rec + rec->hdr_size),
389 rec->size, rec->tag, bloblist_tag_name(rec->tag));
393 void bloblist_reloc(void *to, uint to_size, void *from, uint from_size)
395 struct bloblist_hdr *hdr;
397 memcpy(to, from, from_size);
402 int bloblist_init(void)
408 * Wed expect to find an existing bloblist in the first phase of U-Boot
411 expected = !u_boot_first_phase();
412 if (spl_prev_phase() == PHASE_TPL && !IS_ENABLED(CONFIG_TPL_BLOBLIST))
415 ret = bloblist_check(CONFIG_BLOBLIST_ADDR,
416 CONFIG_BLOBLIST_SIZE);
420 log(LOGC_BLOBLIST, expected ? LOGL_WARNING : LOGL_DEBUG,
421 "Existing bloblist not found: creating new bloblist\n");
422 if (IS_ENABLED(CONFIG_BLOBLIST_ALLOC)) {
423 void *ptr = memalign(BLOBLIST_ALIGN,
424 CONFIG_BLOBLIST_SIZE);
427 return log_msg_ret("alloc", -ENOMEM);
428 addr = map_to_sysmem(ptr);
430 addr = CONFIG_BLOBLIST_ADDR;
432 ret = bloblist_new(addr, CONFIG_BLOBLIST_SIZE, 0);
434 log(LOGC_BLOBLIST, LOGL_DEBUG, "Found existing bloblist\n");