lib/image-sparse.c

   1 /*
   2  * Copyright (c) 2009, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Copyright (c) 2009-2014, The Linux Foundation. All rights reserved.
   6  * Portions Copyright 2014 Broadcom Corporation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above copyright
  13  *       notice, this list of conditions and the following disclaimer in the
  14  *       documentation and/or other materials provided with the distribution.
  15  *     * Neither the name of The Linux Foundation nor
  16  *       the names of its contributors may be used to endorse or promote
  17  *       products derived from this software without specific prior written
  18  *       permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23  * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  27  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  28  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  29  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  30  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  * NOTE:
  33  *   Although it is very similar, this license text is not identical
  34  *   to the "BSD-3-Clause", therefore, DO NOT MODIFY THIS LICENSE TEXT!
  35  */
  36
  37 #include <config.h>
  38 #include <blk.h>
  39 #include <image-sparse.h>
  40 #include <div64.h>
  41 #include <log.h>
  42 #include <malloc.h>
  43 #include <part.h>
  44 #include <sparse_format.h>
  45 #include <asm/cache.h>
  46
  47 #include <linux/math64.h>
  48 #include <linux/err.h>
  49
  50 static void default_log(const char *ignored, char *response) {}
  51
  52 static lbaint_t write_sparse_chunk_raw(struct sparse_storage *info,
  53                                        lbaint_t blk, lbaint_t blkcnt,
  54                                        void *data,
  55                                        char *response)
  56 {
  57         lbaint_t n = blkcnt, write_blks, blks = 0;
  58         lbaint_t aligned_buf_blks = FASTBOOT_MAX_BLK_WRITE;
  59         uint32_t *aligned_buf = NULL;
  60
  61         if (CONFIG_IS_ENABLED(SYS_DCACHE_OFF)) {
  62                 write_blks = info->write(info, blk, n, data);
  63                 if (write_blks < n)
  64                         goto write_fail;
  65
  66                 return write_blks;
  67         }
  68
  69         aligned_buf = memalign(ARCH_DMA_MINALIGN, info->blksz * aligned_buf_blks);
  70         if (!aligned_buf) {
  71                 info->mssg("Malloc failed for: CHUNK_TYPE_RAW", response);
  72                 return -ENOMEM;
  73         }
  74
  75         while (blkcnt > 0) {
  76                 n = min(aligned_buf_blks, blkcnt);
  77                 memcpy(aligned_buf, data, n * info->blksz);
  78
  79                 /* write_blks might be > n due to NAND bad-blocks */
  80                 write_blks = info->write(info, blk + blks, n, aligned_buf);
  81                 if (write_blks < n) {
  82                         free(aligned_buf);
  83                         goto write_fail;
  84                 }
  85
  86                 blks += write_blks;
  87                 data += n * info->blksz;
  88                 blkcnt -= n;
  89         }
  90
  91         free(aligned_buf);
  92         return blks;
  93
  94 write_fail:
  95         if (IS_ERR_VALUE(write_blks)) {
  96                 printf("%s: Write failed, block #" LBAFU " [" LBAFU "] (%lld)\n",
  97                        __func__, blk + blks, n, (long long)write_blks);
  98                 info->mssg("flash write failure", response);
  99                 return write_blks;
 100         }
 101
 102         /* write_blks < n */
 103         printf("%s: Write failed, block #" LBAFU " [" LBAFU "]\n",
 104                __func__, blk + blks, n);
 105         info->mssg("flash write failure(incomplete)", response);
 106         return -1;
 107 }
 108
 109 int write_sparse_image(struct sparse_storage *info,
 110                        const char *part_name, void *data, char *response)
 111 {
 112         lbaint_t blk;
 113         lbaint_t blkcnt;
 114         lbaint_t blks;
 115         uint64_t bytes_written = 0;
 116         unsigned int chunk;
 117         unsigned int offset;
 118         uint64_t chunk_data_sz;
 119         uint32_t *fill_buf = NULL;
 120         uint32_t fill_val;
 121         sparse_header_t *sparse_header;
 122         chunk_header_t *chunk_header;
 123         uint32_t total_blocks = 0;
 124         int fill_buf_num_blks;
 125         int i;
 126         int j;
 127
 128         fill_buf_num_blks = CONFIG_IMAGE_SPARSE_FILLBUF_SIZE / info->blksz;
 129
 130         /* Read and skip over sparse image header */
 131         sparse_header = (sparse_header_t *)data;
 132
 133         data += sparse_header->file_hdr_sz;
 134         if (sparse_header->file_hdr_sz > sizeof(sparse_header_t)) {
 135                 /*
 136                  * Skip the remaining bytes in a header that is longer than
 137                  * we expected.
 138                  */
 139                 data += (sparse_header->file_hdr_sz - sizeof(sparse_header_t));
 140         }
 141
 142         if (!info->mssg)
 143                 info->mssg = default_log;
 144
 145         debug("=== Sparse Image Header ===\n");
 146         debug("magic: 0x%x\n", sparse_header->magic);
 147         debug("major_version: 0x%x\n", sparse_header->major_version);
 148         debug("minor_version: 0x%x\n", sparse_header->minor_version);
 149         debug("file_hdr_sz: %d\n", sparse_header->file_hdr_sz);
 150         debug("chunk_hdr_sz: %d\n", sparse_header->chunk_hdr_sz);
 151         debug("blk_sz: %d\n", sparse_header->blk_sz);
 152         debug("total_blks: %d\n", sparse_header->total_blks);
 153         debug("total_chunks: %d\n", sparse_header->total_chunks);
 154
 155         /*
 156          * Verify that the sparse block size is a multiple of our
 157          * storage backend block size
 158          */
 159         div_u64_rem(sparse_header->blk_sz, info->blksz, &offset);
 160         if (offset) {
 161                 printf("%s: Sparse image block size issue [%u]\n",
 162                        __func__, sparse_header->blk_sz);
 163                 info->mssg("sparse image block size issue", response);
 164                 return -1;
 165         }
 166
 167         puts("Flashing Sparse Image\n");
 168
 169         /* Start processing chunks */
 170         blk = info->start;
 171         for (chunk = 0; chunk < sparse_header->total_chunks; chunk++) {
 172                 /* Read and skip over chunk header */
 173                 chunk_header = (chunk_header_t *)data;
 174                 data += sizeof(chunk_header_t);
 175
 176                 if (chunk_header->chunk_type != CHUNK_TYPE_RAW) {
 177                         debug("=== Chunk Header ===\n");
 178                         debug("chunk_type: 0x%x\n", chunk_header->chunk_type);
 179                         debug("chunk_data_sz: 0x%x\n", chunk_header->chunk_sz);
 180                         debug("total_size: 0x%x\n", chunk_header->total_sz);
 181                 }
 182
 183                 if (sparse_header->chunk_hdr_sz > sizeof(chunk_header_t)) {
 184                         /*
 185                          * Skip the remaining bytes in a header that is longer
 186                          * than we expected.
 187                          */
 188                         data += (sparse_header->chunk_hdr_sz -
 189                                  sizeof(chunk_header_t));
 190                 }
 191
 192                 chunk_data_sz = ((u64)sparse_header->blk_sz) * chunk_header->chunk_sz;
 193                 blkcnt = DIV_ROUND_UP_ULL(chunk_data_sz, info->blksz);
 194                 switch (chunk_header->chunk_type) {
 195                 case CHUNK_TYPE_RAW:
 196                         if (chunk_header->total_sz !=
 197                             (sparse_header->chunk_hdr_sz + chunk_data_sz)) {
 198                                 info->mssg("Bogus chunk size for chunk type Raw",
 199                                            response);
 200                                 return -1;
 201                         }
 202
 203                         if (blk + blkcnt > info->start + info->size) {
 204                                 printf(
 205                                     "%s: Request would exceed partition size!\n",
 206                                     __func__);
 207                                 info->mssg("Request would exceed partition size!",
 208                                            response);
 209                                 return -1;
 210                         }
 211
 212                         blks = write_sparse_chunk_raw(info, blk, blkcnt,
 213                                                       data, response);
 214                         if (IS_ERR_VALUE(blks))
 215                                 return -1;
 216
 217                         blk += blks;
 218                         bytes_written += ((u64)blkcnt) * info->blksz;
 219                         total_blocks += chunk_header->chunk_sz;
 220                         data += chunk_data_sz;
 221                         break;
 222
 223                 case CHUNK_TYPE_FILL:
 224                         if (chunk_header->total_sz !=
 225                             (sparse_header->chunk_hdr_sz + sizeof(uint32_t))) {
 226                                 info->mssg("Bogus chunk size for chunk type FILL", response);
 227                                 return -1;
 228                         }
 229
 230                         fill_buf = (uint32_t *)
 231                                    memalign(ARCH_DMA_MINALIGN,
 232                                             ROUNDUP(
 233                                                 info->blksz * fill_buf_num_blks,
 234                                                 ARCH_DMA_MINALIGN));
 235                         if (!fill_buf) {
 236                                 info->mssg("Malloc failed for: CHUNK_TYPE_FILL",
 237                                            response);
 238                                 return -1;
 239                         }
 240
 241                         fill_val = *(uint32_t *)data;
 242                         data = (char *)data + sizeof(uint32_t);
 243
 244                         for (i = 0;
 245                              i < (info->blksz * fill_buf_num_blks /
 246                                   sizeof(fill_val));
 247                              i++)
 248                                 fill_buf[i] = fill_val;
 249
 250                         if (blk + blkcnt > info->start + info->size) {
 251                                 printf(
 252                                     "%s: Request would exceed partition size!\n",
 253                                     __func__);
 254                                 info->mssg("Request would exceed partition size!",
 255                                            response);
 256                                 return -1;
 257                         }
 258
 259                         for (i = 0; i < blkcnt;) {
 260                                 j = blkcnt - i;
 261                                 if (j > fill_buf_num_blks)
 262                                         j = fill_buf_num_blks;
 263                                 blks = info->write(info, blk, j, fill_buf);
 264                                 /* blks might be > j (eg. NAND bad-blocks) */
 265                                 if (blks < j) {
 266                                         printf("%s: %s " LBAFU " [%d]\n",
 267                                                __func__,
 268                                                "Write failed, block #",
 269                                                blk, j);
 270                                         info->mssg("flash write failure",
 271                                                    response);
 272                                         free(fill_buf);
 273                                         return -1;
 274                                 }
 275                                 blk += blks;
 276                                 i += j;
 277                         }
 278                         bytes_written += ((u64)blkcnt) * info->blksz;
 279                         total_blocks += DIV_ROUND_UP_ULL(chunk_data_sz,
 280                                                          sparse_header->blk_sz);
 281                         free(fill_buf);
 282                         break;
 283
 284                 case CHUNK_TYPE_DONT_CARE:
 285                         blk += info->reserve(info, blk, blkcnt);
 286                         total_blocks += chunk_header->chunk_sz;
 287                         break;
 288
 289                 case CHUNK_TYPE_CRC32:
 290                         if (chunk_header->total_sz !=
 291                             sparse_header->chunk_hdr_sz + sizeof(uint32_t)) {
 292                                 info->mssg("Bogus chunk size for chunk type CRC32",
 293                                            response);
 294                                 return -1;
 295                         }
 296                         total_blocks += chunk_header->chunk_sz;
 297                         data += chunk_data_sz;
 298                         break;
 299
 300                 default:
 301                         printf("%s: Unknown chunk type: %x\n", __func__,
 302                                chunk_header->chunk_type);
 303                         info->mssg("Unknown chunk type", response);
 304                         return -1;
 305                 }
 306         }
 307
 308         debug("Wrote %d blocks, expected to write %d blocks\n",
 309               total_blocks, sparse_header->total_blks);
 310         printf("........ wrote %llu bytes to '%s'\n", bytes_written, part_name);
 311
 312         if (total_blocks != sparse_header->total_blks) {
 313                 info->mssg("sparse image write failure", response);
 314                 return -1;
 315         }
 316
 317         return 0;
 318 }