common/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,
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  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 <common.h>
  39 #include <image-sparse.h>
  40 #include <div64.h>
  41 #include <malloc.h>
  42 #include <part.h>
  43 #include <sparse_format.h>
  44 #include <fastboot.h>
  45
  46 #include <linux/math64.h>
  47
  48 #ifndef CONFIG_FASTBOOT_FLASH_FILLBUF_SIZE
  49 #define CONFIG_FASTBOOT_FLASH_FILLBUF_SIZE (1024 * 512)
  50 #endif
  51
  52 void write_sparse_image(
  53                 struct sparse_storage *info, const char *part_name,
  54                 void *data, unsigned sz)
  55 {
  56         lbaint_t blk;
  57         lbaint_t blkcnt;
  58         lbaint_t blks;
  59         uint32_t bytes_written = 0;
  60         unsigned int chunk;
  61         unsigned int offset;
  62         unsigned int chunk_data_sz;
  63         uint32_t *fill_buf = NULL;
  64         uint32_t fill_val;
  65         sparse_header_t *sparse_header;
  66         chunk_header_t *chunk_header;
  67         uint32_t total_blocks = 0;
  68         int fill_buf_num_blks;
  69         int i;
  70         int j;
  71
  72         fill_buf_num_blks = CONFIG_FASTBOOT_FLASH_FILLBUF_SIZE / info->blksz;
  73
  74         /* Read and skip over sparse image header */
  75         sparse_header = (sparse_header_t *)data;
  76
  77         data += sparse_header->file_hdr_sz;
  78         if (sparse_header->file_hdr_sz > sizeof(sparse_header_t)) {
  79                 /*
  80                  * Skip the remaining bytes in a header that is longer than
  81                  * we expected.
  82                  */
  83                 data += (sparse_header->file_hdr_sz - sizeof(sparse_header_t));
  84         }
  85
  86         debug("=== Sparse Image Header ===\n");
  87         debug("magic: 0x%x\n", sparse_header->magic);
  88         debug("major_version: 0x%x\n", sparse_header->major_version);
  89         debug("minor_version: 0x%x\n", sparse_header->minor_version);
  90         debug("file_hdr_sz: %d\n", sparse_header->file_hdr_sz);
  91         debug("chunk_hdr_sz: %d\n", sparse_header->chunk_hdr_sz);
  92         debug("blk_sz: %d\n", sparse_header->blk_sz);
  93         debug("total_blks: %d\n", sparse_header->total_blks);
  94         debug("total_chunks: %d\n", sparse_header->total_chunks);
  95
  96         /*
  97          * Verify that the sparse block size is a multiple of our
  98          * storage backend block size
  99          */
 100         div_u64_rem(sparse_header->blk_sz, info->blksz, &offset);
 101         if (offset) {
 102                 printf("%s: Sparse image block size issue [%u]\n",
 103                        __func__, sparse_header->blk_sz);
 104                 fastboot_fail("sparse image block size issue");
 105                 return;
 106         }
 107
 108         puts("Flashing Sparse Image\n");
 109
 110         /* Start processing chunks */
 111         blk = info->start;
 112         for (chunk = 0; chunk < sparse_header->total_chunks; chunk++) {
 113                 /* Read and skip over chunk header */
 114                 chunk_header = (chunk_header_t *)data;
 115                 data += sizeof(chunk_header_t);
 116
 117                 if (chunk_header->chunk_type != CHUNK_TYPE_RAW) {
 118                         debug("=== Chunk Header ===\n");
 119                         debug("chunk_type: 0x%x\n", chunk_header->chunk_type);
 120                         debug("chunk_data_sz: 0x%x\n", chunk_header->chunk_sz);
 121                         debug("total_size: 0x%x\n", chunk_header->total_sz);
 122                 }
 123
 124                 if (sparse_header->chunk_hdr_sz > sizeof(chunk_header_t)) {
 125                         /*
 126                          * Skip the remaining bytes in a header that is longer
 127                          * than we expected.
 128                          */
 129                         data += (sparse_header->chunk_hdr_sz -
 130                                  sizeof(chunk_header_t));
 131                 }
 132
 133                 chunk_data_sz = sparse_header->blk_sz * chunk_header->chunk_sz;
 134                 blkcnt = chunk_data_sz / info->blksz;
 135                 switch (chunk_header->chunk_type) {
 136                 case CHUNK_TYPE_RAW:
 137                         if (chunk_header->total_sz !=
 138                             (sparse_header->chunk_hdr_sz + chunk_data_sz)) {
 139                                 fastboot_fail(
 140                                         "Bogus chunk size for chunk type Raw");
 141                                 return;
 142                         }
 143
 144                         if (blk + blkcnt > info->start + info->size) {
 145                                 printf(
 146                                     "%s: Request would exceed partition size!\n",
 147                                     __func__);
 148                                 fastboot_fail(
 149                                     "Request would exceed partition size!");
 150                                 return;
 151                         }
 152
 153                         blks = info->write(info, blk, blkcnt, data);
 154                         /* blks might be > blkcnt (eg. NAND bad-blocks) */
 155                         if (blks < blkcnt) {
 156                                 printf("%s: %s" LBAFU " [" LBAFU "]\n",
 157                                        __func__, "Write failed, block #",
 158                                        blk, blks);
 159                                 fastboot_fail(
 160                                               "flash write failure");
 161                                 return;
 162                         }
 163                         blk += blks;
 164                         bytes_written += blkcnt * info->blksz;
 165                         total_blocks += chunk_header->chunk_sz;
 166                         data += chunk_data_sz;
 167                         break;
 168
 169                 case CHUNK_TYPE_FILL:
 170                         if (chunk_header->total_sz !=
 171                             (sparse_header->chunk_hdr_sz + sizeof(uint32_t))) {
 172                                 fastboot_fail(
 173                                         "Bogus chunk size for chunk type FILL");
 174                                 return;
 175                         }
 176
 177                         fill_buf = (uint32_t *)
 178                                    memalign(ARCH_DMA_MINALIGN,
 179                                             ROUNDUP(
 180                                                 info->blksz * fill_buf_num_blks,
 181                                                 ARCH_DMA_MINALIGN));
 182                         if (!fill_buf) {
 183                                 fastboot_fail(
 184                                         "Malloc failed for: CHUNK_TYPE_FILL");
 185                                 return;
 186                         }
 187
 188                         fill_val = *(uint32_t *)data;
 189                         data = (char *)data + sizeof(uint32_t);
 190
 191                         for (i = 0;
 192                              i < (info->blksz * fill_buf_num_blks /
 193                                   sizeof(fill_val));
 194                              i++)
 195                                 fill_buf[i] = fill_val;
 196
 197                         if (blk + blkcnt > info->start + info->size) {
 198                                 printf(
 199                                     "%s: Request would exceed partition size!\n",
 200                                     __func__);
 201                                 fastboot_fail(
 202                                     "Request would exceed partition size!");
 203                                 return;
 204                         }
 205
 206                         for (i = 0; i < blkcnt;) {
 207                                 j = blkcnt - i;
 208                                 if (j > fill_buf_num_blks)
 209                                         j = fill_buf_num_blks;
 210                                 blks = info->write(info, blk, j, fill_buf);
 211                                 /* blks might be > j (eg. NAND bad-blocks) */
 212                                 if (blks < j) {
 213                                         printf("%s: %s " LBAFU " [%d]\n",
 214                                                __func__,
 215                                                "Write failed, block #",
 216                                                blk, j);
 217                                         fastboot_fail(
 218                                                       "flash write failure");
 219                                         free(fill_buf);
 220                                         return;
 221                                 }
 222                                 blk += blks;
 223                                 i += j;
 224                         }
 225                         bytes_written += blkcnt * info->blksz;
 226                         total_blocks += chunk_data_sz / sparse_header->blk_sz;
 227                         free(fill_buf);
 228                         break;
 229
 230                 case CHUNK_TYPE_DONT_CARE:
 231                         blk += info->reserve(info, blk, blkcnt);
 232                         total_blocks += chunk_header->chunk_sz;
 233                         break;
 234
 235                 case CHUNK_TYPE_CRC32:
 236                         if (chunk_header->total_sz !=
 237                             sparse_header->chunk_hdr_sz) {
 238                                 fastboot_fail(
 239                                         "Bogus chunk size for chunk type Dont Care");
 240                                 return;
 241                         }
 242                         total_blocks += chunk_header->chunk_sz;
 243                         data += chunk_data_sz;
 244                         break;
 245
 246                 default:
 247                         printf("%s: Unknown chunk type: %x\n", __func__,
 248                                chunk_header->chunk_type);
 249                         fastboot_fail("Unknown chunk type");
 250                         return;
 251                 }
 252         }
 253
 254         debug("Wrote %d blocks, expected to write %d blocks\n",
 255               total_blocks, sparse_header->total_blks);
 256         printf("........ wrote %u bytes to '%s'\n", bytes_written, part_name);
 257
 258         if (total_blocks != sparse_header->total_blks)
 259                 fastboot_fail("sparse image write failure");
 260         else
 261                 fastboot_okay("");
 262
 263         return;
 264 }