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  *
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   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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  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 void write_sparse_image(
  49                 struct sparse_storage *info, const char *part_name,
  50                 void *data, unsigned sz, char *response_str)
  51 {
  52         lbaint_t blk;
  53         lbaint_t blkcnt;
  54         lbaint_t blks;
  55         uint32_t bytes_written = 0;
  56         unsigned int chunk;
  57         unsigned int offset;
  58         unsigned int chunk_data_sz;
  59         uint32_t *fill_buf = NULL;
  60         uint32_t fill_val;
  61         sparse_header_t *sparse_header;
  62         chunk_header_t *chunk_header;
  63         uint32_t total_blocks = 0;
  64         int i;
  65
  66         /* Read and skip over sparse image header */
  67         sparse_header = (sparse_header_t *)data;
  68
  69         data += sparse_header->file_hdr_sz;
  70         if (sparse_header->file_hdr_sz > sizeof(sparse_header_t)) {
  71                 /*
  72                  * Skip the remaining bytes in a header that is longer than
  73                  * we expected.
  74                  */
  75                 data += (sparse_header->file_hdr_sz - sizeof(sparse_header_t));
  76         }
  77
  78         debug("=== Sparse Image Header ===\n");
  79         debug("magic: 0x%x\n", sparse_header->magic);
  80         debug("major_version: 0x%x\n", sparse_header->major_version);
  81         debug("minor_version: 0x%x\n", sparse_header->minor_version);
  82         debug("file_hdr_sz: %d\n", sparse_header->file_hdr_sz);
  83         debug("chunk_hdr_sz: %d\n", sparse_header->chunk_hdr_sz);
  84         debug("blk_sz: %d\n", sparse_header->blk_sz);
  85         debug("total_blks: %d\n", sparse_header->total_blks);
  86         debug("total_chunks: %d\n", sparse_header->total_chunks);
  87
  88         /*
  89          * Verify that the sparse block size is a multiple of our
  90          * storage backend block size
  91          */
  92         div_u64_rem(sparse_header->blk_sz, info->blksz, &offset);
  93         if (offset) {
  94                 printf("%s: Sparse image block size issue [%u]\n",
  95                        __func__, sparse_header->blk_sz);
  96                 fastboot_fail(response_str, "sparse image block size issue");
  97                 return;
  98         }
  99
 100         puts("Flashing Sparse Image\n");
 101
 102         /* Start processing chunks */
 103         blk = info->start;
 104         for (chunk = 0; chunk < sparse_header->total_chunks; chunk++) {
 105                 /* Read and skip over chunk header */
 106                 chunk_header = (chunk_header_t *)data;
 107                 data += sizeof(chunk_header_t);
 108
 109                 if (chunk_header->chunk_type != CHUNK_TYPE_RAW) {
 110                         debug("=== Chunk Header ===\n");
 111                         debug("chunk_type: 0x%x\n", chunk_header->chunk_type);
 112                         debug("chunk_data_sz: 0x%x\n", chunk_header->chunk_sz);
 113                         debug("total_size: 0x%x\n", chunk_header->total_sz);
 114                 }
 115
 116                 if (sparse_header->chunk_hdr_sz > sizeof(chunk_header_t)) {
 117                         /*
 118                          * Skip the remaining bytes in a header that is longer
 119                          * than we expected.
 120                          */
 121                         data += (sparse_header->chunk_hdr_sz -
 122                                  sizeof(chunk_header_t));
 123                 }
 124
 125                 chunk_data_sz = sparse_header->blk_sz * chunk_header->chunk_sz;
 126                 blkcnt = chunk_data_sz / info->blksz;
 127                 switch (chunk_header->chunk_type) {
 128                 case CHUNK_TYPE_RAW:
 129                         if (chunk_header->total_sz !=
 130                             (sparse_header->chunk_hdr_sz + chunk_data_sz)) {
 131                                 fastboot_fail(response_str,
 132                                         "Bogus chunk size for chunk type Raw");
 133                                 return;
 134                         }
 135
 136                         if (blk + blkcnt > info->start + info->size) {
 137                                 printf(
 138                                     "%s: Request would exceed partition size!\n",
 139                                     __func__);
 140                                 fastboot_fail(response_str,
 141                                     "Request would exceed partition size!");
 142                                 return;
 143                         }
 144
 145                         blks = info->write(info, blk, blkcnt, data);
 146                         /* blks might be > blkcnt (eg. NAND bad-blocks) */
 147                         if (blks < blkcnt) {
 148                                 printf("%s: %s" LBAFU " [" LBAFU "]\n",
 149                                        __func__, "Write failed, block #",
 150                                        blk, blks);
 151                                 fastboot_fail(response_str,
 152                                               "flash write failure");
 153                                 return;
 154                         }
 155                         blk += blks;
 156                         bytes_written += blkcnt * info->blksz;
 157                         total_blocks += chunk_header->chunk_sz;
 158                         data += chunk_data_sz;
 159                         break;
 160
 161                 case CHUNK_TYPE_FILL:
 162                         if (chunk_header->total_sz !=
 163                             (sparse_header->chunk_hdr_sz + sizeof(uint32_t))) {
 164                                 fastboot_fail(response_str,
 165                                         "Bogus chunk size for chunk type FILL");
 166                                 return;
 167                         }
 168
 169                         fill_buf = (uint32_t *)
 170                                    memalign(ARCH_DMA_MINALIGN,
 171                                             ROUNDUP(info->blksz,
 172                                                     ARCH_DMA_MINALIGN));
 173                         if (!fill_buf) {
 174                                 fastboot_fail(response_str,
 175                                         "Malloc failed for: CHUNK_TYPE_FILL");
 176                                 return;
 177                         }
 178
 179                         fill_val = *(uint32_t *)data;
 180                         data = (char *)data + sizeof(uint32_t);
 181
 182                         for (i = 0; i < (info->blksz / sizeof(fill_val)); i++)
 183                                 fill_buf[i] = fill_val;
 184
 185                         if (blk + blkcnt > info->start + info->size) {
 186                                 printf(
 187                                     "%s: Request would exceed partition size!\n",
 188                                     __func__);
 189                                 fastboot_fail(response_str,
 190                                     "Request would exceed partition size!");
 191                                 return;
 192                         }
 193
 194                         for (i = 0; i < blkcnt; i++) {
 195                                 blks = info->write(info, blk, 1, fill_buf);
 196                                 /* blks might be > 1 (eg. NAND bad-blocks) */
 197                                 if (blks < 1) {
 198                                         printf("%s: %s, block # " LBAFU "\n",
 199                                                __func__, "Write failed", blk);
 200                                         fastboot_fail(response_str,
 201                                                       "flash write failure");
 202                                         free(fill_buf);
 203                                         return;
 204                                 }
 205                                 blk += blks;
 206                         }
 207                         bytes_written += blkcnt * info->blksz;
 208                         total_blocks += chunk_data_sz / sparse_header->blk_sz;
 209                         free(fill_buf);
 210                         break;
 211
 212                 case CHUNK_TYPE_DONT_CARE:
 213 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 214                         blk += blkcnt;
 215                         total_blocks += chunk_header->chunk_sz;
 216 #endif
 217                         break;
 218
 219                 case CHUNK_TYPE_CRC32:
 220                         if (chunk_header->total_sz !=
 221                             sparse_header->chunk_hdr_sz) {
 222                                 fastboot_fail(response_str,
 223                                         "Bogus chunk size for chunk type Dont Care");
 224                                 return;
 225                         }
 226                         total_blocks += chunk_header->chunk_sz;
 227                         data += chunk_data_sz;
 228                         break;
 229
 230                 default:
 231                         printf("%s: Unknown chunk type: %x\n", __func__,
 232                                chunk_header->chunk_type);
 233                         fastboot_fail(response_str, "Unknown chunk type");
 234                         return;
 235                 }
 236         }
 237
 238         debug("Wrote %d blocks, expected to write %d blocks\n",
 239               total_blocks, sparse_header->total_blks);
 240         printf("........ wrote %u bytes to '%s'\n", bytes_written, part_name);
 241
 242         if (total_blocks != sparse_header->total_blks)
 243                 fastboot_fail(response_str, "sparse image write failure");
 244         else
 245                 fastboot_okay(response_str, "");
 246
 247         return;
 248 }