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 <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 <asm/cache.h>
  45
  46 #include <linux/math64.h>
  47
  48 static void default_log(const char *ignored, char *response) {}
  49
  50 int write_sparse_image(struct sparse_storage *info,
  51                        const char *part_name, void *data, char *response)
  52 {
  53         lbaint_t blk;
  54         lbaint_t blkcnt;
  55         lbaint_t blks;
  56         uint32_t bytes_written = 0;
  57         unsigned int chunk;
  58         unsigned int offset;
  59         unsigned int chunk_data_sz;
  60         uint32_t *fill_buf = NULL;
  61         uint32_t fill_val;
  62         sparse_header_t *sparse_header;
  63         chunk_header_t *chunk_header;
  64         uint32_t total_blocks = 0;
  65         int fill_buf_num_blks;
  66         int i;
  67         int j;
  68
  69         fill_buf_num_blks = CONFIG_IMAGE_SPARSE_FILLBUF_SIZE / info->blksz;
  70
  71         /* Read and skip over sparse image header */
  72         sparse_header = (sparse_header_t *)data;
  73
  74         data += sparse_header->file_hdr_sz;
  75         if (sparse_header->file_hdr_sz > sizeof(sparse_header_t)) {
  76                 /*
  77                  * Skip the remaining bytes in a header that is longer than
  78                  * we expected.
  79                  */
  80                 data += (sparse_header->file_hdr_sz - sizeof(sparse_header_t));
  81         }
  82
  83         if (!info->mssg)
  84                 info->mssg = default_log;
  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                 info->mssg("sparse image block size issue", response);
 105                 return -1;
 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                                 info->mssg("Bogus chunk size for chunk type Raw",
 140                                            response);
 141                                 return -1;
 142                         }
 143
 144                         if (blk + blkcnt > info->start + info->size) {
 145                                 printf(
 146                                     "%s: Request would exceed partition size!\n",
 147                                     __func__);
 148                                 info->mssg("Request would exceed partition size!",
 149                                            response);
 150                                 return -1;
 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                                 info->mssg("flash write failure", response);
 160                                 return -1;
 161                         }
 162                         blk += blks;
 163                         bytes_written += blkcnt * info->blksz;
 164                         total_blocks += chunk_header->chunk_sz;
 165                         data += chunk_data_sz;
 166                         break;
 167
 168                 case CHUNK_TYPE_FILL:
 169                         if (chunk_header->total_sz !=
 170                             (sparse_header->chunk_hdr_sz + sizeof(uint32_t))) {
 171                                 info->mssg("Bogus chunk size for chunk type FILL", response);
 172                                 return -1;
 173                         }
 174
 175                         fill_buf = (uint32_t *)
 176                                    memalign(ARCH_DMA_MINALIGN,
 177                                             ROUNDUP(
 178                                                 info->blksz * fill_buf_num_blks,
 179                                                 ARCH_DMA_MINALIGN));
 180                         if (!fill_buf) {
 181                                 info->mssg("Malloc failed for: CHUNK_TYPE_FILL",
 182                                            response);
 183                                 return -1;
 184                         }
 185
 186                         fill_val = *(uint32_t *)data;
 187                         data = (char *)data + sizeof(uint32_t);
 188
 189                         for (i = 0;
 190                              i < (info->blksz * fill_buf_num_blks /
 191                                   sizeof(fill_val));
 192                              i++)
 193                                 fill_buf[i] = fill_val;
 194
 195                         if (blk + blkcnt > info->start + info->size) {
 196                                 printf(
 197                                     "%s: Request would exceed partition size!\n",
 198                                     __func__);
 199                                 info->mssg("Request would exceed partition size!",
 200                                            response);
 201                                 return -1;
 202                         }
 203
 204                         for (i = 0; i < blkcnt;) {
 205                                 j = blkcnt - i;
 206                                 if (j > fill_buf_num_blks)
 207                                         j = fill_buf_num_blks;
 208                                 blks = info->write(info, blk, j, fill_buf);
 209                                 /* blks might be > j (eg. NAND bad-blocks) */
 210                                 if (blks < j) {
 211                                         printf("%s: %s " LBAFU " [%d]\n",
 212                                                __func__,
 213                                                "Write failed, block #",
 214                                                blk, j);
 215                                         info->mssg("flash write failure",
 216                                                    response);
 217                                         free(fill_buf);
 218                                         return -1;
 219                                 }
 220                                 blk += blks;
 221                                 i += j;
 222                         }
 223                         bytes_written += blkcnt * info->blksz;
 224                         total_blocks += chunk_data_sz / sparse_header->blk_sz;
 225                         free(fill_buf);
 226                         break;
 227
 228                 case CHUNK_TYPE_DONT_CARE:
 229                         blk += info->reserve(info, blk, blkcnt);
 230                         total_blocks += chunk_header->chunk_sz;
 231                         break;
 232
 233                 case CHUNK_TYPE_CRC32:
 234                         if (chunk_header->total_sz !=
 235                             sparse_header->chunk_hdr_sz) {
 236                                 info->mssg("Bogus chunk size for chunk type Dont Care",
 237                                            response);
 238                                 return -1;
 239                         }
 240                         total_blocks += chunk_header->chunk_sz;
 241                         data += chunk_data_sz;
 242                         break;
 243
 244                 default:
 245                         printf("%s: Unknown chunk type: %x\n", __func__,
 246                                chunk_header->chunk_type);
 247                         info->mssg("Unknown chunk type", response);
 248                         return -1;
 249                 }
 250         }
 251
 252         debug("Wrote %d blocks, expected to write %d blocks\n",
 253               total_blocks, sparse_header->total_blks);
 254         printf("........ wrote %u bytes to '%s'\n", bytes_written, part_name);
 255
 256         if (total_blocks != sparse_header->total_blks) {
 257                 info->mssg("sparse image write failure", response);
 258                 return -1;
 259         }
 260
 261         return 0;
 262 }