diff options
Diffstat (limited to 'src/security')
| -rw-r--r-- | src/security/vboot/ec_sync.c | 48 |
1 files changed, 21 insertions, 27 deletions
diff --git a/src/security/vboot/ec_sync.c b/src/security/vboot/ec_sync.c index 7e3d29a4ab..f31b78337b 100644 --- a/src/security/vboot/ec_sync.c +++ b/src/security/vboot/ec_sync.c @@ -240,11 +240,10 @@ static enum ec_flash_region vboot_to_ec_region(enum vb2_firmware_selection selec } /* - * Read the EC's burst size bytes at a time from CBFS, and then send - * the chunk to the EC for it to write into its flash. + * Send an image to the EC in burst-sized chunks. */ -static vb2_error_t ec_flash_write(struct region_device *image_region, - uint32_t region_offset, int image_size) +static vb2_error_t ec_flash_write(void *image, uint32_t region_offset, + int image_size) { struct ec_response_get_protocol_info resp_proto; struct ec_response_flash_info resp_flash; @@ -295,24 +294,17 @@ static vb2_error_t ec_flash_write(struct region_device *image_region, /* Fill up the buffer */ end = region_offset + image_size; + file_buf = image; for (off = region_offset; off < end; off += burst) { uint32_t todo = MIN(end - off, burst); uint32_t xfer_size = todo + sizeof(*params); - /* Map 'todo' bytes into memory */ - file_buf = rdev_mmap(image_region, off - region_offset, todo); - if (file_buf == NULL) - return VB2_ERROR_UNKNOWN; - params->offset = off; params->size = todo; /* Read todo bytes into the buffer */ memcpy(params + 1, file_buf, todo); - if (rdev_munmap(image_region, file_buf)) - return VB2_ERROR_UNKNOWN; - /* Make sure to add back in the size of the parameters */ if (google_chromeec_flash_write_block( (const uint8_t *)params, xfer_size)) { @@ -320,6 +312,8 @@ static vb2_error_t ec_flash_write(struct region_device *image_region, "relative offset %u!\n", off - region_offset); return VB2_ERROR_UNKNOWN; } + + file_buf += todo; } return VB2_SUCCESS; @@ -333,10 +327,8 @@ static vb2_error_t ec_update_image(enum vb2_firmware_selection select) uint32_t region_offset, region_size; enum ec_flash_region region; vb2_error_t rv; + void *image; size_t image_size; - struct cbfsf fh; - const char *filename; - struct region_device image_region; /* Un-protect the flash region */ rv = ec_protect_flash(select, 0); @@ -351,32 +343,34 @@ static vb2_error_t ec_update_image(enum vb2_firmware_selection select) ®ion_size)) return VB2_ERROR_UNKNOWN; - /* Locate the CBFS file */ - filename = EC_IMAGE_FILENAME(select); - if (cbfs_boot_locate(&fh, filename, NULL)) + /* Map the CBFS file */ + image = cbfs_map(EC_IMAGE_FILENAME(select), &image_size); + if (!image) return VB2_ERROR_UNKNOWN; - /* Get the file size and the region struct */ - image_size = region_device_sz(&fh.data); - cbfs_file_data(&image_region, &fh); + rv = VB2_ERROR_UNKNOWN; /* Bail if the image is too large */ if (image_size > region_size) - return VB2_ERROR_INVALID_PARAMETER; + goto unmap; /* Erase the region */ if (google_chromeec_flash_erase(region_offset, region_size)) - return VB2_ERROR_UNKNOWN; + goto unmap; /* Write the image into the region */ - if (ec_flash_write(&image_region, region_offset, image_size)) - return VB2_ERROR_UNKNOWN; + if (ec_flash_write(image, region_offset, image_size)) + goto unmap; /* Verify the image */ if (google_chromeec_efs_verify(region)) - return VB2_ERROR_UNKNOWN; + goto unmap; - return VB2_SUCCESS; + rv = VB2_SUCCESS; + +unmap: + cbfs_unmap(image); + return rv; } static vb2_error_t ec_get_expected_hash(enum vb2_firmware_selection select, |