| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Permission is hereby granted, free of charge, to any person |
| * obtaining a copy of this software and associated documentation |
| * files (the "Software"), to deal in the Software without |
| * restriction, including without limitation the rights to use, copy, |
| * modify, merge, publish, distribute, sublicense, and/or sell copies |
| * of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be |
| * included in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #include <trusty/rpmb.h> |
| #include <trusty/trusty_dev.h> |
| #include <trusty/util.h> |
| |
| #include <common.h> |
| #include <mmc.h> |
| |
| void *rpmb_storage_get_ctx(void) |
| { |
| int ret; |
| struct mmc *mmc = find_mmc_device(0); |
| |
| /* Switch to RPMB partition */ |
| if (mmc->part_num != MMC_PART_RPMB) { |
| ret = mmc_switch_part(0, MMC_PART_RPMB); |
| if (ret) { |
| trusty_error("failed to switch to RPMB partition\n"); |
| return NULL; |
| } |
| mmc->part_num = MMC_PART_RPMB; |
| } |
| return (void *)mmc; |
| } |
| |
| int rpmb_storage_send(void *rpmb_dev, const void *rel_write_data, |
| size_t rel_write_size, const void *write_data, |
| size_t write_size, void *read_buf, size_t read_size) |
| { |
| ALLOC_CACHE_ALIGN_BUFFER(uint8_t, rpmb_rel_write_data, rel_write_size); |
| ALLOC_CACHE_ALIGN_BUFFER(uint8_t, rpmb_write_data, write_size); |
| ALLOC_CACHE_ALIGN_BUFFER(uint8_t, rpmb_read_data, read_size); |
| int ret; |
| |
| if (rel_write_size) { |
| if (rel_write_size % MMC_BLOCK_SIZE) { |
| trusty_error( |
| "rel_write_size is not a multiple of MMC_BLOCK_SIZE: %d\n", |
| rel_write_size); |
| return TRUSTY_ERR_INVALID_ARGS; |
| } |
| memcpy(rpmb_rel_write_data, rel_write_data, rel_write_size); |
| ret = mmc_rpmb_request(rpmb_dev, |
| (const struct s_rpmb *)rpmb_rel_write_data, |
| rel_write_size / MMC_BLOCK_SIZE, true); |
| if (ret) { |
| trusty_error("failed to execute rpmb reliable write\n"); |
| return ret; |
| } |
| } |
| if (write_size) { |
| if (write_size % MMC_BLOCK_SIZE) { |
| trusty_error("write_size is not a multiple of MMC_BLOCK_SIZE: %d\n", |
| write_size); |
| return TRUSTY_ERR_INVALID_ARGS; |
| } |
| memcpy(rpmb_write_data, write_data, write_size); |
| ret = mmc_rpmb_request(rpmb_dev, (const struct s_rpmb *)rpmb_write_data, |
| write_size / MMC_BLOCK_SIZE, false); |
| if (ret) { |
| trusty_error("failed to execute rpmb write\n"); |
| return ret; |
| } |
| } |
| if (read_size) { |
| if (read_size % MMC_BLOCK_SIZE) { |
| trusty_error("read_size is not a multiple of MMC_BLOCK_SIZE: %d\n", |
| read_size); |
| return TRUSTY_ERR_INVALID_ARGS; |
| } |
| ret = mmc_rpmb_response(rpmb_dev, (struct s_rpmb *)rpmb_read_data, |
| read_size / MMC_BLOCK_SIZE, 0); |
| memcpy((void *)read_buf, rpmb_read_data, read_size); |
| if (ret) { |
| trusty_error("failed to execute rpmb read\n"); |
| return ret; |
| } |
| } |
| return TRUSTY_ERR_NONE; |
| } |