[PATCH v2 05/14] toradex: tdx-cfg-clock: add migration routine from PID8

Igor Opaniuk
2020-07-15T10:30:56Z

From: Igor Opaniuk <igor.opaniuk@toradex.com>

Add migration routine from PID8 pre-stored values on EEPROM
(including sane value checks).

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
---

(no changes since v1)

board/toradex/common/tdx-cfg-block.c | 78 ++++++++++++++++++++++++++++
board/toradex/common/tdx-cfg-block.h | 2 +
2 files changed, 80 insertions(+)

diff --git a/board/toradex/common/tdx-cfg-block.c b/board/toradex/common/tdx-cfg-block.c
index 5162ed48b8..bf27b2fa66 100644
--- a/board/toradex/common/tdx-cfg-block.c
+++ b/board/toradex/common/tdx-cfg-block.c
@@ -649,6 +649,84 @@ out:
return ret;
}

+int check_pid8_sanity(char *pid8)
+{
+ char s_carrierid_verdin_dev[5];
+ char s_carrierid_dahlia[5];
+
+ sprintf(s_carrierid_verdin_dev, "0%d", VERDIN_DEVELOPMENT_BOARD);
+ sprintf(s_carrierid_dahlia, "0%d", DAHLIA);
+
+ /* sane value check, first 4 chars which represent carrier id */
+ if (!strncmp(pid8, s_carrierid_verdin_dev, 4))
+ return 0;
+
+ if (!strncmp(pid8, s_carrierid_dahlia, 4))
+ return 0;
+
+ return -EINVAL;
+}
+
+int try_migrate_tdx_cfg_block_carrier(void)
+{
+ char pid8[8];
+ int offset = 0;
+ int ret = CMD_RET_SUCCESS;
+ size_t size = TDX_CFG_BLOCK_EXTRA_MAX_SIZE;
+ u8 *config_block;
+
+ memset(pid8, 0x0, 8);
+ ret = read_tdx_eeprom_data(TDX_EEPROM_ID_CARRIER, 0x0, (u8 *)pid8, 8);
+ if (ret)
+ return ret;
+
+ if (check_pid8_sanity(pid8))
+ return -EINVAL;
+
+ /* Allocate RAM area for config block */
+ config_block = memalign(ARCH_DMA_MINALIGN, size);
+ if (!config_block) {
+ printf("Not enough malloc space available!\n");
+ return CMD_RET_FAILURE;
+ }
+
+ memset(config_block, 0xff, size);
+ /* we try parse PID8 concatenating zeroed serial number */
+ tdx_car_hw_tag.ver_major = pid8[4] - '0';
+ tdx_car_hw_tag.ver_minor = pid8[5] - '0';
+ tdx_car_hw_tag.ver_assembly = pid8[7] - '0';
+
+ pid8[4] = '\0';
+ tdx_car_hw_tag.prodid = simple_strtoul(pid8, NULL, 10);
+
+ /* Valid Tag */
+ write_tag(config_block, &offset, TAG_VALID, NULL, 0);
+
+ /* Product Tag */
+ write_tag(config_block, &offset, TAG_HW, (u8 *)&tdx_car_hw_tag,
+ sizeof(tdx_car_hw_tag));
+
+ /* Serial Tag */
+ write_tag(config_block, &offset, TAG_CAR_SERIAL, (u8 *)&tdx_car_serial,
+ sizeof(tdx_car_serial));
+
+ memset(config_block + offset, 0, 32 - offset);
+ ret = write_tdx_eeprom_data(TDX_EEPROM_ID_CARRIER, 0x0, config_block,
+ size);
+ if (ret) {
+ printf("Failed to write Toradex Extra config block: %d\n",
+ ret);
+ ret = CMD_RET_FAILURE;
+ goto out;
+ }
+
+ printf("Successfully migrated to Toradex Config Block from PID8\n");
+
+out:
+ free(config_block);
+ return ret;
+}
+
static int get_cfgblock_carrier_interactive(void)
{
char message[CONFIG_SYS_CBSIZE];
diff --git a/board/toradex/common/tdx-cfg-block.h b/board/toradex/common/tdx-cfg-block.h
index e18da3370e..8f91d9aec6 100644
--- a/board/toradex/common/tdx-cfg-block.h
+++ b/board/toradex/common/tdx-cfg-block.h
@@ -102,4 +102,6 @@ extern u32 tdx_car_serial;
int read_tdx_cfg_block(void);
int read_tdx_cfg_block_carrier(void);

+int try_migrate_tdx_cfg_block_carrier(void);
+
#endif /* _TDX_CFG_BLOCK_H */
--
2.17.1