From e82ab4c8906fc2e1e42065e4207ff0c36f343553 Mon Sep 17 00:00:00 2001 From: Patrick Delaunay Date: Mon, 28 Mar 2022 19:25:28 +0200 Subject: [PATCH] stm32mp: stm32prog: add TEE support in stm32prog command When OP-TEE is used, the SMC for BSEC management are not available and the PTA provisioning for OTP must be used. U-Boot opens the session to this PTA and use it for OTP access. Signed-off-by: Patrick Delaunay Reviewed-by: Patrice Chotard Signed-off-by: Patrice Chotard --- arch/arm/mach-stm32mp/cmd_stm32prog/Kconfig | 2 +- .../mach-stm32mp/cmd_stm32prog/stm32prog.c | 145 ++++++++++++++++-- .../mach-stm32mp/cmd_stm32prog/stm32prog.h | 7 +- .../cmd_stm32prog/stm32prog_usb.c | 2 +- 4 files changed, 142 insertions(+), 14 deletions(-) diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/Kconfig b/arch/arm/mach-stm32mp/cmd_stm32prog/Kconfig index 81d2b87035..8f91db4b46 100644 --- a/arch/arm/mach-stm32mp/cmd_stm32prog/Kconfig +++ b/arch/arm/mach-stm32mp/cmd_stm32prog/Kconfig @@ -35,6 +35,6 @@ config CMD_STM32PROG_SERIAL config CMD_STM32PROG_OTP bool "support stm32prog for OTP update" depends on CMD_STM32PROG - default y if ARM_SMCCC + default y if ARM_SMCCC || OPTEE help Support the OTP update with the command "stm32prog" for STM32MP diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c index 3e9354b51d..5d53e6146f 100644 --- a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c +++ b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c @@ -10,8 +10,10 @@ #include #include #include +#include #include #include +#include #include #include #include @@ -79,8 +81,110 @@ struct fip_toc_header { u64 flags; }; +#define TA_NVMEM_UUID { 0x1a8342cc, 0x81a5, 0x4512, \ + { 0x99, 0xfe, 0x9e, 0x2b, 0x3e, 0x37, 0xd6, 0x26 } } + +/* + * Read NVMEM memory for STM32CubeProgrammer + * + * [in] value[0].a: Type (0 for OTP access) + * [out] memref[1].buffer Output buffer to return all read values + * [out] memref[1].size Size of buffer to be read + * + * Return codes: + * TEE_SUCCESS - Invoke command success + * TEE_ERROR_BAD_PARAMETERS - Incorrect input param + */ +#define TA_NVMEM_READ 0x0 + +/* + * Write NVMEM memory for STM32CubeProgrammer + * + * [in] value[0].a Type (0 for OTP access) + * [in] memref[1].buffer Input buffer with the values to write + * [in] memref[1].size Size of buffer to be written + * + * Return codes: + * TEE_SUCCESS - Invoke command success + * TEE_ERROR_BAD_PARAMETERS - Incorrect input param + */ +#define TA_NVMEM_WRITE 0x1 + +/* value of TA_NVMEM type = value[in] a */ +#define NVMEM_OTP 0 + DECLARE_GLOBAL_DATA_PTR; +/* OPTEE TA NVMEM open helper */ +static int optee_ta_open(struct stm32prog_data *data) +{ + const struct tee_optee_ta_uuid uuid = TA_NVMEM_UUID; + struct tee_open_session_arg arg; + struct udevice *tee = NULL; + int rc; + + if (data->tee) + return 0; + + tee = tee_find_device(NULL, NULL, NULL, NULL); + if (!tee) + return -ENODEV; + + memset(&arg, 0, sizeof(arg)); + tee_optee_ta_uuid_to_octets(arg.uuid, &uuid); + rc = tee_open_session(tee, &arg, 0, NULL); + if (rc < 0) + return -ENODEV; + + data->tee = tee; + data->tee_session = arg.session; + + return 0; +} + +/* OPTEE TA NVMEM invoke helper */ +static int optee_ta_invoke(struct stm32prog_data *data, int cmd, int type, + void *buff, ulong size) +{ + struct tee_invoke_arg arg; + struct tee_param param[2]; + struct tee_shm *buff_shm; + int rc; + + rc = tee_shm_register(data->tee, buff, size, 0, &buff_shm); + if (rc) + return rc; + + memset(&arg, 0, sizeof(arg)); + arg.func = cmd; + arg.session = data->tee_session; + + memset(param, 0, sizeof(param)); + param[0].attr = TEE_PARAM_ATTR_TYPE_VALUE_INPUT; + param[0].u.value.a = type; + + if (cmd == TA_NVMEM_WRITE) + param[1].attr = TEE_PARAM_ATTR_TYPE_MEMREF_INPUT; + else + param[1].attr = TEE_PARAM_ATTR_TYPE_MEMREF_OUTPUT; + + param[1].u.memref.shm = buff_shm; + param[1].u.memref.size = size; + + rc = tee_invoke_func(data->tee, &arg, 2, param); + if (rc < 0 || arg.ret != 0) { + dev_err(data->tee, + "TA_NVMEM invoke failed TEE err: %x, err:%x\n", + arg.ret, rc); + if (!rc) + rc = -EIO; + } + + tee_shm_free(buff_shm); + + return rc; +} + /* partition handling routines : CONFIG_CMD_MTDPARTS */ int mtdparts_init(void); int find_dev_and_part(const char *id, struct mtd_device **dev, @@ -1208,7 +1312,11 @@ static int dfu_init_entities(struct stm32prog_data *data) ret = stm32prog_alt_add_virt(dfu, "virtual", PHASE_CMD, CMD_SIZE); if (!ret && IS_ENABLED(CONFIG_CMD_STM32PROG_OTP)) { - ret = stm32prog_alt_add_virt(dfu, "OTP", PHASE_OTP, OTP_SIZE); + ret = optee_ta_open(data); + log_debug("optee_ta result %d\n", ret); + ret = stm32prog_alt_add_virt(dfu, "OTP", PHASE_OTP, + data->tee ? OTP_SIZE_TA : OTP_SIZE_SMC); + } if (!ret && CONFIG_IS_ENABLED(DM_PMIC)) ret = stm32prog_alt_add_virt(dfu, "PMIC", PHASE_PMIC, PMIC_SIZE); @@ -1226,6 +1334,7 @@ static int dfu_init_entities(struct stm32prog_data *data) int stm32prog_otp_write(struct stm32prog_data *data, u32 offset, u8 *buffer, long *size) { + u32 otp_size = data->tee ? OTP_SIZE_TA : OTP_SIZE_SMC; log_debug("%s: %x %lx\n", __func__, offset, *size); if (!IS_ENABLED(CONFIG_CMD_STM32PROG_OTP)) { @@ -1233,17 +1342,18 @@ int stm32prog_otp_write(struct stm32prog_data *data, u32 offset, u8 *buffer, return -EOPNOTSUPP; } + if (!data->otp_part) { - data->otp_part = memalign(CONFIG_SYS_CACHELINE_SIZE, OTP_SIZE); + data->otp_part = memalign(CONFIG_SYS_CACHELINE_SIZE, otp_size); if (!data->otp_part) return -ENOMEM; } if (!offset) - memset(data->otp_part, 0, OTP_SIZE); + memset(data->otp_part, 0, otp_size); - if (offset + *size > OTP_SIZE) - *size = OTP_SIZE - offset; + if (offset + *size > otp_size) + *size = otp_size - offset; memcpy((void *)((u32)data->otp_part + offset), buffer, *size); @@ -1253,6 +1363,7 @@ int stm32prog_otp_write(struct stm32prog_data *data, u32 offset, u8 *buffer, int stm32prog_otp_read(struct stm32prog_data *data, u32 offset, u8 *buffer, long *size) { + u32 otp_size = data->tee ? OTP_SIZE_TA : OTP_SIZE_SMC; int result = 0; if (!IS_ENABLED(CONFIG_CMD_STM32PROG_OTP)) { @@ -1266,7 +1377,7 @@ int stm32prog_otp_read(struct stm32prog_data *data, u32 offset, u8 *buffer, if (!offset) { if (!data->otp_part) data->otp_part = - memalign(CONFIG_SYS_CACHELINE_SIZE, OTP_SIZE); + memalign(CONFIG_SYS_CACHELINE_SIZE, otp_size); if (!data->otp_part) { result = -ENOMEM; @@ -1274,11 +1385,14 @@ int stm32prog_otp_read(struct stm32prog_data *data, u32 offset, u8 *buffer, } /* init struct with 0 */ - memset(data->otp_part, 0, OTP_SIZE); + memset(data->otp_part, 0, otp_size); /* call the service */ result = -EOPNOTSUPP; - if (IS_ENABLED(CONFIG_ARM_SMCCC)) + if (data->tee && CONFIG_IS_ENABLED(OPTEE)) + result = optee_ta_invoke(data, TA_NVMEM_READ, NVMEM_OTP, + data->otp_part, OTP_SIZE_TA); + else if (IS_ENABLED(CONFIG_ARM_SMCCC)) result = stm32_smc_exec(STM32_SMC_BSEC, STM32_SMC_READ_ALL, (u32)data->otp_part, 0); if (result) @@ -1290,8 +1404,8 @@ int stm32prog_otp_read(struct stm32prog_data *data, u32 offset, u8 *buffer, goto end_otp_read; } - if (offset + *size > OTP_SIZE) - *size = OTP_SIZE - offset; + if (offset + *size > otp_size) + *size = otp_size - offset; memcpy(buffer, (void *)((u32)data->otp_part + offset), *size); end_otp_read: @@ -1317,7 +1431,10 @@ int stm32prog_otp_start(struct stm32prog_data *data) } result = -EOPNOTSUPP; - if (IS_ENABLED(CONFIG_ARM_SMCCC)) { + if (data->tee && CONFIG_IS_ENABLED(OPTEE)) { + result = optee_ta_invoke(data, TA_NVMEM_WRITE, NVMEM_OTP, + data->otp_part, OTP_SIZE_TA); + } else if (IS_ENABLED(CONFIG_ARM_SMCCC)) { arm_smccc_smc(STM32_SMC_BSEC, STM32_SMC_WRITE_ALL, (u32)data->otp_part, 0, 0, 0, 0, 0, &res); @@ -1751,6 +1868,12 @@ void stm32prog_clean(struct stm32prog_data *data) free(data->part_array); free(data->otp_part); free(data->buffer); + + if (CONFIG_IS_ENABLED(OPTEE) && data->tee) { + tee_close_session(data->tee, data->tee_session); + data->tee = NULL; + data->tee_session = 0x0; + } } /* DFU callback: used after serial and direct DFU USB access */ diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h index 240c5c44bc..928b7b3a0e 100644 --- a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h +++ b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h @@ -20,7 +20,8 @@ #define DEFAULT_ADDRESS 0xFFFFFFFF #define CMD_SIZE 512 -#define OTP_SIZE 1024 +#define OTP_SIZE_SMC 1024 +#define OTP_SIZE_TA 776 #define PMIC_SIZE 8 enum stm32prog_target { @@ -147,6 +148,10 @@ struct stm32prog_data { u32 dtb; u32 initrd; u32 initrd_size; + + /* OPTEE PTA NVMEM */ + struct udevice *tee; + u32 tee_session; }; extern struct stm32prog_data *stm32prog_data; diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_usb.c b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_usb.c index e8acc302f9..82b702f93b 100644 --- a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_usb.c +++ b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog_usb.c @@ -181,7 +181,7 @@ int stm32prog_get_medium_size_virt(struct dfu_entity *dfu, u64 *size) *size = CMD_SIZE; break; case PHASE_OTP: - *size = OTP_SIZE; + *size = stm32prog_data->tee ? OTP_SIZE_TA : OTP_SIZE_SMC; break; case PHASE_PMIC: *size = PMIC_SIZE; -- 2.39.5