[PATCH 3/8] stm32mp: stm32prog: add TEE support in stm32prog command
Patrick Delaunay
patrick.delaunay at foss.st.com
Mon Mar 28 19:25:28 CEST 2022
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 <patrick.delaunay at foss.st.com>
---
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 <misc.h>
#include <mmc.h>
#include <part.h>
+#include <tee.h>
#include <asm/arch/stm32mp1_smc.h>
#include <asm/global_data.h>
+#include <dm/device_compat.h>
#include <dm/uclass.h>
#include <jffs2/load_kernel.h>
#include <linux/list.h>
@@ -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;
--
2.25.1
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