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feat(core): Measure Optiga response timeout in ms not number of attempts.

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This commit is contained in:
Andrew Kozlik 2024-04-30 11:08:23 +02:00 committed by Andrew Kozlik
parent 594d7425cd
commit d453dac45c
1 changed files with 8 additions and 6 deletions
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14
core/embed/trezorhal/optiga/optiga_transport.c
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@ -65,8 +65,8 @@ static const uint16_t OPTIGA_ADDRESS = (BASE_ADDR << 1);
static const uint32_t I2C_TIMEOUT = 15;
static const int I2C_MAX_RETRY_COUNT = 10;
// Maximum number of times to retry reading Optiga's response to a command.
static const int MAX_RETRY_READ = 10000;
// Maximum time in millisecods to retry reading Optiga's response to a command.
static const int MAX_RETRY_READ_MS = 300;
// Maximum number of times to retry reading Optiga's response to a command when
// it claims it's not busy executing a command.
@ -274,7 +274,8 @@ static optiga_result optiga_check_ack(void) {
static optiga_result optiga_ensure_ready(void) {
optiga_result ret = OPTIGA_SUCCESS;
for (int i = 0; i < MAX_RESPONSE_PACKET_COUNT; ++i) {
for (int j = 0; j < MAX_RETRY_READ; ++j) {
uint32_t deadline = hal_ticks_ms() + MAX_RETRY_READ_MS;
do {
ret = optiga_i2c_write(&REG_I2C_STATE, 1);
if (OPTIGA_SUCCESS != ret) {
return ret;
@ -295,7 +296,7 @@ static optiga_result optiga_ensure_ready(void) {
return OPTIGA_SUCCESS;
}
ret = OPTIGA_ERR_BUSY;
}
} while (hal_ticks_ms() < deadline);
if (ret != OPTIGA_SUCCESS) {
// Optiga is busy even after maximum retries at reading the I2C state.
@ -379,7 +380,8 @@ static optiga_result optiga_read(void) {
// it claimed it's not busy executing a command.
int not_busy_count = 0;
for (int i = 0; i < MAX_RETRY_READ; ++i) {
uint32_t deadline = hal_ticks_ms() + MAX_RETRY_READ_MS;
do {
optiga_result ret = optiga_i2c_write(&REG_I2C_STATE, 1);
if (OPTIGA_SUCCESS != ret) {
return ret;
@ -425,7 +427,7 @@ static optiga_result optiga_read(void) {
}
not_busy_count += 1;
}
}
} while (hal_ticks_ms() < deadline);
return OPTIGA_ERR_TIMEOUT;
}