diff options
| -rw-r--r-- | hw/ipmi/ipmi_bmc_sim.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/hw/ipmi/ipmi_bmc_sim.c b/hw/ipmi/ipmi_bmc_sim.c index 0b97e04774..f78e92d3d5 100644 --- a/hw/ipmi/ipmi_bmc_sim.c +++ b/hw/ipmi/ipmi_bmc_sim.c @@ -49,6 +49,7 @@ #define IPMI_CMD_GET_SENSOR_READING 0x2d #define IPMI_CMD_SET_SENSOR_TYPE 0x2e #define IPMI_CMD_GET_SENSOR_TYPE 0x2f +#define IPMI_CMD_SET_SENSOR_READING 0x30 /* #define IPMI_NETFN_APP 0x06 In ipmi.h */ @@ -1747,6 +1748,227 @@ static void get_sensor_type(IPMIBmcSim *ibs, rsp_buffer_push(rsp, sens->evt_reading_type_code); } +/* + * bytes parameter + * 1 sensor number + * 2 operation (see below for bits meaning) + * 3 sensor reading + * 4:5 assertion states (optional) + * 6:7 deassertion states (optional) + * 8:10 event data 1,2,3 (optional) + */ +static void set_sensor_reading(IPMIBmcSim *ibs, + uint8_t *cmd, unsigned int cmd_len, + RspBuffer *rsp) +{ + IPMISensor *sens; + uint8_t evd1 = 0; + uint8_t evd2 = 0; + uint8_t evd3 = 0; + uint8_t new_reading = 0; + uint16_t new_assert_states = 0; + uint16_t new_deassert_states = 0; + bool change_reading = false; + bool change_assert = false; + bool change_deassert = false; + enum { + SENSOR_GEN_EVENT_NONE, + SENSOR_GEN_EVENT_DATA, + SENSOR_GEN_EVENT_BMC, + } do_gen_event = SENSOR_GEN_EVENT_NONE; + + if ((cmd[2] >= MAX_SENSORS) || + !IPMI_SENSOR_GET_PRESENT(ibs->sensors + cmd[2])) { + rsp_buffer_set_error(rsp, IPMI_CC_REQ_ENTRY_NOT_PRESENT); + return; + } + + sens = ibs->sensors + cmd[2]; + + /* [1:0] Sensor Reading operation */ + switch ((cmd[3]) & 0x3) { + case 0: /* Do not change */ + break; + case 1: /* write given value to sensor reading byte */ + new_reading = cmd[4]; + if (sens->reading != new_reading) { + change_reading = true; + } + break; + case 2: + case 3: + rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD); + return; + } + + /* [3:2] Deassertion bits operation */ + switch ((cmd[3] >> 2) & 0x3) { + case 0: /* Do not change */ + break; + case 1: /* write given value */ + if (cmd_len > 7) { + new_deassert_states = cmd[7]; + change_deassert = true; + } + if (cmd_len > 8) { + new_deassert_states |= (cmd[8] << 8); + } + break; + + case 2: /* mask on */ + if (cmd_len > 7) { + new_deassert_states = (sens->deassert_states | cmd[7]); + change_deassert = true; + } + if (cmd_len > 8) { + new_deassert_states |= (sens->deassert_states | (cmd[8] << 8)); + } + break; + + case 3: /* mask off */ + if (cmd_len > 7) { + new_deassert_states = (sens->deassert_states & cmd[7]); + change_deassert = true; + } + if (cmd_len > 8) { + new_deassert_states |= (sens->deassert_states & (cmd[8] << 8)); + } + break; + } + + if (change_deassert && (new_deassert_states == sens->deassert_states)) { + change_deassert = false; + } + + /* [5:4] Assertion bits operation */ + switch ((cmd[3] >> 4) & 0x3) { + case 0: /* Do not change */ + break; + case 1: /* write given value */ + if (cmd_len > 5) { + new_assert_states = cmd[5]; + change_assert = true; + } + if (cmd_len > 6) { + new_assert_states |= (cmd[6] << 8); + } + break; + + case 2: /* mask on */ + if (cmd_len > 5) { + new_assert_states = (sens->assert_states | cmd[5]); + change_assert = true; + } + if (cmd_len > 6) { + new_assert_states |= (sens->assert_states | (cmd[6] << 8)); + } + break; + + case 3: /* mask off */ + if (cmd_len > 5) { + new_assert_states = (sens->assert_states & cmd[5]); + change_assert = true; + } + if (cmd_len > 6) { + new_assert_states |= (sens->assert_states & (cmd[6] << 8)); + } + break; + } + + if (change_assert && (new_assert_states == sens->assert_states)) { + change_assert = false; + } + + if (cmd_len > 9) { + evd1 = cmd[9]; + } + if (cmd_len > 10) { + evd2 = cmd[10]; + } + if (cmd_len > 11) { + evd3 = cmd[11]; + } + + /* [7:6] Event Data Bytes operation */ + switch ((cmd[3] >> 6) & 0x3) { + case 0: /* + * Don’t use Event Data bytes from this command. BMC will + * generate it's own Event Data bytes based on its sensor + * implementation. + */ + evd1 = evd2 = evd3 = 0x0; + do_gen_event = SENSOR_GEN_EVENT_BMC; + break; + case 1: /* + * Write given values to event data bytes including bits + * [3:0] Event Data 1. + */ + do_gen_event = SENSOR_GEN_EVENT_DATA; + break; + case 2: /* + * Write given values to event data bytes excluding bits + * [3:0] Event Data 1. + */ + evd1 &= 0xf0; + do_gen_event = SENSOR_GEN_EVENT_DATA; + break; + case 3: + rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD); + return; + } + + /* + * Event Data Bytes operation and parameter are inconsistent. The + * Specs are not clear on that topic but generating an error seems + * correct. + */ + if (do_gen_event == SENSOR_GEN_EVENT_DATA && cmd_len < 10) { + rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD); + return; + } + + /* commit values */ + if (change_reading) { + sens->reading = new_reading; + } + + if (change_assert) { + sens->assert_states = new_assert_states; + } + + if (change_deassert) { + sens->deassert_states = new_deassert_states; + } + + /* TODO: handle threshold sensor */ + if (!IPMI_SENSOR_IS_DISCRETE(sens)) { + return; + } + + switch (do_gen_event) { + case SENSOR_GEN_EVENT_DATA: { + unsigned int bit = evd1 & 0xf; + uint16_t mask = (1 << bit); + + if (sens->assert_states & mask & sens->assert_enable) { + gen_event(ibs, cmd[2], 0, evd1, evd2, evd3); + } + + if (sens->deassert_states & mask & sens->deassert_enable) { + gen_event(ibs, cmd[2], 1, evd1, evd2, evd3); + } + break; + } + case SENSOR_GEN_EVENT_BMC: + /* + * TODO: generate event and event data bytes depending on the + * sensor + */ + break; + case SENSOR_GEN_EVENT_NONE: + break; + } +} static const IPMICmdHandler chassis_cmds[] = { [IPMI_CMD_GET_CHASSIS_CAPABILITIES] = { chassis_capabilities }, @@ -1768,6 +1990,7 @@ static const IPMICmdHandler sensor_event_cmds[] = { [IPMI_CMD_GET_SENSOR_READING] = { get_sensor_reading, 3 }, [IPMI_CMD_SET_SENSOR_TYPE] = { set_sensor_type, 5 }, [IPMI_CMD_GET_SENSOR_TYPE] = { get_sensor_type, 3 }, + [IPMI_CMD_SET_SENSOR_READING] = { set_sensor_reading, 5 }, }; static const IPMINetfn sensor_event_netfn = { .cmd_nums = ARRAY_SIZE(sensor_event_cmds), |