Merge branch 'mlxsw-Spectrum-2-PTP-preparations'

Ido Schimmel says:

====================
mlxsw: Spectrum-2 PTP preparations

This patchset includes various preparations required for Spectrum-2 PTP
support.

Most of the changes are non-functional (e.g., renaming, adding
registers). The only intentional user visible change is in patch #10
where the PHC time is initialized to zero in accordance with the
recommendation of the PTP maintainer.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/cmd.h

@@ -329,6 +329,32 @@ MLXSW_ITEM64(cmd_mbox, query_fw, free_running_clock_offset, 0x50, 0, 64);
  */
 MLXSW_ITEM32(cmd_mbox, query_fw, fr_rn_clk_bar, 0x58, 30, 2);
 
+/* cmd_mbox_query_fw_utc_sec_offset
+ * The offset of the UTC_Sec page
+ */
+MLXSW_ITEM64(cmd_mbox, query_fw, utc_sec_offset, 0x70, 0, 64);
+
+/* cmd_mbox_query_fw_utc_sec_bar
+ * PCI base address register (BAR) of the UTC_Sec page
+ * 0: BAR 0
+ * 1: 64 bit BAR
+ * Reserved on SwitchX/-2, Switch-IB/2, Spectrum-1
+ */
+MLXSW_ITEM32(cmd_mbox, query_fw, utc_sec_bar, 0x78, 30, 2);
+
+/* cmd_mbox_query_fw_utc_nsec_offset
+ * The offset of the UTC_nSec page
+ */
+MLXSW_ITEM64(cmd_mbox, query_fw, utc_nsec_offset, 0x80, 0, 64);
+
+/* cmd_mbox_query_fw_utc_nsec_bar
+ * PCI base address register (BAR) of the UTC_nSec page
+ * 0: BAR 0
+ * 1: 64 bit BAR
+ * Reserved on SwitchX/-2, Switch-IB/2, Spectrum-1
+ */
+MLXSW_ITEM32(cmd_mbox, query_fw, utc_nsec_bar, 0x88, 30, 2);
+
 /* QUERY_BOARDINFO - Query Board Information
  * -----------------------------------------
  * OpMod == 0 (N/A), INMmod == 0 (N/A)
@@ -663,6 +689,12 @@ MLXSW_ITEM32(cmd_mbox, config_profile, set_kvd_hash_double_size, 0x0C, 26, 1);
  */
 MLXSW_ITEM32(cmd_mbox, config_profile, set_cqe_version, 0x08, 0, 1);
 
+/* cmd_mbox_config_set_cqe_time_stamp_type
+ * Capability bit. Setting a bit to 1 configures the profile
+ * according to the mailbox contents.
+ */
+MLXSW_ITEM32(cmd_mbox, config_profile, set_cqe_time_stamp_type, 0x08, 2, 1);
+
 /* cmd_mbox_config_profile_max_vepa_channels
  * Maximum number of VEPA channels per port (0 through 16)
  * 0 - multi-channel VEPA is disabled
@@ -858,6 +890,26 @@ MLXSW_ITEM32_INDEXED(cmd_mbox, config_profile, swid_config_type,
 MLXSW_ITEM32_INDEXED(cmd_mbox, config_profile, swid_config_properties,
 		     0x60, 0, 8, 0x08, 0x00, false);
 
+enum mlxsw_cmd_mbox_config_profile_cqe_time_stamp_type {
+	/* uSec - 1.024uSec (default). Only bits 15:0 are valid. */
+	MLXSW_CMD_MBOX_CONFIG_PROFILE_CQE_TIME_STAMP_TYPE_USEC,
+	/* FRC - Free Running Clock, units of 1nSec.
+	 * Reserved when SwitchX/-2, Switch-IB/2 and Spectrum-1.
+	 */
+	MLXSW_CMD_MBOX_CONFIG_PROFILE_CQE_TIME_STAMP_TYPE_FRC,
+	/* UTC. time_stamp[37:30] = Sec, time_stamp[29:0] = nSec.
+	 * Reserved when SwitchX/2, Switch-IB/2 and Spectrum-1.
+	 */
+	MLXSW_CMD_MBOX_CONFIG_PROFILE_CQE_TIME_STAMP_TYPE_UTC,
+};
+
+/* cmd_mbox_config_profile_cqe_time_stamp_type
+ * CQE time_stamp_type for non-mirror-packets.
+ * Configured if set_cqe_time_stamp_type is set.
+ * Reserved when SwitchX/-2, Switch-IB/2 and Spectrum-1.
+ */
+MLXSW_ITEM32(cmd_mbox, config_profile, cqe_time_stamp_type, 0xB0, 8, 2);
+
 /* cmd_mbox_config_profile_cqe_version
  * CQE version:
  * 0: CQE version is 0

drivers/net/ethernet/mellanox/mlxsw/core.h

@@ -296,7 +296,8 @@ struct mlxsw_config_profile {
 		used_ar_sec:1,
 		used_adaptive_routing_group_cap:1,
 		used_ubridge:1,
-		used_kvd_sizes:1;
+		used_kvd_sizes:1,
+		used_cqe_time_stamp_type:1;
 	u8	max_vepa_channels;
 	u16	max_mid;
 	u16	max_pgt;
@@ -319,6 +320,7 @@ struct mlxsw_config_profile {
 	u32	kvd_linear_size;
 	u8	kvd_hash_single_parts;
 	u8	kvd_hash_double_parts;
+	u8	cqe_time_stamp_type;
 	struct mlxsw_swid_config swid_config[MLXSW_CONFIG_PROFILE_SWID_COUNT];
 };
 
@@ -485,7 +487,7 @@ struct mlxsw_bus_info {
 	u8 vsd[MLXSW_CMD_BOARDINFO_VSD_LEN];
 	u8 psid[MLXSW_CMD_BOARDINFO_PSID_LEN];
 	u8 low_frequency:1,
-	   read_frc_capable:1;
+	   read_clock_capable:1;
 };
 
 struct mlxsw_hwmon;

drivers/net/ethernet/mellanox/mlxsw/pci.c

@@ -505,6 +505,12 @@ static void mlxsw_pci_cq_fini(struct mlxsw_pci *mlxsw_pci,
 	mlxsw_cmd_hw2sw_cq(mlxsw_pci->core, q->num);
 }
 
+static unsigned int mlxsw_pci_read32_off(struct mlxsw_pci *mlxsw_pci,
+					 ptrdiff_t off)
+{
+	return ioread32be(mlxsw_pci->hw_addr + off);
+}
+
 static void mlxsw_pci_cqe_sdq_handle(struct mlxsw_pci *mlxsw_pci,
 				     struct mlxsw_pci_queue *q,
 				     u16 consumer_counter_limit,
@@ -1267,6 +1273,13 @@ static int mlxsw_pci_config_profile(struct mlxsw_pci *mlxsw_pci, char *mbox,
 		mlxsw_cmd_mbox_config_profile_cqe_version_set(mbox, 1);
 	}
 
+	if (profile->used_cqe_time_stamp_type) {
+		mlxsw_cmd_mbox_config_profile_set_cqe_time_stamp_type_set(mbox,
+									  1);
+		mlxsw_cmd_mbox_config_profile_cqe_time_stamp_type_set(mbox,
+					profile->cqe_time_stamp_type);
+	}
+
 	return mlxsw_cmd_config_profile_set(mlxsw_pci->core, mbox);
 }
 
@@ -1802,19 +1815,19 @@ static int mlxsw_pci_cmd_exec(void *bus_priv, u16 opcode, u8 opcode_mod,
 static u32 mlxsw_pci_read_frc_h(void *bus_priv)
 {
 	struct mlxsw_pci *mlxsw_pci = bus_priv;
-	u64 frc_offset;
+	u64 frc_offset_h;
 
-	frc_offset = mlxsw_pci->free_running_clock_offset;
-	return mlxsw_pci_read32(mlxsw_pci, FREE_RUNNING_CLOCK_H(frc_offset));
+	frc_offset_h = mlxsw_pci->free_running_clock_offset;
+	return mlxsw_pci_read32_off(mlxsw_pci, frc_offset_h);
 }
 
 static u32 mlxsw_pci_read_frc_l(void *bus_priv)
 {
 	struct mlxsw_pci *mlxsw_pci = bus_priv;
-	u64 frc_offset;
+	u64 frc_offset_l;
 
-	frc_offset = mlxsw_pci->free_running_clock_offset;
-	return mlxsw_pci_read32(mlxsw_pci, FREE_RUNNING_CLOCK_L(frc_offset));
+	frc_offset_l = mlxsw_pci->free_running_clock_offset + 4;
+	return mlxsw_pci_read32_off(mlxsw_pci, frc_offset_l);
 }
 
 static const struct mlxsw_bus mlxsw_pci_bus = {
@@ -1916,7 +1929,7 @@ static int mlxsw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	mlxsw_pci->bus_info.device_kind = driver_name;
 	mlxsw_pci->bus_info.device_name = pci_name(mlxsw_pci->pdev);
 	mlxsw_pci->bus_info.dev = &pdev->dev;
-	mlxsw_pci->bus_info.read_frc_capable = true;
+	mlxsw_pci->bus_info.read_clock_capable = true;
 	mlxsw_pci->id = id;
 
 	err = mlxsw_core_bus_device_register(&mlxsw_pci->bus_info,

drivers/net/ethernet/mellanox/mlxsw/pci_hw.h

@@ -41,9 +41,6 @@
 #define MLXSW_PCI_DOORBELL(offset, type_offset, num)	\
 	((offset) + (type_offset) + (num) * 4)
 
-#define MLXSW_PCI_FREE_RUNNING_CLOCK_H(offset)	(offset)
-#define MLXSW_PCI_FREE_RUNNING_CLOCK_L(offset)	((offset) + 4)
-
 #define MLXSW_PCI_CQS_MAX	96
 #define MLXSW_PCI_EQS_COUNT	2
 #define MLXSW_PCI_EQ_ASYNC_NUM	0
@@ -217,6 +214,25 @@ MLXSW_ITEM32(pci, cqe0, dqn, 0x0C, 1, 5);
 MLXSW_ITEM32(pci, cqe12, dqn, 0x0C, 1, 6);
 mlxsw_pci_cqe_item_helpers(dqn, 0, 12, 12);
 
+/* pci_cqe_time_stamp_low
+ * Time stamp of the CQE
+ * Format according to time_stamp_type:
+ * 0: uSec - 1.024uSec (default for devices which do not support
+ * time_stamp_type). Only bits 15:0 are valid
+ * 1: FRC - Free Running Clock - units of 1nSec
+ * 2: UTC - time_stamp[37:30] = Sec
+ *	  - time_stamp[29:0] = nSec
+ * 3: Mirror_UTC. UTC time stamp of the original packet that has
+ * MIRROR_SESSION traps
+ *   - time_stamp[37:30] = Sec
+ *   - time_stamp[29:0] = nSec
+ *   Formats 0..2 are configured by
+ *   CONFIG_PROFILE.cqe_time_stamp_type for PTP traps
+ *   Format 3 is used for MIRROR_SESSION traps
+ *   Note that Spectrum does not reveal FRC, UTC and Mirror_UTC
+ */
+MLXSW_ITEM32(pci, cqe2, time_stamp_low, 0x0C, 16, 16);
+
 #define MLXSW_PCI_CQE2_MIRROR_TCLASS_INVALID	0x1F
 
 /* pci_cqe_mirror_tclass
@@ -280,8 +296,67 @@ MLXSW_ITEM32(pci, cqe2, user_def_val_orig_pkt_len, 0x14, 0, 20);
  */
 MLXSW_ITEM32(pci, cqe2, mirror_reason, 0x18, 24, 8);
 
+enum mlxsw_pci_cqe_time_stamp_type {
+	MLXSW_PCI_CQE_TIME_STAMP_TYPE_USEC,
+	MLXSW_PCI_CQE_TIME_STAMP_TYPE_FRC,
+	MLXSW_PCI_CQE_TIME_STAMP_TYPE_UTC,
+	MLXSW_PCI_CQE_TIME_STAMP_TYPE_MIRROR_UTC,
+};
+
+/* pci_cqe_time_stamp_type
+ * Time stamp type:
+ * 0: uSec - 1.024uSec (default for devices which do not support
+ * time_stamp_type)
+ * 1: FRC - Free Running Clock - units of 1nSec
+ * 2: UTC
+ * 3: Mirror_UTC. UTC time stamp of the original packet that has
+ * MIRROR_SESSION traps
+ */
+MLXSW_ITEM32(pci, cqe2, time_stamp_type, 0x18, 22, 2);
+
 #define MLXSW_PCI_CQE2_MIRROR_LATENCY_INVALID	0xFFFFFF
 
+/* pci_cqe_time_stamp_high
+ * Time stamp of the CQE
+ * Format according to time_stamp_type:
+ * 0: uSec - 1.024uSec (default for devices which do not support
+ * time_stamp_type). Only bits 15:0 are valid
+ * 1: FRC - Free Running Clock - units of 1nSec
+ * 2: UTC - time_stamp[37:30] = Sec
+ *	  - time_stamp[29:0] = nSec
+ * 3: Mirror_UTC. UTC time stamp of the original packet that has
+ * MIRROR_SESSION traps
+ *   - time_stamp[37:30] = Sec
+ *   - time_stamp[29:0] = nSec
+ *   Formats 0..2 are configured by
+ *   CONFIG_PROFILE.cqe_time_stamp_type for PTP traps
+ *   Format 3 is used for MIRROR_SESSION traps
+ *   Note that Spectrum does not reveal FRC, UTC and Mirror_UTC
+ */
+MLXSW_ITEM32(pci, cqe2, time_stamp_high, 0x18, 0, 22);
+
+static inline u64 mlxsw_pci_cqe2_time_stamp_get(const char *cqe)
+{
+	u64 ts_high = mlxsw_pci_cqe2_time_stamp_high_get(cqe);
+	u64 ts_low = mlxsw_pci_cqe2_time_stamp_low_get(cqe);
+
+	return ts_high << 16 | ts_low;
+}
+
+static inline u8 mlxsw_pci_cqe2_time_stamp_sec_get(const char *cqe)
+{
+	u64 full_ts = mlxsw_pci_cqe2_time_stamp_get(cqe);
+
+	return full_ts >> 30 & 0xFF;
+}
+
+static inline u32 mlxsw_pci_cqe2_time_stamp_nsec_get(const char *cqe)
+{
+	u64 full_ts = mlxsw_pci_cqe2_time_stamp_get(cqe);
+
+	return full_ts & 0x3FFFFFFF;
+}
+
 /* pci_cqe_mirror_latency
  * End-to-end latency of the original packet that does mirroring to the CPU.
  * Value of 0xFFFFFF means that the latency is invalid. Units are according to

drivers/net/ethernet/mellanox/mlxsw/reg.h

@@ -10347,6 +10347,8 @@ MLXSW_REG_DEFINE(mtutc, MLXSW_REG_MTUTC_ID, MLXSW_REG_MTUTC_LEN);
 
 enum mlxsw_reg_mtutc_operation {
 	MLXSW_REG_MTUTC_OPERATION_SET_TIME_AT_NEXT_SEC = 0,
+	MLXSW_REG_MTUTC_OPERATION_SET_TIME_IMMEDIATE = 1,
+	MLXSW_REG_MTUTC_OPERATION_ADJUST_TIME = 2,
 	MLXSW_REG_MTUTC_OPERATION_ADJUST_FREQ = 3,
 };
 
@@ -10359,25 +10361,50 @@ MLXSW_ITEM32(reg, mtutc, operation, 0x00, 0, 4);
 /* reg_mtutc_freq_adjustment
  * Frequency adjustment: Every PPS the HW frequency will be
  * adjusted by this value. Units of HW clock, where HW counts
- * 10^9 HW clocks for 1 HW second.
+ * 10^9 HW clocks for 1 HW second. Range is from -50,000,000 to +50,000,000.
+ * In Spectrum-2, the field is reversed, positive values mean to decrease the
+ * frequency.
  * Access: RW
  */
 MLXSW_ITEM32(reg, mtutc, freq_adjustment, 0x04, 0, 32);
 
+#define MLXSW_REG_MTUTC_MAX_FREQ_ADJ (50 * 1000 * 1000)
+
 /* reg_mtutc_utc_sec
  * UTC seconds.
  * Access: WO
  */
 MLXSW_ITEM32(reg, mtutc, utc_sec, 0x10, 0, 32);
 
+/* reg_mtutc_utc_nsec
+ * UTC nSecs.
+ * Range 0..(10^9-1)
+ * Updated when operation is SET_TIME_IMMEDIATE.
+ * Reserved on Spectrum-1.
+ * Access: WO
+ */
+MLXSW_ITEM32(reg, mtutc, utc_nsec, 0x14, 0, 30);
+
+/* reg_mtutc_time_adjustment
+ * Time adjustment.
+ * Units of nSec.
+ * Range is from -32768 to +32767.
+ * Updated when operation is ADJUST_TIME.
+ * Reserved on Spectrum-1.
+ * Access: WO
+ */
+MLXSW_ITEM32(reg, mtutc, time_adjustment, 0x18, 0, 32);
+
 static inline void
 mlxsw_reg_mtutc_pack(char *payload, enum mlxsw_reg_mtutc_operation oper,
-		     u32 freq_adj, u32 utc_sec)
+		     u32 freq_adj, u32 utc_sec, u32 utc_nsec, u32 time_adj)
 {
 	MLXSW_REG_ZERO(mtutc, payload);
 	mlxsw_reg_mtutc_operation_set(payload, oper);
 	mlxsw_reg_mtutc_freq_adjustment_set(payload, freq_adj);
 	mlxsw_reg_mtutc_utc_sec_set(payload, utc_sec);
+	mlxsw_reg_mtutc_utc_nsec_set(payload, utc_nsec);
+	mlxsw_reg_mtutc_time_adjustment_set(payload, time_adj);
 }
 
 /* MCQI - Management Component Query Information
@@ -11045,7 +11072,7 @@ MLXSW_ITEM32(reg, mtptpt, trap_id, 0x00, 0, 4);
  */
 MLXSW_ITEM32(reg, mtptpt, message_type, 0x04, 0, 16);
 
-static inline void mlxsw_reg_mtptptp_pack(char *payload,
+static inline void mlxsw_reg_mtptpt_pack(char *payload,
 					 enum mlxsw_reg_mtptpt_trap_id trap_id,
 					 u16 message_type)
 {
@@ -11054,6 +11081,67 @@ static inline void mlxsw_reg_mtptptp_pack(char *payload,
 	mlxsw_reg_mtptpt_message_type_set(payload, message_type);
 }
 
+/* MTPCPC - Monitoring Time Precision Correction Port Configuration Register
+ * -------------------------------------------------------------------------
+ */
+#define MLXSW_REG_MTPCPC_ID 0x9093
+#define MLXSW_REG_MTPCPC_LEN 0x2C
+
+MLXSW_REG_DEFINE(mtpcpc, MLXSW_REG_MTPCPC_ID, MLXSW_REG_MTPCPC_LEN);
+
+/* reg_mtpcpc_pport
+ * Per port:
+ * 0: config is global. When reading - the local_port is 1.
+ * 1: config is per port.
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, mtpcpc, pport, 0x00, 31, 1);
+
+/* reg_mtpcpc_local_port
+ * Local port number.
+ * Supported to/from CPU port.
+ * Reserved when pport = 0.
+ * Access: Index
+ */
+MLXSW_ITEM32_LP(reg, mtpcpc, 0x00, 16, 0x00, 12);
+
+/* reg_mtpcpc_ptp_trap_en
+ * Enable PTP traps.
+ * The trap_id is configured by MTPTPT.
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, mtpcpc, ptp_trap_en, 0x04, 0, 1);
+
+/* reg_mtpcpc_ing_correction_message_type
+ * Bitwise vector of PTP message types to update correction-field at ingress.
+ * MessageType field as defined by IEEE 1588 Each bit corresponds to a value
+ * (e.g. Bit0: Sync, Bit1: Delay_Req). Supported also from CPU port.
+ * Default all 0
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, mtpcpc, ing_correction_message_type, 0x10, 0, 16);
+
+/* reg_mtpcpc_egr_correction_message_type
+ * Bitwise vector of PTP message types to update correction-field at egress.
+ * MessageType field as defined by IEEE 1588 Each bit corresponds to a value
+ * (e.g. Bit0: Sync, Bit1: Delay_Req). Supported also from CPU port.
+ * Default all 0
+ * Access: RW
+ */
+MLXSW_ITEM32(reg, mtpcpc, egr_correction_message_type, 0x14, 0, 16);
+
+static inline void mlxsw_reg_mtpcpc_pack(char *payload, bool pport,
+					 u16 local_port, bool ptp_trap_en,
+					 u16 ing, u16 egr)
+{
+	MLXSW_REG_ZERO(mtpcpc, payload);
+	mlxsw_reg_mtpcpc_pport_set(payload, pport);
+	mlxsw_reg_mtpcpc_local_port_set(payload, pport ? local_port : 0);
+	mlxsw_reg_mtpcpc_ptp_trap_en_set(payload, ptp_trap_en);
+	mlxsw_reg_mtpcpc_ing_correction_message_type_set(payload, ing);
+	mlxsw_reg_mtpcpc_egr_correction_message_type_set(payload, egr);
+}
+
 /* MFGD - Monitoring FW General Debug Register
  * -------------------------------------------
  */
@@ -12770,6 +12858,7 @@ static const struct mlxsw_reg_info *mlxsw_reg_infos[] = {
 	MLXSW_REG(mtpppc),
 	MLXSW_REG(mtpptr),
 	MLXSW_REG(mtptpt),
+	MLXSW_REG(mtpcpc),
 	MLXSW_REG(mfgd),
 	MLXSW_REG(mgpir),
 	MLXSW_REG(mbct),

drivers/net/ethernet/mellanox/mlxsw/resources.h

@@ -24,6 +24,7 @@ enum mlxsw_res_id {
 	MLXSW_RES_ID_COUNTER_SIZE_PACKETS_BYTES,
 	MLXSW_RES_ID_COUNTER_SIZE_ROUTER_BASIC,
 	MLXSW_RES_ID_MAX_SYSTEM_PORT,
+	MLXSW_RES_ID_FID,
 	MLXSW_RES_ID_MAX_LAG,
 	MLXSW_RES_ID_MAX_LAG_MEMBERS,
 	MLXSW_RES_ID_GUARANTEED_SHARED_BUFFER,
@@ -83,6 +84,7 @@ static u16 mlxsw_res_ids[] = {
 	[MLXSW_RES_ID_COUNTER_SIZE_PACKETS_BYTES] = 0x2443,
 	[MLXSW_RES_ID_COUNTER_SIZE_ROUTER_BASIC] = 0x2449,
 	[MLXSW_RES_ID_MAX_SYSTEM_PORT] = 0x2502,
+	[MLXSW_RES_ID_FID] = 0x2512,
 	[MLXSW_RES_ID_MAX_LAG] = 0x2520,
 	[MLXSW_RES_ID_MAX_LAG_MEMBERS] = 0x2521,
 	[MLXSW_RES_ID_GUARANTEED_SHARED_BUFFER] = 0x2805,	/* Bytes */

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -166,7 +166,7 @@ MLXSW_ITEM32(tx, hdr, port_mid, 0x04, 16, 16);
  * set, otherwise calculated based on the packet's VID using VID to FID mapping.
  * Valid for data packets only.
  */
-MLXSW_ITEM32(tx, hdr, fid, 0x08, 0, 16);
+MLXSW_ITEM32(tx, hdr, fid, 0x08, 16, 16);
 
 /* tx_hdr_type
  * 0 - Data packets
@@ -3096,7 +3096,7 @@ static int mlxsw_sp_init(struct mlxsw_core *mlxsw_core,
 		goto err_router_init;
 	}
 
-	if (mlxsw_sp->bus_info->read_frc_capable) {
+	if (mlxsw_sp->bus_info->read_clock_capable) {
 		/* NULL is a valid return value from clock_init */
 		mlxsw_sp->clock =
 			mlxsw_sp->ptp_ops->clock_init(mlxsw_sp,
@@ -3411,6 +3411,8 @@ static const struct mlxsw_config_profile mlxsw_sp2_config_profile = {
 			.type		= MLXSW_PORT_SWID_TYPE_ETH,
 		}
 	},
+	.used_cqe_time_stamp_type	= 1,
+	.cqe_time_stamp_type		= MLXSW_CMD_MBOX_CONFIG_PROFILE_CQE_TIME_STAMP_TYPE_UTC,
 };
 
 static void