From 98b9028ea5f6fa7e717b772488411acfeadb9d71 Mon Sep 17 00:00:00 2001 From: Petr Machata Date: Sun, 30 Jun 2019 09:04:47 +0300 Subject: [PATCH] mlxsw: reg: Add Time Precision Packet Timestamping Reading The MTPPTR is used for reading the per port PTP timestamp FIFO. Signed-off-by: Petr Machata Acked-by: Jiri Pirko Signed-off-by: Ido Schimmel Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlxsw/reg.h | 110 ++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h index 5c5f63289468..197599890bdf 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/reg.h +++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h @@ -9185,6 +9185,115 @@ static inline void mlxsw_reg_mtpppc_pack(char *payload, u16 ing, u16 egr) mlxsw_reg_mtpppc_egr_timestamp_message_type_set(payload, egr); } +/* MTPPTR - Time Precision Packet Timestamping Reading + * --------------------------------------------------- + * The MTPPTR is used for reading the per port PTP timestamp FIFO. + * There is a trap for packets which are latched to the timestamp FIFO, thus the + * SW knows which FIFO to read. Note that packets enter the FIFO before been + * trapped. The sequence number is used to synchronize the timestamp FIFO + * entries and the trapped packets. + * Reserved when Spectrum-2. + */ + +#define MLXSW_REG_MTPPTR_ID 0x9091 +#define MLXSW_REG_MTPPTR_BASE_LEN 0x10 /* base length, without records */ +#define MLXSW_REG_MTPPTR_REC_LEN 0x10 /* record length */ +#define MLXSW_REG_MTPPTR_REC_MAX_COUNT 4 +#define MLXSW_REG_MTPPTR_LEN (MLXSW_REG_MTPPTR_BASE_LEN + \ + MLXSW_REG_MTPPTR_REC_LEN * MLXSW_REG_MTPPTR_REC_MAX_COUNT) + +MLXSW_REG_DEFINE(mtpptr, MLXSW_REG_MTPPTR_ID, MLXSW_REG_MTPPTR_LEN); + +/* reg_mtpptr_local_port + * Not supported for CPU port. + * Access: Index + */ +MLXSW_ITEM32(reg, mtpptr, local_port, 0x00, 16, 8); + +enum mlxsw_reg_mtpptr_dir { + MLXSW_REG_MTPPTR_DIR_INGRESS, + MLXSW_REG_MTPPTR_DIR_EGRESS, +}; + +/* reg_mtpptr_dir + * Direction. + * Access: Index + */ +MLXSW_ITEM32(reg, mtpptr, dir, 0x00, 0, 1); + +/* reg_mtpptr_clr + * Clear the records. + * Access: OP + */ +MLXSW_ITEM32(reg, mtpptr, clr, 0x04, 31, 1); + +/* reg_mtpptr_num_rec + * Number of valid records in the response + * Range 0.. cap_ptp_timestamp_fifo + * Access: RO + */ +MLXSW_ITEM32(reg, mtpptr, num_rec, 0x08, 0, 4); + +/* reg_mtpptr_rec_message_type + * MessageType field as defined by IEEE 1588 Each bit corresponds to a value + * (e.g. Bit0: Sync, Bit1: Delay_Req) + * Access: RO + */ +MLXSW_ITEM32_INDEXED(reg, mtpptr, rec_message_type, + MLXSW_REG_MTPPTR_BASE_LEN, 8, 4, + MLXSW_REG_MTPPTR_REC_LEN, 0, false); + +/* reg_mtpptr_rec_domain_number + * DomainNumber field as defined by IEEE 1588 + * Access: RO + */ +MLXSW_ITEM32_INDEXED(reg, mtpptr, rec_domain_number, + MLXSW_REG_MTPPTR_BASE_LEN, 0, 8, + MLXSW_REG_MTPPTR_REC_LEN, 0, false); + +/* reg_mtpptr_rec_sequence_id + * SequenceId field as defined by IEEE 1588 + * Access: RO + */ +MLXSW_ITEM32_INDEXED(reg, mtpptr, rec_sequence_id, + MLXSW_REG_MTPPTR_BASE_LEN, 0, 16, + MLXSW_REG_MTPPTR_REC_LEN, 0x4, false); + +/* reg_mtpptr_rec_timestamp_high + * Timestamp of when the PTP packet has passed through the port Units of PLL + * clock time. + * For Spectrum-1 the PLL clock is 156.25Mhz and PLL clock time is 6.4nSec. + * Access: RO + */ +MLXSW_ITEM32_INDEXED(reg, mtpptr, rec_timestamp_high, + MLXSW_REG_MTPPTR_BASE_LEN, 0, 32, + MLXSW_REG_MTPPTR_REC_LEN, 0x8, false); + +/* reg_mtpptr_rec_timestamp_low + * See rec_timestamp_high. + * Access: RO + */ +MLXSW_ITEM32_INDEXED(reg, mtpptr, rec_timestamp_low, + MLXSW_REG_MTPPTR_BASE_LEN, 0, 32, + MLXSW_REG_MTPPTR_REC_LEN, 0xC, false); + +static inline void mlxsw_reg_mtpptr_unpack(const char *payload, + unsigned int rec, + u8 *p_message_type, + u8 *p_domain_number, + u16 *p_sequence_id, + u64 *p_timestamp) +{ + u32 timestamp_high, timestamp_low; + + *p_message_type = mlxsw_reg_mtpptr_rec_message_type_get(payload, rec); + *p_domain_number = mlxsw_reg_mtpptr_rec_domain_number_get(payload, rec); + *p_sequence_id = mlxsw_reg_mtpptr_rec_sequence_id_get(payload, rec); + timestamp_high = mlxsw_reg_mtpptr_rec_timestamp_high_get(payload, rec); + timestamp_low = mlxsw_reg_mtpptr_rec_timestamp_low_get(payload, rec); + *p_timestamp = (u64)timestamp_high << 32 | timestamp_low; +} + /* MTPTPT - Monitoring Precision Time Protocol Trap Register * --------------------------------------------------------- * This register is used for configuring under which trap to deliver PTP @@ -10292,6 +10401,7 @@ static const struct mlxsw_reg_info *mlxsw_reg_infos[] = { MLXSW_REG(mgpc), MLXSW_REG(mprs), MLXSW_REG(mtpppc), + MLXSW_REG(mtpptr), MLXSW_REG(mtptpt), MLXSW_REG(mgpir), MLXSW_REG(tngcr), -- 2.11.0