diff options
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h new file mode 100644 index 000000000000..8cc2fae47644 --- /dev/null +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h @@ -0,0 +1,201 @@ +/* Broadcom NetXtreme-C/E network driver. + * + * Copyright (c) 2021 Broadcom Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation. + */ + +#ifndef BNXT_PTP_H +#define BNXT_PTP_H + +#include <linux/ptp_clock_kernel.h> +#include <linux/timecounter.h> + +#define BNXT_PTP_GRC_WIN 6 +#define BNXT_PTP_GRC_WIN_BASE 0x6000 + +#define BNXT_MAX_PHC_DRIFT 31000000 +#define BNXT_CYCLES_SHIFT 23 +#define BNXT_DEVCLK_FREQ 1000000 +#define BNXT_LO_TIMER_MASK 0x0000ffffffffUL +#define BNXT_HI_TIMER_MASK 0xffff00000000UL +#define BNXT_HI_TIMER_SHIFT 24 + +#define BNXT_PTP_DFLT_TX_TMO 1000 /* ms */ +#define BNXT_PTP_QTS_TIMEOUT 1000 +#define BNXT_PTP_QTS_MAX_TMO_US 65535U +#define BNXT_PTP_QTS_TX_ENABLES (PORT_TS_QUERY_REQ_ENABLES_PTP_SEQ_ID | \ + PORT_TS_QUERY_REQ_ENABLES_TS_REQ_TIMEOUT | \ + PORT_TS_QUERY_REQ_ENABLES_PTP_HDR_OFFSET) + +struct pps_pin { + u8 event; + u8 usage; + u8 state; +}; + +#define TSIO_PIN_VALID(pin) ((pin) >= 0 && (pin) < (BNXT_MAX_TSIO_PINS)) + +#define EVENT_DATA2_PPS_EVENT_TYPE(data2) \ + ((data2) & ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE) + +#define EVENT_DATA2_PPS_PIN_NUM(data2) \ + (((data2) & \ + ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PIN_NUMBER_MASK) >>\ + ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PIN_NUMBER_SFT) + +#define BNXT_DATA2_UPPER_MSK \ + ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PPS_TIMESTAMP_UPPER_MASK + +#define BNXT_DATA2_UPPER_SFT \ + (32 - \ + ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PPS_TIMESTAMP_UPPER_SFT) + +#define BNXT_DATA1_LOWER_MSK \ + ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA1_PPS_TIMESTAMP_LOWER_MASK + +#define BNXT_DATA1_LOWER_SFT \ + ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA1_PPS_TIMESTAMP_LOWER_SFT + +#define EVENT_PPS_TS(data2, data1) \ + (((u64)((data2) & BNXT_DATA2_UPPER_MSK) << BNXT_DATA2_UPPER_SFT) |\ + (((data1) & BNXT_DATA1_LOWER_MSK) >> BNXT_DATA1_LOWER_SFT)) + +#define BNXT_PPS_PIN_DISABLE 0 +#define BNXT_PPS_PIN_ENABLE 1 +#define BNXT_PPS_PIN_NONE 0 +#define BNXT_PPS_PIN_PPS_IN 1 +#define BNXT_PPS_PIN_PPS_OUT 2 +#define BNXT_PPS_PIN_SYNC_IN 3 +#define BNXT_PPS_PIN_SYNC_OUT 4 + +#define BNXT_PPS_EVENT_INTERNAL 1 +#define BNXT_PPS_EVENT_EXTERNAL 2 + +struct bnxt_pps { + u8 num_pins; +#define BNXT_MAX_TSIO_PINS 4 + struct pps_pin pins[BNXT_MAX_TSIO_PINS]; +}; + +struct bnxt_ptp_stats { + u64 ts_pkts; + u64 ts_lost; + atomic64_t ts_err; +}; + +#define BNXT_MAX_TX_TS 4 +#define NEXT_TXTS(idx) (((idx) + 1) & (BNXT_MAX_TX_TS - 1)) + +struct bnxt_ptp_tx_req { + struct sk_buff *tx_skb; + u16 tx_seqid; + u16 tx_hdr_off; + unsigned long abs_txts_tmo; +}; + +struct bnxt_ptp_cfg { + struct ptp_clock_info ptp_info; + struct ptp_clock *ptp_clock; + struct cyclecounter cc; + struct timecounter tc; + struct bnxt_pps pps_info; + /* serialize timecounter access */ + seqlock_t ptp_lock; + /* serialize ts tx request queuing */ + spinlock_t ptp_tx_lock; + u64 current_time; + unsigned long next_period; + unsigned long next_overflow_check; + u32 cmult; + /* cache of upper 24 bits of cyclecoutner. 8 bits are used to check for roll-over */ + u32 old_time; + /* a 23b shift cyclecounter will overflow in ~36 mins. Check overflow every 18 mins. */ + #define BNXT_PHC_OVERFLOW_PERIOD (18 * 60 * HZ) + + struct bnxt_ptp_tx_req txts_req[BNXT_MAX_TX_TS]; + + struct bnxt *bp; + u32 tx_avail; + u16 rxctl; +#define BNXT_PTP_MSG_SYNC (1 << 0) +#define BNXT_PTP_MSG_DELAY_REQ (1 << 1) +#define BNXT_PTP_MSG_PDELAY_REQ (1 << 2) +#define BNXT_PTP_MSG_PDELAY_RESP (1 << 3) +#define BNXT_PTP_MSG_FOLLOW_UP (1 << 8) +#define BNXT_PTP_MSG_DELAY_RESP (1 << 9) +#define BNXT_PTP_MSG_PDELAY_RESP_FOLLOW_UP (1 << 10) +#define BNXT_PTP_MSG_ANNOUNCE (1 << 11) +#define BNXT_PTP_MSG_SIGNALING (1 << 12) +#define BNXT_PTP_MSG_MANAGEMENT (1 << 13) +#define BNXT_PTP_MSG_EVENTS (BNXT_PTP_MSG_SYNC | \ + BNXT_PTP_MSG_DELAY_REQ | \ + BNXT_PTP_MSG_PDELAY_REQ | \ + BNXT_PTP_MSG_PDELAY_RESP) + u8 tx_tstamp_en:1; + u8 rtc_configured:1; + int rx_filter; + u32 tstamp_filters; + + u32 refclk_regs[2]; + u32 refclk_mapped_regs[2]; + u32 txts_tmo; + u16 txts_prod; + u16 txts_cons; + + struct bnxt_ptp_stats stats; +}; + +#define BNXT_PTP_INC_TX_AVAIL(ptp) \ +do { \ + spin_lock_bh(&(ptp)->ptp_tx_lock); \ + (ptp)->tx_avail++; \ + spin_unlock_bh(&(ptp)->ptp_tx_lock); \ +} while (0) + +int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id, u16 *hdr_off); +void bnxt_ptp_update_current_time(struct bnxt *bp); +void bnxt_ptp_pps_event(struct bnxt *bp, u32 data1, u32 data2); +int bnxt_ptp_cfg_tstamp_filters(struct bnxt *bp); +void bnxt_ptp_reapply_pps(struct bnxt *bp); +int bnxt_hwtstamp_set(struct net_device *dev, + struct kernel_hwtstamp_config *stmpconf, + struct netlink_ext_ack *extack); +int bnxt_hwtstamp_get(struct net_device *dev, + struct kernel_hwtstamp_config *stmpconf); +void bnxt_ptp_free_txts_skbs(struct bnxt_ptp_cfg *ptp); +int bnxt_ptp_get_txts_prod(struct bnxt_ptp_cfg *ptp, u16 *prod); +void bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb, u16 prod); +int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts); +void bnxt_tx_ts_cmp(struct bnxt *bp, struct bnxt_napi *bnapi, + struct tx_ts_cmp *tscmp); +void bnxt_ptp_rtc_timecounter_init(struct bnxt_ptp_cfg *ptp, u64 ns); +int bnxt_ptp_init_rtc(struct bnxt *bp, bool phc_cfg); +int bnxt_ptp_init(struct bnxt *bp); +void bnxt_ptp_clear(struct bnxt *bp); +static inline u64 bnxt_timecounter_cyc2time(struct bnxt_ptp_cfg *ptp, u64 ts) +{ + unsigned int seq; + u64 ns; + + do { + seq = read_seqbegin(&ptp->ptp_lock); + ns = timecounter_cyc2time(&ptp->tc, ts); + } while (read_seqretry(&ptp->ptp_lock, seq)); + + return ns; +} + +static inline u64 bnxt_extend_cycles_32b_to_48b(struct bnxt_ptp_cfg *ptp, u32 ts) +{ + u64 time, cycles; + + time = (u64)READ_ONCE(ptp->old_time) << BNXT_HI_TIMER_SHIFT; + cycles = (time & BNXT_HI_TIMER_MASK) | ts; + if (ts < (time & BNXT_LO_TIMER_MASK)) + cycles += BNXT_LO_TIMER_MASK + 1; + return cycles; +} +#endif |