1 /* Broadcom NetXtreme-C/E network driver. 2 * 3 * Copyright (c) 2021 Broadcom Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation. 8 */ 9 10 #ifndef BNXT_PTP_H 11 #define BNXT_PTP_H 12 13 #include <linux/ptp_clock_kernel.h> 14 #include <linux/timecounter.h> 15 16 #define BNXT_PTP_GRC_WIN 6 17 #define BNXT_PTP_GRC_WIN_BASE 0x6000 18 19 #define BNXT_MAX_PHC_DRIFT 31000000 20 #define BNXT_LO_TIMER_MASK 0x0000ffffffffUL 21 #define BNXT_HI_TIMER_MASK 0xffff00000000UL 22 23 #define BNXT_PTP_QTS_TIMEOUT 1000 24 #define BNXT_PTP_QTS_TX_ENABLES (PORT_TS_QUERY_REQ_ENABLES_PTP_SEQ_ID | \ 25 PORT_TS_QUERY_REQ_ENABLES_TS_REQ_TIMEOUT | \ 26 PORT_TS_QUERY_REQ_ENABLES_PTP_HDR_OFFSET) 27 28 struct pps_pin { 29 u8 event; 30 u8 usage; 31 u8 state; 32 }; 33 34 #define TSIO_PIN_VALID(pin) ((pin) >= 0 && (pin) < (BNXT_MAX_TSIO_PINS)) 35 36 #define EVENT_DATA2_PPS_EVENT_TYPE(data2) \ 37 ((data2) & ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE) 38 39 #define EVENT_DATA2_PPS_PIN_NUM(data2) \ 40 (((data2) & \ 41 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PIN_NUMBER_MASK) >>\ 42 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PIN_NUMBER_SFT) 43 44 #define BNXT_DATA2_UPPER_MSK \ 45 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PPS_TIMESTAMP_UPPER_MASK 46 47 #define BNXT_DATA2_UPPER_SFT \ 48 (32 - \ 49 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PPS_TIMESTAMP_UPPER_SFT) 50 51 #define BNXT_DATA1_LOWER_MSK \ 52 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA1_PPS_TIMESTAMP_LOWER_MASK 53 54 #define BNXT_DATA1_LOWER_SFT \ 55 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA1_PPS_TIMESTAMP_LOWER_SFT 56 57 #define EVENT_PPS_TS(data2, data1) \ 58 (((u64)((data2) & BNXT_DATA2_UPPER_MSK) << BNXT_DATA2_UPPER_SFT) |\ 59 (((data1) & BNXT_DATA1_LOWER_MSK) >> BNXT_DATA1_LOWER_SFT)) 60 61 #define BNXT_PPS_PIN_DISABLE 0 62 #define BNXT_PPS_PIN_ENABLE 1 63 #define BNXT_PPS_PIN_NONE 0 64 #define BNXT_PPS_PIN_PPS_IN 1 65 #define BNXT_PPS_PIN_PPS_OUT 2 66 #define BNXT_PPS_PIN_SYNC_IN 3 67 #define BNXT_PPS_PIN_SYNC_OUT 4 68 69 #define BNXT_PPS_EVENT_INTERNAL 1 70 #define BNXT_PPS_EVENT_EXTERNAL 2 71 72 struct bnxt_pps { 73 u8 num_pins; 74 #define BNXT_MAX_TSIO_PINS 4 75 struct pps_pin pins[BNXT_MAX_TSIO_PINS]; 76 }; 77 78 struct bnxt_ptp_cfg { 79 struct ptp_clock_info ptp_info; 80 struct ptp_clock *ptp_clock; 81 struct cyclecounter cc; 82 struct timecounter tc; 83 struct bnxt_pps pps_info; 84 /* serialize timecounter access */ 85 spinlock_t ptp_lock; 86 struct sk_buff *tx_skb; 87 u64 current_time; 88 u64 old_time; 89 unsigned long next_period; 90 unsigned long next_overflow_check; 91 /* 48-bit PHC overflows in 78 hours. Check overflow every 19 hours. */ 92 #define BNXT_PHC_OVERFLOW_PERIOD (19 * 3600 * HZ) 93 94 u16 tx_seqid; 95 u16 tx_hdr_off; 96 struct bnxt *bp; 97 atomic_t tx_avail; 98 #define BNXT_MAX_TX_TS 1 99 u16 rxctl; 100 #define BNXT_PTP_MSG_SYNC (1 << 0) 101 #define BNXT_PTP_MSG_DELAY_REQ (1 << 1) 102 #define BNXT_PTP_MSG_PDELAY_REQ (1 << 2) 103 #define BNXT_PTP_MSG_PDELAY_RESP (1 << 3) 104 #define BNXT_PTP_MSG_FOLLOW_UP (1 << 8) 105 #define BNXT_PTP_MSG_DELAY_RESP (1 << 9) 106 #define BNXT_PTP_MSG_PDELAY_RESP_FOLLOW_UP (1 << 10) 107 #define BNXT_PTP_MSG_ANNOUNCE (1 << 11) 108 #define BNXT_PTP_MSG_SIGNALING (1 << 12) 109 #define BNXT_PTP_MSG_MANAGEMENT (1 << 13) 110 #define BNXT_PTP_MSG_EVENTS (BNXT_PTP_MSG_SYNC | \ 111 BNXT_PTP_MSG_DELAY_REQ | \ 112 BNXT_PTP_MSG_PDELAY_REQ | \ 113 BNXT_PTP_MSG_PDELAY_RESP) 114 u8 tx_tstamp_en:1; 115 int rx_filter; 116 117 u32 refclk_regs[2]; 118 u32 refclk_mapped_regs[2]; 119 }; 120 121 #if BITS_PER_LONG == 32 122 #define BNXT_READ_TIME64(ptp, dst, src) \ 123 do { \ 124 spin_lock_bh(&(ptp)->ptp_lock); \ 125 (dst) = (src); \ 126 spin_unlock_bh(&(ptp)->ptp_lock); \ 127 } while (0) 128 #else 129 #define BNXT_READ_TIME64(ptp, dst, src) \ 130 ((dst) = READ_ONCE(src)) 131 #endif 132 133 int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id, u16 *hdr_off); 134 void bnxt_ptp_update_current_time(struct bnxt *bp); 135 void bnxt_ptp_pps_event(struct bnxt *bp, u32 data1, u32 data2); 136 void bnxt_ptp_reapply_pps(struct bnxt *bp); 137 int bnxt_hwtstamp_set(struct net_device *dev, struct ifreq *ifr); 138 int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr); 139 int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb); 140 int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts); 141 void bnxt_ptp_rtc_timecounter_init(struct bnxt_ptp_cfg *ptp, u64 ns); 142 int bnxt_ptp_init_rtc(struct bnxt *bp, bool phc_cfg); 143 int bnxt_ptp_init(struct bnxt *bp, bool phc_cfg); 144 void bnxt_ptp_clear(struct bnxt *bp); 145 #endif 146