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_CYCLES_SHIFT 23 21 #define BNXT_DEVCLK_FREQ 1000000 22 #define BNXT_LO_TIMER_MASK 0x0000ffffffffUL 23 #define BNXT_HI_TIMER_MASK 0xffff00000000UL 24 25 #define BNXT_PTP_QTS_TIMEOUT 1000 26 #define BNXT_PTP_QTS_TX_ENABLES (PORT_TS_QUERY_REQ_ENABLES_PTP_SEQ_ID | \ 27 PORT_TS_QUERY_REQ_ENABLES_TS_REQ_TIMEOUT | \ 28 PORT_TS_QUERY_REQ_ENABLES_PTP_HDR_OFFSET) 29 30 struct pps_pin { 31 u8 event; 32 u8 usage; 33 u8 state; 34 }; 35 36 #define TSIO_PIN_VALID(pin) ((pin) >= 0 && (pin) < (BNXT_MAX_TSIO_PINS)) 37 38 #define EVENT_DATA2_PPS_EVENT_TYPE(data2) \ 39 ((data2) & ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_EVENT_TYPE) 40 41 #define EVENT_DATA2_PPS_PIN_NUM(data2) \ 42 (((data2) & \ 43 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PIN_NUMBER_MASK) >>\ 44 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PIN_NUMBER_SFT) 45 46 #define BNXT_DATA2_UPPER_MSK \ 47 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PPS_TIMESTAMP_UPPER_MASK 48 49 #define BNXT_DATA2_UPPER_SFT \ 50 (32 - \ 51 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA2_PPS_TIMESTAMP_UPPER_SFT) 52 53 #define BNXT_DATA1_LOWER_MSK \ 54 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA1_PPS_TIMESTAMP_LOWER_MASK 55 56 #define BNXT_DATA1_LOWER_SFT \ 57 ASYNC_EVENT_CMPL_PPS_TIMESTAMP_EVENT_DATA1_PPS_TIMESTAMP_LOWER_SFT 58 59 #define EVENT_PPS_TS(data2, data1) \ 60 (((u64)((data2) & BNXT_DATA2_UPPER_MSK) << BNXT_DATA2_UPPER_SFT) |\ 61 (((data1) & BNXT_DATA1_LOWER_MSK) >> BNXT_DATA1_LOWER_SFT)) 62 63 #define BNXT_PPS_PIN_DISABLE 0 64 #define BNXT_PPS_PIN_ENABLE 1 65 #define BNXT_PPS_PIN_NONE 0 66 #define BNXT_PPS_PIN_PPS_IN 1 67 #define BNXT_PPS_PIN_PPS_OUT 2 68 #define BNXT_PPS_PIN_SYNC_IN 3 69 #define BNXT_PPS_PIN_SYNC_OUT 4 70 71 #define BNXT_PPS_EVENT_INTERNAL 1 72 #define BNXT_PPS_EVENT_EXTERNAL 2 73 74 struct bnxt_pps { 75 u8 num_pins; 76 #define BNXT_MAX_TSIO_PINS 4 77 struct pps_pin pins[BNXT_MAX_TSIO_PINS]; 78 }; 79 80 struct bnxt_ptp_cfg { 81 struct ptp_clock_info ptp_info; 82 struct ptp_clock *ptp_clock; 83 struct cyclecounter cc; 84 struct timecounter tc; 85 struct bnxt_pps pps_info; 86 /* serialize timecounter access */ 87 spinlock_t ptp_lock; 88 struct sk_buff *tx_skb; 89 u64 current_time; 90 u64 old_time; 91 unsigned long next_period; 92 unsigned long next_overflow_check; 93 u32 cmult; 94 /* a 23b shift cyclecounter will overflow in ~36 mins. Check overflow every 18 mins. */ 95 #define BNXT_PHC_OVERFLOW_PERIOD (18 * 60 * HZ) 96 97 u16 tx_seqid; 98 u16 tx_hdr_off; 99 struct bnxt *bp; 100 atomic_t tx_avail; 101 #define BNXT_MAX_TX_TS 1 102 u16 rxctl; 103 #define BNXT_PTP_MSG_SYNC (1 << 0) 104 #define BNXT_PTP_MSG_DELAY_REQ (1 << 1) 105 #define BNXT_PTP_MSG_PDELAY_REQ (1 << 2) 106 #define BNXT_PTP_MSG_PDELAY_RESP (1 << 3) 107 #define BNXT_PTP_MSG_FOLLOW_UP (1 << 8) 108 #define BNXT_PTP_MSG_DELAY_RESP (1 << 9) 109 #define BNXT_PTP_MSG_PDELAY_RESP_FOLLOW_UP (1 << 10) 110 #define BNXT_PTP_MSG_ANNOUNCE (1 << 11) 111 #define BNXT_PTP_MSG_SIGNALING (1 << 12) 112 #define BNXT_PTP_MSG_MANAGEMENT (1 << 13) 113 #define BNXT_PTP_MSG_EVENTS (BNXT_PTP_MSG_SYNC | \ 114 BNXT_PTP_MSG_DELAY_REQ | \ 115 BNXT_PTP_MSG_PDELAY_REQ | \ 116 BNXT_PTP_MSG_PDELAY_RESP) 117 u8 tx_tstamp_en:1; 118 int rx_filter; 119 u32 tstamp_filters; 120 121 u32 refclk_regs[2]; 122 u32 refclk_mapped_regs[2]; 123 }; 124 125 #if BITS_PER_LONG == 32 126 #define BNXT_READ_TIME64(ptp, dst, src) \ 127 do { \ 128 spin_lock_bh(&(ptp)->ptp_lock); \ 129 (dst) = (src); \ 130 spin_unlock_bh(&(ptp)->ptp_lock); \ 131 } while (0) 132 #else 133 #define BNXT_READ_TIME64(ptp, dst, src) \ 134 ((dst) = READ_ONCE(src)) 135 #endif 136 137 int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id, u16 *hdr_off); 138 void bnxt_ptp_update_current_time(struct bnxt *bp); 139 void bnxt_ptp_pps_event(struct bnxt *bp, u32 data1, u32 data2); 140 int bnxt_ptp_cfg_tstamp_filters(struct bnxt *bp); 141 void bnxt_ptp_reapply_pps(struct bnxt *bp); 142 int bnxt_hwtstamp_set(struct net_device *dev, struct ifreq *ifr); 143 int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr); 144 int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb); 145 int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts); 146 void bnxt_ptp_rtc_timecounter_init(struct bnxt_ptp_cfg *ptp, u64 ns); 147 int bnxt_ptp_init_rtc(struct bnxt *bp, bool phc_cfg); 148 int bnxt_ptp_init(struct bnxt *bp, bool phc_cfg); 149 void bnxt_ptp_clear(struct bnxt *bp); 150 #endif 151