drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h

   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 #define BNXT_PTP_GRC_WIN        6
  14 #define BNXT_PTP_GRC_WIN_BASE   0x6000
  15
  16 #define BNXT_MAX_PHC_DRIFT      31000000
  17 #define BNXT_LO_TIMER_MASK      0x0000ffffffffUL
  18 #define BNXT_HI_TIMER_MASK      0xffff00000000UL
  19
  20 #define BNXT_PTP_QTS_TIMEOUT    1000
  21 #define BNXT_PTP_QTS_TX_ENABLES (PORT_TS_QUERY_REQ_ENABLES_PTP_SEQ_ID | \
  22                                  PORT_TS_QUERY_REQ_ENABLES_TS_REQ_TIMEOUT | \
  23                                  PORT_TS_QUERY_REQ_ENABLES_PTP_HDR_OFFSET)
  24
  25 struct bnxt_ptp_cfg {
  26         struct ptp_clock_info   ptp_info;
  27         struct ptp_clock        *ptp_clock;
  28         struct cyclecounter     cc;
  29         struct timecounter      tc;
  30         /* serialize timecounter access */
  31         spinlock_t              ptp_lock;
  32         struct sk_buff          *tx_skb;
  33         u64                     current_time;
  34         u64                     old_time;
  35         unsigned long           next_period;
  36         unsigned long           next_overflow_check;
  37         /* 48-bit PHC overflows in 78 hours.  Check overflow every 19 hours. */
  38         #define BNXT_PHC_OVERFLOW_PERIOD        (19 * 3600 * HZ)
  39
  40         u16                     tx_seqid;
  41         u16                     tx_hdr_off;
  42         struct bnxt             *bp;
  43         atomic_t                tx_avail;
  44 #define BNXT_MAX_TX_TS  1
  45         u16                     rxctl;
  46 #define BNXT_PTP_MSG_SYNC                       (1 << 0)
  47 #define BNXT_PTP_MSG_DELAY_REQ                  (1 << 1)
  48 #define BNXT_PTP_MSG_PDELAY_REQ                 (1 << 2)
  49 #define BNXT_PTP_MSG_PDELAY_RESP                (1 << 3)
  50 #define BNXT_PTP_MSG_FOLLOW_UP                  (1 << 8)
  51 #define BNXT_PTP_MSG_DELAY_RESP                 (1 << 9)
  52 #define BNXT_PTP_MSG_PDELAY_RESP_FOLLOW_UP      (1 << 10)
  53 #define BNXT_PTP_MSG_ANNOUNCE                   (1 << 11)
  54 #define BNXT_PTP_MSG_SIGNALING                  (1 << 12)
  55 #define BNXT_PTP_MSG_MANAGEMENT                 (1 << 13)
  56 #define BNXT_PTP_MSG_EVENTS             (BNXT_PTP_MSG_SYNC |            \
  57                                          BNXT_PTP_MSG_DELAY_REQ |       \
  58                                          BNXT_PTP_MSG_PDELAY_REQ |      \
  59                                          BNXT_PTP_MSG_PDELAY_RESP)
  60         u8                      tx_tstamp_en:1;
  61         int                     rx_filter;
  62
  63         u32                     refclk_regs[2];
  64         u32                     refclk_mapped_regs[2];
  65 };
  66
  67 #if BITS_PER_LONG == 32
  68 #define BNXT_READ_TIME64(ptp, dst, src)         \
  69 do {                                            \
  70         spin_lock_bh(&(ptp)->ptp_lock);         \
  71         (dst) = (src);                          \
  72         spin_unlock_bh(&(ptp)->ptp_lock);       \
  73 } while (0)
  74 #else
  75 #define BNXT_READ_TIME64(ptp, dst, src)         \
  76         ((dst) = READ_ONCE(src))
  77 #endif
  78
  79 int bnxt_ptp_parse(struct sk_buff *skb, u16 *seq_id, u16 *hdr_off);
  80 int bnxt_hwtstamp_set(struct net_device *dev, struct ifreq *ifr);
  81 int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr);
  82 int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb);
  83 int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts);
  84 int bnxt_ptp_init(struct bnxt *bp);
  85 void bnxt_ptp_clear(struct bnxt *bp);
  86 #endif