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/* 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_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 */
spinlock_t ptp_lock;
/* serialize ts tx request queuing */
spinlock_t ptp_tx_lock;
u64 current_time;
u64 old_time;
unsigned long next_period;
unsigned long next_overflow_check;
u32 cmult;
/* 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;
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;
};
#if BITS_PER_LONG == 32
#define BNXT_READ_TIME64(ptp, dst, src) \
do { \
spin_lock_bh(&(ptp)->ptp_lock); \
(dst) = (src); \
spin_unlock_bh(&(ptp)->ptp_lock); \
} while (0)
#else
#define BNXT_READ_TIME64(ptp, dst, src) \
((dst) = READ_ONCE(src))
#endif
#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 ifreq *ifr);
int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr);
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, bool phc_cfg);
void bnxt_ptp_clear(struct bnxt *bp);
#endif
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