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 | |