^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /****************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Driver for Solarflare network controllers and boards
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright 2011-2013 Solarflare Communications Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) /* Theory of operation:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * PTP support is assisted by firmware running on the MC, which provides
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * the hardware timestamping capabilities. Both transmitted and received
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * PTP event packets are queued onto internal queues for subsequent processing;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * this is because the MC operations are relatively long and would block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * block NAPI/interrupt operation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Receive event processing:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * The event contains the packet's UUID and sequence number, together
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * with the hardware timestamp. The PTP receive packet queue is searched
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * for this UUID/sequence number and, if found, put on a pending queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * Packets not matching are delivered without timestamps (MCDI events will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * always arrive after the actual packet).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * It is important for the operation of the PTP protocol that the ordering
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * of packets between the event and general port is maintained.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * Work queue processing:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * If work waiting, synchronise host/hardware time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * Transmit: send packet through MC, which returns the transmission time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * that is converted to an appropriate timestamp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Receive: the packet's reception time is converted to an appropriate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * timestamp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/ip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/udp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/ktime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/pps_kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/ptp_clock_kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include "net_driver.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include "efx.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include "mcdi.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include "mcdi_pcol.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include "io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include "farch_regs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include "tx.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include "nic.h" /* indirectly includes ptp.h */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* Maximum number of events expected to make up a PTP event */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define MAX_EVENT_FRAGS 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* Maximum delay, ms, to begin synchronisation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define MAX_SYNCHRONISE_WAIT_MS 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* How long, at most, to spend synchronising */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define SYNCHRONISE_PERIOD_NS 250000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* How often to update the shared memory time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define SYNCHRONISATION_GRANULARITY_NS 200
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /* Minimum permitted length of a (corrected) synchronisation time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define DEFAULT_MIN_SYNCHRONISATION_NS 120
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) /* Maximum permitted length of a (corrected) synchronisation time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define MAX_SYNCHRONISATION_NS 1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* How many (MC) receive events that can be queued */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define MAX_RECEIVE_EVENTS 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* Length of (modified) moving average. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define AVERAGE_LENGTH 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /* How long an unmatched event or packet can be held */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #define PKT_EVENT_LIFETIME_MS 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /* Offsets into PTP packet for identification. These offsets are from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * start of the IP header, not the MAC header. Note that neither PTP V1 nor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * PTP V2 permit the use of IPV4 options.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #define PTP_DPORT_OFFSET 22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define PTP_V1_VERSION_LENGTH 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #define PTP_V1_VERSION_OFFSET 28
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define PTP_V1_UUID_LENGTH 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define PTP_V1_UUID_OFFSET 50
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define PTP_V1_SEQUENCE_LENGTH 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) #define PTP_V1_SEQUENCE_OFFSET 58
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /* The minimum length of a PTP V1 packet for offsets, etc. to be valid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * includes IP header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #define PTP_V1_MIN_LENGTH 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #define PTP_V2_VERSION_LENGTH 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #define PTP_V2_VERSION_OFFSET 29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #define PTP_V2_UUID_LENGTH 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #define PTP_V2_UUID_OFFSET 48
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* Although PTP V2 UUIDs are comprised a ClockIdentity (8) and PortNumber (2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * the MC only captures the last six bytes of the clock identity. These values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * reflect those, not the ones used in the standard. The standard permits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * mapping of V1 UUIDs to V2 UUIDs with these same values.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define PTP_V2_MC_UUID_LENGTH 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define PTP_V2_MC_UUID_OFFSET 50
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define PTP_V2_SEQUENCE_LENGTH 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define PTP_V2_SEQUENCE_OFFSET 58
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /* The minimum length of a PTP V2 packet for offsets, etc. to be valid:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * includes IP header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define PTP_V2_MIN_LENGTH 63
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define PTP_MIN_LENGTH 63
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define PTP_ADDRESS 0xe0000181 /* 224.0.1.129 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define PTP_EVENT_PORT 319
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define PTP_GENERAL_PORT 320
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /* Annoyingly the format of the version numbers are different between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * versions 1 and 2 so it isn't possible to simply look for 1 or 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #define PTP_VERSION_V1 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #define PTP_VERSION_V2 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #define PTP_VERSION_V2_MASK 0x0f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) enum ptp_packet_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) PTP_PACKET_STATE_UNMATCHED = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) PTP_PACKET_STATE_MATCHED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) PTP_PACKET_STATE_TIMED_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) PTP_PACKET_STATE_MATCH_UNWANTED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* NIC synchronised with single word of time only comprising
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * partial seconds and full nanoseconds: 10^9 ~ 2^30 so 2 bits for seconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #define MC_NANOSECOND_BITS 30
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #define MC_NANOSECOND_MASK ((1 << MC_NANOSECOND_BITS) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) #define MC_SECOND_MASK ((1 << (32 - MC_NANOSECOND_BITS)) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) /* Maximum parts-per-billion adjustment that is acceptable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #define MAX_PPB 1000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) /* Precalculate scale word to avoid long long division at runtime */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /* This is equivalent to 2^66 / 10^9. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #define PPB_SCALE_WORD ((1LL << (57)) / 1953125LL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /* How much to shift down after scaling to convert to FP40 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) #define PPB_SHIFT_FP40 26
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /* ... and FP44. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) #define PPB_SHIFT_FP44 22
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #define PTP_SYNC_ATTEMPTS 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * struct efx_ptp_match - Matching structure, stored in sk_buff's cb area.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * @words: UUID and (partial) sequence number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * @expiry: Time after which the packet should be delivered irrespective of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * event arrival.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * @state: The state of the packet - whether it is ready for processing or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * whether that is of no interest.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct efx_ptp_match {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) u32 words[DIV_ROUND_UP(PTP_V1_UUID_LENGTH, 4)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) unsigned long expiry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) enum ptp_packet_state state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * struct efx_ptp_event_rx - A PTP receive event (from MC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * @link: list of events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * @seq0: First part of (PTP) UUID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * @seq1: Second part of (PTP) UUID and sequence number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * @hwtimestamp: Event timestamp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * @expiry: Time which the packet arrived
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) struct efx_ptp_event_rx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) struct list_head link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) u32 seq0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) u32 seq1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) ktime_t hwtimestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) unsigned long expiry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * struct efx_ptp_timeset - Synchronisation between host and MC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * @host_start: Host time immediately before hardware timestamp taken
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * @major: Hardware timestamp, major
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * @minor: Hardware timestamp, minor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * @host_end: Host time immediately after hardware timestamp taken
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * @wait: Number of NIC clock ticks between hardware timestamp being read and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * host end time being seen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * @window: Difference of host_end and host_start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * @valid: Whether this timeset is valid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) struct efx_ptp_timeset {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) u32 host_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) u32 major;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) u32 minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) u32 host_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) u32 wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) u32 window; /* Derived: end - start, allowing for wrap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * struct efx_ptp_data - Precision Time Protocol (PTP) state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * @efx: The NIC context
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * @channel: The PTP channel (Siena only)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * @rx_ts_inline: Flag for whether RX timestamps are inline (else they are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) * separate events)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) * @rxq: Receive SKB queue (awaiting timestamps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) * @txq: Transmit SKB queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) * @evt_list: List of MC receive events awaiting packets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * @evt_free_list: List of free events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * @evt_lock: Lock for manipulating evt_list and evt_free_list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * @rx_evts: Instantiated events (on evt_list and evt_free_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) * @workwq: Work queue for processing pending PTP operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * @work: Work task
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * @reset_required: A serious error has occurred and the PTP task needs to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * reset (disable, enable).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * @rxfilter_event: Receive filter when operating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * @rxfilter_general: Receive filter when operating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * @rxfilter_installed: Receive filter installed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * @config: Current timestamp configuration
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * @enabled: PTP operation enabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * @mode: Mode in which PTP operating (PTP version)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * @ns_to_nic_time: Function to convert from scalar nanoseconds to NIC time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * @nic_to_kernel_time: Function to convert from NIC to kernel time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * @nic_time: contains time details
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * @nic_time.minor_max: Wrap point for NIC minor times
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * @nic_time.sync_event_diff_min: Minimum acceptable difference between time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * in packet prefix and last MCDI time sync event i.e. how much earlier than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * the last sync event time a packet timestamp can be.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * @nic_time.sync_event_diff_max: Maximum acceptable difference between time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) * in packet prefix and last MCDI time sync event i.e. how much later than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) * the last sync event time a packet timestamp can be.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) * @nic_time.sync_event_minor_shift: Shift required to make minor time from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) * field in MCDI time sync event.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) * @min_synchronisation_ns: Minimum acceptable corrected sync window
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * @capabilities: Capabilities flags from the NIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) * @ts_corrections: contains corrections details
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) * @ts_corrections.ptp_tx: Required driver correction of PTP packet transmit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * timestamps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * @ts_corrections.ptp_rx: Required driver correction of PTP packet receive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) * timestamps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) * @ts_corrections.pps_out: PPS output error (information only)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) * @ts_corrections.pps_in: Required driver correction of PPS input timestamps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) * @ts_corrections.general_tx: Required driver correction of general packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) * transmit timestamps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * @ts_corrections.general_rx: Required driver correction of general packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * receive timestamps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) * @evt_frags: Partly assembled PTP events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) * @evt_frag_idx: Current fragment number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) * @evt_code: Last event code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) * @start: Address at which MC indicates ready for synchronisation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) * @host_time_pps: Host time at last PPS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) * @adjfreq_ppb_shift: Shift required to convert scaled parts-per-billion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * frequency adjustment into a fixed point fractional nanosecond format.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * @current_adjfreq: Current ppb adjustment.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * @phc_clock: Pointer to registered phc device (if primary function)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * @phc_clock_info: Registration structure for phc device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * @pps_work: pps work task for handling pps events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * @pps_workwq: pps work queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * @nic_ts_enabled: Flag indicating if NIC generated TS events are handled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * @txbuf: Buffer for use when transmitting (PTP) packets to MC (avoids
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * allocations in main data path).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) * @good_syncs: Number of successful synchronisations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * @fast_syncs: Number of synchronisations requiring short delay
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * @bad_syncs: Number of failed synchronisations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) * @sync_timeouts: Number of synchronisation timeouts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) * @no_time_syncs: Number of synchronisations with no good times.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) * @invalid_sync_windows: Number of sync windows with bad durations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) * @undersize_sync_windows: Number of corrected sync windows that are too small
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * @oversize_sync_windows: Number of corrected sync windows that are too large
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * @rx_no_timestamp: Number of packets received without a timestamp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * @timeset: Last set of synchronisation statistics.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * @xmit_skb: Transmit SKB function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) struct efx_ptp_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct efx_nic *efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) struct efx_channel *channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) bool rx_ts_inline;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct sk_buff_head rxq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) struct sk_buff_head txq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct list_head evt_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) struct list_head evt_free_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) spinlock_t evt_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) struct efx_ptp_event_rx rx_evts[MAX_RECEIVE_EVENTS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) struct workqueue_struct *workwq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) struct work_struct work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) bool reset_required;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) u32 rxfilter_event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) u32 rxfilter_general;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) bool rxfilter_installed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct hwtstamp_config config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) bool enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) unsigned int mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) void (*ns_to_nic_time)(s64 ns, u32 *nic_major, u32 *nic_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) ktime_t (*nic_to_kernel_time)(u32 nic_major, u32 nic_minor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) s32 correction);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) u32 minor_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) u32 sync_event_diff_min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) u32 sync_event_diff_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) unsigned int sync_event_minor_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) } nic_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) unsigned int min_synchronisation_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) unsigned int capabilities;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) s32 ptp_tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) s32 ptp_rx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) s32 pps_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) s32 pps_in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) s32 general_tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) s32 general_rx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) } ts_corrections;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) efx_qword_t evt_frags[MAX_EVENT_FRAGS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) int evt_frag_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) int evt_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) struct efx_buffer start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) struct pps_event_time host_time_pps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) unsigned int adjfreq_ppb_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) s64 current_adjfreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) struct ptp_clock *phc_clock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) struct ptp_clock_info phc_clock_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) struct work_struct pps_work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) struct workqueue_struct *pps_workwq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) bool nic_ts_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) efx_dword_t txbuf[MCDI_TX_BUF_LEN(MC_CMD_PTP_IN_TRANSMIT_LENMAX)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) unsigned int good_syncs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) unsigned int fast_syncs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) unsigned int bad_syncs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) unsigned int sync_timeouts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) unsigned int no_time_syncs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) unsigned int invalid_sync_windows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) unsigned int undersize_sync_windows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) unsigned int oversize_sync_windows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) unsigned int rx_no_timestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) struct efx_ptp_timeset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) timeset[MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_MAXNUM];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) void (*xmit_skb)(struct efx_nic *efx, struct sk_buff *skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) static int efx_phc_settime(struct ptp_clock_info *ptp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) const struct timespec64 *e_ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) static int efx_phc_enable(struct ptp_clock_info *ptp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) struct ptp_clock_request *request, int on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) bool efx_ptp_use_mac_tx_timestamps(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return efx_has_cap(efx, TX_MAC_TIMESTAMPING);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) /* PTP 'extra' channel is still a traffic channel, but we only create TX queues
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) * if PTP uses MAC TX timestamps, not if PTP uses the MC directly to transmit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) static bool efx_ptp_want_txqs(struct efx_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) return efx_ptp_use_mac_tx_timestamps(channel->efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) #define PTP_SW_STAT(ext_name, field_name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) { #ext_name, 0, offsetof(struct efx_ptp_data, field_name) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) #define PTP_MC_STAT(ext_name, mcdi_name) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) { #ext_name, 32, MC_CMD_PTP_OUT_STATUS_STATS_ ## mcdi_name ## _OFST }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) static const struct efx_hw_stat_desc efx_ptp_stat_desc[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) PTP_SW_STAT(ptp_good_syncs, good_syncs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) PTP_SW_STAT(ptp_fast_syncs, fast_syncs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) PTP_SW_STAT(ptp_bad_syncs, bad_syncs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) PTP_SW_STAT(ptp_sync_timeouts, sync_timeouts),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) PTP_SW_STAT(ptp_no_time_syncs, no_time_syncs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) PTP_SW_STAT(ptp_invalid_sync_windows, invalid_sync_windows),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) PTP_SW_STAT(ptp_undersize_sync_windows, undersize_sync_windows),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) PTP_SW_STAT(ptp_oversize_sync_windows, oversize_sync_windows),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) PTP_SW_STAT(ptp_rx_no_timestamp, rx_no_timestamp),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) PTP_MC_STAT(ptp_tx_timestamp_packets, TX),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) PTP_MC_STAT(ptp_rx_timestamp_packets, RX),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) PTP_MC_STAT(ptp_timestamp_packets, TS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) PTP_MC_STAT(ptp_filter_matches, FM),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) PTP_MC_STAT(ptp_non_filter_matches, NFM),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) #define PTP_STAT_COUNT ARRAY_SIZE(efx_ptp_stat_desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static const unsigned long efx_ptp_stat_mask[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) [0 ... BITS_TO_LONGS(PTP_STAT_COUNT) - 1] = ~0UL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) size_t efx_ptp_describe_stats(struct efx_nic *efx, u8 *strings)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (!efx->ptp_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) return efx_nic_describe_stats(efx_ptp_stat_desc, PTP_STAT_COUNT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) efx_ptp_stat_mask, strings);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) size_t efx_ptp_update_stats(struct efx_nic *efx, u64 *stats)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_STATUS_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_STATUS_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) size_t i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if (!efx->ptp_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) /* Copy software statistics */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) for (i = 0; i < PTP_STAT_COUNT; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (efx_ptp_stat_desc[i].dma_width)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) stats[i] = *(unsigned int *)((char *)efx->ptp_data +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) efx_ptp_stat_desc[i].offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) /* Fetch MC statistics. We *must* fill in all statistics or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * risk leaking kernel memory to userland, so if the MCDI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * request fails we pretend we got zeroes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) outbuf, sizeof(outbuf), NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) memset(outbuf, 0, sizeof(outbuf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) efx_nic_update_stats(efx_ptp_stat_desc, PTP_STAT_COUNT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) efx_ptp_stat_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) stats, _MCDI_PTR(outbuf, 0), false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) return PTP_STAT_COUNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) /* For Siena platforms NIC time is s and ns */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) static void efx_ptp_ns_to_s_ns(s64 ns, u32 *nic_major, u32 *nic_minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) struct timespec64 ts = ns_to_timespec64(ns);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) *nic_major = (u32)ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) *nic_minor = ts.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) static ktime_t efx_ptp_s_ns_to_ktime_correction(u32 nic_major, u32 nic_minor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) s32 correction)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) ktime_t kt = ktime_set(nic_major, nic_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (correction >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) kt = ktime_add_ns(kt, (u64)correction);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) kt = ktime_sub_ns(kt, (u64)-correction);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) return kt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) /* To convert from s27 format to ns we multiply then divide by a power of 2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) * For the conversion from ns to s27, the operation is also converted to a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) * multiply and shift.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) #define S27_TO_NS_SHIFT (27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) #define NS_TO_S27_MULT (((1ULL << 63) + NSEC_PER_SEC / 2) / NSEC_PER_SEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) #define NS_TO_S27_SHIFT (63 - S27_TO_NS_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) #define S27_MINOR_MAX (1 << S27_TO_NS_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) /* For Huntington platforms NIC time is in seconds and fractions of a second
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) * where the minor register only uses 27 bits in units of 2^-27s.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) static void efx_ptp_ns_to_s27(s64 ns, u32 *nic_major, u32 *nic_minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) struct timespec64 ts = ns_to_timespec64(ns);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) u32 maj = (u32)ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) u32 min = (u32)(((u64)ts.tv_nsec * NS_TO_S27_MULT +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) (1ULL << (NS_TO_S27_SHIFT - 1))) >> NS_TO_S27_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) /* The conversion can result in the minor value exceeding the maximum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) * In this case, round up to the next second.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) if (min >= S27_MINOR_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) min -= S27_MINOR_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) maj++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) *nic_major = maj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) *nic_minor = min;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) static inline ktime_t efx_ptp_s27_to_ktime(u32 nic_major, u32 nic_minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) u32 ns = (u32)(((u64)nic_minor * NSEC_PER_SEC +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) (1ULL << (S27_TO_NS_SHIFT - 1))) >> S27_TO_NS_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return ktime_set(nic_major, ns);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) static ktime_t efx_ptp_s27_to_ktime_correction(u32 nic_major, u32 nic_minor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) s32 correction)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) /* Apply the correction and deal with carry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) nic_minor += correction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if ((s32)nic_minor < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) nic_minor += S27_MINOR_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) nic_major--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) } else if (nic_minor >= S27_MINOR_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) nic_minor -= S27_MINOR_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) nic_major++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return efx_ptp_s27_to_ktime(nic_major, nic_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) /* For Medford2 platforms the time is in seconds and quarter nanoseconds. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) static void efx_ptp_ns_to_s_qns(s64 ns, u32 *nic_major, u32 *nic_minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) struct timespec64 ts = ns_to_timespec64(ns);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) *nic_major = (u32)ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) *nic_minor = ts.tv_nsec * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) static ktime_t efx_ptp_s_qns_to_ktime_correction(u32 nic_major, u32 nic_minor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) s32 correction)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) ktime_t kt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) nic_minor = DIV_ROUND_CLOSEST(nic_minor, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) correction = DIV_ROUND_CLOSEST(correction, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) kt = ktime_set(nic_major, nic_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (correction >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) kt = ktime_add_ns(kt, (u64)correction);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) kt = ktime_sub_ns(kt, (u64)-correction);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) return kt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) struct efx_channel *efx_ptp_channel(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) return efx->ptp_data ? efx->ptp_data->channel : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) static u32 last_sync_timestamp_major(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) struct efx_channel *channel = efx_ptp_channel(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) u32 major = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) if (channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) major = channel->sync_timestamp_major;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) return major;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) /* The 8000 series and later can provide the time from the MAC, which is only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) * 48 bits long and provides meta-information in the top 2 bits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) static ktime_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) efx_ptp_mac_nic_to_ktime_correction(struct efx_nic *efx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) struct efx_ptp_data *ptp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) u32 nic_major, u32 nic_minor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) s32 correction)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) u32 sync_timestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) ktime_t kt = { 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) s16 delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) if (!(nic_major & 0x80000000)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) WARN_ON_ONCE(nic_major >> 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) /* Medford provides 48 bits of timestamp, so we must get the top
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) * 16 bits from the timesync event state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) * We only have the lower 16 bits of the time now, but we do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) * have a full resolution timestamp at some point in past. As
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) * long as the difference between the (real) now and the sync
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) * is less than 2^15, then we can reconstruct the difference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * between those two numbers using only the lower 16 bits of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * each.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) * Put another way
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) * a - b = ((a mod k) - b) mod k
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) * when -k/2 < (a-b) < k/2. In our case k is 2^16. We know
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) * (a mod k) and b, so can calculate the delta, a - b.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) sync_timestamp = last_sync_timestamp_major(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) /* Because delta is s16 this does an implicit mask down to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) * 16 bits which is what we need, assuming
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) * MEDFORD_TX_SECS_EVENT_BITS is 16. delta is signed so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) * we can deal with the (unlikely) case of sync timestamps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) * arriving from the future.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) delta = nic_major - sync_timestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) /* Recover the fully specified time now, by applying the offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) * to the (fully specified) sync time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) nic_major = sync_timestamp + delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) kt = ptp->nic_to_kernel_time(nic_major, nic_minor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) correction);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return kt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) ktime_t efx_ptp_nic_to_kernel_time(struct efx_tx_queue *tx_queue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) struct efx_nic *efx = tx_queue->efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) ktime_t kt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) if (efx_ptp_use_mac_tx_timestamps(efx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) kt = efx_ptp_mac_nic_to_ktime_correction(efx, ptp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) tx_queue->completed_timestamp_major,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) tx_queue->completed_timestamp_minor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) ptp->ts_corrections.general_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) kt = ptp->nic_to_kernel_time(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) tx_queue->completed_timestamp_major,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) tx_queue->completed_timestamp_minor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) ptp->ts_corrections.general_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) return kt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) /* Get PTP attributes and set up time conversions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) static int efx_ptp_get_attributes(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_GET_ATTRIBUTES_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_GET_ATTRIBUTES_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) u32 fmt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) size_t out_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) /* Get the PTP attributes. If the NIC doesn't support the operation we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) * use the default format for compatibility with older NICs i.e.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) * seconds and nanoseconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_GET_ATTRIBUTES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) outbuf, sizeof(outbuf), &out_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) if (rc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) fmt = MCDI_DWORD(outbuf, PTP_OUT_GET_ATTRIBUTES_TIME_FORMAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) } else if (rc == -EINVAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) fmt = MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_NANOSECONDS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) } else if (rc == -EPERM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) pci_info(efx->pci_dev, "no PTP support\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) efx_mcdi_display_error(efx, MC_CMD_PTP, sizeof(inbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) outbuf, sizeof(outbuf), rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) switch (fmt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) case MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_27FRACTION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) ptp->ns_to_nic_time = efx_ptp_ns_to_s27;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) ptp->nic_to_kernel_time = efx_ptp_s27_to_ktime_correction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) ptp->nic_time.minor_max = 1 << 27;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) ptp->nic_time.sync_event_minor_shift = 19;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) case MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_NANOSECONDS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) ptp->ns_to_nic_time = efx_ptp_ns_to_s_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) ptp->nic_to_kernel_time = efx_ptp_s_ns_to_ktime_correction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) ptp->nic_time.minor_max = 1000000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) ptp->nic_time.sync_event_minor_shift = 22;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) case MC_CMD_PTP_OUT_GET_ATTRIBUTES_SECONDS_QTR_NANOSECONDS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) ptp->ns_to_nic_time = efx_ptp_ns_to_s_qns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) ptp->nic_to_kernel_time = efx_ptp_s_qns_to_ktime_correction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) ptp->nic_time.minor_max = 4000000000UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) ptp->nic_time.sync_event_minor_shift = 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) return -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) /* Precalculate acceptable difference between the minor time in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) * packet prefix and the last MCDI time sync event. We expect the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) * packet prefix timestamp to be after of sync event by up to one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) * sync event interval (0.25s) but we allow it to exceed this by a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) * fuzz factor of (0.1s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) ptp->nic_time.sync_event_diff_min = ptp->nic_time.minor_max
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) - (ptp->nic_time.minor_max / 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) ptp->nic_time.sync_event_diff_max = (ptp->nic_time.minor_max / 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) + (ptp->nic_time.minor_max / 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) /* MC_CMD_PTP_OP_GET_ATTRIBUTES has been extended twice from an older
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) * operation MC_CMD_PTP_OP_GET_TIME_FORMAT. The function now may return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) * a value to use for the minimum acceptable corrected synchronization
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) * window and may return further capabilities.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) * If we have the extra information store it. For older firmware that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) * does not implement the extended command use the default value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) if (rc == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) out_len >= MC_CMD_PTP_OUT_GET_ATTRIBUTES_CAPABILITIES_OFST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) ptp->min_synchronisation_ns =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) MCDI_DWORD(outbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) PTP_OUT_GET_ATTRIBUTES_SYNC_WINDOW_MIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) ptp->min_synchronisation_ns = DEFAULT_MIN_SYNCHRONISATION_NS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) if (rc == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) out_len >= MC_CMD_PTP_OUT_GET_ATTRIBUTES_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) ptp->capabilities = MCDI_DWORD(outbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) PTP_OUT_GET_ATTRIBUTES_CAPABILITIES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) ptp->capabilities = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) /* Set up the shift for conversion between frequency
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) * adjustments in parts-per-billion and the fixed-point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) * fractional ns format that the adapter uses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) if (ptp->capabilities & (1 << MC_CMD_PTP_OUT_GET_ATTRIBUTES_FP44_FREQ_ADJ_LBN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) ptp->adjfreq_ppb_shift = PPB_SHIFT_FP44;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) ptp->adjfreq_ppb_shift = PPB_SHIFT_FP40;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) /* Get PTP timestamp corrections */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) static int efx_ptp_get_timestamp_corrections(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_GET_TIMESTAMP_CORRECTIONS_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) size_t out_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) /* Get the timestamp corrections from the NIC. If this operation is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) * not supported (older NICs) then no correction is required.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) MCDI_SET_DWORD(inbuf, PTP_IN_OP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) MC_CMD_PTP_OP_GET_TIMESTAMP_CORRECTIONS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) outbuf, sizeof(outbuf), &out_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) if (rc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) efx->ptp_data->ts_corrections.ptp_tx = MCDI_DWORD(outbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) PTP_OUT_GET_TIMESTAMP_CORRECTIONS_TRANSMIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) efx->ptp_data->ts_corrections.ptp_rx = MCDI_DWORD(outbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) PTP_OUT_GET_TIMESTAMP_CORRECTIONS_RECEIVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) efx->ptp_data->ts_corrections.pps_out = MCDI_DWORD(outbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) PTP_OUT_GET_TIMESTAMP_CORRECTIONS_PPS_OUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) efx->ptp_data->ts_corrections.pps_in = MCDI_DWORD(outbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) PTP_OUT_GET_TIMESTAMP_CORRECTIONS_PPS_IN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) if (out_len >= MC_CMD_PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_LEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) efx->ptp_data->ts_corrections.general_tx = MCDI_DWORD(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) outbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_GENERAL_TX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) efx->ptp_data->ts_corrections.general_rx = MCDI_DWORD(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) outbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) PTP_OUT_GET_TIMESTAMP_CORRECTIONS_V2_GENERAL_RX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) efx->ptp_data->ts_corrections.general_tx =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) efx->ptp_data->ts_corrections.ptp_tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) efx->ptp_data->ts_corrections.general_rx =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) efx->ptp_data->ts_corrections.ptp_rx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) } else if (rc == -EINVAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) efx->ptp_data->ts_corrections.ptp_tx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) efx->ptp_data->ts_corrections.ptp_rx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) efx->ptp_data->ts_corrections.pps_out = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) efx->ptp_data->ts_corrections.pps_in = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) efx->ptp_data->ts_corrections.general_tx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) efx->ptp_data->ts_corrections.general_rx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) efx_mcdi_display_error(efx, MC_CMD_PTP, sizeof(inbuf), outbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) sizeof(outbuf), rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) /* Enable MCDI PTP support. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) static int efx_ptp_enable(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_ENABLE_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) MCDI_DECLARE_BUF_ERR(outbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ENABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_QUEUE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) efx->ptp_data->channel ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) efx->ptp_data->channel->channel : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_MODE, efx->ptp_data->mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) outbuf, sizeof(outbuf), NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) rc = (rc == -EALREADY) ? 0 : rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) efx_mcdi_display_error(efx, MC_CMD_PTP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) MC_CMD_PTP_IN_ENABLE_LEN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) outbuf, sizeof(outbuf), rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) /* Disable MCDI PTP support.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) * Note that this function should never rely on the presence of ptp_data -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) * may be called before that exists.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) static int efx_ptp_disable(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_DISABLE_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) MCDI_DECLARE_BUF_ERR(outbuf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_DISABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) outbuf, sizeof(outbuf), NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) rc = (rc == -EALREADY) ? 0 : rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) /* If we get ENOSYS, the NIC doesn't support PTP, and thus this function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) * should only have been called during probe.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) if (rc == -ENOSYS || rc == -EPERM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) pci_info(efx->pci_dev, "no PTP support\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) else if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) efx_mcdi_display_error(efx, MC_CMD_PTP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) MC_CMD_PTP_IN_DISABLE_LEN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) outbuf, sizeof(outbuf), rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) static void efx_ptp_deliver_rx_queue(struct sk_buff_head *q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) while ((skb = skb_dequeue(q))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) local_bh_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) netif_receive_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) local_bh_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) static void efx_ptp_handle_no_channel(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) netif_err(efx, drv, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) "ERROR: PTP requires MSI-X and 1 additional interrupt"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) "vector. PTP disabled\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) /* Repeatedly send the host time to the MC which will capture the hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) * time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) static void efx_ptp_send_times(struct efx_nic *efx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) struct pps_event_time *last_time)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) struct pps_event_time now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) struct timespec64 limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) int *mc_running = ptp->start.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) pps_get_ts(&now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) limit = now.ts_real;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) timespec64_add_ns(&limit, SYNCHRONISE_PERIOD_NS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) /* Write host time for specified period or until MC is done */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) while ((timespec64_compare(&now.ts_real, &limit) < 0) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) READ_ONCE(*mc_running)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) struct timespec64 update_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) unsigned int host_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) /* Don't update continuously to avoid saturating the PCIe bus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) update_time = now.ts_real;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) timespec64_add_ns(&update_time, SYNCHRONISATION_GRANULARITY_NS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) pps_get_ts(&now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) } while ((timespec64_compare(&now.ts_real, &update_time) < 0) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) READ_ONCE(*mc_running));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) /* Synchronise NIC with single word of time only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) host_time = (now.ts_real.tv_sec << MC_NANOSECOND_BITS |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) now.ts_real.tv_nsec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) /* Update host time in NIC memory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) efx->type->ptp_write_host_time(efx, host_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) *last_time = now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) /* Read a timeset from the MC's results and partial process. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) static void efx_ptp_read_timeset(MCDI_DECLARE_STRUCT_PTR(data),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) struct efx_ptp_timeset *timeset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) unsigned start_ns, end_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) timeset->host_start = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTSTART);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) timeset->major = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_MAJOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) timeset->minor = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_MINOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) timeset->host_end = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTEND),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) timeset->wait = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_WAITNS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) /* Ignore seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) start_ns = timeset->host_start & MC_NANOSECOND_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) end_ns = timeset->host_end & MC_NANOSECOND_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) /* Allow for rollover */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) if (end_ns < start_ns)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) end_ns += NSEC_PER_SEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) /* Determine duration of operation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) timeset->window = end_ns - start_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) /* Process times received from MC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) * Extract times from returned results, and establish the minimum value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) * seen. The minimum value represents the "best" possible time and events
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) * too much greater than this are rejected - the machine is, perhaps, too
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) * busy. A number of readings are taken so that, hopefully, at least one good
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) * synchronisation will be seen in the results.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) efx_ptp_process_times(struct efx_nic *efx, MCDI_DECLARE_STRUCT_PTR(synch_buf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) size_t response_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) const struct pps_event_time *last_time)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) unsigned number_readings =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) MCDI_VAR_ARRAY_LEN(response_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) PTP_OUT_SYNCHRONIZE_TIMESET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) unsigned i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) unsigned ngood = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) unsigned last_good = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) u32 last_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) u32 start_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) struct timespec64 delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) ktime_t mc_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) if (number_readings == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) /* Read the set of results and find the last good host-MC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) * synchronization result. The MC times when it finishes reading the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) * host time so the corrected window time should be fairly constant
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) * for a given platform. Increment stats for any results that appear
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) * to be erroneous.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) for (i = 0; i < number_readings; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) s32 window, corrected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) struct timespec64 wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) efx_ptp_read_timeset(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) MCDI_ARRAY_STRUCT_PTR(synch_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) PTP_OUT_SYNCHRONIZE_TIMESET, i),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) &ptp->timeset[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) wait = ktime_to_timespec64(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) ptp->nic_to_kernel_time(0, ptp->timeset[i].wait, 0));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) window = ptp->timeset[i].window;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) corrected = window - wait.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) /* We expect the uncorrected synchronization window to be at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) * least as large as the interval between host start and end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) * times. If it is smaller than this then this is mostly likely
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) * to be a consequence of the host's time being adjusted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) * Check that the corrected sync window is in a reasonable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) * range. If it is out of range it is likely to be because an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) * interrupt or other delay occurred between reading the system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) * time and writing it to MC memory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) if (window < SYNCHRONISATION_GRANULARITY_NS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) ++ptp->invalid_sync_windows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) } else if (corrected >= MAX_SYNCHRONISATION_NS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) ++ptp->oversize_sync_windows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) } else if (corrected < ptp->min_synchronisation_ns) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) ++ptp->undersize_sync_windows;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) ngood++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) last_good = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) if (ngood == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) netif_warn(efx, drv, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) "PTP no suitable synchronisations\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) /* Calculate delay from last good sync (host time) to last_time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) * It is possible that the seconds rolled over between taking
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) * the start reading and the last value written by the host. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) * timescales are such that a gap of more than one second is never
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) * expected. delta is *not* normalised.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) start_sec = ptp->timeset[last_good].host_start >> MC_NANOSECOND_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) last_sec = last_time->ts_real.tv_sec & MC_SECOND_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) if (start_sec != last_sec &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) ((start_sec + 1) & MC_SECOND_MASK) != last_sec) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) netif_warn(efx, hw, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) "PTP bad synchronisation seconds\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) delta.tv_sec = (last_sec - start_sec) & 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) delta.tv_nsec =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) last_time->ts_real.tv_nsec -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) (ptp->timeset[last_good].host_start & MC_NANOSECOND_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) /* Convert the NIC time at last good sync into kernel time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) * No correction is required - this time is the output of a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) * firmware process.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) mc_time = ptp->nic_to_kernel_time(ptp->timeset[last_good].major,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) ptp->timeset[last_good].minor, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) /* Calculate delay from NIC top of second to last_time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) delta.tv_nsec += ktime_to_timespec64(mc_time).tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) /* Set PPS timestamp to match NIC top of second */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) ptp->host_time_pps = *last_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) pps_sub_ts(&ptp->host_time_pps, delta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) /* Synchronize times between the host and the MC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) MCDI_DECLARE_BUF(synch_buf, MC_CMD_PTP_OUT_SYNCHRONIZE_LENMAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) size_t response_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) unsigned long timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) struct pps_event_time last_time = {};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) unsigned int loops = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) int *start = ptp->start.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) MCDI_SET_DWORD(synch_buf, PTP_IN_OP, MC_CMD_PTP_OP_SYNCHRONIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) MCDI_SET_DWORD(synch_buf, PTP_IN_PERIPH_ID, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_NUMTIMESETS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) num_readings);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) MCDI_SET_QWORD(synch_buf, PTP_IN_SYNCHRONIZE_START_ADDR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) ptp->start.dma_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) /* Clear flag that signals MC ready */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) WRITE_ONCE(*start, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) rc = efx_mcdi_rpc_start(efx, MC_CMD_PTP, synch_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) MC_CMD_PTP_IN_SYNCHRONIZE_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) EFX_WARN_ON_ONCE_PARANOID(rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) /* Wait for start from MCDI (or timeout) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) timeout = jiffies + msecs_to_jiffies(MAX_SYNCHRONISE_WAIT_MS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) while (!READ_ONCE(*start) && (time_before(jiffies, timeout))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) udelay(20); /* Usually start MCDI execution quickly */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) loops++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) if (loops <= 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) ++ptp->fast_syncs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) if (!time_before(jiffies, timeout))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) ++ptp->sync_timeouts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) if (READ_ONCE(*start))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) efx_ptp_send_times(efx, &last_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) /* Collect results */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) rc = efx_mcdi_rpc_finish(efx, MC_CMD_PTP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) MC_CMD_PTP_IN_SYNCHRONIZE_LEN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) synch_buf, sizeof(synch_buf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) &response_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) if (rc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) rc = efx_ptp_process_times(efx, synch_buf, response_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) &last_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) if (rc == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) ++ptp->good_syncs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) ++ptp->no_time_syncs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) /* Increment the bad syncs counter if the synchronize fails, whatever
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) * the reason.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) ++ptp->bad_syncs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) /* Transmit a PTP packet via the dedicated hardware timestamped queue. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) static void efx_ptp_xmit_skb_queue(struct efx_nic *efx, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) struct efx_ptp_data *ptp_data = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) u8 type = efx_tx_csum_type_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) struct efx_tx_queue *tx_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) tx_queue = efx_channel_get_tx_queue(ptp_data->channel, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) if (tx_queue && tx_queue->timestamping) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) efx_enqueue_skb(tx_queue, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) WARN_ONCE(1, "PTP channel has no timestamped tx queue\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) dev_kfree_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) /* Transmit a PTP packet, via the MCDI interface, to the wire. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) static void efx_ptp_xmit_skb_mc(struct efx_nic *efx, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) struct efx_ptp_data *ptp_data = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) struct skb_shared_hwtstamps timestamps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) int rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) MCDI_DECLARE_BUF(txtime, MC_CMD_PTP_OUT_TRANSMIT_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) MCDI_SET_DWORD(ptp_data->txbuf, PTP_IN_OP, MC_CMD_PTP_OP_TRANSMIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) MCDI_SET_DWORD(ptp_data->txbuf, PTP_IN_PERIPH_ID, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) MCDI_SET_DWORD(ptp_data->txbuf, PTP_IN_TRANSMIT_LENGTH, skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) if (skb_shinfo(skb)->nr_frags != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) rc = skb_linearize(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) if (skb->ip_summed == CHECKSUM_PARTIAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) rc = skb_checksum_help(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) skb_copy_from_linear_data(skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) MCDI_PTR(ptp_data->txbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) PTP_IN_TRANSMIT_PACKET),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) skb->len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) rc = efx_mcdi_rpc(efx, MC_CMD_PTP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) ptp_data->txbuf, MC_CMD_PTP_IN_TRANSMIT_LEN(skb->len),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) txtime, sizeof(txtime), &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) memset(×tamps, 0, sizeof(timestamps));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) timestamps.hwtstamp = ptp_data->nic_to_kernel_time(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_MAJOR),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_MINOR),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) ptp_data->ts_corrections.ptp_tx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) skb_tstamp_tx(skb, ×tamps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) dev_kfree_skb_any(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) static void efx_ptp_drop_time_expired_events(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) struct list_head *cursor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) struct list_head *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) if (ptp->rx_ts_inline)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) /* Drop time-expired events */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) spin_lock_bh(&ptp->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) list_for_each_safe(cursor, next, &ptp->evt_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) struct efx_ptp_event_rx *evt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) evt = list_entry(cursor, struct efx_ptp_event_rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) if (time_after(jiffies, evt->expiry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) list_move(&evt->link, &ptp->evt_free_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) netif_warn(efx, hw, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) "PTP rx event dropped\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) spin_unlock_bh(&ptp->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) static enum ptp_packet_state efx_ptp_match_rx(struct efx_nic *efx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) bool evts_waiting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) struct list_head *cursor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) struct list_head *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) struct efx_ptp_match *match;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) enum ptp_packet_state rc = PTP_PACKET_STATE_UNMATCHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) WARN_ON_ONCE(ptp->rx_ts_inline);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) spin_lock_bh(&ptp->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) evts_waiting = !list_empty(&ptp->evt_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) spin_unlock_bh(&ptp->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) if (!evts_waiting)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) return PTP_PACKET_STATE_UNMATCHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) match = (struct efx_ptp_match *)skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) /* Look for a matching timestamp in the event queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) spin_lock_bh(&ptp->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) list_for_each_safe(cursor, next, &ptp->evt_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) struct efx_ptp_event_rx *evt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) evt = list_entry(cursor, struct efx_ptp_event_rx, link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) if ((evt->seq0 == match->words[0]) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) (evt->seq1 == match->words[1])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) struct skb_shared_hwtstamps *timestamps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) /* Match - add in hardware timestamp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) timestamps = skb_hwtstamps(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) timestamps->hwtstamp = evt->hwtimestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) match->state = PTP_PACKET_STATE_MATCHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) rc = PTP_PACKET_STATE_MATCHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) list_move(&evt->link, &ptp->evt_free_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) spin_unlock_bh(&ptp->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) /* Process any queued receive events and corresponding packets
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) * q is returned with all the packets that are ready for delivery.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) static void efx_ptp_process_events(struct efx_nic *efx, struct sk_buff_head *q)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) while ((skb = skb_dequeue(&ptp->rxq))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) struct efx_ptp_match *match;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) match = (struct efx_ptp_match *)skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) if (match->state == PTP_PACKET_STATE_MATCH_UNWANTED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) __skb_queue_tail(q, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) } else if (efx_ptp_match_rx(efx, skb) ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) PTP_PACKET_STATE_MATCHED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) __skb_queue_tail(q, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) } else if (time_after(jiffies, match->expiry)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) match->state = PTP_PACKET_STATE_TIMED_OUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) ++ptp->rx_no_timestamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) __skb_queue_tail(q, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) /* Replace unprocessed entry and stop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) skb_queue_head(&ptp->rxq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) /* Complete processing of a received packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) static inline void efx_ptp_process_rx(struct efx_nic *efx, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) local_bh_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) netif_receive_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) local_bh_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) static void efx_ptp_remove_multicast_filters(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) if (ptp->rxfilter_installed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) ptp->rxfilter_general);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) ptp->rxfilter_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) ptp->rxfilter_installed = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) static int efx_ptp_insert_multicast_filters(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) struct efx_filter_spec rxfilter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) if (!ptp->channel || ptp->rxfilter_installed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) /* Must filter on both event and general ports to ensure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) * that there is no packet re-ordering.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) efx_filter_init_rx(&rxfilter, EFX_FILTER_PRI_REQUIRED, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) efx_rx_queue_index(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) efx_channel_get_rx_queue(ptp->channel)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) rc = efx_filter_set_ipv4_local(&rxfilter, IPPROTO_UDP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) htonl(PTP_ADDRESS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) htons(PTP_EVENT_PORT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) rc = efx_filter_insert_filter(efx, &rxfilter, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) ptp->rxfilter_event = rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) efx_filter_init_rx(&rxfilter, EFX_FILTER_PRI_REQUIRED, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) efx_rx_queue_index(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) efx_channel_get_rx_queue(ptp->channel)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) rc = efx_filter_set_ipv4_local(&rxfilter, IPPROTO_UDP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) htonl(PTP_ADDRESS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) htons(PTP_GENERAL_PORT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) rc = efx_filter_insert_filter(efx, &rxfilter, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) ptp->rxfilter_general = rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) ptp->rxfilter_installed = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) ptp->rxfilter_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) static int efx_ptp_start(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) ptp->reset_required = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) rc = efx_ptp_insert_multicast_filters(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) rc = efx_ptp_enable(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) ptp->evt_frag_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) ptp->current_adjfreq = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) efx_ptp_remove_multicast_filters(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) static int efx_ptp_stop(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) struct list_head *cursor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) struct list_head *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) if (ptp == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) rc = efx_ptp_disable(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) efx_ptp_remove_multicast_filters(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) /* Make sure RX packets are really delivered */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) efx_ptp_deliver_rx_queue(&efx->ptp_data->rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) skb_queue_purge(&efx->ptp_data->txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) /* Drop any pending receive events */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) spin_lock_bh(&efx->ptp_data->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) list_for_each_safe(cursor, next, &efx->ptp_data->evt_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) list_move(cursor, &efx->ptp_data->evt_free_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) spin_unlock_bh(&efx->ptp_data->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) static int efx_ptp_restart(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) if (efx->ptp_data && efx->ptp_data->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) return efx_ptp_start(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) static void efx_ptp_pps_worker(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) struct efx_ptp_data *ptp =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) container_of(work, struct efx_ptp_data, pps_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) struct efx_nic *efx = ptp->efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) struct ptp_clock_event ptp_evt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) if (efx_ptp_synchronize(efx, PTP_SYNC_ATTEMPTS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) ptp_evt.type = PTP_CLOCK_PPSUSR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) ptp_evt.pps_times = ptp->host_time_pps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) ptp_clock_event(ptp->phc_clock, &ptp_evt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) static void efx_ptp_worker(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) struct efx_ptp_data *ptp_data =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) container_of(work, struct efx_ptp_data, work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) struct efx_nic *efx = ptp_data->efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) struct sk_buff_head tempq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) if (ptp_data->reset_required) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) efx_ptp_stop(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) efx_ptp_start(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) efx_ptp_drop_time_expired_events(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) __skb_queue_head_init(&tempq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) efx_ptp_process_events(efx, &tempq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) while ((skb = skb_dequeue(&ptp_data->txq)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) ptp_data->xmit_skb(efx, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) while ((skb = __skb_dequeue(&tempq)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) efx_ptp_process_rx(efx, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) static const struct ptp_clock_info efx_phc_clock_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) .name = "sfc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) .max_adj = MAX_PPB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) .n_alarm = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) .n_ext_ts = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) .n_per_out = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) .n_pins = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) .pps = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) .adjfreq = efx_phc_adjfreq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) .adjtime = efx_phc_adjtime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) .gettime64 = efx_phc_gettime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) .settime64 = efx_phc_settime,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) .enable = efx_phc_enable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) /* Initialise PTP state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) int efx_ptp_probe(struct efx_nic *efx, struct efx_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) struct efx_ptp_data *ptp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) unsigned int pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) ptp = kzalloc(sizeof(struct efx_ptp_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) efx->ptp_data = ptp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) if (!efx->ptp_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) ptp->efx = efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) ptp->channel = channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) ptp->rx_ts_inline = efx_nic_rev(efx) >= EFX_REV_HUNT_A0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) rc = efx_nic_alloc_buffer(efx, &ptp->start, sizeof(int), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) goto fail1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) skb_queue_head_init(&ptp->rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) skb_queue_head_init(&ptp->txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) ptp->workwq = create_singlethread_workqueue("sfc_ptp");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) if (!ptp->workwq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) goto fail2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) if (efx_ptp_use_mac_tx_timestamps(efx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) ptp->xmit_skb = efx_ptp_xmit_skb_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) /* Request sync events on this channel. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) channel->sync_events_state = SYNC_EVENTS_QUIESCENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) ptp->xmit_skb = efx_ptp_xmit_skb_mc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) INIT_WORK(&ptp->work, efx_ptp_worker);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) ptp->config.flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) ptp->config.tx_type = HWTSTAMP_TX_OFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) ptp->config.rx_filter = HWTSTAMP_FILTER_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) INIT_LIST_HEAD(&ptp->evt_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) INIT_LIST_HEAD(&ptp->evt_free_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) spin_lock_init(&ptp->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) for (pos = 0; pos < MAX_RECEIVE_EVENTS; pos++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) list_add(&ptp->rx_evts[pos].link, &ptp->evt_free_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) /* Get the NIC PTP attributes and set up time conversions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) rc = efx_ptp_get_attributes(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) goto fail3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) /* Get the timestamp corrections */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) rc = efx_ptp_get_timestamp_corrections(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) goto fail3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) if (efx->mcdi->fn_flags &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_PRIMARY)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) ptp->phc_clock_info = efx_phc_clock_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) ptp->phc_clock = ptp_clock_register(&ptp->phc_clock_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) &efx->pci_dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) if (IS_ERR(ptp->phc_clock)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) rc = PTR_ERR(ptp->phc_clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) goto fail3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) } else if (ptp->phc_clock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) INIT_WORK(&ptp->pps_work, efx_ptp_pps_worker);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) ptp->pps_workwq = create_singlethread_workqueue("sfc_pps");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) if (!ptp->pps_workwq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) goto fail4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) ptp->nic_ts_enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) fail4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) ptp_clock_unregister(efx->ptp_data->phc_clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) fail3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) destroy_workqueue(efx->ptp_data->workwq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) fail2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) efx_nic_free_buffer(efx, &ptp->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) fail1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) kfree(efx->ptp_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) efx->ptp_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) /* Initialise PTP channel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) * Setting core_index to zero causes the queue to be initialised and doesn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) * overlap with 'rxq0' because ptp.c doesn't use skb_record_rx_queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) static int efx_ptp_probe_channel(struct efx_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) struct efx_nic *efx = channel->efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) channel->irq_moderation_us = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) channel->rx_queue.core_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) rc = efx_ptp_probe(efx, channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) /* Failure to probe PTP is not fatal; this channel will just not be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) * used for anything.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) * In the case of EPERM, efx_ptp_probe will print its own message (in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) * efx_ptp_get_attributes()), so we don't need to.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) if (rc && rc != -EPERM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) netif_warn(efx, drv, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) "Failed to probe PTP, rc=%d\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) void efx_ptp_remove(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) if (!efx->ptp_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) (void)efx_ptp_disable(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) cancel_work_sync(&efx->ptp_data->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) if (efx->ptp_data->pps_workwq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) cancel_work_sync(&efx->ptp_data->pps_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) skb_queue_purge(&efx->ptp_data->rxq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) skb_queue_purge(&efx->ptp_data->txq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) if (efx->ptp_data->phc_clock) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) destroy_workqueue(efx->ptp_data->pps_workwq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) ptp_clock_unregister(efx->ptp_data->phc_clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) destroy_workqueue(efx->ptp_data->workwq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) efx_nic_free_buffer(efx, &efx->ptp_data->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) kfree(efx->ptp_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) efx->ptp_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) static void efx_ptp_remove_channel(struct efx_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) efx_ptp_remove(channel->efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) static void efx_ptp_get_channel_name(struct efx_channel *channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) char *buf, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) snprintf(buf, len, "%s-ptp", channel->efx->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) /* Determine whether this packet should be processed by the PTP module
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) * or transmitted conventionally.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) return efx->ptp_data &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) efx->ptp_data->enabled &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) skb->len >= PTP_MIN_LENGTH &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) skb->len <= MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) likely(skb->protocol == htons(ETH_P_IP)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) skb_transport_header_was_set(skb) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) skb_network_header_len(skb) >= sizeof(struct iphdr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) ip_hdr(skb)->protocol == IPPROTO_UDP &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) skb_headlen(skb) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) skb_transport_offset(skb) + sizeof(struct udphdr) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) udp_hdr(skb)->dest == htons(PTP_EVENT_PORT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) /* Receive a PTP packet. Packets are queued until the arrival of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) * the receive timestamp from the MC - this will probably occur after the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) * packet arrival because of the processing in the MC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) static bool efx_ptp_rx(struct efx_channel *channel, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) struct efx_nic *efx = channel->efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) struct efx_ptp_match *match = (struct efx_ptp_match *)skb->cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) u8 *match_data_012, *match_data_345;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) unsigned int version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) u8 *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) match->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) /* Correct version? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) if (ptp->mode == MC_CMD_PTP_MODE_V1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) if (!pskb_may_pull(skb, PTP_V1_MIN_LENGTH)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) data = skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) version = ntohs(*(__be16 *)&data[PTP_V1_VERSION_OFFSET]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) if (version != PTP_VERSION_V1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) /* PTP V1 uses all six bytes of the UUID to match the packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) * to the timestamp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) match_data_012 = data + PTP_V1_UUID_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) match_data_345 = data + PTP_V1_UUID_OFFSET + 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) if (!pskb_may_pull(skb, PTP_V2_MIN_LENGTH)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) data = skb->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) version = data[PTP_V2_VERSION_OFFSET];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) if ((version & PTP_VERSION_V2_MASK) != PTP_VERSION_V2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) /* The original V2 implementation uses bytes 2-7 of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) * the UUID to match the packet to the timestamp. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) * discards two of the bytes of the MAC address used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) * to create the UUID (SF bug 33070). The PTP V2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) * enhanced mode fixes this issue and uses bytes 0-2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) * and byte 5-7 of the UUID.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) match_data_345 = data + PTP_V2_UUID_OFFSET + 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) if (ptp->mode == MC_CMD_PTP_MODE_V2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) match_data_012 = data + PTP_V2_UUID_OFFSET + 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) match_data_012 = data + PTP_V2_UUID_OFFSET + 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) BUG_ON(ptp->mode != MC_CMD_PTP_MODE_V2_ENHANCED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) /* Does this packet require timestamping? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) if (ntohs(*(__be16 *)&data[PTP_DPORT_OFFSET]) == PTP_EVENT_PORT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) match->state = PTP_PACKET_STATE_UNMATCHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) /* We expect the sequence number to be in the same position in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) * the packet for PTP V1 and V2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) BUILD_BUG_ON(PTP_V1_SEQUENCE_OFFSET != PTP_V2_SEQUENCE_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) BUILD_BUG_ON(PTP_V1_SEQUENCE_LENGTH != PTP_V2_SEQUENCE_LENGTH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) /* Extract UUID/Sequence information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) match->words[0] = (match_data_012[0] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) (match_data_012[1] << 8) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) (match_data_012[2] << 16) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) (match_data_345[0] << 24));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) match->words[1] = (match_data_345[1] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) (match_data_345[2] << 8) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) (data[PTP_V1_SEQUENCE_OFFSET +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) PTP_V1_SEQUENCE_LENGTH - 1] <<
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) 16));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) match->state = PTP_PACKET_STATE_MATCH_UNWANTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) skb_queue_tail(&ptp->rxq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) queue_work(ptp->workwq, &ptp->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) /* Transmit a PTP packet. This has to be transmitted by the MC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) * itself, through an MCDI call. MCDI calls aren't permitted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) * in the transmit path so defer the actual transmission to a suitable worker.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) skb_queue_tail(&ptp->txq, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) if ((udp_hdr(skb)->dest == htons(PTP_EVENT_PORT)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) (skb->len <= MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) efx_xmit_hwtstamp_pending(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) queue_work(ptp->workwq, &ptp->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) return NETDEV_TX_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) int efx_ptp_get_mode(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) return efx->ptp_data->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) unsigned int new_mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) if ((enable_wanted != efx->ptp_data->enabled) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) (enable_wanted && (efx->ptp_data->mode != new_mode))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) if (enable_wanted) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) /* Change of mode requires disable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) if (efx->ptp_data->enabled &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) (efx->ptp_data->mode != new_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) efx->ptp_data->enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) rc = efx_ptp_stop(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) /* Set new operating mode and establish
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) * baseline synchronisation, which must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) * succeed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) efx->ptp_data->mode = new_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) if (netif_running(efx->net_dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) rc = efx_ptp_start(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) if (rc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) rc = efx_ptp_synchronize(efx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) PTP_SYNC_ATTEMPTS * 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) efx_ptp_stop(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) rc = efx_ptp_stop(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) efx->ptp_data->enabled = enable_wanted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) static int efx_ptp_ts_init(struct efx_nic *efx, struct hwtstamp_config *init)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) if (init->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) if ((init->tx_type != HWTSTAMP_TX_OFF) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) (init->tx_type != HWTSTAMP_TX_ON))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) return -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) rc = efx->type->ptp_set_ts_config(efx, init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) efx->ptp_data->config = *init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) void efx_ptp_get_ts_info(struct efx_nic *efx, struct ethtool_ts_info *ts_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) struct efx_nic *primary = efx->primary;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) ASSERT_RTNL();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) if (!ptp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) ts_info->so_timestamping |= (SOF_TIMESTAMPING_TX_HARDWARE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) SOF_TIMESTAMPING_RX_HARDWARE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) SOF_TIMESTAMPING_RAW_HARDWARE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) /* Check licensed features. If we don't have the license for TX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) * timestamps, the NIC will not support them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) if (efx_ptp_use_mac_tx_timestamps(efx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) struct efx_ef10_nic_data *nic_data = efx->nic_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) if (!(nic_data->licensed_features &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) (1 << LICENSED_V3_FEATURES_TX_TIMESTAMPS_LBN)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) ts_info->so_timestamping &=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) ~SOF_TIMESTAMPING_TX_HARDWARE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) if (primary && primary->ptp_data && primary->ptp_data->phc_clock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) ts_info->phc_index =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) ptp_clock_index(primary->ptp_data->phc_clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) ts_info->tx_types = 1 << HWTSTAMP_TX_OFF | 1 << HWTSTAMP_TX_ON;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) ts_info->rx_filters = ptp->efx->type->hwtstamp_filters;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) int efx_ptp_set_ts_config(struct efx_nic *efx, struct ifreq *ifr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) struct hwtstamp_config config;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) /* Not a PTP enabled port */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) if (!efx->ptp_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) rc = efx_ptp_ts_init(efx, &config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) return copy_to_user(ifr->ifr_data, &config, sizeof(config))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) int efx_ptp_get_ts_config(struct efx_nic *efx, struct ifreq *ifr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) if (!efx->ptp_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) return copy_to_user(ifr->ifr_data, &efx->ptp_data->config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) sizeof(efx->ptp_data->config)) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) static void ptp_event_failure(struct efx_nic *efx, int expected_frag_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) netif_err(efx, hw, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) "PTP unexpected event length: got %d expected %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) ptp->evt_frag_idx, expected_frag_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) ptp->reset_required = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) queue_work(ptp->workwq, &ptp->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) /* Process a completed receive event. Put it on the event queue and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) * start worker thread. This is required because event and their
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) * correspoding packets may come in either order.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) static void ptp_event_rx(struct efx_nic *efx, struct efx_ptp_data *ptp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) struct efx_ptp_event_rx *evt = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) if (WARN_ON_ONCE(ptp->rx_ts_inline))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) if (ptp->evt_frag_idx != 3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) ptp_event_failure(efx, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) spin_lock_bh(&ptp->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) if (!list_empty(&ptp->evt_free_list)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) evt = list_first_entry(&ptp->evt_free_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) struct efx_ptp_event_rx, link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) list_del(&evt->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) evt->seq0 = EFX_QWORD_FIELD(ptp->evt_frags[2], MCDI_EVENT_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) evt->seq1 = (EFX_QWORD_FIELD(ptp->evt_frags[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) MCDI_EVENT_SRC) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) (EFX_QWORD_FIELD(ptp->evt_frags[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) MCDI_EVENT_SRC) << 8) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) (EFX_QWORD_FIELD(ptp->evt_frags[0],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) MCDI_EVENT_SRC) << 16));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) evt->hwtimestamp = efx->ptp_data->nic_to_kernel_time(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) EFX_QWORD_FIELD(ptp->evt_frags[1], MCDI_EVENT_DATA),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) ptp->ts_corrections.ptp_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) evt->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) list_add_tail(&evt->link, &ptp->evt_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) queue_work(ptp->workwq, &ptp->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891) } else if (net_ratelimit()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) /* Log a rate-limited warning message. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) netif_err(efx, rx_err, efx->net_dev, "PTP event queue overflow\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) spin_unlock_bh(&ptp->evt_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) static void ptp_event_fault(struct efx_nic *efx, struct efx_ptp_data *ptp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) int code = EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) if (ptp->evt_frag_idx != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) ptp_event_failure(efx, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) netif_err(efx, hw, efx->net_dev, "PTP error %d\n", code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) static void ptp_event_pps(struct efx_nic *efx, struct efx_ptp_data *ptp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) if (ptp->nic_ts_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) queue_work(ptp->pps_workwq, &ptp->pps_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) int code = EFX_QWORD_FIELD(*ev, MCDI_EVENT_CODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) if (!ptp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) if (!efx->ptp_warned) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) netif_warn(efx, drv, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) "Received PTP event but PTP not set up\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) efx->ptp_warned = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) if (!ptp->enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) if (ptp->evt_frag_idx == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) ptp->evt_code = code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) } else if (ptp->evt_code != code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) netif_err(efx, hw, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) "PTP out of sequence event %d\n", code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) ptp->evt_frag_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) ptp->evt_frags[ptp->evt_frag_idx++] = *ev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) if (!MCDI_EVENT_FIELD(*ev, CONT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) /* Process resulting event */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) switch (code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) case MCDI_EVENT_CODE_PTP_RX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) ptp_event_rx(efx, ptp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) case MCDI_EVENT_CODE_PTP_FAULT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) ptp_event_fault(efx, ptp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) case MCDI_EVENT_CODE_PTP_PPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) ptp_event_pps(efx, ptp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) netif_err(efx, hw, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) "PTP unknown event %d\n", code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) ptp->evt_frag_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) } else if (MAX_EVENT_FRAGS == ptp->evt_frag_idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) netif_err(efx, hw, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) "PTP too many event fragments\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) ptp->evt_frag_idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) void efx_time_sync_event(struct efx_channel *channel, efx_qword_t *ev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) struct efx_nic *efx = channel->efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) /* When extracting the sync timestamp minor value, we should discard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) * the least significant two bits. These are not required in order
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) * to reconstruct full-range timestamps and they are optionally used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) * to report status depending on the options supplied when subscribing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) * for sync events.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) channel->sync_timestamp_major = MCDI_EVENT_FIELD(*ev, PTP_TIME_MAJOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) channel->sync_timestamp_minor =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) (MCDI_EVENT_FIELD(*ev, PTP_TIME_MINOR_MS_8BITS) & 0xFC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) << ptp->nic_time.sync_event_minor_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) /* if sync events have been disabled then we want to silently ignore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) * this event, so throw away result.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) (void) cmpxchg(&channel->sync_events_state, SYNC_EVENTS_REQUESTED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) SYNC_EVENTS_VALID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) static inline u32 efx_rx_buf_timestamp_minor(struct efx_nic *efx, const u8 *eh)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) return __le32_to_cpup((const __le32 *)(eh + efx->rx_packet_ts_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) const u8 *data = eh + efx->rx_packet_ts_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) return (u32)data[0] |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) (u32)data[1] << 8 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) (u32)data[2] << 16 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) (u32)data[3] << 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) void __efx_rx_skb_attach_timestamp(struct efx_channel *channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) struct efx_nic *efx = channel->efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) struct efx_ptp_data *ptp = efx->ptp_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) u32 pkt_timestamp_major, pkt_timestamp_minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) u32 diff, carry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) struct skb_shared_hwtstamps *timestamps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) if (channel->sync_events_state != SYNC_EVENTS_VALID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) pkt_timestamp_minor = efx_rx_buf_timestamp_minor(efx, skb_mac_header(skb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) /* get the difference between the packet and sync timestamps,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) * modulo one second
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) diff = pkt_timestamp_minor - channel->sync_timestamp_minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) if (pkt_timestamp_minor < channel->sync_timestamp_minor)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) diff += ptp->nic_time.minor_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) /* do we roll over a second boundary and need to carry the one? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) carry = (channel->sync_timestamp_minor >= ptp->nic_time.minor_max - diff) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) if (diff <= ptp->nic_time.sync_event_diff_max) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) /* packet is ahead of the sync event by a quarter of a second or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) * less (allowing for fuzz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) pkt_timestamp_major = channel->sync_timestamp_major + carry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) } else if (diff >= ptp->nic_time.sync_event_diff_min) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) /* packet is behind the sync event but within the fuzz factor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) * This means the RX packet and sync event crossed as they were
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) * placed on the event queue, which can sometimes happen.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) pkt_timestamp_major = channel->sync_timestamp_major - 1 + carry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) /* it's outside tolerance in both directions. this might be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) * indicative of us missing sync events for some reason, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) * we'll call it an error rather than risk giving a bogus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) * timestamp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) netif_vdbg(efx, drv, efx->net_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) "packet timestamp %x too far from sync event %x:%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) pkt_timestamp_minor, channel->sync_timestamp_major,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) channel->sync_timestamp_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) /* attach the timestamps to the skb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) timestamps = skb_hwtstamps(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) timestamps->hwtstamp =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) ptp->nic_to_kernel_time(pkt_timestamp_major,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) pkt_timestamp_minor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) ptp->ts_corrections.general_rx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) struct efx_ptp_data *ptp_data = container_of(ptp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) struct efx_ptp_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) phc_clock_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) struct efx_nic *efx = ptp_data->efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) MCDI_DECLARE_BUF(inadj, MC_CMD_PTP_IN_ADJUST_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) s64 adjustment_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) if (delta > MAX_PPB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) delta = MAX_PPB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) else if (delta < -MAX_PPB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) delta = -MAX_PPB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) /* Convert ppb to fixed point ns taking care to round correctly. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) adjustment_ns = ((s64)delta * PPB_SCALE_WORD +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) (1 << (ptp_data->adjfreq_ppb_shift - 1))) >>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) ptp_data->adjfreq_ppb_shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) MCDI_SET_DWORD(inadj, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) MCDI_SET_DWORD(inadj, PTP_IN_PERIPH_ID, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) MCDI_SET_QWORD(inadj, PTP_IN_ADJUST_FREQ, adjustment_ns);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_SECONDS, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_NANOSECONDS, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inadj, sizeof(inadj),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) ptp_data->current_adjfreq = adjustment_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) u32 nic_major, nic_minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) struct efx_ptp_data *ptp_data = container_of(ptp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) struct efx_ptp_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) phc_clock_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) struct efx_nic *efx = ptp_data->efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_ADJUST_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) efx->ptp_data->ns_to_nic_time(delta, &nic_major, &nic_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) MCDI_SET_QWORD(inbuf, PTP_IN_ADJUST_FREQ, ptp_data->current_adjfreq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_MAJOR, nic_major);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_MINOR, nic_minor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113) static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) struct efx_ptp_data *ptp_data = container_of(ptp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) struct efx_ptp_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) phc_clock_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) struct efx_nic *efx = ptp_data->efx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119) MCDI_DECLARE_BUF(inbuf, MC_CMD_PTP_IN_READ_NIC_TIME_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) MCDI_DECLARE_BUF(outbuf, MC_CMD_PTP_OUT_READ_NIC_TIME_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) ktime_t kt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_READ_NIC_TIME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) MCDI_SET_DWORD(inbuf, PTP_IN_PERIPH_ID, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) outbuf, sizeof(outbuf), NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) kt = ptp_data->nic_to_kernel_time(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_MAJOR),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_MINOR), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) *ts = ktime_to_timespec64(kt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) static int efx_phc_settime(struct ptp_clock_info *ptp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) const struct timespec64 *e_ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142) /* Get the current NIC time, efx_phc_gettime.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) * Subtract from the desired time to get the offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) * call efx_phc_adjtime with the offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) struct timespec64 time_now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148) struct timespec64 delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) rc = efx_phc_gettime(ptp, &time_now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) delta = timespec64_sub(*e_ts, time_now);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) rc = efx_phc_adjtime(ptp, timespec64_to_ns(&delta));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) if (rc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) static int efx_phc_enable(struct ptp_clock_info *ptp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) struct ptp_clock_request *request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) int enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) struct efx_ptp_data *ptp_data = container_of(ptp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168) struct efx_ptp_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) phc_clock_info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) if (request->type != PTP_CLK_REQ_PPS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173) ptp_data->nic_ts_enabled = !!enable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177) static const struct efx_channel_type efx_ptp_channel_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178) .handle_no_channel = efx_ptp_handle_no_channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) .pre_probe = efx_ptp_probe_channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) .post_remove = efx_ptp_remove_channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181) .get_name = efx_ptp_get_channel_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) /* no copy operation; there is no need to reallocate this channel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) .receive_skb = efx_ptp_rx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184) .want_txqs = efx_ptp_want_txqs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) .keep_eventq = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188) void efx_ptp_defer_probe_with_channel(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190) /* Check whether PTP is implemented on this NIC. The DISABLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) * operation will succeed if and only if it is implemented.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193) if (efx_ptp_disable(efx) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) efx->extra_channel_type[EFX_EXTRA_CHANNEL_PTP] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195) &efx_ptp_channel_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198) void efx_ptp_start_datapath(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200) if (efx_ptp_restart(efx))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) netif_err(efx, drv, efx->net_dev, "Failed to restart PTP.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202) /* re-enable timestamping if it was previously enabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203) if (efx->type->ptp_set_ts_sync_events)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204) efx->type->ptp_set_ts_sync_events(efx, true, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207) void efx_ptp_stop_datapath(struct efx_nic *efx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) /* temporarily disable timestamping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210) if (efx->type->ptp_set_ts_sync_events)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211) efx->type->ptp_set_ts_sync_events(efx, false, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212) efx_ptp_stop(efx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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