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@@ -0,0 +1,1483 @@
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+/****************************************************************************
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+ * Driver for Solarflare Solarstorm network controllers and boards
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+ * Copyright 2011 Solarflare Communications Inc.
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License version 2 as published
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+ * by the Free Software Foundation, incorporated herein by reference.
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+ */
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+
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+/* Theory of operation:
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+ *
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+ * PTP support is assisted by firmware running on the MC, which provides
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+ * the hardware timestamping capabilities. Both transmitted and received
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+ * PTP event packets are queued onto internal queues for subsequent processing;
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+ * this is because the MC operations are relatively long and would block
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+ * block NAPI/interrupt operation.
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+ *
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+ * Receive event processing:
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+ * The event contains the packet's UUID and sequence number, together
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+ * with the hardware timestamp. The PTP receive packet queue is searched
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+ * for this UUID/sequence number and, if found, put on a pending queue.
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+ * Packets not matching are delivered without timestamps (MCDI events will
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+ * always arrive after the actual packet).
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+ * It is important for the operation of the PTP protocol that the ordering
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+ * of packets between the event and general port is maintained.
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+ *
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+ * Work queue processing:
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+ * If work waiting, synchronise host/hardware time
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+ *
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+ * Transmit: send packet through MC, which returns the transmission time
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+ * that is converted to an appropriate timestamp.
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+ *
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+ * Receive: the packet's reception time is converted to an appropriate
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+ * timestamp.
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+ */
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+#include <linux/ip.h>
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+#include <linux/udp.h>
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+#include <linux/time.h>
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+#include <linux/ktime.h>
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+#include <linux/module.h>
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+#include <linux/net_tstamp.h>
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+#include <linux/pps_kernel.h>
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+#include <linux/ptp_clock_kernel.h>
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+#include "net_driver.h"
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+#include "efx.h"
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+#include "mcdi.h"
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+#include "mcdi_pcol.h"
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+#include "io.h"
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+#include "regs.h"
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+#include "nic.h"
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+
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+/* Maximum number of events expected to make up a PTP event */
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+#define MAX_EVENT_FRAGS 3
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+
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+/* Maximum delay, ms, to begin synchronisation */
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+#define MAX_SYNCHRONISE_WAIT_MS 2
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+
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+/* How long, at most, to spend synchronising */
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+#define SYNCHRONISE_PERIOD_NS 250000
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+
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+/* How often to update the shared memory time */
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+#define SYNCHRONISATION_GRANULARITY_NS 200
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+
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+/* Minimum permitted length of a (corrected) synchronisation time */
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+#define MIN_SYNCHRONISATION_NS 120
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+
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+/* Maximum permitted length of a (corrected) synchronisation time */
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+#define MAX_SYNCHRONISATION_NS 1000
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+
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+/* How many (MC) receive events that can be queued */
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+#define MAX_RECEIVE_EVENTS 8
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+
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+/* Length of (modified) moving average. */
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+#define AVERAGE_LENGTH 16
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+
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+/* How long an unmatched event or packet can be held */
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+#define PKT_EVENT_LIFETIME_MS 10
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+
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+/* Offsets into PTP packet for identification. These offsets are from the
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+ * start of the IP header, not the MAC header. Note that neither PTP V1 nor
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+ * PTP V2 permit the use of IPV4 options.
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+ */
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+#define PTP_DPORT_OFFSET 22
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+
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+#define PTP_V1_VERSION_LENGTH 2
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+#define PTP_V1_VERSION_OFFSET 28
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+
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+#define PTP_V1_UUID_LENGTH 6
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+#define PTP_V1_UUID_OFFSET 50
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+
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+#define PTP_V1_SEQUENCE_LENGTH 2
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+#define PTP_V1_SEQUENCE_OFFSET 58
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+
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+/* The minimum length of a PTP V1 packet for offsets, etc. to be valid:
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+ * includes IP header.
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+ */
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+#define PTP_V1_MIN_LENGTH 64
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+
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+#define PTP_V2_VERSION_LENGTH 1
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+#define PTP_V2_VERSION_OFFSET 29
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+
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+/* Although PTP V2 UUIDs are comprised a ClockIdentity (8) and PortNumber (2),
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+ * the MC only captures the last six bytes of the clock identity. These values
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+ * reflect those, not the ones used in the standard. The standard permits
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+ * mapping of V1 UUIDs to V2 UUIDs with these same values.
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+ */
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+#define PTP_V2_MC_UUID_LENGTH 6
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+#define PTP_V2_MC_UUID_OFFSET 50
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+
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+#define PTP_V2_SEQUENCE_LENGTH 2
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+#define PTP_V2_SEQUENCE_OFFSET 58
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+
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+/* The minimum length of a PTP V2 packet for offsets, etc. to be valid:
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+ * includes IP header.
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+ */
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+#define PTP_V2_MIN_LENGTH 63
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+
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+#define PTP_MIN_LENGTH 63
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+
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+#define PTP_ADDRESS 0xe0000181 /* 224.0.1.129 */
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+#define PTP_EVENT_PORT 319
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+#define PTP_GENERAL_PORT 320
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+
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+/* Annoyingly the format of the version numbers are different between
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+ * versions 1 and 2 so it isn't possible to simply look for 1 or 2.
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+ */
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+#define PTP_VERSION_V1 1
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+
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+#define PTP_VERSION_V2 2
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+#define PTP_VERSION_V2_MASK 0x0f
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+
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+enum ptp_packet_state {
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+ PTP_PACKET_STATE_UNMATCHED = 0,
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+ PTP_PACKET_STATE_MATCHED,
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+ PTP_PACKET_STATE_TIMED_OUT,
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+ PTP_PACKET_STATE_MATCH_UNWANTED
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+};
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+
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+/* NIC synchronised with single word of time only comprising
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+ * partial seconds and full nanoseconds: 10^9 ~ 2^30 so 2 bits for seconds.
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+ */
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+#define MC_NANOSECOND_BITS 30
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+#define MC_NANOSECOND_MASK ((1 << MC_NANOSECOND_BITS) - 1)
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+#define MC_SECOND_MASK ((1 << (32 - MC_NANOSECOND_BITS)) - 1)
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+
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+/* Maximum parts-per-billion adjustment that is acceptable */
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+#define MAX_PPB 1000000
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+
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+/* Number of bits required to hold the above */
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+#define MAX_PPB_BITS 20
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+
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+/* Number of extra bits allowed when calculating fractional ns.
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+ * EXTRA_BITS + MC_CMD_PTP_IN_ADJUST_BITS + MAX_PPB_BITS should
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+ * be less than 63.
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+ */
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+#define PPB_EXTRA_BITS 2
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+
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+/* Precalculate scale word to avoid long long division at runtime */
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+#define PPB_SCALE_WORD ((1LL << (PPB_EXTRA_BITS + MC_CMD_PTP_IN_ADJUST_BITS +\
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+ MAX_PPB_BITS)) / 1000000000LL)
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+
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+#define PTP_SYNC_ATTEMPTS 4
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+
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+/**
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+ * struct efx_ptp_match - Matching structure, stored in sk_buff's cb area.
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+ * @words: UUID and (partial) sequence number
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+ * @expiry: Time after which the packet should be delivered irrespective of
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+ * event arrival.
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+ * @state: The state of the packet - whether it is ready for processing or
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+ * whether that is of no interest.
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+ */
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+struct efx_ptp_match {
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+ u32 words[DIV_ROUND_UP(PTP_V1_UUID_LENGTH, 4)];
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+ unsigned long expiry;
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+ enum ptp_packet_state state;
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+};
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+
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+/**
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+ * struct efx_ptp_event_rx - A PTP receive event (from MC)
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+ * @seq0: First part of (PTP) UUID
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+ * @seq1: Second part of (PTP) UUID and sequence number
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+ * @hwtimestamp: Event timestamp
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+ */
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+struct efx_ptp_event_rx {
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+ struct list_head link;
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+ u32 seq0;
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+ u32 seq1;
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+ ktime_t hwtimestamp;
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+ unsigned long expiry;
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+};
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+
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+/**
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+ * struct efx_ptp_timeset - Synchronisation between host and MC
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+ * @host_start: Host time immediately before hardware timestamp taken
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+ * @seconds: Hardware timestamp, seconds
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+ * @nanoseconds: Hardware timestamp, nanoseconds
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+ * @host_end: Host time immediately after hardware timestamp taken
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+ * @waitns: Number of nanoseconds between hardware timestamp being read and
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+ * host end time being seen
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+ * @window: Difference of host_end and host_start
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+ * @valid: Whether this timeset is valid
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+ */
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+struct efx_ptp_timeset {
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+ u32 host_start;
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+ u32 seconds;
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+ u32 nanoseconds;
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+ u32 host_end;
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+ u32 waitns;
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+ u32 window; /* Derived: end - start, allowing for wrap */
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+};
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+
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+/**
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+ * struct efx_ptp_data - Precision Time Protocol (PTP) state
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+ * @channel: The PTP channel
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+ * @rxq: Receive queue (awaiting timestamps)
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+ * @txq: Transmit queue
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+ * @evt_list: List of MC receive events awaiting packets
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+ * @evt_free_list: List of free events
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+ * @evt_lock: Lock for manipulating evt_list and evt_free_list
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+ * @rx_evts: Instantiated events (on evt_list and evt_free_list)
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+ * @workwq: Work queue for processing pending PTP operations
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+ * @work: Work task
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+ * @reset_required: A serious error has occurred and the PTP task needs to be
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+ * reset (disable, enable).
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+ * @rxfilter_event: Receive filter when operating
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+ * @rxfilter_general: Receive filter when operating
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+ * @config: Current timestamp configuration
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+ * @enabled: PTP operation enabled
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+ * @mode: Mode in which PTP operating (PTP version)
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+ * @evt_frags: Partly assembled PTP events
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+ * @evt_frag_idx: Current fragment number
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+ * @evt_code: Last event code
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+ * @start: Address at which MC indicates ready for synchronisation
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+ * @host_time_pps: Host time at last PPS
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+ * @last_sync_ns: Last number of nanoseconds between readings when synchronising
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+ * @base_sync_ns: Number of nanoseconds for last synchronisation.
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+ * @base_sync_valid: Whether base_sync_time is valid.
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+ * @current_adjfreq: Current ppb adjustment.
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+ * @phc_clock: Pointer to registered phc device
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+ * @phc_clock_info: Registration structure for phc device
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+ * @pps_work: pps work task for handling pps events
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+ * @pps_workwq: pps work queue
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+ * @nic_ts_enabled: Flag indicating if NIC generated TS events are handled
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+ * @txbuf: Buffer for use when transmitting (PTP) packets to MC (avoids
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+ * allocations in main data path).
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+ * @debug_ptp_dir: PTP debugfs directory
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+ * @missed_rx_sync: Number of packets received without syncrhonisation.
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+ * @good_syncs: Number of successful synchronisations.
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+ * @no_time_syncs: Number of synchronisations with no good times.
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+ * @bad_sync_durations: Number of synchronisations with bad durations.
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+ * @bad_syncs: Number of failed synchronisations.
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+ * @last_sync_time: Number of nanoseconds for last synchronisation.
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+ * @sync_timeouts: Number of synchronisation timeouts
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+ * @fast_syncs: Number of synchronisations requiring short delay
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+ * @min_sync_delta: Minimum time between event and synchronisation
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+ * @max_sync_delta: Maximum time between event and synchronisation
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+ * @average_sync_delta: Average time between event and synchronisation.
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+ * Modified moving average.
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+ * @last_sync_delta: Last time between event and synchronisation
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+ * @mc_stats: Context value for MC statistics
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+ * @timeset: Last set of synchronisation statistics.
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+ */
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+struct efx_ptp_data {
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+ struct efx_channel *channel;
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+ struct sk_buff_head rxq;
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+ struct sk_buff_head txq;
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+ struct list_head evt_list;
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+ struct list_head evt_free_list;
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+ spinlock_t evt_lock;
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+ struct efx_ptp_event_rx rx_evts[MAX_RECEIVE_EVENTS];
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+ struct workqueue_struct *workwq;
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+ struct work_struct work;
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+ bool reset_required;
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+ u32 rxfilter_event;
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+ u32 rxfilter_general;
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+ bool rxfilter_installed;
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+ struct hwtstamp_config config;
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+ bool enabled;
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+ unsigned int mode;
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+ efx_qword_t evt_frags[MAX_EVENT_FRAGS];
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+ int evt_frag_idx;
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+ int evt_code;
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+ struct efx_buffer start;
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+ struct pps_event_time host_time_pps;
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+ unsigned last_sync_ns;
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+ unsigned base_sync_ns;
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+ bool base_sync_valid;
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+ s64 current_adjfreq;
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+ struct ptp_clock *phc_clock;
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+ struct ptp_clock_info phc_clock_info;
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+ struct work_struct pps_work;
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+ struct workqueue_struct *pps_workwq;
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+ bool nic_ts_enabled;
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+ u8 txbuf[ALIGN(MC_CMD_PTP_IN_TRANSMIT_LEN(
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+ MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM), 4)];
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+ struct efx_ptp_timeset
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+ timeset[MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_MAXNUM];
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+};
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+
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+static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta);
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+static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta);
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+static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec *ts);
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+static int efx_phc_settime(struct ptp_clock_info *ptp,
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+ const struct timespec *e_ts);
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+static int efx_phc_enable(struct ptp_clock_info *ptp,
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+ struct ptp_clock_request *request, int on);
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+
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+/* Enable MCDI PTP support. */
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+static int efx_ptp_enable(struct efx_nic *efx)
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+{
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+ u8 inbuf[MC_CMD_PTP_IN_ENABLE_LEN];
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+
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+ MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ENABLE);
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+ MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_QUEUE,
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+ efx->ptp_data->channel->channel);
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+ MCDI_SET_DWORD(inbuf, PTP_IN_ENABLE_MODE, efx->ptp_data->mode);
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+
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+ return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
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+ NULL, 0, NULL);
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+}
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+
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+/* Disable MCDI PTP support.
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+ *
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+ * Note that this function should never rely on the presence of ptp_data -
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+ * may be called before that exists.
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+ */
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+static int efx_ptp_disable(struct efx_nic *efx)
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+{
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+ u8 inbuf[MC_CMD_PTP_IN_DISABLE_LEN];
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+
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+ MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_DISABLE);
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+ return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
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+ NULL, 0, NULL);
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+}
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+
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+static void efx_ptp_deliver_rx_queue(struct sk_buff_head *q)
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+{
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+ struct sk_buff *skb;
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+
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+ while ((skb = skb_dequeue(q))) {
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+ local_bh_disable();
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+ netif_receive_skb(skb);
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+ local_bh_enable();
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+ }
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+}
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+
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+static void efx_ptp_handle_no_channel(struct efx_nic *efx)
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+{
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+ netif_err(efx, drv, efx->net_dev,
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+ "ERROR: PTP requires MSI-X and 1 additional interrupt"
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+ "vector. PTP disabled\n");
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+}
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+
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+/* Repeatedly send the host time to the MC which will capture the hardware
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+ * time.
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+ */
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+static void efx_ptp_send_times(struct efx_nic *efx,
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+ struct pps_event_time *last_time)
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+{
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+ struct pps_event_time now;
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+ struct timespec limit;
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+ struct efx_ptp_data *ptp = efx->ptp_data;
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+ struct timespec start;
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+ int *mc_running = ptp->start.addr;
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+
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+ pps_get_ts(&now);
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+ start = now.ts_real;
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+ limit = now.ts_real;
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+ timespec_add_ns(&limit, SYNCHRONISE_PERIOD_NS);
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+
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+ /* Write host time for specified period or until MC is done */
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+ while ((timespec_compare(&now.ts_real, &limit) < 0) &&
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|
+ ACCESS_ONCE(*mc_running)) {
|
|
|
+ struct timespec update_time;
|
|
|
+ unsigned int host_time;
|
|
|
+
|
|
|
+ /* Don't update continuously to avoid saturating the PCIe bus */
|
|
|
+ update_time = now.ts_real;
|
|
|
+ timespec_add_ns(&update_time, SYNCHRONISATION_GRANULARITY_NS);
|
|
|
+ do {
|
|
|
+ pps_get_ts(&now);
|
|
|
+ } while ((timespec_compare(&now.ts_real, &update_time) < 0) &&
|
|
|
+ ACCESS_ONCE(*mc_running));
|
|
|
+
|
|
|
+ /* Synchronise NIC with single word of time only */
|
|
|
+ host_time = (now.ts_real.tv_sec << MC_NANOSECOND_BITS |
|
|
|
+ now.ts_real.tv_nsec);
|
|
|
+ /* Update host time in NIC memory */
|
|
|
+ _efx_writed(efx, cpu_to_le32(host_time),
|
|
|
+ FR_CZ_MC_TREG_SMEM + MC_SMEM_P0_PTP_TIME_OFST);
|
|
|
+ }
|
|
|
+ *last_time = now;
|
|
|
+}
|
|
|
+
|
|
|
+/* Read a timeset from the MC's results and partial process. */
|
|
|
+static void efx_ptp_read_timeset(u8 *data, struct efx_ptp_timeset *timeset)
|
|
|
+{
|
|
|
+ unsigned start_ns, end_ns;
|
|
|
+
|
|
|
+ timeset->host_start = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTSTART);
|
|
|
+ timeset->seconds = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_SECONDS);
|
|
|
+ timeset->nanoseconds = MCDI_DWORD(data,
|
|
|
+ PTP_OUT_SYNCHRONIZE_NANOSECONDS);
|
|
|
+ timeset->host_end = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_HOSTEND),
|
|
|
+ timeset->waitns = MCDI_DWORD(data, PTP_OUT_SYNCHRONIZE_WAITNS);
|
|
|
+
|
|
|
+ /* Ignore seconds */
|
|
|
+ start_ns = timeset->host_start & MC_NANOSECOND_MASK;
|
|
|
+ end_ns = timeset->host_end & MC_NANOSECOND_MASK;
|
|
|
+ /* Allow for rollover */
|
|
|
+ if (end_ns < start_ns)
|
|
|
+ end_ns += NSEC_PER_SEC;
|
|
|
+ /* Determine duration of operation */
|
|
|
+ timeset->window = end_ns - start_ns;
|
|
|
+}
|
|
|
+
|
|
|
+/* Process times received from MC.
|
|
|
+ *
|
|
|
+ * Extract times from returned results, and establish the minimum value
|
|
|
+ * seen. The minimum value represents the "best" possible time and events
|
|
|
+ * too much greater than this are rejected - the machine is, perhaps, too
|
|
|
+ * busy. A number of readings are taken so that, hopefully, at least one good
|
|
|
+ * synchronisation will be seen in the results.
|
|
|
+ */
|
|
|
+static int efx_ptp_process_times(struct efx_nic *efx, u8 *synch_buf,
|
|
|
+ size_t response_length,
|
|
|
+ const struct pps_event_time *last_time)
|
|
|
+{
|
|
|
+ unsigned number_readings = (response_length /
|
|
|
+ MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_LEN);
|
|
|
+ unsigned i;
|
|
|
+ unsigned min;
|
|
|
+ unsigned min_set = 0;
|
|
|
+ unsigned total;
|
|
|
+ unsigned ngood = 0;
|
|
|
+ unsigned last_good = 0;
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+ bool min_valid = false;
|
|
|
+ u32 last_sec;
|
|
|
+ u32 start_sec;
|
|
|
+ struct timespec delta;
|
|
|
+
|
|
|
+ if (number_readings == 0)
|
|
|
+ return -EAGAIN;
|
|
|
+
|
|
|
+ /* Find minimum value in this set of results, discarding clearly
|
|
|
+ * erroneous results.
|
|
|
+ */
|
|
|
+ for (i = 0; i < number_readings; i++) {
|
|
|
+ efx_ptp_read_timeset(synch_buf, &ptp->timeset[i]);
|
|
|
+ synch_buf += MC_CMD_PTP_OUT_SYNCHRONIZE_TIMESET_LEN;
|
|
|
+ if (ptp->timeset[i].window > SYNCHRONISATION_GRANULARITY_NS) {
|
|
|
+ if (min_valid) {
|
|
|
+ if (ptp->timeset[i].window < min_set)
|
|
|
+ min_set = ptp->timeset[i].window;
|
|
|
+ } else {
|
|
|
+ min_valid = true;
|
|
|
+ min_set = ptp->timeset[i].window;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (min_valid) {
|
|
|
+ if (ptp->base_sync_valid && (min_set > ptp->base_sync_ns))
|
|
|
+ min = ptp->base_sync_ns;
|
|
|
+ else
|
|
|
+ min = min_set;
|
|
|
+ } else {
|
|
|
+ min = SYNCHRONISATION_GRANULARITY_NS;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Discard excessively long synchronise durations. The MC times
|
|
|
+ * when it finishes reading the host time so the corrected window
|
|
|
+ * time should be fairly constant for a given platform.
|
|
|
+ */
|
|
|
+ total = 0;
|
|
|
+ for (i = 0; i < number_readings; i++)
|
|
|
+ if (ptp->timeset[i].window > ptp->timeset[i].waitns) {
|
|
|
+ unsigned win;
|
|
|
+
|
|
|
+ win = ptp->timeset[i].window - ptp->timeset[i].waitns;
|
|
|
+ if (win >= MIN_SYNCHRONISATION_NS &&
|
|
|
+ win < MAX_SYNCHRONISATION_NS) {
|
|
|
+ total += ptp->timeset[i].window;
|
|
|
+ ngood++;
|
|
|
+ last_good = i;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (ngood == 0) {
|
|
|
+ netif_warn(efx, drv, efx->net_dev,
|
|
|
+ "PTP no suitable synchronisations %dns %dns\n",
|
|
|
+ ptp->base_sync_ns, min_set);
|
|
|
+ return -EAGAIN;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Average minimum this synchronisation */
|
|
|
+ ptp->last_sync_ns = DIV_ROUND_UP(total, ngood);
|
|
|
+ if (!ptp->base_sync_valid || (ptp->last_sync_ns < ptp->base_sync_ns)) {
|
|
|
+ ptp->base_sync_valid = true;
|
|
|
+ ptp->base_sync_ns = ptp->last_sync_ns;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Calculate delay from actual PPS to last_time */
|
|
|
+ delta.tv_nsec =
|
|
|
+ ptp->timeset[last_good].nanoseconds +
|
|
|
+ last_time->ts_real.tv_nsec -
|
|
|
+ (ptp->timeset[last_good].host_start & MC_NANOSECOND_MASK);
|
|
|
+
|
|
|
+ /* It is possible that the seconds rolled over between taking
|
|
|
+ * the start reading and the last value written by the host. The
|
|
|
+ * timescales are such that a gap of more than one second is never
|
|
|
+ * expected.
|
|
|
+ */
|
|
|
+ start_sec = ptp->timeset[last_good].host_start >> MC_NANOSECOND_BITS;
|
|
|
+ last_sec = last_time->ts_real.tv_sec & MC_SECOND_MASK;
|
|
|
+ if (start_sec != last_sec) {
|
|
|
+ if (((start_sec + 1) & MC_SECOND_MASK) != last_sec) {
|
|
|
+ netif_warn(efx, hw, efx->net_dev,
|
|
|
+ "PTP bad synchronisation seconds\n");
|
|
|
+ return -EAGAIN;
|
|
|
+ } else {
|
|
|
+ delta.tv_sec = 1;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ delta.tv_sec = 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ ptp->host_time_pps = *last_time;
|
|
|
+ pps_sub_ts(&ptp->host_time_pps, delta);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/* Synchronize times between the host and the MC */
|
|
|
+static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+ u8 synch_buf[MC_CMD_PTP_OUT_SYNCHRONIZE_LENMAX];
|
|
|
+ size_t response_length;
|
|
|
+ int rc;
|
|
|
+ unsigned long timeout;
|
|
|
+ struct pps_event_time last_time = {};
|
|
|
+ unsigned int loops = 0;
|
|
|
+ int *start = ptp->start.addr;
|
|
|
+
|
|
|
+ MCDI_SET_DWORD(synch_buf, PTP_IN_OP, MC_CMD_PTP_OP_SYNCHRONIZE);
|
|
|
+ MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_NUMTIMESETS,
|
|
|
+ num_readings);
|
|
|
+ MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_START_ADDR_LO,
|
|
|
+ (u32)ptp->start.dma_addr);
|
|
|
+ MCDI_SET_DWORD(synch_buf, PTP_IN_SYNCHRONIZE_START_ADDR_HI,
|
|
|
+ (u32)((u64)ptp->start.dma_addr >> 32));
|
|
|
+
|
|
|
+ /* Clear flag that signals MC ready */
|
|
|
+ ACCESS_ONCE(*start) = 0;
|
|
|
+ efx_mcdi_rpc_start(efx, MC_CMD_PTP, synch_buf,
|
|
|
+ MC_CMD_PTP_IN_SYNCHRONIZE_LEN);
|
|
|
+
|
|
|
+ /* Wait for start from MCDI (or timeout) */
|
|
|
+ timeout = jiffies + msecs_to_jiffies(MAX_SYNCHRONISE_WAIT_MS);
|
|
|
+ while (!ACCESS_ONCE(*start) && (time_before(jiffies, timeout))) {
|
|
|
+ udelay(20); /* Usually start MCDI execution quickly */
|
|
|
+ loops++;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (ACCESS_ONCE(*start))
|
|
|
+ efx_ptp_send_times(efx, &last_time);
|
|
|
+
|
|
|
+ /* Collect results */
|
|
|
+ rc = efx_mcdi_rpc_finish(efx, MC_CMD_PTP,
|
|
|
+ MC_CMD_PTP_IN_SYNCHRONIZE_LEN,
|
|
|
+ synch_buf, sizeof(synch_buf),
|
|
|
+ &response_length);
|
|
|
+ if (rc == 0)
|
|
|
+ rc = efx_ptp_process_times(efx, synch_buf, response_length,
|
|
|
+ &last_time);
|
|
|
+
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+/* Transmit a PTP packet, via the MCDI interface, to the wire. */
|
|
|
+static int efx_ptp_xmit_skb(struct efx_nic *efx, struct sk_buff *skb)
|
|
|
+{
|
|
|
+ u8 *txbuf = efx->ptp_data->txbuf;
|
|
|
+ struct skb_shared_hwtstamps timestamps;
|
|
|
+ int rc = -EIO;
|
|
|
+ /* MCDI driver requires word aligned lengths */
|
|
|
+ size_t len = ALIGN(MC_CMD_PTP_IN_TRANSMIT_LEN(skb->len), 4);
|
|
|
+ u8 txtime[MC_CMD_PTP_OUT_TRANSMIT_LEN];
|
|
|
+
|
|
|
+ MCDI_SET_DWORD(txbuf, PTP_IN_OP, MC_CMD_PTP_OP_TRANSMIT);
|
|
|
+ MCDI_SET_DWORD(txbuf, PTP_IN_TRANSMIT_LENGTH, skb->len);
|
|
|
+ if (skb_shinfo(skb)->nr_frags != 0) {
|
|
|
+ rc = skb_linearize(skb);
|
|
|
+ if (rc != 0)
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
|
+ rc = skb_checksum_help(skb);
|
|
|
+ if (rc != 0)
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+ skb_copy_from_linear_data(skb,
|
|
|
+ &txbuf[MC_CMD_PTP_IN_TRANSMIT_PACKET_OFST],
|
|
|
+ len);
|
|
|
+ rc = efx_mcdi_rpc(efx, MC_CMD_PTP, txbuf, len, txtime,
|
|
|
+ sizeof(txtime), &len);
|
|
|
+ if (rc != 0)
|
|
|
+ goto fail;
|
|
|
+
|
|
|
+ memset(×tamps, 0, sizeof(timestamps));
|
|
|
+ timestamps.hwtstamp = ktime_set(
|
|
|
+ MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_SECONDS),
|
|
|
+ MCDI_DWORD(txtime, PTP_OUT_TRANSMIT_NANOSECONDS));
|
|
|
+
|
|
|
+ skb_tstamp_tx(skb, ×tamps);
|
|
|
+
|
|
|
+ rc = 0;
|
|
|
+
|
|
|
+fail:
|
|
|
+ dev_kfree_skb(skb);
|
|
|
+
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+static void efx_ptp_drop_time_expired_events(struct efx_nic *efx)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+ struct list_head *cursor;
|
|
|
+ struct list_head *next;
|
|
|
+
|
|
|
+ /* Drop time-expired events */
|
|
|
+ spin_lock_bh(&ptp->evt_lock);
|
|
|
+ if (!list_empty(&ptp->evt_list)) {
|
|
|
+ list_for_each_safe(cursor, next, &ptp->evt_list) {
|
|
|
+ struct efx_ptp_event_rx *evt;
|
|
|
+
|
|
|
+ evt = list_entry(cursor, struct efx_ptp_event_rx,
|
|
|
+ link);
|
|
|
+ if (time_after(jiffies, evt->expiry)) {
|
|
|
+ list_del(&evt->link);
|
|
|
+ list_add(&evt->link, &ptp->evt_free_list);
|
|
|
+ netif_warn(efx, hw, efx->net_dev,
|
|
|
+ "PTP rx event dropped\n");
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ spin_unlock_bh(&ptp->evt_lock);
|
|
|
+}
|
|
|
+
|
|
|
+static enum ptp_packet_state efx_ptp_match_rx(struct efx_nic *efx,
|
|
|
+ struct sk_buff *skb)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+ bool evts_waiting;
|
|
|
+ struct list_head *cursor;
|
|
|
+ struct list_head *next;
|
|
|
+ struct efx_ptp_match *match;
|
|
|
+ enum ptp_packet_state rc = PTP_PACKET_STATE_UNMATCHED;
|
|
|
+
|
|
|
+ spin_lock_bh(&ptp->evt_lock);
|
|
|
+ evts_waiting = !list_empty(&ptp->evt_list);
|
|
|
+ spin_unlock_bh(&ptp->evt_lock);
|
|
|
+
|
|
|
+ if (!evts_waiting)
|
|
|
+ return PTP_PACKET_STATE_UNMATCHED;
|
|
|
+
|
|
|
+ match = (struct efx_ptp_match *)skb->cb;
|
|
|
+ /* Look for a matching timestamp in the event queue */
|
|
|
+ spin_lock_bh(&ptp->evt_lock);
|
|
|
+ list_for_each_safe(cursor, next, &ptp->evt_list) {
|
|
|
+ struct efx_ptp_event_rx *evt;
|
|
|
+
|
|
|
+ evt = list_entry(cursor, struct efx_ptp_event_rx, link);
|
|
|
+ if ((evt->seq0 == match->words[0]) &&
|
|
|
+ (evt->seq1 == match->words[1])) {
|
|
|
+ struct skb_shared_hwtstamps *timestamps;
|
|
|
+
|
|
|
+ /* Match - add in hardware timestamp */
|
|
|
+ timestamps = skb_hwtstamps(skb);
|
|
|
+ timestamps->hwtstamp = evt->hwtimestamp;
|
|
|
+
|
|
|
+ match->state = PTP_PACKET_STATE_MATCHED;
|
|
|
+ rc = PTP_PACKET_STATE_MATCHED;
|
|
|
+ list_del(&evt->link);
|
|
|
+ list_add(&evt->link, &ptp->evt_free_list);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ spin_unlock_bh(&ptp->evt_lock);
|
|
|
+
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+/* Process any queued receive events and corresponding packets
|
|
|
+ *
|
|
|
+ * q is returned with all the packets that are ready for delivery.
|
|
|
+ * true is returned if at least one of those packets requires
|
|
|
+ * synchronisation.
|
|
|
+ */
|
|
|
+static bool efx_ptp_process_events(struct efx_nic *efx, struct sk_buff_head *q)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+ bool rc = false;
|
|
|
+ struct sk_buff *skb;
|
|
|
+
|
|
|
+ while ((skb = skb_dequeue(&ptp->rxq))) {
|
|
|
+ struct efx_ptp_match *match;
|
|
|
+
|
|
|
+ match = (struct efx_ptp_match *)skb->cb;
|
|
|
+ if (match->state == PTP_PACKET_STATE_MATCH_UNWANTED) {
|
|
|
+ __skb_queue_tail(q, skb);
|
|
|
+ } else if (efx_ptp_match_rx(efx, skb) ==
|
|
|
+ PTP_PACKET_STATE_MATCHED) {
|
|
|
+ rc = true;
|
|
|
+ __skb_queue_tail(q, skb);
|
|
|
+ } else if (time_after(jiffies, match->expiry)) {
|
|
|
+ match->state = PTP_PACKET_STATE_TIMED_OUT;
|
|
|
+ netif_warn(efx, rx_err, efx->net_dev,
|
|
|
+ "PTP packet - no timestamp seen\n");
|
|
|
+ __skb_queue_tail(q, skb);
|
|
|
+ } else {
|
|
|
+ /* Replace unprocessed entry and stop */
|
|
|
+ skb_queue_head(&ptp->rxq, skb);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+/* Complete processing of a received packet */
|
|
|
+static inline void efx_ptp_process_rx(struct efx_nic *efx, struct sk_buff *skb)
|
|
|
+{
|
|
|
+ local_bh_disable();
|
|
|
+ netif_receive_skb(skb);
|
|
|
+ local_bh_enable();
|
|
|
+}
|
|
|
+
|
|
|
+static int efx_ptp_start(struct efx_nic *efx)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+ struct efx_filter_spec rxfilter;
|
|
|
+ int rc;
|
|
|
+
|
|
|
+ ptp->reset_required = false;
|
|
|
+
|
|
|
+ /* Must filter on both event and general ports to ensure
|
|
|
+ * that there is no packet re-ordering.
|
|
|
+ */
|
|
|
+ efx_filter_init_rx(&rxfilter, EFX_FILTER_PRI_REQUIRED, 0,
|
|
|
+ efx_rx_queue_index(
|
|
|
+ efx_channel_get_rx_queue(ptp->channel)));
|
|
|
+ rc = efx_filter_set_ipv4_local(&rxfilter, IPPROTO_UDP,
|
|
|
+ htonl(PTP_ADDRESS),
|
|
|
+ htons(PTP_EVENT_PORT));
|
|
|
+ if (rc != 0)
|
|
|
+ return rc;
|
|
|
+
|
|
|
+ rc = efx_filter_insert_filter(efx, &rxfilter, true);
|
|
|
+ if (rc < 0)
|
|
|
+ return rc;
|
|
|
+ ptp->rxfilter_event = rc;
|
|
|
+
|
|
|
+ efx_filter_init_rx(&rxfilter, EFX_FILTER_PRI_REQUIRED, 0,
|
|
|
+ efx_rx_queue_index(
|
|
|
+ efx_channel_get_rx_queue(ptp->channel)));
|
|
|
+ rc = efx_filter_set_ipv4_local(&rxfilter, IPPROTO_UDP,
|
|
|
+ htonl(PTP_ADDRESS),
|
|
|
+ htons(PTP_GENERAL_PORT));
|
|
|
+ if (rc != 0)
|
|
|
+ goto fail;
|
|
|
+
|
|
|
+ rc = efx_filter_insert_filter(efx, &rxfilter, true);
|
|
|
+ if (rc < 0)
|
|
|
+ goto fail;
|
|
|
+ ptp->rxfilter_general = rc;
|
|
|
+
|
|
|
+ rc = efx_ptp_enable(efx);
|
|
|
+ if (rc != 0)
|
|
|
+ goto fail2;
|
|
|
+
|
|
|
+ ptp->evt_frag_idx = 0;
|
|
|
+ ptp->current_adjfreq = 0;
|
|
|
+ ptp->rxfilter_installed = true;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+
|
|
|
+fail2:
|
|
|
+ efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
|
|
|
+ ptp->rxfilter_general);
|
|
|
+fail:
|
|
|
+ efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
|
|
|
+ ptp->rxfilter_event);
|
|
|
+
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+static int efx_ptp_stop(struct efx_nic *efx)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+ int rc = efx_ptp_disable(efx);
|
|
|
+ struct list_head *cursor;
|
|
|
+ struct list_head *next;
|
|
|
+
|
|
|
+ if (ptp->rxfilter_installed) {
|
|
|
+ efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
|
|
|
+ ptp->rxfilter_general);
|
|
|
+ efx_filter_remove_id_safe(efx, EFX_FILTER_PRI_REQUIRED,
|
|
|
+ ptp->rxfilter_event);
|
|
|
+ ptp->rxfilter_installed = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Make sure RX packets are really delivered */
|
|
|
+ efx_ptp_deliver_rx_queue(&efx->ptp_data->rxq);
|
|
|
+ skb_queue_purge(&efx->ptp_data->txq);
|
|
|
+
|
|
|
+ /* Drop any pending receive events */
|
|
|
+ spin_lock_bh(&efx->ptp_data->evt_lock);
|
|
|
+ list_for_each_safe(cursor, next, &efx->ptp_data->evt_list) {
|
|
|
+ list_del(cursor);
|
|
|
+ list_add(cursor, &efx->ptp_data->evt_free_list);
|
|
|
+ }
|
|
|
+ spin_unlock_bh(&efx->ptp_data->evt_lock);
|
|
|
+
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+static void efx_ptp_pps_worker(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp =
|
|
|
+ container_of(work, struct efx_ptp_data, pps_work);
|
|
|
+ struct efx_nic *efx = ptp->channel->efx;
|
|
|
+ struct ptp_clock_event ptp_evt;
|
|
|
+
|
|
|
+ if (efx_ptp_synchronize(efx, PTP_SYNC_ATTEMPTS))
|
|
|
+ return;
|
|
|
+
|
|
|
+ ptp_evt.type = PTP_CLOCK_PPSUSR;
|
|
|
+ ptp_evt.pps_times = ptp->host_time_pps;
|
|
|
+ ptp_clock_event(ptp->phc_clock, &ptp_evt);
|
|
|
+}
|
|
|
+
|
|
|
+/* Process any pending transmissions and timestamp any received packets.
|
|
|
+ */
|
|
|
+static void efx_ptp_worker(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp_data =
|
|
|
+ container_of(work, struct efx_ptp_data, work);
|
|
|
+ struct efx_nic *efx = ptp_data->channel->efx;
|
|
|
+ struct sk_buff *skb;
|
|
|
+ struct sk_buff_head tempq;
|
|
|
+
|
|
|
+ if (ptp_data->reset_required) {
|
|
|
+ efx_ptp_stop(efx);
|
|
|
+ efx_ptp_start(efx);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ efx_ptp_drop_time_expired_events(efx);
|
|
|
+
|
|
|
+ __skb_queue_head_init(&tempq);
|
|
|
+ if (efx_ptp_process_events(efx, &tempq) ||
|
|
|
+ !skb_queue_empty(&ptp_data->txq)) {
|
|
|
+
|
|
|
+ while ((skb = skb_dequeue(&ptp_data->txq)))
|
|
|
+ efx_ptp_xmit_skb(efx, skb);
|
|
|
+ }
|
|
|
+
|
|
|
+ while ((skb = __skb_dequeue(&tempq)))
|
|
|
+ efx_ptp_process_rx(efx, skb);
|
|
|
+}
|
|
|
+
|
|
|
+/* Initialise PTP channel and state.
|
|
|
+ *
|
|
|
+ * Setting core_index to zero causes the queue to be initialised and doesn't
|
|
|
+ * overlap with 'rxq0' because ptp.c doesn't use skb_record_rx_queue.
|
|
|
+ */
|
|
|
+static int efx_ptp_probe_channel(struct efx_channel *channel)
|
|
|
+{
|
|
|
+ struct efx_nic *efx = channel->efx;
|
|
|
+ struct efx_ptp_data *ptp;
|
|
|
+ int rc = 0;
|
|
|
+ unsigned int pos;
|
|
|
+
|
|
|
+ channel->irq_moderation = 0;
|
|
|
+ channel->rx_queue.core_index = 0;
|
|
|
+
|
|
|
+ ptp = kzalloc(sizeof(struct efx_ptp_data), GFP_KERNEL);
|
|
|
+ efx->ptp_data = ptp;
|
|
|
+ if (!efx->ptp_data)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ rc = efx_nic_alloc_buffer(efx, &ptp->start, sizeof(int));
|
|
|
+ if (rc != 0)
|
|
|
+ goto fail1;
|
|
|
+
|
|
|
+ ptp->channel = channel;
|
|
|
+ skb_queue_head_init(&ptp->rxq);
|
|
|
+ skb_queue_head_init(&ptp->txq);
|
|
|
+ ptp->workwq = create_singlethread_workqueue("sfc_ptp");
|
|
|
+ if (!ptp->workwq) {
|
|
|
+ rc = -ENOMEM;
|
|
|
+ goto fail2;
|
|
|
+ }
|
|
|
+
|
|
|
+ INIT_WORK(&ptp->work, efx_ptp_worker);
|
|
|
+ ptp->config.flags = 0;
|
|
|
+ ptp->config.tx_type = HWTSTAMP_TX_OFF;
|
|
|
+ ptp->config.rx_filter = HWTSTAMP_FILTER_NONE;
|
|
|
+ INIT_LIST_HEAD(&ptp->evt_list);
|
|
|
+ INIT_LIST_HEAD(&ptp->evt_free_list);
|
|
|
+ spin_lock_init(&ptp->evt_lock);
|
|
|
+ for (pos = 0; pos < MAX_RECEIVE_EVENTS; pos++)
|
|
|
+ list_add(&ptp->rx_evts[pos].link, &ptp->evt_free_list);
|
|
|
+
|
|
|
+ ptp->phc_clock_info.owner = THIS_MODULE;
|
|
|
+ snprintf(ptp->phc_clock_info.name,
|
|
|
+ sizeof(ptp->phc_clock_info.name),
|
|
|
+ "%pm", efx->net_dev->perm_addr);
|
|
|
+ ptp->phc_clock_info.max_adj = MAX_PPB;
|
|
|
+ ptp->phc_clock_info.n_alarm = 0;
|
|
|
+ ptp->phc_clock_info.n_ext_ts = 0;
|
|
|
+ ptp->phc_clock_info.n_per_out = 0;
|
|
|
+ ptp->phc_clock_info.pps = 1;
|
|
|
+ ptp->phc_clock_info.adjfreq = efx_phc_adjfreq;
|
|
|
+ ptp->phc_clock_info.adjtime = efx_phc_adjtime;
|
|
|
+ ptp->phc_clock_info.gettime = efx_phc_gettime;
|
|
|
+ ptp->phc_clock_info.settime = efx_phc_settime;
|
|
|
+ ptp->phc_clock_info.enable = efx_phc_enable;
|
|
|
+
|
|
|
+ ptp->phc_clock = ptp_clock_register(&ptp->phc_clock_info);
|
|
|
+ if (!ptp->phc_clock)
|
|
|
+ goto fail3;
|
|
|
+
|
|
|
+ INIT_WORK(&ptp->pps_work, efx_ptp_pps_worker);
|
|
|
+ ptp->pps_workwq = create_singlethread_workqueue("sfc_pps");
|
|
|
+ if (!ptp->pps_workwq) {
|
|
|
+ rc = -ENOMEM;
|
|
|
+ goto fail4;
|
|
|
+ }
|
|
|
+ ptp->nic_ts_enabled = false;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+fail4:
|
|
|
+ ptp_clock_unregister(efx->ptp_data->phc_clock);
|
|
|
+
|
|
|
+fail3:
|
|
|
+ destroy_workqueue(efx->ptp_data->workwq);
|
|
|
+
|
|
|
+fail2:
|
|
|
+ efx_nic_free_buffer(efx, &ptp->start);
|
|
|
+
|
|
|
+fail1:
|
|
|
+ kfree(efx->ptp_data);
|
|
|
+ efx->ptp_data = NULL;
|
|
|
+
|
|
|
+ return rc;
|
|
|
+}
|
|
|
+
|
|
|
+static void efx_ptp_remove_channel(struct efx_channel *channel)
|
|
|
+{
|
|
|
+ struct efx_nic *efx = channel->efx;
|
|
|
+
|
|
|
+ if (!efx->ptp_data)
|
|
|
+ return;
|
|
|
+
|
|
|
+ (void)efx_ptp_disable(channel->efx);
|
|
|
+
|
|
|
+ cancel_work_sync(&efx->ptp_data->work);
|
|
|
+ cancel_work_sync(&efx->ptp_data->pps_work);
|
|
|
+
|
|
|
+ skb_queue_purge(&efx->ptp_data->rxq);
|
|
|
+ skb_queue_purge(&efx->ptp_data->txq);
|
|
|
+
|
|
|
+ ptp_clock_unregister(efx->ptp_data->phc_clock);
|
|
|
+
|
|
|
+ destroy_workqueue(efx->ptp_data->workwq);
|
|
|
+ destroy_workqueue(efx->ptp_data->pps_workwq);
|
|
|
+
|
|
|
+ efx_nic_free_buffer(efx, &efx->ptp_data->start);
|
|
|
+ kfree(efx->ptp_data);
|
|
|
+}
|
|
|
+
|
|
|
+static void efx_ptp_get_channel_name(struct efx_channel *channel,
|
|
|
+ char *buf, size_t len)
|
|
|
+{
|
|
|
+ snprintf(buf, len, "%s-ptp", channel->efx->name);
|
|
|
+}
|
|
|
+
|
|
|
+/* Determine whether this packet should be processed by the PTP module
|
|
|
+ * or transmitted conventionally.
|
|
|
+ */
|
|
|
+bool efx_ptp_is_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
|
|
|
+{
|
|
|
+ return efx->ptp_data &&
|
|
|
+ efx->ptp_data->enabled &&
|
|
|
+ skb->len >= PTP_MIN_LENGTH &&
|
|
|
+ skb->len <= MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM &&
|
|
|
+ likely(skb->protocol == htons(ETH_P_IP)) &&
|
|
|
+ ip_hdr(skb)->protocol == IPPROTO_UDP &&
|
|
|
+ udp_hdr(skb)->dest == htons(PTP_EVENT_PORT);
|
|
|
+}
|
|
|
+
|
|
|
+/* Receive a PTP packet. Packets are queued until the arrival of
|
|
|
+ * the receive timestamp from the MC - this will probably occur after the
|
|
|
+ * packet arrival because of the processing in the MC.
|
|
|
+ */
|
|
|
+static void efx_ptp_rx(struct efx_channel *channel, struct sk_buff *skb)
|
|
|
+{
|
|
|
+ struct efx_nic *efx = channel->efx;
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+ struct efx_ptp_match *match = (struct efx_ptp_match *)skb->cb;
|
|
|
+ u8 *data;
|
|
|
+ unsigned int version;
|
|
|
+
|
|
|
+ match->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS);
|
|
|
+
|
|
|
+ /* Correct version? */
|
|
|
+ if (ptp->mode == MC_CMD_PTP_MODE_V1) {
|
|
|
+ if (skb->len < PTP_V1_MIN_LENGTH) {
|
|
|
+ netif_receive_skb(skb);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ version = ntohs(*(__be16 *)&skb->data[PTP_V1_VERSION_OFFSET]);
|
|
|
+ if (version != PTP_VERSION_V1) {
|
|
|
+ netif_receive_skb(skb);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ if (skb->len < PTP_V2_MIN_LENGTH) {
|
|
|
+ netif_receive_skb(skb);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ version = skb->data[PTP_V2_VERSION_OFFSET];
|
|
|
+
|
|
|
+ BUG_ON(ptp->mode != MC_CMD_PTP_MODE_V2);
|
|
|
+ BUILD_BUG_ON(PTP_V1_UUID_OFFSET != PTP_V2_MC_UUID_OFFSET);
|
|
|
+ BUILD_BUG_ON(PTP_V1_UUID_LENGTH != PTP_V2_MC_UUID_LENGTH);
|
|
|
+ BUILD_BUG_ON(PTP_V1_SEQUENCE_OFFSET != PTP_V2_SEQUENCE_OFFSET);
|
|
|
+ BUILD_BUG_ON(PTP_V1_SEQUENCE_LENGTH != PTP_V2_SEQUENCE_LENGTH);
|
|
|
+
|
|
|
+ if ((version & PTP_VERSION_V2_MASK) != PTP_VERSION_V2) {
|
|
|
+ netif_receive_skb(skb);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Does this packet require timestamping? */
|
|
|
+ if (ntohs(*(__be16 *)&skb->data[PTP_DPORT_OFFSET]) == PTP_EVENT_PORT) {
|
|
|
+ struct skb_shared_hwtstamps *timestamps;
|
|
|
+
|
|
|
+ match->state = PTP_PACKET_STATE_UNMATCHED;
|
|
|
+
|
|
|
+ /* Clear all timestamps held: filled in later */
|
|
|
+ timestamps = skb_hwtstamps(skb);
|
|
|
+ memset(timestamps, 0, sizeof(*timestamps));
|
|
|
+
|
|
|
+ /* Extract UUID/Sequence information */
|
|
|
+ data = skb->data + PTP_V1_UUID_OFFSET;
|
|
|
+ match->words[0] = (data[0] |
|
|
|
+ (data[1] << 8) |
|
|
|
+ (data[2] << 16) |
|
|
|
+ (data[3] << 24));
|
|
|
+ match->words[1] = (data[4] |
|
|
|
+ (data[5] << 8) |
|
|
|
+ (skb->data[PTP_V1_SEQUENCE_OFFSET +
|
|
|
+ PTP_V1_SEQUENCE_LENGTH - 1] <<
|
|
|
+ 16));
|
|
|
+ } else {
|
|
|
+ match->state = PTP_PACKET_STATE_MATCH_UNWANTED;
|
|
|
+ }
|
|
|
+
|
|
|
+ skb_queue_tail(&ptp->rxq, skb);
|
|
|
+ queue_work(ptp->workwq, &ptp->work);
|
|
|
+}
|
|
|
+
|
|
|
+/* Transmit a PTP packet. This has to be transmitted by the MC
|
|
|
+ * itself, through an MCDI call. MCDI calls aren't permitted
|
|
|
+ * in the transmit path so defer the actual transmission to a suitable worker.
|
|
|
+ */
|
|
|
+int efx_ptp_tx(struct efx_nic *efx, struct sk_buff *skb)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+
|
|
|
+ skb_queue_tail(&ptp->txq, skb);
|
|
|
+
|
|
|
+ if ((udp_hdr(skb)->dest == htons(PTP_EVENT_PORT)) &&
|
|
|
+ (skb->len <= MC_CMD_PTP_IN_TRANSMIT_PACKET_MAXNUM))
|
|
|
+ efx_xmit_hwtstamp_pending(skb);
|
|
|
+ queue_work(ptp->workwq, &ptp->work);
|
|
|
+
|
|
|
+ return NETDEV_TX_OK;
|
|
|
+}
|
|
|
+
|
|
|
+static int efx_ptp_change_mode(struct efx_nic *efx, bool enable_wanted,
|
|
|
+ unsigned int new_mode)
|
|
|
+{
|
|
|
+ if ((enable_wanted != efx->ptp_data->enabled) ||
|
|
|
+ (enable_wanted && (efx->ptp_data->mode != new_mode))) {
|
|
|
+ int rc;
|
|
|
+
|
|
|
+ if (enable_wanted) {
|
|
|
+ /* Change of mode requires disable */
|
|
|
+ if (efx->ptp_data->enabled &&
|
|
|
+ (efx->ptp_data->mode != new_mode)) {
|
|
|
+ efx->ptp_data->enabled = false;
|
|
|
+ rc = efx_ptp_stop(efx);
|
|
|
+ if (rc != 0)
|
|
|
+ return rc;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Set new operating mode and establish
|
|
|
+ * baseline synchronisation, which must
|
|
|
+ * succeed.
|
|
|
+ */
|
|
|
+ efx->ptp_data->mode = new_mode;
|
|
|
+ rc = efx_ptp_start(efx);
|
|
|
+ if (rc == 0) {
|
|
|
+ rc = efx_ptp_synchronize(efx,
|
|
|
+ PTP_SYNC_ATTEMPTS * 2);
|
|
|
+ if (rc != 0)
|
|
|
+ efx_ptp_stop(efx);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ rc = efx_ptp_stop(efx);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (rc != 0)
|
|
|
+ return rc;
|
|
|
+
|
|
|
+ efx->ptp_data->enabled = enable_wanted;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int efx_ptp_ts_init(struct efx_nic *efx, struct hwtstamp_config *init)
|
|
|
+{
|
|
|
+ bool enable_wanted = false;
|
|
|
+ unsigned int new_mode;
|
|
|
+ int rc;
|
|
|
+
|
|
|
+ if (init->flags)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ if ((init->tx_type != HWTSTAMP_TX_OFF) &&
|
|
|
+ (init->tx_type != HWTSTAMP_TX_ON))
|
|
|
+ return -ERANGE;
|
|
|
+
|
|
|
+ new_mode = efx->ptp_data->mode;
|
|
|
+ /* Determine whether any PTP HW operations are required */
|
|
|
+ switch (init->rx_filter) {
|
|
|
+ case HWTSTAMP_FILTER_NONE:
|
|
|
+ break;
|
|
|
+ case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
|
|
|
+ case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
|
|
|
+ case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
|
|
|
+ init->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
|
|
|
+ new_mode = MC_CMD_PTP_MODE_V1;
|
|
|
+ enable_wanted = true;
|
|
|
+ break;
|
|
|
+ case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
|
|
|
+ case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
|
|
|
+ case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
|
|
|
+ /* Although these three are accepted only IPV4 packets will be
|
|
|
+ * timestamped
|
|
|
+ */
|
|
|
+ init->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
|
|
|
+ new_mode = MC_CMD_PTP_MODE_V2;
|
|
|
+ enable_wanted = true;
|
|
|
+ break;
|
|
|
+ case HWTSTAMP_FILTER_PTP_V2_EVENT:
|
|
|
+ case HWTSTAMP_FILTER_PTP_V2_SYNC:
|
|
|
+ case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
|
|
|
+ case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
|
|
|
+ case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
|
|
|
+ case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
|
|
|
+ /* Non-IP + IPv6 timestamping not supported */
|
|
|
+ return -ERANGE;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ return -ERANGE;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (init->tx_type != HWTSTAMP_TX_OFF)
|
|
|
+ enable_wanted = true;
|
|
|
+
|
|
|
+ rc = efx_ptp_change_mode(efx, enable_wanted, new_mode);
|
|
|
+ if (rc != 0)
|
|
|
+ return rc;
|
|
|
+
|
|
|
+ efx->ptp_data->config = *init;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+int
|
|
|
+efx_ptp_get_ts_info(struct net_device *net_dev, struct ethtool_ts_info *ts_info)
|
|
|
+{
|
|
|
+ struct efx_nic *efx = netdev_priv(net_dev);
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+
|
|
|
+ if (!ptp)
|
|
|
+ return -EOPNOTSUPP;
|
|
|
+
|
|
|
+ ts_info->so_timestamping = (SOF_TIMESTAMPING_TX_HARDWARE |
|
|
|
+ SOF_TIMESTAMPING_RX_HARDWARE |
|
|
|
+ SOF_TIMESTAMPING_RAW_HARDWARE);
|
|
|
+ ts_info->phc_index = ptp_clock_index(ptp->phc_clock);
|
|
|
+ ts_info->tx_types = 1 << HWTSTAMP_TX_OFF | 1 << HWTSTAMP_TX_ON;
|
|
|
+ ts_info->rx_filters = (1 << HWTSTAMP_FILTER_NONE |
|
|
|
+ 1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT |
|
|
|
+ 1 << HWTSTAMP_FILTER_PTP_V1_L4_SYNC |
|
|
|
+ 1 << HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ |
|
|
|
+ 1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT |
|
|
|
+ 1 << HWTSTAMP_FILTER_PTP_V2_L4_SYNC |
|
|
|
+ 1 << HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+int efx_ptp_ioctl(struct efx_nic *efx, struct ifreq *ifr, int cmd)
|
|
|
+{
|
|
|
+ struct hwtstamp_config config;
|
|
|
+ int rc;
|
|
|
+
|
|
|
+ /* Not a PTP enabled port */
|
|
|
+ if (!efx->ptp_data)
|
|
|
+ return -EOPNOTSUPP;
|
|
|
+
|
|
|
+ if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
|
|
|
+ return -EFAULT;
|
|
|
+
|
|
|
+ rc = efx_ptp_ts_init(efx, &config);
|
|
|
+ if (rc != 0)
|
|
|
+ return rc;
|
|
|
+
|
|
|
+ return copy_to_user(ifr->ifr_data, &config, sizeof(config))
|
|
|
+ ? -EFAULT : 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void ptp_event_failure(struct efx_nic *efx, int expected_frag_len)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+
|
|
|
+ netif_err(efx, hw, efx->net_dev,
|
|
|
+ "PTP unexpected event length: got %d expected %d\n",
|
|
|
+ ptp->evt_frag_idx, expected_frag_len);
|
|
|
+ ptp->reset_required = true;
|
|
|
+ queue_work(ptp->workwq, &ptp->work);
|
|
|
+}
|
|
|
+
|
|
|
+/* Process a completed receive event. Put it on the event queue and
|
|
|
+ * start worker thread. This is required because event and their
|
|
|
+ * correspoding packets may come in either order.
|
|
|
+ */
|
|
|
+static void ptp_event_rx(struct efx_nic *efx, struct efx_ptp_data *ptp)
|
|
|
+{
|
|
|
+ struct efx_ptp_event_rx *evt = NULL;
|
|
|
+
|
|
|
+ if (ptp->evt_frag_idx != 3) {
|
|
|
+ ptp_event_failure(efx, 3);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ spin_lock_bh(&ptp->evt_lock);
|
|
|
+ if (!list_empty(&ptp->evt_free_list)) {
|
|
|
+ evt = list_first_entry(&ptp->evt_free_list,
|
|
|
+ struct efx_ptp_event_rx, link);
|
|
|
+ list_del(&evt->link);
|
|
|
+
|
|
|
+ evt->seq0 = EFX_QWORD_FIELD(ptp->evt_frags[2], MCDI_EVENT_DATA);
|
|
|
+ evt->seq1 = (EFX_QWORD_FIELD(ptp->evt_frags[2],
|
|
|
+ MCDI_EVENT_SRC) |
|
|
|
+ (EFX_QWORD_FIELD(ptp->evt_frags[1],
|
|
|
+ MCDI_EVENT_SRC) << 8) |
|
|
|
+ (EFX_QWORD_FIELD(ptp->evt_frags[0],
|
|
|
+ MCDI_EVENT_SRC) << 16));
|
|
|
+ evt->hwtimestamp = ktime_set(
|
|
|
+ EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA),
|
|
|
+ EFX_QWORD_FIELD(ptp->evt_frags[1], MCDI_EVENT_DATA));
|
|
|
+ evt->expiry = jiffies + msecs_to_jiffies(PKT_EVENT_LIFETIME_MS);
|
|
|
+ list_add_tail(&evt->link, &ptp->evt_list);
|
|
|
+
|
|
|
+ queue_work(ptp->workwq, &ptp->work);
|
|
|
+ } else {
|
|
|
+ netif_err(efx, rx_err, efx->net_dev, "No free PTP event");
|
|
|
+ }
|
|
|
+ spin_unlock_bh(&ptp->evt_lock);
|
|
|
+}
|
|
|
+
|
|
|
+static void ptp_event_fault(struct efx_nic *efx, struct efx_ptp_data *ptp)
|
|
|
+{
|
|
|
+ int code = EFX_QWORD_FIELD(ptp->evt_frags[0], MCDI_EVENT_DATA);
|
|
|
+ if (ptp->evt_frag_idx != 1) {
|
|
|
+ ptp_event_failure(efx, 1);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ netif_err(efx, hw, efx->net_dev, "PTP error %d\n", code);
|
|
|
+}
|
|
|
+
|
|
|
+static void ptp_event_pps(struct efx_nic *efx, struct efx_ptp_data *ptp)
|
|
|
+{
|
|
|
+ if (ptp->nic_ts_enabled)
|
|
|
+ queue_work(ptp->pps_workwq, &ptp->pps_work);
|
|
|
+}
|
|
|
+
|
|
|
+void efx_ptp_event(struct efx_nic *efx, efx_qword_t *ev)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp = efx->ptp_data;
|
|
|
+ int code = EFX_QWORD_FIELD(*ev, MCDI_EVENT_CODE);
|
|
|
+
|
|
|
+ if (!ptp->enabled)
|
|
|
+ return;
|
|
|
+
|
|
|
+ if (ptp->evt_frag_idx == 0) {
|
|
|
+ ptp->evt_code = code;
|
|
|
+ } else if (ptp->evt_code != code) {
|
|
|
+ netif_err(efx, hw, efx->net_dev,
|
|
|
+ "PTP out of sequence event %d\n", code);
|
|
|
+ ptp->evt_frag_idx = 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ ptp->evt_frags[ptp->evt_frag_idx++] = *ev;
|
|
|
+ if (!MCDI_EVENT_FIELD(*ev, CONT)) {
|
|
|
+ /* Process resulting event */
|
|
|
+ switch (code) {
|
|
|
+ case MCDI_EVENT_CODE_PTP_RX:
|
|
|
+ ptp_event_rx(efx, ptp);
|
|
|
+ break;
|
|
|
+ case MCDI_EVENT_CODE_PTP_FAULT:
|
|
|
+ ptp_event_fault(efx, ptp);
|
|
|
+ break;
|
|
|
+ case MCDI_EVENT_CODE_PTP_PPS:
|
|
|
+ ptp_event_pps(efx, ptp);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ netif_err(efx, hw, efx->net_dev,
|
|
|
+ "PTP unknown event %d\n", code);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ ptp->evt_frag_idx = 0;
|
|
|
+ } else if (MAX_EVENT_FRAGS == ptp->evt_frag_idx) {
|
|
|
+ netif_err(efx, hw, efx->net_dev,
|
|
|
+ "PTP too many event fragments\n");
|
|
|
+ ptp->evt_frag_idx = 0;
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static int efx_phc_adjfreq(struct ptp_clock_info *ptp, s32 delta)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp_data = container_of(ptp,
|
|
|
+ struct efx_ptp_data,
|
|
|
+ phc_clock_info);
|
|
|
+ struct efx_nic *efx = ptp_data->channel->efx;
|
|
|
+ u8 inadj[MC_CMD_PTP_IN_ADJUST_LEN];
|
|
|
+ s64 adjustment_ns;
|
|
|
+ int rc;
|
|
|
+
|
|
|
+ if (delta > MAX_PPB)
|
|
|
+ delta = MAX_PPB;
|
|
|
+ else if (delta < -MAX_PPB)
|
|
|
+ delta = -MAX_PPB;
|
|
|
+
|
|
|
+ /* Convert ppb to fixed point ns. */
|
|
|
+ adjustment_ns = (((s64)delta * PPB_SCALE_WORD) >>
|
|
|
+ (PPB_EXTRA_BITS + MAX_PPB_BITS));
|
|
|
+
|
|
|
+ MCDI_SET_DWORD(inadj, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST);
|
|
|
+ MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_FREQ_LO, (u32)adjustment_ns);
|
|
|
+ MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_FREQ_HI,
|
|
|
+ (u32)(adjustment_ns >> 32));
|
|
|
+ MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_SECONDS, 0);
|
|
|
+ MCDI_SET_DWORD(inadj, PTP_IN_ADJUST_NANOSECONDS, 0);
|
|
|
+ rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inadj, sizeof(inadj),
|
|
|
+ NULL, 0, NULL);
|
|
|
+ if (rc != 0)
|
|
|
+ return rc;
|
|
|
+
|
|
|
+ ptp_data->current_adjfreq = delta;
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int efx_phc_adjtime(struct ptp_clock_info *ptp, s64 delta)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp_data = container_of(ptp,
|
|
|
+ struct efx_ptp_data,
|
|
|
+ phc_clock_info);
|
|
|
+ struct efx_nic *efx = ptp_data->channel->efx;
|
|
|
+ struct timespec delta_ts = ns_to_timespec(delta);
|
|
|
+ u8 inbuf[MC_CMD_PTP_IN_ADJUST_LEN];
|
|
|
+
|
|
|
+ MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_ADJUST);
|
|
|
+ MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_FREQ_LO, 0);
|
|
|
+ MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_FREQ_HI, 0);
|
|
|
+ MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_SECONDS, (u32)delta_ts.tv_sec);
|
|
|
+ MCDI_SET_DWORD(inbuf, PTP_IN_ADJUST_NANOSECONDS, (u32)delta_ts.tv_nsec);
|
|
|
+ return efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
|
|
|
+ NULL, 0, NULL);
|
|
|
+}
|
|
|
+
|
|
|
+static int efx_phc_gettime(struct ptp_clock_info *ptp, struct timespec *ts)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp_data = container_of(ptp,
|
|
|
+ struct efx_ptp_data,
|
|
|
+ phc_clock_info);
|
|
|
+ struct efx_nic *efx = ptp_data->channel->efx;
|
|
|
+ u8 inbuf[MC_CMD_PTP_IN_READ_NIC_TIME_LEN];
|
|
|
+ u8 outbuf[MC_CMD_PTP_OUT_READ_NIC_TIME_LEN];
|
|
|
+ int rc;
|
|
|
+
|
|
|
+ MCDI_SET_DWORD(inbuf, PTP_IN_OP, MC_CMD_PTP_OP_READ_NIC_TIME);
|
|
|
+
|
|
|
+ rc = efx_mcdi_rpc(efx, MC_CMD_PTP, inbuf, sizeof(inbuf),
|
|
|
+ outbuf, sizeof(outbuf), NULL);
|
|
|
+ if (rc != 0)
|
|
|
+ return rc;
|
|
|
+
|
|
|
+ ts->tv_sec = MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_SECONDS);
|
|
|
+ ts->tv_nsec = MCDI_DWORD(outbuf, PTP_OUT_READ_NIC_TIME_NANOSECONDS);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int efx_phc_settime(struct ptp_clock_info *ptp,
|
|
|
+ const struct timespec *e_ts)
|
|
|
+{
|
|
|
+ /* Get the current NIC time, efx_phc_gettime.
|
|
|
+ * Subtract from the desired time to get the offset
|
|
|
+ * call efx_phc_adjtime with the offset
|
|
|
+ */
|
|
|
+ int rc;
|
|
|
+ struct timespec time_now;
|
|
|
+ struct timespec delta;
|
|
|
+
|
|
|
+ rc = efx_phc_gettime(ptp, &time_now);
|
|
|
+ if (rc != 0)
|
|
|
+ return rc;
|
|
|
+
|
|
|
+ delta = timespec_sub(*e_ts, time_now);
|
|
|
+
|
|
|
+ efx_phc_adjtime(ptp, timespec_to_ns(&delta));
|
|
|
+ if (rc != 0)
|
|
|
+ return rc;
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int efx_phc_enable(struct ptp_clock_info *ptp,
|
|
|
+ struct ptp_clock_request *request,
|
|
|
+ int enable)
|
|
|
+{
|
|
|
+ struct efx_ptp_data *ptp_data = container_of(ptp,
|
|
|
+ struct efx_ptp_data,
|
|
|
+ phc_clock_info);
|
|
|
+ if (request->type != PTP_CLK_REQ_PPS)
|
|
|
+ return -EOPNOTSUPP;
|
|
|
+
|
|
|
+ ptp_data->nic_ts_enabled = !!enable;
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct efx_channel_type efx_ptp_channel_type = {
|
|
|
+ .handle_no_channel = efx_ptp_handle_no_channel,
|
|
|
+ .pre_probe = efx_ptp_probe_channel,
|
|
|
+ .post_remove = efx_ptp_remove_channel,
|
|
|
+ .get_name = efx_ptp_get_channel_name,
|
|
|
+ /* no copy operation; there is no need to reallocate this channel */
|
|
|
+ .receive_skb = efx_ptp_rx,
|
|
|
+ .keep_eventq = false,
|
|
|
+};
|
|
|
+
|
|
|
+void efx_ptp_probe(struct efx_nic *efx)
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+{
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+ /* Check whether PTP is implemented on this NIC. The DISABLE
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+ * operation will succeed if and only if it is implemented.
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+ */
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+ if (efx_ptp_disable(efx) == 0)
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+ efx->extra_channel_type[EFX_EXTRA_CHANNEL_PTP] =
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+ &efx_ptp_channel_type;
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+}
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David S. Miller