diff options
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_common.c | 1 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_ptp.c | 63 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_ptp.h | 4 | ||||
| -rw-r--r-- | include/linux/dsa/ksz_common.h | 21 | ||||
| -rw-r--r-- | net/dsa/tag_ksz.c | 25 |
5 files changed, 108 insertions, 6 deletions
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index bdd068322ca0..b4e7d579ac51 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -2991,6 +2991,7 @@ static const struct dsa_switch_ops ksz_switch_ops = { .get_ts_info = ksz_get_ts_info, .port_hwtstamp_get = ksz_hwtstamp_get, .port_hwtstamp_set = ksz_hwtstamp_set, + .port_rxtstamp = ksz_port_rxtstamp, }; struct ksz_device *ksz_switch_alloc(struct device *base, void *priv) diff --git a/drivers/net/dsa/microchip/ksz_ptp.c b/drivers/net/dsa/microchip/ksz_ptp.c index 6cf30bf50c7e..29413fb608ed 100644 --- a/drivers/net/dsa/microchip/ksz_ptp.c +++ b/drivers/net/dsa/microchip/ksz_ptp.c @@ -169,6 +169,69 @@ int ksz_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr) return copy_to_user(ifr->ifr_data, &config, sizeof(config)); } +static ktime_t ksz_tstamp_reconstruct(struct ksz_device *dev, ktime_t tstamp) +{ + struct timespec64 ptp_clock_time; + struct ksz_ptp_data *ptp_data; + struct timespec64 diff; + struct timespec64 ts; + + ptp_data = &dev->ptp_data; + ts = ktime_to_timespec64(tstamp); + + spin_lock_bh(&ptp_data->clock_lock); + ptp_clock_time = ptp_data->clock_time; + spin_unlock_bh(&ptp_data->clock_lock); + + /* calculate full time from partial time stamp */ + ts.tv_sec = (ptp_clock_time.tv_sec & ~3) | ts.tv_sec; + + /* find nearest possible point in time */ + diff = timespec64_sub(ts, ptp_clock_time); + if (diff.tv_sec > 2) + ts.tv_sec -= 4; + else if (diff.tv_sec < -2) + ts.tv_sec += 4; + + return timespec64_to_ktime(ts); +} + +bool ksz_port_rxtstamp(struct dsa_switch *ds, int port, struct sk_buff *skb, + unsigned int type) +{ + struct skb_shared_hwtstamps *hwtstamps = skb_hwtstamps(skb); + struct ksz_device *dev = ds->priv; + struct ptp_header *ptp_hdr; + u8 ptp_msg_type; + ktime_t tstamp; + s64 correction; + + tstamp = KSZ_SKB_CB(skb)->tstamp; + memset(hwtstamps, 0, sizeof(*hwtstamps)); + hwtstamps->hwtstamp = ksz_tstamp_reconstruct(dev, tstamp); + + ptp_hdr = ptp_parse_header(skb, type); + if (!ptp_hdr) + goto out; + + ptp_msg_type = ptp_get_msgtype(ptp_hdr, type); + if (ptp_msg_type != PTP_MSGTYPE_PDELAY_REQ) + goto out; + + /* Only subtract the partial time stamp from the correction field. When + * the hardware adds the egress time stamp to the correction field of + * the PDelay_Resp message on tx, also only the partial time stamp will + * be added. + */ + correction = (s64)get_unaligned_be64(&ptp_hdr->correction); + correction -= ktime_to_ns(tstamp) << 16; + + ptp_header_update_correction(skb, type, ptp_hdr, correction); + +out: + return false; +} + static int _ksz_ptp_gettime(struct ksz_device *dev, struct timespec64 *ts) { u32 nanoseconds; diff --git a/drivers/net/dsa/microchip/ksz_ptp.h b/drivers/net/dsa/microchip/ksz_ptp.h index 7c5679372705..9bb8fb059ac2 100644 --- a/drivers/net/dsa/microchip/ksz_ptp.h +++ b/drivers/net/dsa/microchip/ksz_ptp.h @@ -30,6 +30,8 @@ int ksz_get_ts_info(struct dsa_switch *ds, int port, struct ethtool_ts_info *ts); int ksz_hwtstamp_get(struct dsa_switch *ds, int port, struct ifreq *ifr); int ksz_hwtstamp_set(struct dsa_switch *ds, int port, struct ifreq *ifr); +bool ksz_port_rxtstamp(struct dsa_switch *ds, int port, struct sk_buff *skb, + unsigned int type); int ksz_ptp_irq_setup(struct dsa_switch *ds, u8 p); void ksz_ptp_irq_free(struct dsa_switch *ds, u8 p); @@ -60,6 +62,8 @@ static inline void ksz_ptp_irq_free(struct dsa_switch *ds, u8 p) {} #define ksz_hwtstamp_set NULL +#define ksz_port_rxtstamp NULL + #endif /* End of CONFIG_NET_DSA_MICROCHIP_KSZ_PTP */ #endif diff --git a/include/linux/dsa/ksz_common.h b/include/linux/dsa/ksz_common.h index d2a54161be97..a256b08d837d 100644 --- a/include/linux/dsa/ksz_common.h +++ b/include/linux/dsa/ksz_common.h @@ -9,10 +9,31 @@ #include <net/dsa.h> +/* All time stamps from the KSZ consist of 2 bits for seconds and 30 bits for + * nanoseconds. This is NOT the same as 32 bits for nanoseconds. + */ +#define KSZ_TSTAMP_SEC_MASK GENMASK(31, 30) +#define KSZ_TSTAMP_NSEC_MASK GENMASK(29, 0) + +static inline ktime_t ksz_decode_tstamp(u32 tstamp) +{ + u64 ns = FIELD_GET(KSZ_TSTAMP_SEC_MASK, tstamp) * NSEC_PER_SEC + + FIELD_GET(KSZ_TSTAMP_NSEC_MASK, tstamp); + + return ns_to_ktime(ns); +} + struct ksz_tagger_data { void (*hwtstamp_set_state)(struct dsa_switch *ds, bool on); }; +struct ksz_skb_cb { + u32 tstamp; +}; + +#define KSZ_SKB_CB(skb) \ + ((struct ksz_skb_cb *)((skb)->cb)) + static inline struct ksz_tagger_data * ksz_tagger_data(struct dsa_switch *ds) { diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c index 420a12853676..6603eaa234d2 100644 --- a/net/dsa/tag_ksz.c +++ b/net/dsa/tag_ksz.c @@ -151,10 +151,11 @@ MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ8795, KSZ8795_NAME); * tag0 : Prioritization (not used now) * tag1 : each bit represents port (eg, 0x01=port1, 0x02=port2, 0x10=port5) * - * For Egress (KSZ9477 -> Host), 1 byte is added before FCS. + * For Egress (KSZ9477 -> Host), 1/5 bytes is added before FCS. * --------------------------------------------------------------------------- - * DA(6bytes)|SA(6bytes)|....|Data(nbytes)|tag0(1byte)|FCS(4bytes) + * DA(6bytes)|SA(6bytes)|....|Data(nbytes)|ts(4bytes)|tag0(1byte)|FCS(4bytes) * --------------------------------------------------------------------------- + * ts : time stamp (Present only if bit 7 of tag0 is set) * tag0 : zero-based value represents port * (eg, 0x00=port1, 0x02=port3, 0x06=port7) */ @@ -166,6 +167,15 @@ MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ8795, KSZ8795_NAME); #define KSZ9477_TAIL_TAG_OVERRIDE BIT(9) #define KSZ9477_TAIL_TAG_LOOKUP BIT(10) +static void ksz_rcv_timestamp(struct sk_buff *skb, u8 *tag) +{ + u8 *tstamp_raw = tag - KSZ_PTP_TAG_LEN; + ktime_t tstamp; + + tstamp = ksz_decode_tstamp(get_unaligned_be32(tstamp_raw)); + KSZ_SKB_CB(skb)->tstamp = tstamp; +} + /* Time stamp tag *needs* to be inserted if PTP is enabled in hardware. * Regardless of Whether it is a PTP frame or not. */ @@ -216,8 +226,10 @@ static struct sk_buff *ksz9477_rcv(struct sk_buff *skb, struct net_device *dev) unsigned int len = KSZ_EGRESS_TAG_LEN; /* Extra 4-bytes PTP timestamp */ - if (tag[0] & KSZ9477_PTP_TAG_INDICATION) - len += KSZ9477_PTP_TAG_LEN; + if (tag[0] & KSZ9477_PTP_TAG_INDICATION) { + ksz_rcv_timestamp(skb, tag); + len += KSZ_PTP_TAG_LEN; + } return ksz_common_rcv(skb, dev, port, len); } @@ -284,10 +296,11 @@ MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_KSZ9893, KSZ9893_NAME); * tag0 : represents tag override, lookup and valid * tag1 : each bit represents port (eg, 0x01=port1, 0x02=port2, 0x80=port8) * - * For rcv, 1 byte is added before FCS. + * For rcv, 1/5 bytes is added before FCS. * --------------------------------------------------------------------------- - * DA(6bytes)|SA(6bytes)|....|Data(nbytes)|tag0(1byte)|FCS(4bytes) + * DA(6bytes)|SA(6bytes)|....|Data(nbytes)|ts(4bytes)|tag0(1byte)|FCS(4bytes) * --------------------------------------------------------------------------- + * ts : time stamp (Present only if bit 7 of tag0 is set) * tag0 : zero-based value represents port * (eg, 0x00=port1, 0x02=port3, 0x07=port8) */ |