Merge branch 'mlxsw-ptp-spectrum-2'

Ido Schimmel says:

====================
mlxsw: Add PTP support for Spectrum-2 and newer ASICs

This patchset adds PTP support for Spectrum-{2,3,4} switch ASICs. They
all act largely the same with respect to PTP except for a workaround
implemented for Spectrum-{2,3} in patch #6.

Spectrum-2 and newer ASICs essentially implement a transparent clock
between all the switch ports, including the CPU port. The hardware will
generate the UTC time stamp for transmitted / received packets at the
CPU port, but will compensate for forwarding delays in the ASIC by
adjusting the correction field in the PTP header (for PTP events) at the
ingress and egress ports.

Specifically, the hardware will subtract the current time stamp from the
correction field at the ingress port and will add the current time stamp
to the correction field at the egress port. For the purpose of an
ordinary or boundary clock (this patchset), the correction field will
always be adjusted between the CPU port and one of the front panel
ports, but never between two front panel ports.

Patchset overview:

Patch #1 extracts a helper to configure traps for PTP packets (event and
general messages). The helper is shared between all Spectrum
generations.

Patch #2 transitions Spectrum-2 and newer ASICs to use a different
format of Tx completions that includes the UTC time stamp of transmitted
packets.

Patch #3 adds basic initialization required for Spectrum-2 PTP support.
It mainly invokes the helper from patch #1.

Patch #4 adds helpers to read the UTC time (seconds and nanoseconds)
from the device over memory-mapped I/O instead of going through firmware
which is slower and therefore inaccurate. The helpers will be used to
implement various PHC operations (e.g., gettimex64) and to construct the
full UTC time stamp from the truncated one reported over Tx / Rx
completions.

Patch #5 implements the various PHC operations.

Patch #6 implements the previously described workaround for
Spectrum-{2,3}.

Patch #7 adds the ability to report a hardware time stamp for a received
/ transmitted packet based off the associated Rx / Tx completion that
includes a truncated UTC time stamp.

Patches #8 and #9 implement support for the SIOCGHWTSTAMP /
SIOCSHWTSTAMP ioctls and the get_ts_info ethtool callback, respectively.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/core.c

@@ -3335,6 +3335,24 @@ u32 mlxsw_core_read_frc_l(struct mlxsw_core *mlxsw_core)
 }
 EXPORT_SYMBOL(mlxsw_core_read_frc_l);
 
+u32 mlxsw_core_read_utc_sec(struct mlxsw_core *mlxsw_core)
+{
+	return mlxsw_core->bus->read_utc_sec(mlxsw_core->bus_priv);
+}
+EXPORT_SYMBOL(mlxsw_core_read_utc_sec);
+
+u32 mlxsw_core_read_utc_nsec(struct mlxsw_core *mlxsw_core)
+{
+	return mlxsw_core->bus->read_utc_nsec(mlxsw_core->bus_priv);
+}
+EXPORT_SYMBOL(mlxsw_core_read_utc_nsec);
+
+bool mlxsw_core_sdq_supports_cqe_v2(struct mlxsw_core *mlxsw_core)
+{
+	return mlxsw_core->driver->sdq_supports_cqe_v2;
+}
+EXPORT_SYMBOL(mlxsw_core_sdq_supports_cqe_v2);
+
 void mlxsw_core_emad_string_tlv_enable(struct mlxsw_core *mlxsw_core)
 {
 	mlxsw_core->emad.enable_string_tlv = true;

drivers/net/ethernet/mellanox/mlxsw/core.h

@@ -427,6 +427,7 @@ struct mlxsw_driver {
 
 	u8 txhdr_len;
 	const struct mlxsw_config_profile *profile;
+	bool sdq_supports_cqe_v2;
 };
 
 int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core,
@@ -437,6 +438,11 @@ int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core,
 u32 mlxsw_core_read_frc_h(struct mlxsw_core *mlxsw_core);
 u32 mlxsw_core_read_frc_l(struct mlxsw_core *mlxsw_core);
 
+u32 mlxsw_core_read_utc_sec(struct mlxsw_core *mlxsw_core);
+u32 mlxsw_core_read_utc_nsec(struct mlxsw_core *mlxsw_core);
+
+bool mlxsw_core_sdq_supports_cqe_v2(struct mlxsw_core *mlxsw_core);
+
 void mlxsw_core_emad_string_tlv_enable(struct mlxsw_core *mlxsw_core);
 
 bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core,
@@ -476,6 +482,8 @@ struct mlxsw_bus {
 			u8 *p_status);
 	u32 (*read_frc_h)(void *bus_priv);
 	u32 (*read_frc_l)(void *bus_priv);
+	u32 (*read_utc_sec)(void *bus_priv);
+	u32 (*read_utc_nsec)(void *bus_priv);
 	u8 features;
 };
 
@@ -550,11 +558,17 @@ enum mlxsw_devlink_param_id {
 	MLXSW_DEVLINK_PARAM_ID_ACL_REGION_REHASH_INTERVAL,
 };
 
+struct mlxsw_cqe_ts {
+	u8 sec;
+	u32 nsec;
+};
+
 struct mlxsw_skb_cb {
 	union {
 		struct mlxsw_tx_info tx_info;
 		struct mlxsw_rx_md_info rx_md_info;
 	};
+	struct mlxsw_cqe_ts cqe_ts;
 };
 
 static inline struct mlxsw_skb_cb *mlxsw_skb_cb(struct sk_buff *skb)

drivers/net/ethernet/mellanox/mlxsw/pci.c

@@ -103,6 +103,8 @@ struct mlxsw_pci {
 	struct pci_dev *pdev;
 	u8 __iomem *hw_addr;
 	u64 free_running_clock_offset;
+	u64 utc_sec_offset;
+	u64 utc_nsec_offset;
 	struct mlxsw_pci_queue_type_group queues[MLXSW_PCI_QUEUE_TYPE_COUNT];
 	u32 doorbell_offset;
 	struct mlxsw_core *core;
@@ -456,9 +458,9 @@ static void mlxsw_pci_cq_pre_init(struct mlxsw_pci *mlxsw_pci,
 {
 	q->u.cq.v = mlxsw_pci->max_cqe_ver;
 
-	/* For SDQ it is pointless to use CQEv2, so use CQEv1 instead */
 	if (q->u.cq.v == MLXSW_PCI_CQE_V2 &&
-	    q->num < mlxsw_pci->num_sdq_cqs)
+	    q->num < mlxsw_pci->num_sdq_cqs &&
+	    !mlxsw_core_sdq_supports_cqe_v2(mlxsw_pci->core))
 		q->u.cq.v = MLXSW_PCI_CQE_V1;
 }
 
@@ -511,9 +513,26 @@ static unsigned int mlxsw_pci_read32_off(struct mlxsw_pci *mlxsw_pci,
 	return ioread32be(mlxsw_pci->hw_addr + off);
 }
 
+static void mlxsw_pci_skb_cb_ts_set(struct mlxsw_pci *mlxsw_pci,
+				    struct sk_buff *skb,
+				    enum mlxsw_pci_cqe_v cqe_v, char *cqe)
+{
+	if (cqe_v != MLXSW_PCI_CQE_V2)
+		return;
+
+	if (mlxsw_pci_cqe2_time_stamp_type_get(cqe) !=
+	    MLXSW_PCI_CQE_TIME_STAMP_TYPE_UTC)
+		return;
+
+	mlxsw_skb_cb(skb)->cqe_ts.sec = mlxsw_pci_cqe2_time_stamp_sec_get(cqe);
+	mlxsw_skb_cb(skb)->cqe_ts.nsec =
+		mlxsw_pci_cqe2_time_stamp_nsec_get(cqe);
+}
+
 static void mlxsw_pci_cqe_sdq_handle(struct mlxsw_pci *mlxsw_pci,
 				     struct mlxsw_pci_queue *q,
 				     u16 consumer_counter_limit,
+				     enum mlxsw_pci_cqe_v cqe_v,
 				     char *cqe)
 {
 	struct pci_dev *pdev = mlxsw_pci->pdev;
@@ -533,6 +552,7 @@ static void mlxsw_pci_cqe_sdq_handle(struct mlxsw_pci *mlxsw_pci,
 
 	if (unlikely(!tx_info.is_emad &&
 		     skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
+		mlxsw_pci_skb_cb_ts_set(mlxsw_pci, skb, cqe_v, cqe);
 		mlxsw_core_ptp_transmitted(mlxsw_pci->core, skb,
 					   tx_info.local_port);
 		skb = NULL;
@@ -653,6 +673,8 @@ static void mlxsw_pci_cqe_rdq_handle(struct mlxsw_pci *mlxsw_pci,
 		mlxsw_pci_cqe_rdq_md_tx_port_init(skb, cqe);
 	}
 
+	mlxsw_pci_skb_cb_ts_set(mlxsw_pci, skb, cqe_v, cqe);
+
 	byte_count = mlxsw_pci_cqe_byte_count_get(cqe);
 	if (mlxsw_pci_cqe_crc_get(cqe_v, cqe))
 		byte_count -= ETH_FCS_LEN;
@@ -704,7 +726,7 @@ static void mlxsw_pci_cq_tasklet(struct tasklet_struct *t)
 
 			sdq = mlxsw_pci_sdq_get(mlxsw_pci, dqn);
 			mlxsw_pci_cqe_sdq_handle(mlxsw_pci, sdq,
-						 wqe_counter, ncqe);
+						 wqe_counter, q->u.cq.v, ncqe);
 			q->u.cq.comp_sdq_count++;
 		} else {
 			struct mlxsw_pci_queue *rdq;
@@ -1537,6 +1559,24 @@ static int mlxsw_pci_init(void *bus_priv, struct mlxsw_core *mlxsw_core,
 	mlxsw_pci->free_running_clock_offset =
 		mlxsw_cmd_mbox_query_fw_free_running_clock_offset_get(mbox);
 
+	if (mlxsw_cmd_mbox_query_fw_utc_sec_bar_get(mbox) != 0) {
+		dev_err(&pdev->dev, "Unsupported UTC sec BAR queried from hw\n");
+		err = -EINVAL;
+		goto err_utc_sec_bar;
+	}
+
+	mlxsw_pci->utc_sec_offset =
+		mlxsw_cmd_mbox_query_fw_utc_sec_offset_get(mbox);
+
+	if (mlxsw_cmd_mbox_query_fw_utc_nsec_bar_get(mbox) != 0) {
+		dev_err(&pdev->dev, "Unsupported UTC nsec BAR queried from hw\n");
+		err = -EINVAL;
+		goto err_utc_nsec_bar;
+	}
+
+	mlxsw_pci->utc_nsec_offset =
+		mlxsw_cmd_mbox_query_fw_utc_nsec_offset_get(mbox);
+
 	num_pages = mlxsw_cmd_mbox_query_fw_fw_pages_get(mbox);
 	err = mlxsw_pci_fw_area_init(mlxsw_pci, mbox, num_pages);
 	if (err)
@@ -1601,6 +1641,8 @@ static int mlxsw_pci_init(void *bus_priv, struct mlxsw_core *mlxsw_core,
 err_boardinfo:
 	mlxsw_pci_fw_area_fini(mlxsw_pci);
 err_fw_area_init:
+err_utc_nsec_bar:
+err_utc_sec_bar:
 err_fr_rn_clk_bar:
 err_doorbell_page_bar:
 err_iface_rev:
@@ -1830,6 +1872,20 @@ static u32 mlxsw_pci_read_frc_l(void *bus_priv)
 	return mlxsw_pci_read32_off(mlxsw_pci, frc_offset_l);
 }
 
+static u32 mlxsw_pci_read_utc_sec(void *bus_priv)
+{
+	struct mlxsw_pci *mlxsw_pci = bus_priv;
+
+	return mlxsw_pci_read32_off(mlxsw_pci, mlxsw_pci->utc_sec_offset);
+}
+
+static u32 mlxsw_pci_read_utc_nsec(void *bus_priv)
+{
+	struct mlxsw_pci *mlxsw_pci = bus_priv;
+
+	return mlxsw_pci_read32_off(mlxsw_pci, mlxsw_pci->utc_nsec_offset);
+}
+
 static const struct mlxsw_bus mlxsw_pci_bus = {
 	.kind			= "pci",
 	.init			= mlxsw_pci_init,
@@ -1839,6 +1895,8 @@ static const struct mlxsw_bus mlxsw_pci_bus = {
 	.cmd_exec		= mlxsw_pci_cmd_exec,
 	.read_frc_h		= mlxsw_pci_read_frc_h,
 	.read_frc_l		= mlxsw_pci_read_frc_l,
+	.read_utc_sec		= mlxsw_pci_read_utc_sec,
+	.read_utc_nsec		= mlxsw_pci_read_utc_nsec,
 	.features		= MLXSW_BUS_F_TXRX | MLXSW_BUS_F_RESET,
 };
 

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -29,6 +29,7 @@
 #include <net/pkt_cls.h>
 #include <net/netevent.h>
 #include <net/addrconf.h>
+#include <linux/ptp_classify.h>
 
 #include "spectrum.h"
 #include "pci.h"
@@ -230,8 +231,8 @@ void mlxsw_sp_flow_counter_free(struct mlxsw_sp *mlxsw_sp,
 			       counter_index);
 }
 
-static void mlxsw_sp_txhdr_construct(struct sk_buff *skb,
-				     const struct mlxsw_tx_info *tx_info)
+void mlxsw_sp_txhdr_construct(struct sk_buff *skb,
+			      const struct mlxsw_tx_info *tx_info)
 {
 	char *txhdr = skb_push(skb, MLXSW_TXHDR_LEN);
 
@@ -246,6 +247,82 @@ static void mlxsw_sp_txhdr_construct(struct sk_buff *skb,
 	mlxsw_tx_hdr_type_set(txhdr, MLXSW_TXHDR_TYPE_CONTROL);
 }
 
+int
+mlxsw_sp_txhdr_ptp_data_construct(struct mlxsw_core *mlxsw_core,
+				  struct mlxsw_sp_port *mlxsw_sp_port,
+				  struct sk_buff *skb,
+				  const struct mlxsw_tx_info *tx_info)
+{
+	char *txhdr;
+	u16 max_fid;
+	int err;
+
+	if (skb_cow_head(skb, MLXSW_TXHDR_LEN)) {
+		err = -ENOMEM;
+		goto err_skb_cow_head;
+	}
+
+	if (!MLXSW_CORE_RES_VALID(mlxsw_core, FID)) {
+		err = -EIO;
+		goto err_res_valid;
+	}
+	max_fid = MLXSW_CORE_RES_GET(mlxsw_core, FID);
+
+	txhdr = skb_push(skb, MLXSW_TXHDR_LEN);
+	memset(txhdr, 0, MLXSW_TXHDR_LEN);
+
+	mlxsw_tx_hdr_version_set(txhdr, MLXSW_TXHDR_VERSION_1);
+	mlxsw_tx_hdr_proto_set(txhdr, MLXSW_TXHDR_PROTO_ETH);
+	mlxsw_tx_hdr_rx_is_router_set(txhdr, true);
+	mlxsw_tx_hdr_fid_valid_set(txhdr, true);
+	mlxsw_tx_hdr_fid_set(txhdr, max_fid + tx_info->local_port - 1);
+	mlxsw_tx_hdr_type_set(txhdr, MLXSW_TXHDR_TYPE_DATA);
+	return 0;
+
+err_res_valid:
+err_skb_cow_head:
+	this_cpu_inc(mlxsw_sp_port->pcpu_stats->tx_dropped);
+	dev_kfree_skb_any(skb);
+	return err;
+}
+
+static bool mlxsw_sp_skb_requires_ts(struct sk_buff *skb)
+{
+	unsigned int type;
+
+	if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
+		return false;
+
+	type = ptp_classify_raw(skb);
+	return !!ptp_parse_header(skb, type);
+}
+
+static int mlxsw_sp_txhdr_handle(struct mlxsw_core *mlxsw_core,
+				 struct mlxsw_sp_port *mlxsw_sp_port,
+				 struct sk_buff *skb,
+				 const struct mlxsw_tx_info *tx_info)
+{
+	struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
+
+	/* In Spectrum-2 and Spectrum-3, PTP events that require a time stamp
+	 * need special handling and cannot be transmitted as regular control
+	 * packets.
+	 */
+	if (unlikely(mlxsw_sp_skb_requires_ts(skb)))
+		return mlxsw_sp->ptp_ops->txhdr_construct(mlxsw_core,
+							  mlxsw_sp_port, skb,
+							  tx_info);
+
+	if (skb_cow_head(skb, MLXSW_TXHDR_LEN)) {
+		this_cpu_inc(mlxsw_sp_port->pcpu_stats->tx_dropped);
+		dev_kfree_skb_any(skb);
+		return -ENOMEM;
+	}
+
+	mlxsw_sp_txhdr_construct(skb, tx_info);
+	return 0;
+}
+
 enum mlxsw_reg_spms_state mlxsw_sp_stp_spms_state(u8 state)
 {
 	switch (state) {
@@ -648,12 +725,6 @@ static netdev_tx_t mlxsw_sp_port_xmit(struct sk_buff *skb,
 	u64 len;
 	int err;
 
-	if (skb_cow_head(skb, MLXSW_TXHDR_LEN)) {
-		this_cpu_inc(mlxsw_sp_port->pcpu_stats->tx_dropped);
-		dev_kfree_skb_any(skb);
-		return NETDEV_TX_OK;
-	}
-
 	memset(skb->cb, 0, sizeof(struct mlxsw_skb_cb));
 
 	if (mlxsw_core_skb_transmit_busy(mlxsw_sp->core, &tx_info))
@@ -664,7 +735,11 @@ static netdev_tx_t mlxsw_sp_port_xmit(struct sk_buff *skb,
 		return NETDEV_TX_OK;
 	}
 
-	mlxsw_sp_txhdr_construct(skb, &tx_info);
+	err = mlxsw_sp_txhdr_handle(mlxsw_sp->core, mlxsw_sp_port, skb,
+				    &tx_info);
+	if (err)
+		return NETDEV_TX_OK;
+
 	/* TX header is consumed by HW on the way so we shouldn't count its
 	 * bytes as being sent.
 	 */
@@ -2666,6 +2741,7 @@ static const struct mlxsw_sp_ptp_ops mlxsw_sp1_ptp_ops = {
 	.get_stats_count = mlxsw_sp1_get_stats_count,
 	.get_stats_strings = mlxsw_sp1_get_stats_strings,
 	.get_stats	= mlxsw_sp1_get_stats,
+	.txhdr_construct = mlxsw_sp_ptp_txhdr_construct,
 };
 
 static const struct mlxsw_sp_ptp_ops mlxsw_sp2_ptp_ops = {
@@ -2682,6 +2758,24 @@ static const struct mlxsw_sp_ptp_ops mlxsw_sp2_ptp_ops = {
 	.get_stats_count = mlxsw_sp2_get_stats_count,
 	.get_stats_strings = mlxsw_sp2_get_stats_strings,
 	.get_stats	= mlxsw_sp2_get_stats,
+	.txhdr_construct = mlxsw_sp2_ptp_txhdr_construct,
+};
+
+static const struct mlxsw_sp_ptp_ops mlxsw_sp4_ptp_ops = {
+	.clock_init	= mlxsw_sp2_ptp_clock_init,
+	.clock_fini	= mlxsw_sp2_ptp_clock_fini,
+	.init		= mlxsw_sp2_ptp_init,
+	.fini		= mlxsw_sp2_ptp_fini,
+	.receive	= mlxsw_sp2_ptp_receive,
+	.transmitted	= mlxsw_sp2_ptp_transmitted,
+	.hwtstamp_get	= mlxsw_sp2_ptp_hwtstamp_get,
+	.hwtstamp_set	= mlxsw_sp2_ptp_hwtstamp_set,
+	.shaper_work	= mlxsw_sp2_ptp_shaper_work,
+	.get_ts_info	= mlxsw_sp2_ptp_get_ts_info,
+	.get_stats_count = mlxsw_sp2_get_stats_count,
+	.get_stats_strings = mlxsw_sp2_get_stats_strings,
+	.get_stats	= mlxsw_sp2_get_stats,
+	.txhdr_construct = mlxsw_sp_ptp_txhdr_construct,
 };
 
 struct mlxsw_sp_sample_trigger_node {
@@ -3327,7 +3421,7 @@ static int mlxsw_sp4_init(struct mlxsw_core *mlxsw_core,
 	mlxsw_sp->sb_vals = &mlxsw_sp2_sb_vals;
 	mlxsw_sp->sb_ops = &mlxsw_sp3_sb_ops;
 	mlxsw_sp->port_type_speed_ops = &mlxsw_sp2_port_type_speed_ops;
-	mlxsw_sp->ptp_ops = &mlxsw_sp2_ptp_ops;
+	mlxsw_sp->ptp_ops = &mlxsw_sp4_ptp_ops;
 	mlxsw_sp->span_ops = &mlxsw_sp3_span_ops;
 	mlxsw_sp->policer_core_ops = &mlxsw_sp2_policer_core_ops;
 	mlxsw_sp->trap_ops = &mlxsw_sp2_trap_ops;
@@ -3831,6 +3925,7 @@ static struct mlxsw_driver mlxsw_sp1_driver = {
 	.ptp_transmitted		= mlxsw_sp_ptp_transmitted,
 	.txhdr_len			= MLXSW_TXHDR_LEN,
 	.profile			= &mlxsw_sp1_config_profile,
+	.sdq_supports_cqe_v2		= false,
 };
 
 static struct mlxsw_driver mlxsw_sp2_driver = {
@@ -3869,6 +3964,7 @@ static struct mlxsw_driver mlxsw_sp2_driver = {
 	.ptp_transmitted		= mlxsw_sp_ptp_transmitted,
 	.txhdr_len			= MLXSW_TXHDR_LEN,
 	.profile			= &mlxsw_sp2_config_profile,
+	.sdq_supports_cqe_v2		= true,
 };
 
 static struct mlxsw_driver mlxsw_sp3_driver = {
@@ -3907,6 +4003,7 @@ static struct mlxsw_driver mlxsw_sp3_driver = {
 	.ptp_transmitted		= mlxsw_sp_ptp_transmitted,
 	.txhdr_len			= MLXSW_TXHDR_LEN,
 	.profile			= &mlxsw_sp2_config_profile,
+	.sdq_supports_cqe_v2		= true,
 };
 
 static struct mlxsw_driver mlxsw_sp4_driver = {
@@ -3943,6 +4040,7 @@ static struct mlxsw_driver mlxsw_sp4_driver = {
 	.ptp_transmitted		= mlxsw_sp_ptp_transmitted,
 	.txhdr_len			= MLXSW_TXHDR_LEN,
 	.profile			= &mlxsw_sp2_config_profile,
+	.sdq_supports_cqe_v2		= true,
 };
 
 bool mlxsw_sp_port_dev_check(const struct net_device *dev)

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -243,6 +243,10 @@ struct mlxsw_sp_ptp_ops {
 	void (*get_stats_strings)(u8 **p);
 	void (*get_stats)(struct mlxsw_sp_port *mlxsw_sp_port,
 			  u64 *data, int data_index);
+	int (*txhdr_construct)(struct mlxsw_core *mlxsw_core,
+			       struct mlxsw_sp_port *mlxsw_sp_port,
+			       struct sk_buff *skb,
+			       const struct mlxsw_tx_info *tx_info);
 };
 
 static inline struct mlxsw_sp_upper *
@@ -700,6 +704,12 @@ int mlxsw_sp_flow_counter_alloc(struct mlxsw_sp *mlxsw_sp,
 				unsigned int *p_counter_index);
 void mlxsw_sp_flow_counter_free(struct mlxsw_sp *mlxsw_sp,
 				unsigned int counter_index);
+void mlxsw_sp_txhdr_construct(struct sk_buff *skb,
+			      const struct mlxsw_tx_info *tx_info);
+int mlxsw_sp_txhdr_ptp_data_construct(struct mlxsw_core *mlxsw_core,
+				      struct mlxsw_sp_port *mlxsw_sp_port,
+				      struct sk_buff *skb,
+				      const struct mlxsw_tx_info *tx_info);
 bool mlxsw_sp_port_dev_check(const struct net_device *dev);
 struct mlxsw_sp *mlxsw_sp_lower_get(struct net_device *dev);
 struct mlxsw_sp_port *mlxsw_sp_port_dev_lower_find(struct net_device *dev);

drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c

@@ -11,6 +11,7 @@
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
 #include <linux/net_tstamp.h>
+#include <linux/refcount.h>
 
 #include "spectrum.h"
 #include "spectrum_ptp.h"
@@ -39,6 +40,14 @@ struct mlxsw_sp1_ptp_state {
 	u32 gc_cycle;
 };
 
+struct mlxsw_sp2_ptp_state {
+	struct mlxsw_sp_ptp_state common;
+	refcount_t ptp_port_enabled_ref; /* Number of ports with time stamping
+					  * enabled.
+					  */
+	struct hwtstamp_config config;
+};
+
 struct mlxsw_sp1_ptp_key {
 	u16 local_port;
 	u8 message_type;
@@ -85,6 +94,13 @@ mlxsw_sp1_ptp_state(struct mlxsw_sp *mlxsw_sp)
 			    common);
 }
 
+static struct mlxsw_sp2_ptp_state *
+mlxsw_sp2_ptp_state(struct mlxsw_sp *mlxsw_sp)
+{
+	return container_of(mlxsw_sp->ptp_state, struct mlxsw_sp2_ptp_state,
+			    common);
+}
+
 static struct mlxsw_sp1_ptp_clock *
 mlxsw_sp1_ptp_clock(struct ptp_clock_info *ptp)
 {
@@ -328,6 +344,153 @@ void mlxsw_sp1_ptp_clock_fini(struct mlxsw_sp_ptp_clock *clock_common)
 	kfree(clock);
 }
 
+static u64 mlxsw_sp2_ptp_read_utc(struct mlxsw_sp_ptp_clock *clock,
+				  struct ptp_system_timestamp *sts)
+{
+	struct mlxsw_core *mlxsw_core = clock->core;
+	u32 utc_sec1, utc_sec2, utc_nsec;
+
+	utc_sec1 = mlxsw_core_read_utc_sec(mlxsw_core);
+	ptp_read_system_prets(sts);
+	utc_nsec = mlxsw_core_read_utc_nsec(mlxsw_core);
+	ptp_read_system_postts(sts);
+	utc_sec2 = mlxsw_core_read_utc_sec(mlxsw_core);
+
+	if (utc_sec1 != utc_sec2) {
+		/* Wrap around. */
+		ptp_read_system_prets(sts);
+		utc_nsec = mlxsw_core_read_utc_nsec(mlxsw_core);
+		ptp_read_system_postts(sts);
+	}
+
+	return (u64)utc_sec2 * NSEC_PER_SEC + utc_nsec;
+}
+
+static int
+mlxsw_sp2_ptp_phc_settime(struct mlxsw_sp_ptp_clock *clock, u64 nsec)
+{
+	struct mlxsw_core *mlxsw_core = clock->core;
+	char mtutc_pl[MLXSW_REG_MTUTC_LEN];
+	u32 sec, nsec_rem;
+
+	sec = div_u64_rem(nsec, NSEC_PER_SEC, &nsec_rem);
+	mlxsw_reg_mtutc_pack(mtutc_pl,
+			     MLXSW_REG_MTUTC_OPERATION_SET_TIME_IMMEDIATE,
+			     0, sec, nsec_rem, 0);
+	return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtutc), mtutc_pl);
+}
+
+static int mlxsw_sp2_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
+{
+	struct mlxsw_sp_ptp_clock *clock =
+		container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
+	s32 ppb = scaled_ppm_to_ppb(scaled_ppm);
+
+	/* In Spectrum-2 and newer ASICs, the frequency adjustment in MTUTC is
+	 * reversed, positive values mean to decrease the frequency. Adjust the
+	 * sign of PPB to this behavior.
+	 */
+	return mlxsw_sp_ptp_phc_adjfreq(clock, -ppb);
+}
+
+static int mlxsw_sp2_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+	struct mlxsw_sp_ptp_clock *clock =
+		container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
+	struct mlxsw_core *mlxsw_core = clock->core;
+	char mtutc_pl[MLXSW_REG_MTUTC_LEN];
+
+	/* HW time adjustment range is s16. If out of range, set time instead. */
+	if (delta < S16_MIN || delta > S16_MAX) {
+		u64 nsec;
+
+		nsec = mlxsw_sp2_ptp_read_utc(clock, NULL);
+		nsec += delta;
+
+		return mlxsw_sp2_ptp_phc_settime(clock, nsec);
+	}
+
+	mlxsw_reg_mtutc_pack(mtutc_pl,
+			     MLXSW_REG_MTUTC_OPERATION_ADJUST_TIME,
+			     0, 0, 0, delta);
+	return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtutc), mtutc_pl);
+}
+
+static int mlxsw_sp2_ptp_gettimex(struct ptp_clock_info *ptp,
+				  struct timespec64 *ts,
+				  struct ptp_system_timestamp *sts)
+{
+	struct mlxsw_sp_ptp_clock *clock =
+		container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
+	u64 nsec;
+
+	nsec = mlxsw_sp2_ptp_read_utc(clock, sts);
+	*ts = ns_to_timespec64(nsec);
+
+	return 0;
+}
+
+static int mlxsw_sp2_ptp_settime(struct ptp_clock_info *ptp,
+				 const struct timespec64 *ts)
+{
+	struct mlxsw_sp_ptp_clock *clock =
+		container_of(ptp, struct mlxsw_sp_ptp_clock, ptp_info);
+	u64 nsec = timespec64_to_ns(ts);
+
+	return mlxsw_sp2_ptp_phc_settime(clock, nsec);
+}
+
+static const struct ptp_clock_info mlxsw_sp2_ptp_clock_info = {
+	.owner		= THIS_MODULE,
+	.name		= "mlxsw_sp_clock",
+	.max_adj	= MLXSW_REG_MTUTC_MAX_FREQ_ADJ,
+	.adjfine	= mlxsw_sp2_ptp_adjfine,
+	.adjtime	= mlxsw_sp2_ptp_adjtime,
+	.gettimex64	= mlxsw_sp2_ptp_gettimex,
+	.settime64	= mlxsw_sp2_ptp_settime,
+};
+
+struct mlxsw_sp_ptp_clock *
+mlxsw_sp2_ptp_clock_init(struct mlxsw_sp *mlxsw_sp, struct device *dev)
+{
+	struct mlxsw_sp_ptp_clock *clock;
+	int err;
+
+	clock = kzalloc(sizeof(*clock), GFP_KERNEL);
+	if (!clock)
+		return ERR_PTR(-ENOMEM);
+
+	clock->core = mlxsw_sp->core;
+
+	clock->ptp_info = mlxsw_sp2_ptp_clock_info;
+
+	err = mlxsw_sp2_ptp_phc_settime(clock, 0);
+	if (err) {
+		dev_err(dev, "setting UTC time failed %d\n", err);
+		goto err_ptp_phc_settime;
+	}
+
+	clock->ptp = ptp_clock_register(&clock->ptp_info, dev);
+	if (IS_ERR(clock->ptp)) {
+		err = PTR_ERR(clock->ptp);
+		dev_err(dev, "ptp_clock_register failed %d\n", err);
+		goto err_ptp_clock_register;
+	}
+
+	return clock;
+
+err_ptp_clock_register:
+err_ptp_phc_settime:
+	kfree(clock);
+	return ERR_PTR(err);
+}
+
+void mlxsw_sp2_ptp_clock_fini(struct mlxsw_sp_ptp_clock *clock)
+{
+	ptp_clock_unregister(clock->ptp);
+	kfree(clock);
+}
+
 static int mlxsw_sp_ptp_parse(struct sk_buff *skb,
 			      u8 *p_domain_number,
 			      u8 *p_message_type,
@@ -835,10 +998,44 @@ static int mlxsw_sp1_ptp_shaper_params_set(struct mlxsw_sp *mlxsw_sp)
 	return 0;
 }
 
+static int mlxsw_sp_ptp_traps_set(struct mlxsw_sp *mlxsw_sp)
+{
+	u16 event_message_type;
+	int err;
+
+	/* Deliver these message types as PTP0. */
+	event_message_type = BIT(PTP_MSGTYPE_SYNC) |
+			     BIT(PTP_MSGTYPE_DELAY_REQ) |
+			     BIT(PTP_MSGTYPE_PDELAY_REQ) |
+			     BIT(PTP_MSGTYPE_PDELAY_RESP);
+
+	err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0,
+				      event_message_type);
+	if (err)
+		return err;
+
+	/* Everything else is PTP1. */
+	err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1,
+				      ~event_message_type);
+	if (err)
+		goto err_mtptpt1_set;
+
+	return 0;
+
+err_mtptpt1_set:
+	mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
+	return err;
+}
+
+static void mlxsw_sp_ptp_traps_unset(struct mlxsw_sp *mlxsw_sp)
+{
+	mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
+	mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
+}
+
 struct mlxsw_sp_ptp_state *mlxsw_sp1_ptp_init(struct mlxsw_sp *mlxsw_sp)
 {
 	struct mlxsw_sp1_ptp_state *ptp_state;
-	u16 message_type;
 	int err;
 
 	err = mlxsw_sp1_ptp_shaper_params_set(mlxsw_sp);
@@ -857,22 +1054,9 @@ struct mlxsw_sp_ptp_state *mlxsw_sp1_ptp_init(struct mlxsw_sp *mlxsw_sp)
 	if (err)
 		goto err_hashtable_init;
 
-	/* Delive these message types as PTP0. */
-	message_type = BIT(PTP_MSGTYPE_SYNC) |
-		       BIT(PTP_MSGTYPE_DELAY_REQ) |
-		       BIT(PTP_MSGTYPE_PDELAY_REQ) |
-		       BIT(PTP_MSGTYPE_PDELAY_RESP);
-	err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0,
-				      message_type);
+	err = mlxsw_sp_ptp_traps_set(mlxsw_sp);
 	if (err)
-		goto err_mtptpt_set;
-
-	/* Everything else is PTP1. */
-	message_type = ~message_type;
-	err = mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1,
-				      message_type);
-	if (err)
-		goto err_mtptpt1_set;
+		goto err_ptp_traps_set;
 
 	err = mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, true);
 	if (err)
@@ -884,10 +1068,8 @@ struct mlxsw_sp_ptp_state *mlxsw_sp1_ptp_init(struct mlxsw_sp *mlxsw_sp)
 	return &ptp_state->common;
 
 err_fifo_clr:
-	mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
-err_mtptpt1_set:
-	mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
-err_mtptpt_set:
+	mlxsw_sp_ptp_traps_unset(mlxsw_sp);
+err_ptp_traps_set:
 	rhltable_destroy(&ptp_state->unmatched_ht);
 err_hashtable_init:
 	kfree(ptp_state);
@@ -904,8 +1086,7 @@ void mlxsw_sp1_ptp_fini(struct mlxsw_sp_ptp_state *ptp_state_common)
 	cancel_delayed_work_sync(&ptp_state->ht_gc_dw);
 	mlxsw_sp1_ptp_mtpppc_set(mlxsw_sp, 0, 0);
 	mlxsw_sp1_ptp_set_fifo_clr_on_trap(mlxsw_sp, false);
-	mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP1, 0);
-	mlxsw_sp_ptp_mtptpt_set(mlxsw_sp, MLXSW_REG_MTPTPT_TRAP_ID_PTP0, 0);
+	mlxsw_sp_ptp_traps_unset(mlxsw_sp);
 	rhltable_free_and_destroy(&ptp_state->unmatched_ht,
 				  &mlxsw_sp1_ptp_unmatched_free_fn, NULL);
 	kfree(ptp_state);
@@ -1176,3 +1357,354 @@ void mlxsw_sp1_get_stats(struct mlxsw_sp_port *mlxsw_sp_port,
 		*data++ = *(u64 *)(stats + offset);
 	}
 }
+
+struct mlxsw_sp_ptp_state *mlxsw_sp2_ptp_init(struct mlxsw_sp *mlxsw_sp)
+{
+	struct mlxsw_sp2_ptp_state *ptp_state;
+	int err;
+
+	ptp_state = kzalloc(sizeof(*ptp_state), GFP_KERNEL);
+	if (!ptp_state)
+		return ERR_PTR(-ENOMEM);
+
+	ptp_state->common.mlxsw_sp = mlxsw_sp;
+
+	err = mlxsw_sp_ptp_traps_set(mlxsw_sp);
+	if (err)
+		goto err_ptp_traps_set;
+
+	refcount_set(&ptp_state->ptp_port_enabled_ref, 0);
+	return &ptp_state->common;
+
+err_ptp_traps_set:
+	kfree(ptp_state);
+	return ERR_PTR(err);
+}
+
+void mlxsw_sp2_ptp_fini(struct mlxsw_sp_ptp_state *ptp_state_common)
+{
+	struct mlxsw_sp *mlxsw_sp = ptp_state_common->mlxsw_sp;
+	struct mlxsw_sp2_ptp_state *ptp_state;
+
+	ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp);
+
+	mlxsw_sp_ptp_traps_unset(mlxsw_sp);
+	kfree(ptp_state);
+}
+
+static u32 mlxsw_ptp_utc_time_stamp_sec_get(struct mlxsw_core *mlxsw_core,
+					    u8 cqe_ts_sec)
+{
+	u32 utc_sec = mlxsw_core_read_utc_sec(mlxsw_core);
+
+	if (cqe_ts_sec > (utc_sec & 0xff))
+		/* Time stamp above the last bits of UTC (UTC & 0xff) means the
+		 * latter has wrapped after the time stamp was collected.
+		 */
+		utc_sec -= 256;
+
+	utc_sec &= ~0xff;
+	utc_sec |= cqe_ts_sec;
+
+	return utc_sec;
+}
+
+static void mlxsw_sp2_ptp_hwtstamp_fill(struct mlxsw_core *mlxsw_core,
+					const struct mlxsw_skb_cb *cb,
+					struct skb_shared_hwtstamps *hwtstamps)
+{
+	u64 ts_sec, ts_nsec, nsec;
+
+	WARN_ON_ONCE(!cb->cqe_ts.sec && !cb->cqe_ts.nsec);
+
+	/* The time stamp in the CQE is represented by 38 bits, which is a short
+	 * representation of UTC time. Software should create the full time
+	 * stamp using the global UTC clock. The seconds have only 8 bits in the
+	 * CQE, to create the full time stamp, use the current UTC time and fix
+	 * the seconds according to the relation between UTC seconds and CQE
+	 * seconds.
+	 */
+	ts_sec = mlxsw_ptp_utc_time_stamp_sec_get(mlxsw_core, cb->cqe_ts.sec);
+	ts_nsec = cb->cqe_ts.nsec;
+
+	nsec = ts_sec * NSEC_PER_SEC + ts_nsec;
+
+	hwtstamps->hwtstamp = ns_to_ktime(nsec);
+}
+
+void mlxsw_sp2_ptp_receive(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
+			   u16 local_port)
+{
+	struct skb_shared_hwtstamps hwtstamps;
+
+	mlxsw_sp2_ptp_hwtstamp_fill(mlxsw_sp->core, mlxsw_skb_cb(skb),
+				    &hwtstamps);
+	*skb_hwtstamps(skb) = hwtstamps;
+	mlxsw_sp_rx_listener_no_mark_func(skb, local_port, mlxsw_sp);
+}
+
+void mlxsw_sp2_ptp_transmitted(struct mlxsw_sp *mlxsw_sp,
+			       struct sk_buff *skb, u16 local_port)
+{
+	struct skb_shared_hwtstamps hwtstamps;
+
+	mlxsw_sp2_ptp_hwtstamp_fill(mlxsw_sp->core, mlxsw_skb_cb(skb),
+				    &hwtstamps);
+	skb_tstamp_tx(skb, &hwtstamps);
+	dev_kfree_skb_any(skb);
+}
+
+int mlxsw_sp2_ptp_hwtstamp_get(struct mlxsw_sp_port *mlxsw_sp_port,
+			       struct hwtstamp_config *config)
+{
+	struct mlxsw_sp2_ptp_state *ptp_state;
+
+	ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp_port->mlxsw_sp);
+
+	*config = ptp_state->config;
+	return 0;
+}
+
+static int
+mlxsw_sp2_ptp_get_message_types(const struct hwtstamp_config *config,
+				u16 *p_ing_types, u16 *p_egr_types,
+				enum hwtstamp_rx_filters *p_rx_filter)
+{
+	enum hwtstamp_rx_filters rx_filter = config->rx_filter;
+	enum hwtstamp_tx_types tx_type = config->tx_type;
+	u16 ing_types = 0x00;
+	u16 egr_types = 0x00;
+
+	*p_rx_filter = rx_filter;
+
+	switch (rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		ing_types = 0x00;
+		break;
+	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V2_SYNC:
+	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
+	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+	case HWTSTAMP_FILTER_PTP_V2_EVENT:
+		/* In Spectrum-2 and above, all packets get time stamp by
+		 * default and the driver fill the time stamp only for event
+		 * packets. Return all event types even if only specific types
+		 * were required.
+		 */
+		ing_types = 0x0f;
+		*p_rx_filter = HWTSTAMP_FILTER_SOME;
+		break;
+	case HWTSTAMP_FILTER_ALL:
+	case HWTSTAMP_FILTER_SOME:
+	case HWTSTAMP_FILTER_NTP_ALL:
+		return -ERANGE;
+	default:
+		return -EINVAL;
+	}
+
+	switch (tx_type) {
+	case HWTSTAMP_TX_OFF:
+		egr_types = 0x00;
+		break;
+	case HWTSTAMP_TX_ON:
+		egr_types = 0x0f;
+		break;
+	case HWTSTAMP_TX_ONESTEP_SYNC:
+	case HWTSTAMP_TX_ONESTEP_P2P:
+		return -ERANGE;
+	default:
+		return -EINVAL;
+	}
+
+	*p_ing_types = ing_types;
+	*p_egr_types = egr_types;
+	return 0;
+}
+
+static int mlxsw_sp2_ptp_mtpcpc_set(struct mlxsw_sp *mlxsw_sp, bool ptp_trap_en,
+				    u16 ing_types, u16 egr_types)
+{
+	char mtpcpc_pl[MLXSW_REG_MTPCPC_LEN];
+
+	mlxsw_reg_mtpcpc_pack(mtpcpc_pl, false, 0, ptp_trap_en, ing_types,
+			      egr_types);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(mtpcpc), mtpcpc_pl);
+}
+
+static int mlxsw_sp2_ptp_enable(struct mlxsw_sp *mlxsw_sp, u16 ing_types,
+				u16 egr_types,
+				struct hwtstamp_config new_config)
+{
+	struct mlxsw_sp2_ptp_state *ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp);
+	int err;
+
+	err = mlxsw_sp2_ptp_mtpcpc_set(mlxsw_sp, true, ing_types, egr_types);
+	if (err)
+		return err;
+
+	ptp_state->config = new_config;
+	return 0;
+}
+
+static int mlxsw_sp2_ptp_disable(struct mlxsw_sp *mlxsw_sp,
+				 struct hwtstamp_config new_config)
+{
+	struct mlxsw_sp2_ptp_state *ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp);
+	int err;
+
+	err = mlxsw_sp2_ptp_mtpcpc_set(mlxsw_sp, false, 0, 0);
+	if (err)
+		return err;
+
+	ptp_state->config = new_config;
+	return 0;
+}
+
+static int mlxsw_sp2_ptp_configure_port(struct mlxsw_sp_port *mlxsw_sp_port,
+					u16 ing_types, u16 egr_types,
+					struct hwtstamp_config new_config)
+{
+	struct mlxsw_sp2_ptp_state *ptp_state;
+	int err;
+
+	ASSERT_RTNL();
+
+	ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp_port->mlxsw_sp);
+
+	if (refcount_inc_not_zero(&ptp_state->ptp_port_enabled_ref))
+		return 0;
+
+	err = mlxsw_sp2_ptp_enable(mlxsw_sp_port->mlxsw_sp, ing_types,
+				   egr_types, new_config);
+	if (err)
+		return err;
+
+	refcount_set(&ptp_state->ptp_port_enabled_ref, 1);
+
+	return 0;
+}
+
+static int mlxsw_sp2_ptp_deconfigure_port(struct mlxsw_sp_port *mlxsw_sp_port,
+					  struct hwtstamp_config new_config)
+{
+	struct mlxsw_sp2_ptp_state *ptp_state;
+	int err;
+
+	ASSERT_RTNL();
+
+	ptp_state = mlxsw_sp2_ptp_state(mlxsw_sp_port->mlxsw_sp);
+
+	if (!refcount_dec_and_test(&ptp_state->ptp_port_enabled_ref))
+		return 0;
+
+	err = mlxsw_sp2_ptp_disable(mlxsw_sp_port->mlxsw_sp, new_config);
+	if (err)
+		goto err_ptp_disable;
+
+	return 0;
+
+err_ptp_disable:
+	refcount_set(&ptp_state->ptp_port_enabled_ref, 1);
+	return err;
+}
+
+int mlxsw_sp2_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port,
+			       struct hwtstamp_config *config)
+{
+	enum hwtstamp_rx_filters rx_filter;
+	struct hwtstamp_config new_config;
+	u16 new_ing_types, new_egr_types;
+	bool ptp_enabled;
+	int err;
+
+	err = mlxsw_sp2_ptp_get_message_types(config, &new_ing_types,
+					      &new_egr_types, &rx_filter);
+	if (err)
+		return err;
+
+	new_config.flags = config->flags;
+	new_config.tx_type = config->tx_type;
+	new_config.rx_filter = rx_filter;
+
+	ptp_enabled = mlxsw_sp_port->ptp.ing_types ||
+		      mlxsw_sp_port->ptp.egr_types;
+
+	if ((new_ing_types || new_egr_types) && !ptp_enabled) {
+		err = mlxsw_sp2_ptp_configure_port(mlxsw_sp_port, new_ing_types,
+						   new_egr_types, new_config);
+		if (err)
+			return err;
+	} else if (!new_ing_types && !new_egr_types && ptp_enabled) {
+		err = mlxsw_sp2_ptp_deconfigure_port(mlxsw_sp_port, new_config);
+		if (err)
+			return err;
+	}
+
+	mlxsw_sp_port->ptp.ing_types = new_ing_types;
+	mlxsw_sp_port->ptp.egr_types = new_egr_types;
+
+	/* Notify the ioctl caller what we are actually timestamping. */
+	config->rx_filter = rx_filter;
+
+	return 0;
+}
+
+int mlxsw_sp2_ptp_get_ts_info(struct mlxsw_sp *mlxsw_sp,
+			      struct ethtool_ts_info *info)
+{
+	info->phc_index = ptp_clock_index(mlxsw_sp->clock->ptp);
+
+	info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
+				SOF_TIMESTAMPING_RX_HARDWARE |
+				SOF_TIMESTAMPING_RAW_HARDWARE;
+
+	info->tx_types = BIT(HWTSTAMP_TX_OFF) |
+			 BIT(HWTSTAMP_TX_ON);
+
+	info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
+			   BIT(HWTSTAMP_FILTER_PTP_V1_L4_EVENT) |
+			   BIT(HWTSTAMP_FILTER_PTP_V2_EVENT);
+
+	return 0;
+}
+
+int mlxsw_sp_ptp_txhdr_construct(struct mlxsw_core *mlxsw_core,
+				 struct mlxsw_sp_port *mlxsw_sp_port,
+				 struct sk_buff *skb,
+				 const struct mlxsw_tx_info *tx_info)
+{
+	mlxsw_sp_txhdr_construct(skb, tx_info);
+	return 0;
+}
+
+int mlxsw_sp2_ptp_txhdr_construct(struct mlxsw_core *mlxsw_core,
+				  struct mlxsw_sp_port *mlxsw_sp_port,
+				  struct sk_buff *skb,
+				  const struct mlxsw_tx_info *tx_info)
+{
+	/* In Spectrum-2 and Spectrum-3, in order for PTP event packets to have
+	 * their correction field correctly set on the egress port they must be
+	 * transmitted as data packets. Such packets ingress the ASIC via the
+	 * CPU port and must have a VLAN tag, as the CPU port is not configured
+	 * with a PVID. Push the default VLAN (4095), which is configured as
+	 * egress untagged on all the ports.
+	 */
+	if (!skb_vlan_tagged(skb)) {
+		skb = vlan_insert_tag_set_proto(skb, htons(ETH_P_8021Q),
+						MLXSW_SP_DEFAULT_VID);
+		if (!skb) {
+			this_cpu_inc(mlxsw_sp_port->pcpu_stats->tx_dropped);
+			return -ENOMEM;
+		}
+	}
+
+	return mlxsw_sp_txhdr_ptp_data_construct(mlxsw_core, mlxsw_sp_port, skb,
+						 tx_info);
+}

drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.h

@@ -57,6 +57,40 @@ void mlxsw_sp1_get_stats_strings(u8 **p);
 void mlxsw_sp1_get_stats(struct mlxsw_sp_port *mlxsw_sp_port,
 			 u64 *data, int data_index);
 
+int mlxsw_sp_ptp_txhdr_construct(struct mlxsw_core *mlxsw_core,
+				 struct mlxsw_sp_port *mlxsw_sp_port,
+				 struct sk_buff *skb,
+				 const struct mlxsw_tx_info *tx_info);
+
+struct mlxsw_sp_ptp_clock *
+mlxsw_sp2_ptp_clock_init(struct mlxsw_sp *mlxsw_sp, struct device *dev);
+
+void mlxsw_sp2_ptp_clock_fini(struct mlxsw_sp_ptp_clock *clock);
+
+struct mlxsw_sp_ptp_state *mlxsw_sp2_ptp_init(struct mlxsw_sp *mlxsw_sp);
+
+void mlxsw_sp2_ptp_fini(struct mlxsw_sp_ptp_state *ptp_state);
+
+void mlxsw_sp2_ptp_receive(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb,
+			   u16 local_port);
+
+void mlxsw_sp2_ptp_transmitted(struct mlxsw_sp *mlxsw_sp,
+			       struct sk_buff *skb, u16 local_port);
+
+int mlxsw_sp2_ptp_hwtstamp_get(struct mlxsw_sp_port *mlxsw_sp_port,
+			       struct hwtstamp_config *config);
+
+int mlxsw_sp2_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port,
+			       struct hwtstamp_config *config);
+
+int mlxsw_sp2_ptp_get_ts_info(struct mlxsw_sp *mlxsw_sp,
+			      struct ethtool_ts_info *info);
+
+int mlxsw_sp2_ptp_txhdr_construct(struct mlxsw_core *mlxsw_core,
+				  struct mlxsw_sp_port *mlxsw_sp_port,
+				  struct sk_buff *skb,
+				  const struct mlxsw_tx_info *tx_info);
+
 #else
 
 static inline struct mlxsw_sp_ptp_clock *
@@ -136,7 +170,14 @@ static inline void mlxsw_sp1_get_stats(struct mlxsw_sp_port *mlxsw_sp_port,
 				       u64 *data, int data_index)
 {
 }
-#endif
+
+int mlxsw_sp_ptp_txhdr_construct(struct mlxsw_core *mlxsw_core,
+				 struct mlxsw_sp_port *mlxsw_sp_port,
+				 struct sk_buff *skb,
+				 const struct mlxsw_tx_info *tx_info)
+{
+	return -EOPNOTSUPP;
+}
 
 static inline struct mlxsw_sp_ptp_clock *
 mlxsw_sp2_ptp_clock_init(struct mlxsw_sp *mlxsw_sp, struct device *dev)
@@ -184,16 +225,25 @@ mlxsw_sp2_ptp_hwtstamp_set(struct mlxsw_sp_port *mlxsw_sp_port,
 	return -EOPNOTSUPP;
 }
 
-static inline void mlxsw_sp2_ptp_shaper_work(struct work_struct *work)
-{
-}
-
 static inline int mlxsw_sp2_ptp_get_ts_info(struct mlxsw_sp *mlxsw_sp,
 					    struct ethtool_ts_info *info)
 {
 	return mlxsw_sp_ptp_get_ts_info_noptp(info);
 }
 
+int mlxsw_sp2_ptp_txhdr_construct(struct mlxsw_core *mlxsw_core,
+				  struct mlxsw_sp_port *mlxsw_sp_port,
+				  struct sk_buff *skb,
+				  const struct mlxsw_tx_info *tx_info)
+{
+	return -EOPNOTSUPP;
+}
+#endif
+
+static inline void mlxsw_sp2_ptp_shaper_work(struct work_struct *work)
+{
+}
+
 static inline int mlxsw_sp2_get_stats_count(void)
 {
 	return 0;