Commit e4616f64 authored by Íñigo Huguet's avatar Íñigo Huguet Committed by David S. Miller
Browse files

sfc: support PTP over Ethernet 



The previous patch add support for PTP over IPv6/UDP (only for 8000
series and newer) and this one add support for PTP over 802.3.

Tested: sync as master and as slave is correct with ptp4l. PTP over IPv4
and IPv6 still works fine.

Suggested-by: default avatarEdward Cree <ecree.xilinx@gmail.com>
Signed-off-by: default avatarÍñigo Huguet <ihuguet@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 621918c4

drivers/net/ethernet/sfc/ptp.c

+19 −2
Original line number Diff line number Diff line
@@ -118,13 +118,14 @@ 


#define	PTP_MIN_LENGTH		63



#define PTP_RXFILTERS_LEN	4

#define PTP_RXFILTERS_LEN	5



#define PTP_ADDR_IPV4		0xe0000181	/* 224.0.1.129 */

#define PTP_ADDR_IPV6		{0xff, 0x0e, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \

				0, 0x01, 0x81}	/* ff0e::181 */

#define PTP_EVENT_PORT		319

#define PTP_GENERAL_PORT	320

#define PTP_ADDR_ETHER		{0x01, 0x1b, 0x19, 0, 0, 0} /* 01-1B-19-00-00-00 */



/* Annoyingly the format of the version numbers are different between

 * versions 1 and 2 so it isn't possible to simply look for 1 or 2.
@@ -1342,6 +1343,18 @@ static int efx_ptp_insert_ipv6_filter(struct efx_nic *efx, u16 port) 
	return efx_ptp_insert_filter(efx, &rxfilter);

}



static int efx_ptp_insert_eth_filter(struct efx_nic *efx)

{

	const u8 addr[ETH_ALEN] = PTP_ADDR_ETHER;

	struct efx_filter_spec rxfilter;



	efx_ptp_init_filter(efx, &rxfilter);

	efx_filter_set_eth_local(&rxfilter, EFX_FILTER_VID_UNSPEC, addr);

	rxfilter.match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;

	rxfilter.ether_type = htons(ETH_P_1588);

	return efx_ptp_insert_filter(efx, &rxfilter);

}



static int efx_ptp_insert_multicast_filters(struct efx_nic *efx)

{

	struct efx_ptp_data *ptp = efx->ptp_data;
@@ -1362,7 +1375,7 @@ static int efx_ptp_insert_multicast_filters(struct efx_nic *efx) 
		goto fail;



	/* if the NIC supports hw timestamps by the MAC, we can support

	 * PTP over IPv6

	 * PTP over IPv6 and Ethernet

	 */

	if (efx_ptp_use_mac_tx_timestamps(efx)) {

		rc = efx_ptp_insert_ipv6_filter(efx, PTP_EVENT_PORT);
@@ -1372,6 +1385,10 @@ static int efx_ptp_insert_multicast_filters(struct efx_nic *efx) 
		rc = efx_ptp_insert_ipv6_filter(efx, PTP_GENERAL_PORT);

		if (rc < 0)

			goto fail;



		rc = efx_ptp_insert_eth_filter(efx);

		if (rc < 0)

			goto fail;

	}



	return 0;