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sfc: support PTP over Ethernet

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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: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: Íñigo Huguet <ihuguet@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Íñigo Huguet 2022-09-05 10:23:23 +02:00 committed by David S. Miller
parent 621918c45f
commit e4616f6472
1 changed files with 19 additions and 2 deletions
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21
drivers/net/ethernet/sfc/ptp.c
View File

@ -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;