[xdp-hints] Re: [PATCH RESEND bpf-next 06/15] ice: Support HW timestamp hint

[Jesper Dangaard Brouer <jbrouer@redhat.com>]

On 12/05/2023 20.19, Stanislav Fomichev wrote:
>> diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
>> index 2515f5f7a2b6..e9589cadf811 100644
>> --- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
>> +++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
>> @@ -537,3 +537,25 @@ void ice_finalize_xdp_rx(struct ice_tx_ring *xdp_ring, unsigned int xdp_res,
>>   			spin_unlock(&xdp_ring->tx_lock);
>>   	}
>>   }
>> +
>> +/**
>> + * ice_xdp_rx_hw_ts - HW timestamp XDP hint handler
>> + * @ctx: XDP buff pointer
>> + * @ts_ns: destination address
>> + *
>> + * Copy HW timestamp (if available) to the destination address.
>> + */
>> +static int ice_xdp_rx_hw_ts(const struct xdp_md *ctx, u64 *ts_ns)
>> +{
>> +	const struct ice_xdp_buff *xdp_ext = (void *)ctx;
>> +
>> +	if (!ice_ptp_copy_rx_hwts_from_desc(xdp_ext->rx_ring,
>> +					    xdp_ext->eop_desc, ts_ns))
>> +		return -EOPNOTSUPP;
> Per Jesper's recent update, should this be ENODATA?
> 

Yes, please :-)

https://git.kernel.org/torvalds/c/915efd8a446b ("xdp: bpf_xdp_metadata 
use EOPNOTSUPP for no driver support")

--Jesper