[PATCH] net/iavf: add clock read support

[Mandal, Anurag]

Recheck-request: rebase=next-net-intel, iol-unit-arm64-testing intel-Functional

Thank you.

Regards,
Anurag M

> -----Original Message-----
> From: Mandal, Anurag <anurag.mandal at intel.com>
> Sent: 27 July 2026 15:55
> To: dev at dpdk.org
> Cc: Richardson, Bruce <bruce.richardson at intel.com>; Medvedkin, Vladimir
> <vladimir.medvedkin at intel.com>; Mandal, Anurag
> <anurag.mandal at intel.com>
> Subject: [PATCH] net/iavf: add clock read support
> 
> Implemented read_clock ethdev operation by adding
> iavf_dev_read_clock() feature to get current time in nanoseconds for
> scheduling packets based on transmit time.
> 
> Signed-off-by: Anurag Mandal <anurag.mandal at intel.com>
> ---
>  drivers/net/intel/iavf/iavf.h        |  3 ++-
>  drivers/net/intel/iavf/iavf_ethdev.c | 24 ++++++++++++++++++++++++
> drivers/net/intel/iavf/iavf_vchnl.c  | 13 ++++++++++---
>  3 files changed, 36 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/intel/iavf/iavf.h b/drivers/net/intel/iavf/iavf.h index
> 293adaf6c9..cf2b6596d5 100644
> --- a/drivers/net/intel/iavf/iavf.h
> +++ b/drivers/net/intel/iavf/iavf.h
> @@ -533,4 +533,5 @@ void iavf_handle_hw_reset(struct rte_eth_dev *dev,
> bool vf_initiated_reset);  void iavf_set_no_poll(struct iavf_adapter *adapter,
> bool link_change);  bool is_iavf_supported(struct rte_eth_dev *dev);  void
> iavf_hash_uninit(struct iavf_adapter *ad); -#endif /* _IAVF_ETHDEV_H_ */
> +int iavf_phc_get_time(struct iavf_adapter *adapter, uint64_t *time);
> +#endif /* _IAVF_ETHDEV_H_ u*/
> diff --git a/drivers/net/intel/iavf/iavf_ethdev.c
> b/drivers/net/intel/iavf/iavf_ethdev.c
> index e475b64971..1a36885107 100644
> --- a/drivers/net/intel/iavf/iavf_ethdev.c
> +++ b/drivers/net/intel/iavf/iavf_ethdev.c
> @@ -165,6 +165,7 @@ static int iavf_set_mc_addr_list(struct rte_eth_dev
> *dev,
>  			struct rte_ether_addr *mc_addrs,
>  			uint32_t mc_addrs_num);
>  static int iavf_tm_ops_get(struct rte_eth_dev *dev __rte_unused, void *arg);
> +static int iavf_dev_read_clock(struct rte_eth_dev *dev, uint64_t
> +*clock);
> 
>  static const struct rte_pci_id pci_id_iavf_map[] = {
>  	{ RTE_PCI_DEVICE(IAVF_INTEL_VENDOR_ID,
> IAVF_DEV_ID_ADAPTIVE_VF) }, @@ -264,6 +265,7 @@ static const struct
> eth_dev_ops iavf_eth_dev_ops = {
>  	.tx_done_cleanup	    = iavf_dev_tx_done_cleanup,
>  	.get_monitor_addr           = iavf_get_monitor_addr,
>  	.tm_ops_get                 = iavf_tm_ops_get,
> +	.read_clock                 = iavf_dev_read_clock,
>  };
> 
>  static int
> @@ -3662,6 +3664,28 @@ bool is_iavf_supported(struct rte_eth_dev *dev)
>  	return !strcmp(dev->device->driver->name,
> rte_iavf_pmd.driver.name);  }
> 
> +static int
> +iavf_dev_read_clock(struct rte_eth_dev *dev, uint64_t *clock) {
> +	struct iavf_adapter *adapter =
> +		IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
> +	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(adapter);
> +	int ret;
> +
> +	if (adapter->closed)
> +		return -EIO;
> +
> +	if (!(vf->vf_res->vf_cap_flags & VIRTCHNL_VF_CAP_PTP) ||
> +	    !(vf->ptp_caps & VIRTCHNL_1588_PTP_CAP_READ_PHC))
> +		return -ENOTSUP;
> +
> +	ret = iavf_phc_get_time(adapter, clock);
> +	if (ret != 0)
> +		return -EIO;
> +
> +	return 0;
> +}
> +
>  RTE_PMD_REGISTER_PCI(net_iavf, rte_iavf_pmd);
> RTE_PMD_REGISTER_PCI_TABLE(net_iavf, pci_id_iavf_map);
> RTE_PMD_REGISTER_KMOD_DEP(net_iavf, "* igb_uio | vfio-pci"); diff --git
> a/drivers/net/intel/iavf/iavf_vchnl.c b/drivers/net/intel/iavf/iavf_vchnl.c
> index f346837bf1..a63639549c 100644
> --- a/drivers/net/intel/iavf/iavf_vchnl.c
> +++ b/drivers/net/intel/iavf/iavf_vchnl.c
> @@ -2521,9 +2521,8 @@ iavf_get_ptp_cap(struct iavf_adapter *adapter)  }
> 
>  int
> -iavf_get_phc_time(struct ci_rx_queue *rxq)
> +iavf_phc_get_time(struct iavf_adapter *adapter, uint64_t *time)
>  {
> -	struct iavf_adapter *adapter = rxq->iavf_vsi->adapter;
>  	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(adapter);
>  	uint8_t msg_buf[IAVF_AQ_BUF_SZ] = {0};
>  	struct virtchnl_phc_time phc_time;
> @@ -2543,9 +2542,17 @@ iavf_get_phc_time(struct ci_rx_queue *rxq)
>  			    "Failed to execute command of
> VIRTCHNL_OP_1588_PTP_GET_TIME");
>  		goto out;
>  	}
> -	rxq->phc_time = ((struct virtchnl_phc_time *)args.out_buffer)->time;
> +	*time = ((struct virtchnl_phc_time *)args.out_buffer)->time;
> 
>  out:
>  	rte_spinlock_unlock(&vf->phc_time_aq_lock);
>  	return err;
>  }
> +
> +int
> +iavf_get_phc_time(struct ci_rx_queue *rxq) {
> +	struct iavf_adapter *adapter = rxq->iavf_vsi->adapter;
> +
> +	return iavf_phc_get_time(adapter, &rxq->phc_time); }
> --
> 2.34.1