[PATCH v2] net/iavf: add clock read support

[Anurag Mandal]

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>
---
V2: Addressed minor typo

 drivers/net/intel/iavf/iavf.h        |  1 +
 drivers/net/intel/iavf/iavf_ethdev.c | 24 ++++++++++++++++++++++++
 drivers/net/intel/iavf/iavf_vchnl.c  | 13 ++++++++++---
 3 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/drivers/net/intel/iavf/iavf.h b/drivers/net/intel/iavf/iavf.h
index 293adaf6c9..416625d9fb 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);
+int iavf_phc_get_time(struct iavf_adapter *adapter, uint64_t *time);
 #endif /* _IAVF_ETHDEV_H_ */
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