[dpdk-dev] [RFC 02/10] net/i40e: add API to get received packet count

[David Hunt <david.hunt@intel.com>]

Signed-off-by: Nemanja Marjanovic <nemanja.marjanovic@intel.com>
Signed-off-by: Rory Sexton <rory.sexton@intel.com>
Signed-off-by: David Hunt <david.hunt@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c |  1 +
 drivers/net/i40e/i40e_rxtx.c   | 10 ++++++++++
 drivers/net/i40e/i40e_rxtx.h   |  1 +
 lib/librte_ether/rte_ethdev.h  | 19 +++++++++++++++++++
 4 files changed, 31 insertions(+)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 8fb67d8..d9806fc 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -446,6 +446,7 @@ static const struct rte_pci_id pci_id_i40e_map[] = {
 
 static const struct eth_dev_ops i40e_eth_dev_ops = {
 	.vfid_to_pfid                 = i40e_vf_mac_to_vsi,
+	.read_pf_stats                = i40e_vsi_stats_read,
 	.dev_configure                = i40e_dev_configure,
 	.dev_start                    = i40e_dev_start,
 	.dev_stop                     = i40e_dev_stop,
diff --git a/drivers/net/i40e/i40e_rxtx.c b/drivers/net/i40e/i40e_rxtx.c
index 1379d5e..cc036b7 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -833,6 +833,16 @@ i40e_vf_mac_to_vsi(struct rte_eth_dev *dev, uint64_t vfid) {
 	return -1;
 }
 
+uint64_t
+i40e_vsi_stats_read(struct rte_eth_dev *dev, uint8_t vsi_id) {
+	struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+
+	uint64_t glv_uprch = I40E_READ_REG(hw,
+			I40E_GLV_UPRCH(vsi_id)) && 0x0000FFFF;
+	uint64_t glv_uprcl = I40E_READ_REG(hw, I40E_GLV_UPRCL(vsi_id));
+	return glv_uprcl + (glv_uprch << 32);
+}
+
 uint16_t
 i40e_recv_scattered_pkts(void *rx_queue,
 			 struct rte_mbuf **rx_pkts,
diff --git a/drivers/net/i40e/i40e_rxtx.h b/drivers/net/i40e/i40e_rxtx.h
index bc6d355..db19153 100644
--- a/drivers/net/i40e/i40e_rxtx.h
+++ b/drivers/net/i40e/i40e_rxtx.h
@@ -193,6 +193,7 @@ union i40e_tx_offload {
 };
 
 uint64_t i40e_vf_mac_to_vsi(struct rte_eth_dev *dev, uint64_t vfid);
+uint64_t i40e_vsi_stats_read(struct rte_eth_dev *dev, uint8_t vsi_id);
 int i40e_dev_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id);
 int i40e_dev_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id);
 int i40e_dev_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id);
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index fec7e92..4917233 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1413,6 +1413,9 @@ typedef int (*eth_l2_tunnel_offload_set_t)
 
 typedef uint64_t  (*vfid_to_pfid)(struct rte_eth_dev *dev,
 				uint64_t vfid);
+/**< @internal Ethernet device configuration. */
+typedef uint64_t  (*read_pf_stats)(struct rte_eth_dev *dev, uint8_t pfid);
+
 
 typedef int (*eth_filter_ctrl_t)(struct rte_eth_dev *dev,
 				 enum rte_filter_type filter_type,
@@ -1432,6 +1435,7 @@ typedef int (*eth_get_dcb_info)(struct rte_eth_dev *dev,
  */
 struct eth_dev_ops {
 	vfid_to_pfid               vfid_to_pfid;  /**< Convert vfid to pfid */
+	read_pf_stats              read_pf_stats;/**<Read low-level pf stats .*/
 	eth_dev_configure_t        dev_configure; /**< Configure device. */
 	eth_dev_start_t            dev_start;     /**< Start device. */
 	eth_dev_stop_t             dev_stop;      /**< Stop device. */
@@ -2939,6 +2943,21 @@ vfid_to_pfid_direct(uint8_t port_id, uint64_t vfid)
 	return pfid;
 }
 
+/*
+ * Reads the NIC occupancy if possible with device in use.
+ * @param port_id
+ *  The port identifier of the Ethernet device.
+ * @return
+ *  Nic occupany in bytes.
+ */
+static inline uint64_t
+read_pf_stats_direct(uint8_t port_id, uint8_t pfid)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	uint64_t pkt_count = (*dev->dev_ops->read_pf_stats)(dev, pfid);
+	return pkt_count;
+}
+
 /**
  * Send a burst of output packets on a transmit queue of an Ethernet device.
  *
-- 
2.7.4