[dpdk-dev] [RFC 01/10] net/i40e: add API to convert VF Id to PF Id

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

Need a way to convert a vf id to a pf id on the host so as to query the pf
for relevant statistics which are used for the frequency changes in the
vm_power_manager app. Used when profiles are passed down from the guest
to the host, allowing the host to map the vfs to pfs.

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   | 27 +++++++++++++++++++++++++++
 drivers/net/i40e/i40e_rxtx.h   |  1 +
 lib/librte_ether/rte_ethdev.h  | 11 +++++++++++
 4 files changed, 40 insertions(+)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 5f26e24..8fb67d8 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -445,6 +445,7 @@ 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,
 	.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 d42c23c..1379d5e 100644
--- a/drivers/net/i40e/i40e_rxtx.c
+++ b/drivers/net/i40e/i40e_rxtx.c
@@ -806,6 +806,33 @@ i40e_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
 	return nb_rx;
 }
 
+uint64_t
+i40e_vf_mac_to_vsi(struct rte_eth_dev *dev, uint64_t vfid) {
+	struct ether_addr *vf_mac_addr = (struct ether_addr *)&vfid;
+	struct ether_addr *mac;
+	struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+	int vsi_id = 0, i, x;
+	struct i40e_pf_vf *vf;
+	uint16_t vf_num = pf->vf_num;
+
+	for (x = 0; x < vf_num; x++) {
+		int mac_addr_matches = 1;
+		vf = &pf->vfs[x];
+		mac = &vf->mac_addr;
+
+		for (i = 0; i < ETHER_ADDR_LEN; i++) {
+			if (mac->addr_bytes[i] != vf_mac_addr->addr_bytes[i])
+				mac_addr_matches = 0;
+		}
+		if (mac_addr_matches) {
+			vsi_id = vf->vsi->vsi_id;
+			return vsi_id;
+		}
+	}
+
+	return -1;
+}
+
 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 20084d6..bc6d355 100644
--- a/drivers/net/i40e/i40e_rxtx.h
+++ b/drivers/net/i40e/i40e_rxtx.h
@@ -192,6 +192,7 @@ union i40e_tx_offload {
 	};
 };
 
+uint64_t i40e_vf_mac_to_vsi(struct rte_eth_dev *dev, uint64_t vfid);
 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 0adf327..fec7e92 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1411,6 +1411,8 @@ typedef int (*eth_l2_tunnel_offload_set_t)
 	 uint8_t en);
 /**< @internal enable/disable the l2 tunnel offload functions */
 
+typedef uint64_t  (*vfid_to_pfid)(struct rte_eth_dev *dev,
+				uint64_t vfid);
 
 typedef int (*eth_filter_ctrl_t)(struct rte_eth_dev *dev,
 				 enum rte_filter_type filter_type,
@@ -1429,6 +1431,7 @@ typedef int (*eth_get_dcb_info)(struct rte_eth_dev *dev,
  * @internal A structure containing the functions exported by an Ethernet driver.
  */
 struct eth_dev_ops {
+	vfid_to_pfid               vfid_to_pfid;  /**< Convert vfid to pfid */
 	eth_dev_configure_t        dev_configure; /**< Configure device. */
 	eth_dev_start_t            dev_start;     /**< Start device. */
 	eth_dev_stop_t             dev_stop;      /**< Stop device. */
@@ -2928,6 +2931,14 @@ static inline int rte_eth_tx_descriptor_status(uint8_t port_id,
 	return (*dev->dev_ops->tx_descriptor_status)(txq, offset);
 }
 
+static inline uint64_t
+vfid_to_pfid_direct(uint8_t port_id, uint64_t vfid)
+{
+	struct rte_eth_dev *dev = &rte_eth_devices[port_id];
+	uint64_t pfid  = (*dev->dev_ops->vfid_to_pfid)(dev, vfid);
+	return pfid;
+}
+
 /**
  * Send a burst of output packets on a transmit queue of an Ethernet device.
  *
-- 
2.7.4