The patch implements the dev_ops "stats_reset" for VF.

Signed-off-by: Qi Zhang <qi.z.zh...@intel.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 34 ++++++++++++++++++++++++++++++++++
 drivers/net/i40e/i40e_pf.c        | 25 +++++++++++++++++++++++++
 drivers/net/i40e/i40e_pf.h        |  1 +
 3 files changed, 60 insertions(+)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c 
b/drivers/net/i40e/i40e_ethdev_vf.c
index 55fd344..5155b25 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -110,6 +110,7 @@ static int i40evf_dev_link_update(struct rte_eth_dev *dev,
                                  __rte_unused int wait_to_complete);
 static void i40evf_dev_stats_get(struct rte_eth_dev *dev,
                                struct rte_eth_stats *stats);
+static void i40evf_dev_stats_reset(struct rte_eth_dev *dev);
 static int i40evf_dev_xstats_get(struct rte_eth_dev *dev,
                                 struct rte_eth_xstat *xstats, unsigned n);
 static int i40evf_dev_xstats_get_names(struct rte_eth_dev *dev,
@@ -199,6 +200,7 @@ static const struct eth_dev_ops i40evf_eth_dev_ops = {
        .allmulticast_disable = i40evf_dev_allmulticast_disable,
        .link_update          = i40evf_dev_link_update,
        .stats_get            = i40evf_dev_stats_get,
+       .stats_reset          = i40evf_dev_stats_reset,
        .xstats_get           = i40evf_dev_xstats_get,
        .xstats_get_names     = i40evf_dev_xstats_get_names,
        .xstats_reset         = i40evf_dev_xstats_reset,
@@ -988,6 +990,27 @@ i40evf_get_statistics(struct rte_eth_dev *dev, struct 
rte_eth_stats *stats)
        return 0;
 }
 
+static int
+i40evf_reset_statistics(struct rte_eth_dev *dev)
+{
+       struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
+       int err;
+       struct vf_cmd_info args;
+       u16 vsi_id = vf->vsi_res->vsi_id;
+
+       args.ops = (enum i40e_virtchnl_ops)I40E_VIRTCHNL_OP_RESET_STATS;
+       args.in_args = (uint8_t *)&vsi_id;
+       args.in_args_size = sizeof(vsi_id);
+       args.out_buffer = vf->aq_resp;
+       args.out_size = I40E_AQ_BUF_SZ;
+
+       err = i40evf_execute_vf_cmd(dev, &args);
+       if (err)
+               PMD_DRV_LOG(ERR, "fail to execute command CFG_VLAN_OFFLOAD");
+
+       return err;
+}
+
 static void
 i40evf_dev_xstats_reset(struct rte_eth_dev *dev)
 {
@@ -2310,6 +2333,17 @@ i40evf_dev_stats_get(struct rte_eth_dev *dev, struct 
rte_eth_stats *stats)
 }
 
 static void
+i40evf_dev_stats_reset(struct rte_eth_dev *dev)
+{
+       struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
+       /* only DPDK PF support this */
+       if (vf->version_major == I40E_DPDK_VERSION_MAJOR) {
+               if (i40evf_reset_statistics(dev))
+                       PMD_DRV_LOG(ERR, "Reset statistics failed");
+       }
+}
+
+static void
 i40evf_dev_close(struct rte_eth_dev *dev)
 {
        struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
diff --git a/drivers/net/i40e/i40e_pf.c b/drivers/net/i40e/i40e_pf.c
index f771dfb..62d2bfd 100644
--- a/drivers/net/i40e/i40e_pf.c
+++ b/drivers/net/i40e/i40e_pf.c
@@ -1155,6 +1155,27 @@ i40e_pf_host_process_cmd_cfg_pvid(struct i40e_pf_vf *vf,
        return ret;
 }
 
+static int
+i40e_pf_host_process_cmd_reset_stats(struct i40e_pf_vf *vf,
+                                       bool b_op)
+{
+       vf->vsi->offset_loaded = false;
+       i40e_update_vsi_stats(vf->vsi);
+
+       if (b_op)
+               i40e_pf_host_send_msg_to_vf(vf, I40E_VIRTCHNL_OP_RESET_STATS,
+                                           I40E_SUCCESS,
+                                           NULL,
+                                           0);
+       else
+               i40e_pf_host_send_msg_to_vf(vf, I40E_VIRTCHNL_OP_RESET_STATS,
+                                           I40E_NOT_SUPPORTED,
+                                           NULL,
+                                           0);
+
+       return I40E_SUCCESS;
+}
+
 void
 i40e_notify_vf_link_status(struct rte_eth_dev *dev, struct i40e_pf_vf *vf)
 {
@@ -1300,6 +1321,10 @@ i40e_pf_host_handle_vf_msg(struct rte_eth_dev *dev,
                PMD_DRV_LOG(INFO, "OP_CFG_VLAN_PVID received");
                i40e_pf_host_process_cmd_cfg_pvid(vf, msg, msglen, b_op);
                break;
+       case I40E_VIRTCHNL_OP_RESET_STATS:
+               PMD_DRV_LOG(INFO, "OP_RESET_STATS received");
+               i40e_pf_host_process_cmd_reset_stats(vf, b_op);
+               break;
        /* Don't add command supported below, which will
         * return an error code.
         */
diff --git a/drivers/net/i40e/i40e_pf.h b/drivers/net/i40e/i40e_pf.h
index b4c2287..69ef873 100644
--- a/drivers/net/i40e/i40e_pf.h
+++ b/drivers/net/i40e/i40e_pf.h
@@ -58,6 +58,7 @@ enum i40e_virtchnl_ops_dpdk {
                                                I40E_DPDK_OFFSET,
        I40E_VIRTCHNL_OP_CFG_VLAN_PVID,
        I40E_VIRTCHNL_OP_CONFIG_VSI_QUEUES_EXT,
+       I40E_VIRTCHNL_OP_RESET_STATS,
 };
 
 /* A structure to support extended info of a receive queue. */
-- 
2.7.4

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