i40e: Enable VF Tx bandwidth setting

Implement the net device op for Tx bandwidth setting. Setting the Tx
bandwidth is done by 'ip link set <PF device> vf <VF num> rate <Tx
rate>', with the rate specified in Mbit/sec. The rate setting is
displayed with 'ip link show'.

Change-ID: I4d45dda8320632fdb6ec92c87d083e51070b46ab
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Acked-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_common.c b/drivers/net/ethernet/intel/i40e/i40e_common.c
index 922cdcc..f8dfb4b 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_common.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_common.c
@@ -2253,6 +2253,35 @@ static i40e_status i40e_aq_tx_sched_cmd(struct i40e_hw *hw, u16 seid,
 }
 
 /**
+ * i40e_aq_config_vsi_bw_limit - Configure VSI BW Limit
+ * @hw: pointer to the hw struct
+ * @seid: VSI seid
+ * @credit: BW limit credits (0 = disabled)
+ * @max_credit: Max BW limit credits
+ * @cmd_details: pointer to command details structure or NULL
+ **/
+i40e_status i40e_aq_config_vsi_bw_limit(struct i40e_hw *hw,
+                               u16 seid, u16 credit, u8 max_credit,
+                               struct i40e_asq_cmd_details *cmd_details)
+{
+       struct i40e_aq_desc desc;
+       struct i40e_aqc_configure_vsi_bw_limit *cmd =
+               (struct i40e_aqc_configure_vsi_bw_limit *)&desc.params.raw;
+       i40e_status status;
+
+       i40e_fill_default_direct_cmd_desc(&desc,
+                                         i40e_aqc_opc_configure_vsi_bw_limit);
+
+       cmd->vsi_seid = cpu_to_le16(seid);
+       cmd->credit = cpu_to_le16(credit);
+       cmd->max_credit = max_credit;
+
+       status = i40e_asq_send_command(hw, &desc, NULL, 0, cmd_details);
+
+       return status;
+}
+
+/**
  * i40e_aq_config_vsi_tc_bw - Config VSI BW Allocation per TC
  * @hw: pointer to the hw struct
  * @seid: VSI seid

diff --git a/drivers/net/ethernet/intel/i40e/i40e_prototype.h b/drivers/net/ethernet/intel/i40e/i40e_prototype.h
index 9cd57e6..10652f6 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_prototype.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_prototype.h
@@ -167,6 +167,9 @@ i40e_status i40e_aq_delete_element(struct i40e_hw *hw, u16 seid,
 i40e_status i40e_aq_mac_address_write(struct i40e_hw *hw,
                                    u16 flags, u8 *mac_addr,
                                    struct i40e_asq_cmd_details *cmd_details);
+i40e_status i40e_aq_config_vsi_bw_limit(struct i40e_hw *hw,
+                               u16 seid, u16 credit, u8 max_credit,
+                               struct i40e_asq_cmd_details *cmd_details);
 i40e_status i40e_aq_dcb_updated(struct i40e_hw *hw,
                                struct i40e_asq_cmd_details *cmd_details);
 i40e_status i40e_aq_set_hmc_resource_profile(struct i40e_hw *hw,

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index e3e4df0..5421714 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -434,6 +434,15 @@ static int i40e_alloc_vsi_res(struct i40e_vf *vf, enum i40e_vsi_type type)
        if (ret)
                dev_err(&pf->pdev->dev, "Unable to program ucast filters\n");
 
+       /* Set VF bandwidth if specified */
+       if (vf->tx_rate) {
+               ret = i40e_aq_config_vsi_bw_limit(&pf->hw, vsi->seid,
+                                                 vf->tx_rate / 50, 0, NULL);
+               if (ret)
+                       dev_err(&pf->pdev->dev, "Unable to set tx rate, VF %d, error code %d.\n",
+                               vf->vf_id, ret);
+       }
+
 error_alloc_vsi_res:
        return ret;
 }
@@ -2184,7 +2193,61 @@ error_pvid:
  **/
 int i40e_ndo_set_vf_bw(struct net_device *netdev, int vf_id, int tx_rate)
 {
-       return -EOPNOTSUPP;
+       struct i40e_netdev_priv *np = netdev_priv(netdev);
+       struct i40e_pf *pf = np->vsi->back;
+       struct i40e_vsi *vsi;
+       struct i40e_vf *vf;
+       int speed = 0;
+       int ret = 0;
+
+       /* validate the request */
+       if (vf_id >= pf->num_alloc_vfs) {
+               dev_err(&pf->pdev->dev, "Invalid VF Identifier %d.\n", vf_id);
+               ret = -EINVAL;
+               goto error;
+       }
+
+       vf = &(pf->vf[vf_id]);
+       vsi = pf->vsi[vf->lan_vsi_index];
+       if (!test_bit(I40E_VF_STAT_INIT, &vf->vf_states)) {
+               dev_err(&pf->pdev->dev, "Uninitialized VF %d.\n", vf_id);
+               ret = -EINVAL;
+               goto error;
+       }
+
+       switch (pf->hw.phy.link_info.link_speed) {
+       case I40E_LINK_SPEED_40GB:
+               speed = 40000;
+               break;
+       case I40E_LINK_SPEED_10GB:
+               speed = 10000;
+               break;
+       case I40E_LINK_SPEED_1GB:
+               speed = 1000;
+               break;
+       default:
+               break;
+       }
+
+       if (tx_rate > speed) {
+               dev_err(&pf->pdev->dev, "Invalid tx rate %d specified for vf %d.",
+                       tx_rate, vf->vf_id);
+               ret = -EINVAL;
+               goto error;
+       }
+
+       /* Tx rate credits are in values of 50Mbps, 0 is disabled*/
+       ret = i40e_aq_config_vsi_bw_limit(&pf->hw, vsi->seid, tx_rate / 50, 0,
+                                         NULL);
+       if (ret) {
+               dev_err(&pf->pdev->dev, "Unable to set tx rate, error code %d.\n",
+                       ret);
+               ret = -EIO;
+               goto error;
+       }
+       vf->tx_rate = tx_rate;
+error:
+       return ret;
 }
 
 /**
@@ -2224,7 +2287,7 @@ int i40e_ndo_get_vf_config(struct net_device *netdev,
 
        memcpy(&ivi->mac, vf->default_lan_addr.addr, ETH_ALEN);
 
-       ivi->tx_rate = 0;
+       ivi->tx_rate = vf->tx_rate;
        ivi->vlan = le16_to_cpu(vsi->info.pvid) & I40E_VLAN_MASK;
        ivi->qos = (le16_to_cpu(vsi->info.pvid) & I40E_PRIORITY_MASK) >>
                   I40E_VLAN_PRIORITY_SHIFT;

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index 389c47f..ba3d1f8 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -98,6 +98,7 @@ struct i40e_vf {
 
        unsigned long vf_caps;  /* vf's adv. capabilities */
        unsigned long vf_states;        /* vf's runtime states */
+       unsigned int tx_rate;   /* Tx bandwidth limit in Mbps */
        bool link_forced;
        bool link_up;           /* only valid if vf link is forced */
 };