i40evf: add ndo_setup_tc callback to i40evf

This patch introduces the callback to the ndo_setup_tc function
in the VF driver. We add a wrapper function to make room for the
upcoming cloud filter patches which add calls to different functions
from setup_tc.

First, we add support for capability exchange for ADQ between the
PF and VF. Next, we add support to take in the mqprio configuration
and configure queues as per the traffic classes, rate limit and the
priorities specified by the user. This is done by passing the channel
config to the PF driver through a virtchannel message.

The flags and bits added, track if ADq is enabled, set max number of
traffic classes to 4 and provide ability to negotiate capability with
the PF.

Signed-off-by: Harshitha Ramamurthy <harshitha.ramamurthy@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 81 insertions, 1 deletions

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c
index e8dcc31fcbf2..f6c56141b4fe 100644
--- a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c
@@ -161,7 +161,8 @@ int i40evf_send_vf_config_msg(struct i40evf_adapter *adapter)
 	       VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2 |
 	       VIRTCHNL_VF_OFFLOAD_ENCAP |
 	       VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM |
-	       VIRTCHNL_VF_OFFLOAD_REQ_QUEUES;
+	       VIRTCHNL_VF_OFFLOAD_REQ_QUEUES |
+	       VIRTCHNL_VF_OFFLOAD_ADQ;
 
 	adapter->current_op = VIRTCHNL_OP_GET_VF_RESOURCES;
 	adapter->aq_required &= ~I40EVF_FLAG_AQ_GET_CONFIG;
@@ -973,6 +974,70 @@ static void i40evf_print_link_message(struct i40evf_adapter *adapter)
 }
 
 /**
+ * i40evf_enable_channel
+ * @adapter: adapter structure
+ *
+ * Request that the PF enable channels as specified by
+ * the user via tc tool.
+ **/
+void i40evf_enable_channels(struct i40evf_adapter *adapter)
+{
+	struct virtchnl_tc_info *vti = NULL;
+	u16 len;
+	int i;
+
+	if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) {
+		/* bail because we already have a command pending */
+		dev_err(&adapter->pdev->dev, "Cannot configure mqprio, command %d pending\n",
+			adapter->current_op);
+		return;
+	}
+
+	len = (adapter->num_tc * sizeof(struct virtchnl_channel_info)) +
+	       sizeof(struct virtchnl_tc_info);
+
+	vti = kzalloc(len, GFP_KERNEL);
+	if (!vti)
+		return;
+	vti->num_tc = adapter->num_tc;
+	for (i = 0; i < vti->num_tc; i++) {
+		vti->list[i].count = adapter->ch_config.ch_info[i].count;
+		vti->list[i].offset = adapter->ch_config.ch_info[i].offset;
+	}
+
+	adapter->ch_config.state = __I40EVF_TC_RUNNING;
+	adapter->flags |= I40EVF_FLAG_REINIT_ITR_NEEDED;
+	adapter->current_op = VIRTCHNL_OP_ENABLE_CHANNELS;
+	adapter->aq_required &= ~I40EVF_FLAG_AQ_ENABLE_CHANNELS;
+	i40evf_send_pf_msg(adapter, VIRTCHNL_OP_ENABLE_CHANNELS,
+			   (u8 *)vti, len);
+	kfree(vti);
+}
+
+/**
+ * i40evf_disable_channel
+ * @adapter: adapter structure
+ *
+ * Request that the PF disable channels that are configured
+ **/
+void i40evf_disable_channels(struct i40evf_adapter *adapter)
+{
+	if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) {
+		/* bail because we already have a command pending */
+		dev_err(&adapter->pdev->dev, "Cannot configure mqprio, command %d pending\n",
+			adapter->current_op);
+		return;
+	}
+
+	adapter->ch_config.state = __I40EVF_TC_INVALID;
+	adapter->flags |= I40EVF_FLAG_REINIT_ITR_NEEDED;
+	adapter->current_op = VIRTCHNL_OP_DISABLE_CHANNELS;
+	adapter->aq_required &= ~I40EVF_FLAG_AQ_DISABLE_CHANNELS;
+	i40evf_send_pf_msg(adapter, VIRTCHNL_OP_DISABLE_CHANNELS,
+			   NULL, 0);
+}
+
+/**
  * i40evf_request_reset
  * @adapter: adapter structure
  *
@@ -1080,6 +1145,21 @@ void i40evf_virtchnl_completion(struct i40evf_adapter *adapter,
 			dev_err(&adapter->pdev->dev, "Failed to delete MAC filter, error %s\n",
 				i40evf_stat_str(&adapter->hw, v_retval));
 			break;
+		case VIRTCHNL_OP_ENABLE_CHANNELS:
+			dev_err(&adapter->pdev->dev, "Failed to configure queue channels, error %s\n",
+				i40evf_stat_str(&adapter->hw, v_retval));
+			adapter->flags &= ~I40EVF_FLAG_REINIT_ITR_NEEDED;
+			adapter->ch_config.state = __I40EVF_TC_INVALID;
+			netdev_reset_tc(netdev);
+			netif_tx_start_all_queues(netdev);
+			break;
+		case VIRTCHNL_OP_DISABLE_CHANNELS:
+			dev_err(&adapter->pdev->dev, "Failed to disable queue channels, error %s\n",
+				i40evf_stat_str(&adapter->hw, v_retval));
+			adapter->flags &= ~I40EVF_FLAG_REINIT_ITR_NEEDED;
+			adapter->ch_config.state = __I40EVF_TC_RUNNING;
+			netif_tx_start_all_queues(netdev);
+			break;
 		default:
 			dev_err(&adapter->pdev->dev, "PF returned error %d (%s) to our request %d\n",
 				v_retval,