1 files changed, 195 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl.c b/drivers/net/ethernet/intel/ice/ice_virtchnl.c
index 2b4c791b6cba..dab3cd5d300e 100644
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl.c
@@ -462,6 +462,9 @@ static int ice_vc_get_vf_res_msg(struct ice_vf *vf, u8 *msg)
 			vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_RSS_REG;
 	}
 
+	if (vf->driver_caps & VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC)
+		vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC;
+
 	if (vf->driver_caps & VIRTCHNL_VF_OFFLOAD_FDIR_PF)
 		vfres->vf_cap_flags |= VIRTCHNL_VF_OFFLOAD_FDIR_PF;
 
@@ -1658,6 +1661,7 @@ static int ice_vc_cfg_qs_msg(struct ice_vf *vf, u8 *msg)
 		/* copy Rx queue info from VF into VSI */
 		if (qpi->rxq.ring_len > 0) {
 			u16 max_frame_size = ice_vc_get_max_frame_size(vf);
+			u32 rxdid;
 
 			vsi->rx_rings[i]->dma = qpi->rxq.dma_ring_addr;
 			vsi->rx_rings[i]->count = qpi->rxq.ring_len;
@@ -1685,6 +1689,24 @@ static int ice_vc_cfg_qs_msg(struct ice_vf *vf, u8 *msg)
 					 vf->vf_id, i);
 				goto error_param;
 			}
+
+			/* If Rx flex desc is supported, select RXDID for Rx
+			 * queues. Otherwise, use legacy 32byte descriptor
+			 * format. Legacy 16byte descriptor is not supported.
+			 * If this RXDID is selected, return error.
+			 */
+			if (vf->driver_caps &
+			    VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC) {
+				rxdid = qpi->rxq.rxdid;
+				if (!(BIT(rxdid) & pf->supported_rxdids))
+					goto error_param;
+			} else {
+				rxdid = ICE_RXDID_LEGACY_1;
+			}
+
+			ice_write_qrxflxp_cntxt(&vsi->back->hw,
+						vsi->rxq_map[q_idx],
+						rxdid, 0x03, false);
 		}
 	}
 
@@ -2457,6 +2479,164 @@ error_param:
 }
 
 /**
+ * ice_vc_get_rss_hena - return the RSS HENA bits allowed by the hardware
+ * @vf: pointer to the VF info
+ */
+static int ice_vc_get_rss_hena(struct ice_vf *vf)
+{
+	enum virtchnl_status_code v_ret = VIRTCHNL_STATUS_SUCCESS;
+	struct virtchnl_rss_hena *vrh = NULL;
+	int len = 0, ret;
+
+	if (!test_bit(ICE_VF_STATE_ACTIVE, vf->vf_states)) {
+		v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+		goto err;
+	}
+
+	if (!test_bit(ICE_FLAG_RSS_ENA, vf->pf->flags)) {
+		dev_err(ice_pf_to_dev(vf->pf), "RSS not supported by PF\n");
+		v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+		goto err;
+	}
+
+	len = sizeof(struct virtchnl_rss_hena);
+	vrh = kzalloc(len, GFP_KERNEL);
+	if (!vrh) {
+		v_ret = VIRTCHNL_STATUS_ERR_NO_MEMORY;
+		len = 0;
+		goto err;
+	}
+
+	vrh->hena = ICE_DEFAULT_RSS_HENA;
+err:
+	/* send the response back to the VF */
+	ret = ice_vc_send_msg_to_vf(vf, VIRTCHNL_OP_GET_RSS_HENA_CAPS, v_ret,
+				    (u8 *)vrh, len);
+	kfree(vrh);
+	return ret;
+}
+
+/**
+ * ice_vc_set_rss_hena - set RSS HENA bits for the VF
+ * @vf: pointer to the VF info
+ * @msg: pointer to the msg buffer
+ */
+static int ice_vc_set_rss_hena(struct ice_vf *vf, u8 *msg)
+{
+	struct virtchnl_rss_hena *vrh = (struct virtchnl_rss_hena *)msg;
+	enum virtchnl_status_code v_ret = VIRTCHNL_STATUS_SUCCESS;
+	struct ice_pf *pf = vf->pf;
+	struct ice_vsi *vsi;
+	struct device *dev;
+	int status;
+
+	dev = ice_pf_to_dev(pf);
+
+	if (!test_bit(ICE_VF_STATE_ACTIVE, vf->vf_states)) {
+		v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+		goto err;
+	}
+
+	if (!test_bit(ICE_FLAG_RSS_ENA, pf->flags)) {
+		dev_err(dev, "RSS not supported by PF\n");
+		v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+		goto err;
+	}
+
+	vsi = ice_get_vf_vsi(vf);
+	if (!vsi) {
+		v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+		goto err;
+	}
+
+	/* clear all previously programmed RSS configuration to allow VF drivers
+	 * the ability to customize the RSS configuration and/or completely
+	 * disable RSS
+	 */
+	status = ice_rem_vsi_rss_cfg(&pf->hw, vsi->idx);
+	if (status && !vrh->hena) {
+		/* only report failure to clear the current RSS configuration if
+		 * that was clearly the VF's intention (i.e. vrh->hena = 0)
+		 */
+		v_ret = ice_err_to_virt_err(status);
+		goto err;
+	} else if (status) {
+		/* allow the VF to update the RSS configuration even on failure
+		 * to clear the current RSS confguration in an attempt to keep
+		 * RSS in a working state
+		 */
+		dev_warn(dev, "Failed to clear the RSS configuration for VF %u\n",
+			 vf->vf_id);
+	}
+
+	if (vrh->hena) {
+		status = ice_add_avf_rss_cfg(&pf->hw, vsi->idx, vrh->hena);
+		v_ret = ice_err_to_virt_err(status);
+	}
+
+	/* send the response to the VF */
+err:
+	return ice_vc_send_msg_to_vf(vf, VIRTCHNL_OP_SET_RSS_HENA, v_ret,
+				     NULL, 0);
+}
+
+/**
+ * ice_vc_query_rxdid - query RXDID supported by DDP package
+ * @vf: pointer to VF info
+ *
+ * Called from VF to query a bitmap of supported flexible
+ * descriptor RXDIDs of a DDP package.
+ */
+static int ice_vc_query_rxdid(struct ice_vf *vf)
+{
+	enum virtchnl_status_code v_ret = VIRTCHNL_STATUS_SUCCESS;
+	struct virtchnl_supported_rxdids *rxdid = NULL;
+	struct ice_hw *hw = &vf->pf->hw;
+	struct ice_pf *pf = vf->pf;
+	int len = 0;
+	int ret, i;
+	u32 regval;
+
+	if (!test_bit(ICE_VF_STATE_ACTIVE, vf->vf_states)) {
+		v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+		goto err;
+	}
+
+	if (!(vf->driver_caps & VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC)) {
+		v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+		goto err;
+	}
+
+	len = sizeof(struct virtchnl_supported_rxdids);
+	rxdid = kzalloc(len, GFP_KERNEL);
+	if (!rxdid) {
+		v_ret = VIRTCHNL_STATUS_ERR_NO_MEMORY;
+		len = 0;
+		goto err;
+	}
+
+	/* Read flexiflag registers to determine whether the
+	 * corresponding RXDID is configured and supported or not.
+	 * Since Legacy 16byte descriptor format is not supported,
+	 * start from Legacy 32byte descriptor.
+	 */
+	for (i = ICE_RXDID_LEGACY_1; i < ICE_FLEX_DESC_RXDID_MAX_NUM; i++) {
+		regval = rd32(hw, GLFLXP_RXDID_FLAGS(i, 0));
+		if ((regval >> GLFLXP_RXDID_FLAGS_FLEXIFLAG_4N_S)
+			& GLFLXP_RXDID_FLAGS_FLEXIFLAG_4N_M)
+			rxdid->supported_rxdids |= BIT(i);
+	}
+
+	pf->supported_rxdids = rxdid->supported_rxdids;
+
+err:
+	ret = ice_vc_send_msg_to_vf(vf, VIRTCHNL_OP_GET_SUPPORTED_RXDIDS,
+				    v_ret, (u8 *)rxdid, len);
+	kfree(rxdid);
+	return ret;
+}
+
+/**
  * ice_vf_init_vlan_stripping - enable/disable VLAN stripping on initialization
  * @vf: VF to enable/disable VLAN stripping for on initialization
  *
@@ -3490,6 +3670,9 @@ static const struct ice_virtchnl_ops ice_virtchnl_dflt_ops = {
 	.cfg_promiscuous_mode_msg = ice_vc_cfg_promiscuous_mode_msg,
 	.add_vlan_msg = ice_vc_add_vlan_msg,
 	.remove_vlan_msg = ice_vc_remove_vlan_msg,
+	.query_rxdid = ice_vc_query_rxdid,
+	.get_rss_hena = ice_vc_get_rss_hena,
+	.set_rss_hena_msg = ice_vc_set_rss_hena,
 	.ena_vlan_stripping = ice_vc_ena_vlan_stripping,
 	.dis_vlan_stripping = ice_vc_dis_vlan_stripping,
 	.handle_rss_cfg_msg = ice_vc_handle_rss_cfg,
@@ -3624,6 +3807,9 @@ static const struct ice_virtchnl_ops ice_virtchnl_repr_ops = {
 	.cfg_promiscuous_mode_msg = ice_vc_repr_cfg_promiscuous_mode,
 	.add_vlan_msg = ice_vc_add_vlan_msg,
 	.remove_vlan_msg = ice_vc_remove_vlan_msg,
+	.query_rxdid = ice_vc_query_rxdid,
+	.get_rss_hena = ice_vc_get_rss_hena,
+	.set_rss_hena_msg = ice_vc_set_rss_hena,
 	.ena_vlan_stripping = ice_vc_ena_vlan_stripping,
 	.dis_vlan_stripping = ice_vc_dis_vlan_stripping,
 	.handle_rss_cfg_msg = ice_vc_handle_rss_cfg,
@@ -3764,6 +3950,15 @@ error_handler:
 	case VIRTCHNL_OP_DEL_VLAN:
 		err = ops->remove_vlan_msg(vf, msg);
 		break;
+	case VIRTCHNL_OP_GET_SUPPORTED_RXDIDS:
+		err = ops->query_rxdid(vf);
+		break;
+	case VIRTCHNL_OP_GET_RSS_HENA_CAPS:
+		err = ops->get_rss_hena(vf);
+		break;
+	case VIRTCHNL_OP_SET_RSS_HENA:
+		err = ops->set_rss_hena_msg(vf, msg);
+		break;
 	case VIRTCHNL_OP_ENABLE_VLAN_STRIPPING:
 		err = ops->ena_vlan_stripping(vf);
 		break;