Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue

Tony Nguyen says:

====================
100GbE Intel Wired LAN Driver Updates 2021-04-22

This series contains updates to virtchnl header file, ice, and iavf
drivers.

Vignesh adds support to warn about potentially malicious VFs; those that
are overflowing the mailbox for the ice driver.

Michal adds support for an allowlist/denylist of VF commands based on
supported capabilities for the ice driver.

Brett adds support for iavf UDP segmentation offload by adding the
capability bit to virtchnl, advertising support in the ice driver, and
enabling it in the iavf driver. He also adds a helper function for
getting the VF VSI for ice.

Colin Ian King removes an unneeded pointer assignment.

Qi enables support in the ice driver to support virtchnl requests from
the iavf to configure its own RSS input set. This includes adding new
capability bits, structures, and commands to virtchnl header file.

Haiyue enables configuring RSS flow hash via ethtool to support TCP, UDP
and SCTP protocols in iavf.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 250 insertions, 2 deletions

diff --git a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
index 3ebfef737f5c..3d904bc6ee76 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
+++ b/drivers/net/ethernet/intel/iavf/iavf_ethtool.c
@@ -1419,6 +1419,252 @@ static int iavf_del_fdir_ethtool(struct iavf_adapter *adapter, struct ethtool_rx
 }
 
 /**
+ * iavf_adv_rss_parse_hdrs - parses headers from RSS hash input
+ * @cmd: ethtool rxnfc command
+ *
+ * This function parses the rxnfc command and returns intended
+ * header types for RSS configuration
+ */
+static u32 iavf_adv_rss_parse_hdrs(struct ethtool_rxnfc *cmd)
+{
+	u32 hdrs = IAVF_ADV_RSS_FLOW_SEG_HDR_NONE;
+
+	switch (cmd->flow_type) {
+	case TCP_V4_FLOW:
+		hdrs |= IAVF_ADV_RSS_FLOW_SEG_HDR_TCP |
+			IAVF_ADV_RSS_FLOW_SEG_HDR_IPV4;
+		break;
+	case UDP_V4_FLOW:
+		hdrs |= IAVF_ADV_RSS_FLOW_SEG_HDR_UDP |
+			IAVF_ADV_RSS_FLOW_SEG_HDR_IPV4;
+		break;
+	case SCTP_V4_FLOW:
+		hdrs |= IAVF_ADV_RSS_FLOW_SEG_HDR_SCTP |
+			IAVF_ADV_RSS_FLOW_SEG_HDR_IPV4;
+		break;
+	case TCP_V6_FLOW:
+		hdrs |= IAVF_ADV_RSS_FLOW_SEG_HDR_TCP |
+			IAVF_ADV_RSS_FLOW_SEG_HDR_IPV6;
+		break;
+	case UDP_V6_FLOW:
+		hdrs |= IAVF_ADV_RSS_FLOW_SEG_HDR_UDP |
+			IAVF_ADV_RSS_FLOW_SEG_HDR_IPV6;
+		break;
+	case SCTP_V6_FLOW:
+		hdrs |= IAVF_ADV_RSS_FLOW_SEG_HDR_SCTP |
+			IAVF_ADV_RSS_FLOW_SEG_HDR_IPV6;
+		break;
+	default:
+		break;
+	}
+
+	return hdrs;
+}
+
+/**
+ * iavf_adv_rss_parse_hash_flds - parses hash fields from RSS hash input
+ * @cmd: ethtool rxnfc command
+ *
+ * This function parses the rxnfc command and returns intended hash fields for
+ * RSS configuration
+ */
+static u64 iavf_adv_rss_parse_hash_flds(struct ethtool_rxnfc *cmd)
+{
+	u64 hfld = IAVF_ADV_RSS_HASH_INVALID;
+
+	if (cmd->data & RXH_IP_SRC || cmd->data & RXH_IP_DST) {
+		switch (cmd->flow_type) {
+		case TCP_V4_FLOW:
+		case UDP_V4_FLOW:
+		case SCTP_V4_FLOW:
+			if (cmd->data & RXH_IP_SRC)
+				hfld |= IAVF_ADV_RSS_HASH_FLD_IPV4_SA;
+			if (cmd->data & RXH_IP_DST)
+				hfld |= IAVF_ADV_RSS_HASH_FLD_IPV4_DA;
+			break;
+		case TCP_V6_FLOW:
+		case UDP_V6_FLOW:
+		case SCTP_V6_FLOW:
+			if (cmd->data & RXH_IP_SRC)
+				hfld |= IAVF_ADV_RSS_HASH_FLD_IPV6_SA;
+			if (cmd->data & RXH_IP_DST)
+				hfld |= IAVF_ADV_RSS_HASH_FLD_IPV6_DA;
+			break;
+		default:
+			break;
+		}
+	}
+
+	if (cmd->data & RXH_L4_B_0_1 || cmd->data & RXH_L4_B_2_3) {
+		switch (cmd->flow_type) {
+		case TCP_V4_FLOW:
+		case TCP_V6_FLOW:
+			if (cmd->data & RXH_L4_B_0_1)
+				hfld |= IAVF_ADV_RSS_HASH_FLD_TCP_SRC_PORT;
+			if (cmd->data & RXH_L4_B_2_3)
+				hfld |= IAVF_ADV_RSS_HASH_FLD_TCP_DST_PORT;
+			break;
+		case UDP_V4_FLOW:
+		case UDP_V6_FLOW:
+			if (cmd->data & RXH_L4_B_0_1)
+				hfld |= IAVF_ADV_RSS_HASH_FLD_UDP_SRC_PORT;
+			if (cmd->data & RXH_L4_B_2_3)
+				hfld |= IAVF_ADV_RSS_HASH_FLD_UDP_DST_PORT;
+			break;
+		case SCTP_V4_FLOW:
+		case SCTP_V6_FLOW:
+			if (cmd->data & RXH_L4_B_0_1)
+				hfld |= IAVF_ADV_RSS_HASH_FLD_SCTP_SRC_PORT;
+			if (cmd->data & RXH_L4_B_2_3)
+				hfld |= IAVF_ADV_RSS_HASH_FLD_SCTP_DST_PORT;
+			break;
+		default:
+			break;
+		}
+	}
+
+	return hfld;
+}
+
+/**
+ * iavf_set_adv_rss_hash_opt - Enable/Disable flow types for RSS hash
+ * @adapter: pointer to the VF adapter structure
+ * @cmd: ethtool rxnfc command
+ *
+ * Returns Success if the flow input set is supported.
+ */
+static int
+iavf_set_adv_rss_hash_opt(struct iavf_adapter *adapter,
+			  struct ethtool_rxnfc *cmd)
+{
+	struct iavf_adv_rss *rss_old, *rss_new;
+	bool rss_new_add = false;
+	int count = 50, err = 0;
+	u64 hash_flds;
+	u32 hdrs;
+
+	if (!ADV_RSS_SUPPORT(adapter))
+		return -EOPNOTSUPP;
+
+	hdrs = iavf_adv_rss_parse_hdrs(cmd);
+	if (hdrs == IAVF_ADV_RSS_FLOW_SEG_HDR_NONE)
+		return -EINVAL;
+
+	hash_flds = iavf_adv_rss_parse_hash_flds(cmd);
+	if (hash_flds == IAVF_ADV_RSS_HASH_INVALID)
+		return -EINVAL;
+
+	rss_new = kzalloc(sizeof(*rss_new), GFP_KERNEL);
+	if (!rss_new)
+		return -ENOMEM;
+
+	if (iavf_fill_adv_rss_cfg_msg(&rss_new->cfg_msg, hdrs, hash_flds)) {
+		kfree(rss_new);
+		return -EINVAL;
+	}
+
+	while (test_and_set_bit(__IAVF_IN_CRITICAL_TASK,
+				&adapter->crit_section)) {
+		if (--count == 0) {
+			kfree(rss_new);
+			return -EINVAL;
+		}
+
+		udelay(1);
+	}
+
+	spin_lock_bh(&adapter->adv_rss_lock);
+	rss_old = iavf_find_adv_rss_cfg_by_hdrs(adapter, hdrs);
+	if (rss_old) {
+		if (rss_old->state != IAVF_ADV_RSS_ACTIVE) {
+			err = -EBUSY;
+		} else if (rss_old->hash_flds != hash_flds) {
+			rss_old->state = IAVF_ADV_RSS_ADD_REQUEST;
+			rss_old->hash_flds = hash_flds;
+			memcpy(&rss_old->cfg_msg, &rss_new->cfg_msg,
+			       sizeof(rss_new->cfg_msg));
+			adapter->aq_required |= IAVF_FLAG_AQ_ADD_ADV_RSS_CFG;
+		} else {
+			err = -EEXIST;
+		}
+	} else {
+		rss_new_add = true;
+		rss_new->state = IAVF_ADV_RSS_ADD_REQUEST;
+		rss_new->packet_hdrs = hdrs;
+		rss_new->hash_flds = hash_flds;
+		list_add_tail(&rss_new->list, &adapter->adv_rss_list_head);
+		adapter->aq_required |= IAVF_FLAG_AQ_ADD_ADV_RSS_CFG;
+	}
+	spin_unlock_bh(&adapter->adv_rss_lock);
+
+	if (!err)
+		mod_delayed_work(iavf_wq, &adapter->watchdog_task, 0);
+
+	clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
+
+	if (!rss_new_add)
+		kfree(rss_new);
+
+	return err;
+}
+
+/**
+ * iavf_get_adv_rss_hash_opt - Retrieve hash fields for a given flow-type
+ * @adapter: pointer to the VF adapter structure
+ * @cmd: ethtool rxnfc command
+ *
+ * Returns Success if the flow input set is supported.
+ */
+static int
+iavf_get_adv_rss_hash_opt(struct iavf_adapter *adapter,
+			  struct ethtool_rxnfc *cmd)
+{
+	struct iavf_adv_rss *rss;
+	u64 hash_flds;
+	u32 hdrs;
+
+	if (!ADV_RSS_SUPPORT(adapter))
+		return -EOPNOTSUPP;
+
+	cmd->data = 0;
+
+	hdrs = iavf_adv_rss_parse_hdrs(cmd);
+	if (hdrs == IAVF_ADV_RSS_FLOW_SEG_HDR_NONE)
+		return -EINVAL;
+
+	spin_lock_bh(&adapter->adv_rss_lock);
+	rss = iavf_find_adv_rss_cfg_by_hdrs(adapter, hdrs);
+	if (rss)
+		hash_flds = rss->hash_flds;
+	else
+		hash_flds = IAVF_ADV_RSS_HASH_INVALID;
+	spin_unlock_bh(&adapter->adv_rss_lock);
+
+	if (hash_flds == IAVF_ADV_RSS_HASH_INVALID)
+		return -EINVAL;
+
+	if (hash_flds & (IAVF_ADV_RSS_HASH_FLD_IPV4_SA |
+			 IAVF_ADV_RSS_HASH_FLD_IPV6_SA))
+		cmd->data |= (u64)RXH_IP_SRC;
+
+	if (hash_flds & (IAVF_ADV_RSS_HASH_FLD_IPV4_DA |
+			 IAVF_ADV_RSS_HASH_FLD_IPV6_DA))
+		cmd->data |= (u64)RXH_IP_DST;
+
+	if (hash_flds & (IAVF_ADV_RSS_HASH_FLD_TCP_SRC_PORT |
+			 IAVF_ADV_RSS_HASH_FLD_UDP_SRC_PORT |
+			 IAVF_ADV_RSS_HASH_FLD_SCTP_SRC_PORT))
+		cmd->data |= (u64)RXH_L4_B_0_1;
+
+	if (hash_flds & (IAVF_ADV_RSS_HASH_FLD_TCP_DST_PORT |
+			 IAVF_ADV_RSS_HASH_FLD_UDP_DST_PORT |
+			 IAVF_ADV_RSS_HASH_FLD_SCTP_DST_PORT))
+		cmd->data |= (u64)RXH_L4_B_2_3;
+
+	return 0;
+}
+
+/**
  * iavf_set_rxnfc - command to set Rx flow rules.
  * @netdev: network interface device structure
  * @cmd: ethtool rxnfc command
@@ -1437,6 +1683,9 @@ static int iavf_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd)
 	case ETHTOOL_SRXCLSRLDEL:
 		ret = iavf_del_fdir_ethtool(adapter, cmd);
 		break;
+	case ETHTOOL_SRXFH:
+		ret = iavf_set_adv_rss_hash_opt(adapter, cmd);
+		break;
 	default:
 		break;
 	}
@@ -1477,8 +1726,7 @@ static int iavf_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd,
 		ret = iavf_get_fdir_fltr_ids(adapter, cmd, (u32 *)rule_locs);
 		break;
 	case ETHTOOL_GRXFH:
-		netdev_info(netdev,
-			    "RSS hash info is not available to vf, use pf.\n");
+		ret = iavf_get_adv_rss_hash_opt(adapter, cmd);
 		break;
 	default:
 		break;