1 files changed, 163 insertions, 28 deletions

diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index 722cb054a5cd..ca395f9679d0 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -1,7 +1,7 @@
 /*
  * Linux driver for VMware's vmxnet3 ethernet NIC.
  *
- * Copyright (C) 2008-2016, VMware, Inc. All Rights Reserved.
+ * Copyright (C) 2008-2020, VMware, Inc. All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -842,21 +842,46 @@ vmxnet3_parse_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 	u8 protocol = 0;
 
 	if (ctx->mss) {	/* TSO */
-		ctx->eth_ip_hdr_size = skb_transport_offset(skb);
-		ctx->l4_hdr_size = tcp_hdrlen(skb);
-		ctx->copy_size = ctx->eth_ip_hdr_size + ctx->l4_hdr_size;
+		if (VMXNET3_VERSION_GE_4(adapter) && skb->encapsulation) {
+			ctx->l4_offset = skb_inner_transport_offset(skb);
+			ctx->l4_hdr_size = inner_tcp_hdrlen(skb);
+			ctx->copy_size = ctx->l4_offset + ctx->l4_hdr_size;
+		} else {
+			ctx->l4_offset = skb_transport_offset(skb);
+			ctx->l4_hdr_size = tcp_hdrlen(skb);
+			ctx->copy_size = ctx->l4_offset + ctx->l4_hdr_size;
+		}
 	} else {
 		if (skb->ip_summed == CHECKSUM_PARTIAL) {
-			ctx->eth_ip_hdr_size = skb_checksum_start_offset(skb);
+			/* For encap packets, skb_checksum_start_offset refers
+			 * to inner L4 offset. Thus, below works for encap as
+			 * well as non-encap case
+			 */
+			ctx->l4_offset = skb_checksum_start_offset(skb);
+
+			if (VMXNET3_VERSION_GE_4(adapter) &&
+			    skb->encapsulation) {
+				struct iphdr *iph = inner_ip_hdr(skb);
 
-			if (ctx->ipv4) {
-				const struct iphdr *iph = ip_hdr(skb);
+				if (iph->version == 4) {
+					protocol = iph->protocol;
+				} else {
+					const struct ipv6hdr *ipv6h;
+
+					ipv6h = inner_ipv6_hdr(skb);
+					protocol = ipv6h->nexthdr;
+				}
+			} else {
+				if (ctx->ipv4) {
+					const struct iphdr *iph = ip_hdr(skb);
 
-				protocol = iph->protocol;
-			} else if (ctx->ipv6) {
-				const struct ipv6hdr *ipv6h = ipv6_hdr(skb);
+					protocol = iph->protocol;
+				} else if (ctx->ipv6) {
+					const struct ipv6hdr *ipv6h;
 
-				protocol = ipv6h->nexthdr;
+					ipv6h = ipv6_hdr(skb);
+					protocol = ipv6h->nexthdr;
+				}
 			}
 
 			switch (protocol) {
@@ -871,10 +896,10 @@ vmxnet3_parse_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 				break;
 			}
 
-			ctx->copy_size = min(ctx->eth_ip_hdr_size +
+			ctx->copy_size = min(ctx->l4_offset +
 					 ctx->l4_hdr_size, skb->len);
 		} else {
-			ctx->eth_ip_hdr_size = 0;
+			ctx->l4_offset = 0;
 			ctx->l4_hdr_size = 0;
 			/* copy as much as allowed */
 			ctx->copy_size = min_t(unsigned int,
@@ -930,6 +955,25 @@ vmxnet3_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 
 
 static void
+vmxnet3_prepare_inner_tso(struct sk_buff *skb,
+			  struct vmxnet3_tx_ctx *ctx)
+{
+	struct tcphdr *tcph = inner_tcp_hdr(skb);
+	struct iphdr *iph = inner_ip_hdr(skb);
+
+	if (iph->version == 4) {
+		iph->check = 0;
+		tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
+						 IPPROTO_TCP, 0);
+	} else {
+		struct ipv6hdr *iph = inner_ipv6_hdr(skb);
+
+		tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
+					       IPPROTO_TCP, 0);
+	}
+}
+
+static void
 vmxnet3_prepare_tso(struct sk_buff *skb,
 		    struct vmxnet3_tx_ctx *ctx)
 {
@@ -987,6 +1031,7 @@ vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 	/* Use temporary descriptor to avoid touching bits multiple times */
 	union Vmxnet3_GenericDesc tempTxDesc;
 #endif
+	struct udphdr *udph;
 
 	count = txd_estimate(skb);
 
@@ -1003,7 +1048,11 @@ vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 			}
 			tq->stats.copy_skb_header++;
 		}
-		vmxnet3_prepare_tso(skb, &ctx);
+		if (skb->encapsulation) {
+			vmxnet3_prepare_inner_tso(skb, &ctx);
+		} else {
+			vmxnet3_prepare_tso(skb, &ctx);
+		}
 	} else {
 		if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
 
@@ -1026,14 +1075,14 @@ vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 		BUG_ON(ret <= 0 && ctx.copy_size != 0);
 		/* hdrs parsed, check against other limits */
 		if (ctx.mss) {
-			if (unlikely(ctx.eth_ip_hdr_size + ctx.l4_hdr_size >
+			if (unlikely(ctx.l4_offset + ctx.l4_hdr_size >
 				     VMXNET3_MAX_TX_BUF_SIZE)) {
 				tq->stats.drop_oversized_hdr++;
 				goto drop_pkt;
 			}
 		} else {
 			if (skb->ip_summed == CHECKSUM_PARTIAL) {
-				if (unlikely(ctx.eth_ip_hdr_size +
+				if (unlikely(ctx.l4_offset +
 					     skb->csum_offset >
 					     VMXNET3_MAX_CSUM_OFFSET)) {
 					tq->stats.drop_oversized_hdr++;
@@ -1080,16 +1129,34 @@ vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 #endif
 	tx_num_deferred = le32_to_cpu(tq->shared->txNumDeferred);
 	if (ctx.mss) {
-		gdesc->txd.hlen = ctx.eth_ip_hdr_size + ctx.l4_hdr_size;
-		gdesc->txd.om = VMXNET3_OM_TSO;
-		gdesc->txd.msscof = ctx.mss;
+		if (VMXNET3_VERSION_GE_4(adapter) && skb->encapsulation) {
+			gdesc->txd.hlen = ctx.l4_offset + ctx.l4_hdr_size;
+			gdesc->txd.om = VMXNET3_OM_ENCAP;
+			gdesc->txd.msscof = ctx.mss;
+
+			udph = udp_hdr(skb);
+			if (udph->check)
+				gdesc->txd.oco = 1;
+		} else {
+			gdesc->txd.hlen = ctx.l4_offset + ctx.l4_hdr_size;
+			gdesc->txd.om = VMXNET3_OM_TSO;
+			gdesc->txd.msscof = ctx.mss;
+		}
 		num_pkts = (skb->len - gdesc->txd.hlen + ctx.mss - 1) / ctx.mss;
 	} else {
 		if (skb->ip_summed == CHECKSUM_PARTIAL) {
-			gdesc->txd.hlen = ctx.eth_ip_hdr_size;
-			gdesc->txd.om = VMXNET3_OM_CSUM;
-			gdesc->txd.msscof = ctx.eth_ip_hdr_size +
-					    skb->csum_offset;
+			if (VMXNET3_VERSION_GE_4(adapter) &&
+			    skb->encapsulation) {
+				gdesc->txd.hlen = ctx.l4_offset +
+						  ctx.l4_hdr_size;
+				gdesc->txd.om = VMXNET3_OM_ENCAP;
+				gdesc->txd.msscof = 0;		/* Reserved */
+			} else {
+				gdesc->txd.hlen = ctx.l4_offset;
+				gdesc->txd.om = VMXNET3_OM_CSUM;
+				gdesc->txd.msscof = ctx.l4_offset +
+						    skb->csum_offset;
+			}
 		} else {
 			gdesc->txd.om = 0;
 			gdesc->txd.msscof = 0;
@@ -1168,13 +1235,21 @@ vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
 		    (le32_to_cpu(gdesc->dword[3]) &
 		     VMXNET3_RCD_CSUM_OK) == VMXNET3_RCD_CSUM_OK) {
 			skb->ip_summed = CHECKSUM_UNNECESSARY;
-			BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
-			BUG_ON(gdesc->rcd.frg);
+			WARN_ON_ONCE(!(gdesc->rcd.tcp || gdesc->rcd.udp) &&
+				     !(le32_to_cpu(gdesc->dword[0]) &
+				     (1UL << VMXNET3_RCD_HDR_INNER_SHIFT)));
+			WARN_ON_ONCE(gdesc->rcd.frg &&
+				     !(le32_to_cpu(gdesc->dword[0]) &
+				     (1UL << VMXNET3_RCD_HDR_INNER_SHIFT)));
 		} else if (gdesc->rcd.v6 && (le32_to_cpu(gdesc->dword[3]) &
 					     (1 << VMXNET3_RCD_TUC_SHIFT))) {
 			skb->ip_summed = CHECKSUM_UNNECESSARY;
-			BUG_ON(!(gdesc->rcd.tcp || gdesc->rcd.udp));
-			BUG_ON(gdesc->rcd.frg);
+			WARN_ON_ONCE(!(gdesc->rcd.tcp || gdesc->rcd.udp) &&
+				     !(le32_to_cpu(gdesc->dword[0]) &
+				     (1UL << VMXNET3_RCD_HDR_INNER_SHIFT)));
+			WARN_ON_ONCE(gdesc->rcd.frg &&
+				     !(le32_to_cpu(gdesc->dword[0]) &
+				     (1UL << VMXNET3_RCD_HDR_INNER_SHIFT)));
 		} else {
 			if (gdesc->rcd.csum) {
 				skb->csum = htons(gdesc->rcd.csum);
@@ -2429,6 +2504,10 @@ vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
 	if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
 		devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
 
+	if (adapter->netdev->features & (NETIF_F_GSO_UDP_TUNNEL |
+					 NETIF_F_GSO_UDP_TUNNEL_CSUM))
+		devRead->misc.uptFeatures |= UPT1_F_RXINNEROFLD;
+
 	devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
 	devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
 	devRead->misc.queueDescLen = cpu_to_le32(
@@ -2554,6 +2633,39 @@ vmxnet3_init_coalesce(struct vmxnet3_adapter *adapter)
 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
 }
 
+static void
+vmxnet3_init_rssfields(struct vmxnet3_adapter *adapter)
+{
+	struct Vmxnet3_DriverShared *shared = adapter->shared;
+	union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo;
+	unsigned long flags;
+
+	if (!VMXNET3_VERSION_GE_4(adapter))
+		return;
+
+	spin_lock_irqsave(&adapter->cmd_lock, flags);
+
+	if (adapter->default_rss_fields) {
+		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
+				       VMXNET3_CMD_GET_RSS_FIELDS);
+		adapter->rss_fields =
+			VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
+	} else {
+		cmdInfo->setRssFields = adapter->rss_fields;
+		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
+				       VMXNET3_CMD_SET_RSS_FIELDS);
+		/* Not all requested RSS may get applied, so get and
+		 * cache what was actually applied.
+		 */
+		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
+				       VMXNET3_CMD_GET_RSS_FIELDS);
+		adapter->rss_fields =
+			VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
+	}
+
+	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
+}
+
 int
 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
 {
@@ -2603,6 +2715,7 @@ vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
 	}
 
 	vmxnet3_init_coalesce(adapter);
+	vmxnet3_init_rssfields(adapter);
 
 	for (i = 0; i < adapter->num_rx_queues; i++) {
 		VMXNET3_WRITE_BAR0_REG(adapter,
@@ -3039,6 +3152,18 @@ vmxnet3_declare_features(struct vmxnet3_adapter *adapter, bool dma64)
 		NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX |
 		NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 |
 		NETIF_F_LRO;
+
+	if (VMXNET3_VERSION_GE_4(adapter)) {
+		netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
+				NETIF_F_GSO_UDP_TUNNEL_CSUM;
+
+		netdev->hw_enc_features = NETIF_F_SG | NETIF_F_RXCSUM |
+			NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX |
+			NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 |
+			NETIF_F_LRO | NETIF_F_GSO_UDP_TUNNEL |
+			NETIF_F_GSO_UDP_TUNNEL_CSUM;
+	}
+
 	if (dma64)
 		netdev->hw_features |= NETIF_F_HIGHDMA;
 	netdev->vlan_features = netdev->hw_features &
@@ -3382,7 +3507,12 @@ vmxnet3_probe_device(struct pci_dev *pdev,
 		goto err_alloc_pci;
 
 	ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
-	if (ver & (1 << VMXNET3_REV_3)) {
+	if (ver & (1 << VMXNET3_REV_4)) {
+		VMXNET3_WRITE_BAR1_REG(adapter,
+				       VMXNET3_REG_VRRS,
+				       1 << VMXNET3_REV_4);
+		adapter->version = VMXNET3_REV_4 + 1;
+	} else if (ver & (1 << VMXNET3_REV_3)) {
 		VMXNET3_WRITE_BAR1_REG(adapter,
 				       VMXNET3_REG_VRRS,
 				       1 << VMXNET3_REV_3);
@@ -3430,6 +3560,11 @@ vmxnet3_probe_device(struct pci_dev *pdev,
 		adapter->default_coal_mode = true;
 	}
 
+	if (VMXNET3_VERSION_GE_4(adapter)) {
+		adapter->default_rss_fields = true;
+		adapter->rss_fields = VMXNET3_RSS_FIELDS_DEFAULT;
+	}
+
 	SET_NETDEV_DEV(netdev, &pdev->dev);
 	vmxnet3_declare_features(adapter, dma64);