From: Scott Moser <smoser@redhat.com>
Date: Sun, 14 Oct 2007 13:04:42 -0400
Subject: [net] ibmveth: Checksum offload support
Message-id: Pine.LNX.4.64.0710141303250.3159@squad5-lp1.lab.boston.redhat.com
O-Subject: [PATCH RHEL5u2] bz254035 Checksum offload support for ibmveth
Bugzilla: 254035

Bug 254035 [1]
---------------

Description:
-----------
This patchset enables TCP checksum offload support for IPV4
on ibmveth. This completely eliminates the generation and checking of
the checksum for packets that are completely virtual and never
touch a physical network. A simple TCP_STREAM netperf run on
a virtual network with maximum mtu set yielded a significant increase in
throughput. This feature is enabled by default on systems that
support it, but can be disabled with a module option.

Kernel Version:
--------------
Patch built against 2.6.18-52

Upstream Status:
---------------
These changes were recently accepted into mainline for inclusion into 2.6.24 at
with the following git-commits:
  f4ff28720f45354573dcf4e0eb5a2dc5452cb3e1
  5fc7e01cb77132f96e171a37f9f792270b1603f6
  80e536770c2fcb8d2b7be9f5a36b85c36fd5943a
  ddbb4de9672097da2c0f19c6ebca0ebb5672e9b8
  3449a2ab31681420515e242920e755262b4f41e9
  79ef4a4dd44cd4f9942975b0f625bd01549a2aa9

Test Status:
----
To ensure cross platform build, a brew scratch build has been done against
2.6.18-52 at [2].

I've tested these changes in the kernel listed above using the script
attached to the bug (254035-nettest). No regressions were found and
netperf tests with checksum offload show a small performance increase with
mtu of 1500 (~ 5%) and significant performance increase with large mtu of
64000 (~40%).

Brian King of IBM has run the LTP test 'networktest.sh' to verify no
regressions.

Please review patch below for RHEL5u2
--
[1]:https://bugzilla.redhat.com/show_bug.cgi?id=254035
[2]:http://brewweb.devel.redhat.com/brew/taskinfo?taskID=1004258

Acked-by: Pete Zaitcev <zaitcev@redhat.com>

diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c
index a6e864e..25b59ae 100644
--- a/drivers/net/ibmveth.c
+++ b/drivers/net/ibmveth.c
@@ -28,7 +28,6 @@
 /**************************************************************************/
 /*
   TODO:
-  - remove frag processing code - no longer needed
   - add support for sysfs
   - possibly remove procfs support
 */
@@ -47,6 +46,8 @@
 #include <linux/mm.h>
 #include <linux/ethtool.h>
 #include <linux/proc_fs.h>
+#include <linux/in.h>
+#include <linux/ip.h>
 #include <asm/semaphore.h>
 #include <asm/hvcall.h>
 #include <asm/atomic.h>
@@ -111,20 +112,49 @@ MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(ibmveth_driver_version);
 
+struct ibmveth_stat {
+	char name[ETH_GSTRING_LEN];
+	int offset;
+};
+
+#define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
+#define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
+
+struct ibmveth_stat ibmveth_stats[] = {
+	{ "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
+	{ "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
+	{ "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) },
+	{ "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) },
+	{ "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
+	{ "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
+	{ "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
+	{ "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
+};
+
 /* simple methods of getting data from the current rxq entry */
+static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
+{
+	return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
+}
+
+static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
+{
+	return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT;
+}
+
 static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
 {
-	return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
+	return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle);
 }
 
 static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
 {
-	return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
+	return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID);
 }
 
 static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
 {
-	return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
+	return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK);
 }
 
 static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
@@ -132,6 +162,11 @@ static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
 	return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
 }
 
+static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
+{
+	return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD);
+}
+
 /* setup the initial settings for a buffer pool */
 static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
 {
@@ -229,9 +264,7 @@ static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struc
 		correlator = ((u64)pool->index << 32) | index;
 		*(u64*)skb->data = correlator;
 
-		desc.desc = 0;
-		desc.fields.valid = 1;
-		desc.fields.length = pool->buff_size;
+		desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
 		desc.fields.address = dma_addr;
 
 		lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
@@ -372,9 +405,8 @@ static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
 		return;
 	}
 
-	desc.desc = 0;
-	desc.fields.valid = 1;
-	desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
+	desc.fields.flags_len = IBMVETH_BUF_VALID |
+		adapter->rx_buff_pool[pool].buff_size;
 	desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
 
 	lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
@@ -525,9 +557,7 @@ static int ibmveth_open(struct net_device *netdev)
 	memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
 	mac_address = mac_address >> 16;
 
-	rxq_desc.desc = 0;
-	rxq_desc.fields.valid = 1;
-	rxq_desc.fields.length = adapter->rx_queue.queue_len;
+	rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len;
 	rxq_desc.fields.address = adapter->rx_queue.queue_dma;
 
 	ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
@@ -635,12 +665,163 @@ static u32 netdev_get_link(struct net_device *dev) {
 	return 1;
 }
 
+static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
+{
+	struct ibmveth_adapter *adapter = dev->priv;
+
+	if (data)
+		adapter->rx_csum = 1;
+	else {
+		/*
+		 * Since the ibmveth firmware interface does not have the concept of
+		 * separate tx/rx checksum offload enable, if rx checksum is disabled
+		 * we also have to disable tx checksum offload. Once we disable rx
+		 * checksum offload, we are no longer allowed to send tx buffers that
+		 * are not properly checksummed.
+		 */
+		adapter->rx_csum = 0;
+		dev->features &= ~NETIF_F_IP_CSUM;
+	}
+}
+
+static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
+{
+	struct ibmveth_adapter *adapter = dev->priv;
+
+	if (data) {
+		dev->features |= NETIF_F_IP_CSUM;
+		adapter->rx_csum = 1;
+	} else
+		dev->features &= ~NETIF_F_IP_CSUM;
+}
+
+static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
+				    void (*done) (struct net_device *, u32))
+{
+	struct ibmveth_adapter *adapter = dev->priv;
+	u64 set_attr, clr_attr, ret_attr;
+	long ret;
+	int rc1 = 0, rc2 = 0;
+	int restart = 0;
+
+	if (netif_running(dev)) {
+		restart = 1;
+		adapter->pool_config = 1;
+		ibmveth_close(dev);
+		adapter->pool_config = 0;
+	}
+
+	set_attr = 0;
+	clr_attr = 0;
+
+	if (data)
+		set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
+	else
+		clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
+
+	ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
+
+	if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
+	    !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
+	    (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
+		ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
+					 set_attr, &ret_attr);
+
+		if (ret != H_SUCCESS) {
+			rc1 = -EIO;
+			ibmveth_error_printk("unable to change checksum offload settings."
+					     " %d rc=%ld\n", data, ret);
+
+			ret = h_illan_attributes(adapter->vdev->unit_address,
+						 set_attr, clr_attr, &ret_attr);
+		} else
+			done(dev, data);
+	} else {
+		rc1 = -EIO;
+		ibmveth_error_printk("unable to change checksum offload settings."
+				     " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr);
+	}
+
+	if (restart)
+		rc2 = ibmveth_open(dev);
+
+	return rc1 ? rc1 : rc2;
+}
+
+static int ibmveth_set_rx_csum(struct net_device *dev, u32 data)
+{
+	struct ibmveth_adapter *adapter = dev->priv;
+
+	if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
+		return 0;
+
+	return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
+}
+
+static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
+{
+	struct ibmveth_adapter *adapter = dev->priv;
+	int rc = 0;
+
+	if (data && (dev->features & NETIF_F_IP_CSUM))
+		return 0;
+	if (!data && !(dev->features & NETIF_F_IP_CSUM))
+		return 0;
+
+	if (data && !adapter->rx_csum)
+		rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
+	else
+		ibmveth_set_tx_csum_flags(dev, data);
+
+	return rc;
+}
+
+static u32 ibmveth_get_rx_csum(struct net_device *dev)
+{
+	struct ibmveth_adapter *adapter = dev->priv;
+	return adapter->rx_csum;
+}
+
+static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
+{
+	int i;
+
+	if (stringset != ETH_SS_STATS)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
+		memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
+}
+
+static int ibmveth_get_stats_count(struct net_device *dev)
+{
+	return ARRAY_SIZE(ibmveth_stats);
+}
+
+static void ibmveth_get_ethtool_stats(struct net_device *dev,
+				      struct ethtool_stats *stats, u64 *data)
+{
+	int i;
+	struct ibmveth_adapter *adapter = dev->priv;
+
+	for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
+		data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
+}
+
 static struct ethtool_ops netdev_ethtool_ops = {
 	.get_drvinfo		= netdev_get_drvinfo,
 	.get_settings		= netdev_get_settings,
 	.get_link		= netdev_get_link,
 	.get_sg			= ethtool_op_get_sg,
 	.get_tx_csum		= ethtool_op_get_tx_csum,
+	.set_tx_csum		= ibmveth_set_tx_csum,
+	.get_rx_csum		= ibmveth_get_rx_csum,
+	.set_rx_csum		= ibmveth_set_rx_csum,
+	.get_tso			= ethtool_op_get_tso,
+	.get_ufo			= ethtool_op_get_ufo,
+	.get_strings		= ibmveth_get_strings,
+	.get_stats_count		= ibmveth_get_stats_count,
+	.get_ethtool_stats	= ibmveth_get_ethtool_stats,
 };
 
 static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
@@ -653,9 +834,8 @@ static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 {
 	struct ibmveth_adapter *adapter = netdev->priv;
-	union ibmveth_buf_desc desc[IbmVethMaxSendFrags];
+	union ibmveth_buf_desc desc;
 	unsigned long lpar_rc;
-	int nfrags = 0, curfrag;
 	unsigned long correlator;
 	unsigned long flags;
 	unsigned int retry_count;
@@ -665,82 +845,47 @@ static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 	unsigned int tx_send_failed = 0;
 	unsigned int tx_map_failed = 0;
 
+	desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len;
+	desc.fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
+					     skb->len, DMA_TO_DEVICE);
 
-	if ((skb_shinfo(skb)->nr_frags + 1) > IbmVethMaxSendFrags) {
+	if (skb->ip_summed == CHECKSUM_HW &&
+	    skb->nh.iph->protocol != IPPROTO_TCP && skb_checksum_help(skb, 0)) {
+		ibmveth_error_printk("tx: failed to checksum packet\n");
 		tx_dropped++;
 		goto out;
 	}
 
-	memset(&desc, 0, sizeof(desc));
-
-	/* nfrags = number of frags after the initial fragment */
-	nfrags = skb_shinfo(skb)->nr_frags;
+	if (skb->ip_summed == CHECKSUM_HW) {
+		unsigned char *buf = skb->h.raw + skb->csum;
 
-	if(nfrags)
-		adapter->tx_multidesc_send++;
+		desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
 
-	/* map the initial fragment */
-	desc[0].fields.length  = nfrags ? skb->len - skb->data_len : skb->len;
-	desc[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
-					desc[0].fields.length, DMA_TO_DEVICE);
-	desc[0].fields.valid   = 1;
+		/* Need to zero out the checksum */
+		buf[0] = 0;
+		buf[1] = 0;
+	}
 
-	if(dma_mapping_error(desc[0].fields.address)) {
-		ibmveth_error_printk("tx: unable to map initial fragment\n");
+	if (dma_mapping_error(desc.fields.address)) {
+		ibmveth_error_printk("tx: unable to map xmit buffer\n");
 		tx_map_failed++;
 		tx_dropped++;
 		goto out;
 	}
 
-	curfrag = nfrags;
-
-	/* map fragments past the initial portion if there are any */
-	while(curfrag--) {
-		skb_frag_t *frag = &skb_shinfo(skb)->frags[curfrag];
-		desc[curfrag+1].fields.address
-			= dma_map_single(&adapter->vdev->dev,
-				page_address(frag->page) + frag->page_offset,
-				frag->size, DMA_TO_DEVICE);
-		desc[curfrag+1].fields.length = frag->size;
-		desc[curfrag+1].fields.valid  = 1;
-
-		if(dma_mapping_error(desc[curfrag+1].fields.address)) {
-			ibmveth_error_printk("tx: unable to map fragment %d\n", curfrag);
-			tx_map_failed++;
-			tx_dropped++;
-			/* Free all the mappings we just created */
-			while(curfrag < nfrags) {
-				dma_unmap_single(&adapter->vdev->dev,
-						 desc[curfrag+1].fields.address,
-						 desc[curfrag+1].fields.length,
-						 DMA_TO_DEVICE);
-				curfrag++;
-			}
-			goto out;
-		}
-	}
-
 	/* send the frame. Arbitrarily set retrycount to 1024 */
 	correlator = 0;
 	retry_count = 1024;
 	do {
 		lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
-					     desc[0].desc,
-					     desc[1].desc,
-					     desc[2].desc,
-					     desc[3].desc,
-					     desc[4].desc,
-					     desc[5].desc,
-					     correlator);
+					     desc.desc, 0, 0, 0, 0, 0, correlator);
 	} while ((lpar_rc == H_BUSY) && (retry_count--));
 
 	if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
-		int i;
 		ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
-		for(i = 0; i < 6; i++) {
-			ibmveth_error_printk("tx: desc[%i] valid=%d, len=%d, address=0x%d\n", i,
-					     desc[i].fields.valid, desc[i].fields.length, desc[i].fields.address);
-		}
+		ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n",
+				     (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0,
+				     skb->len, desc.fields.address);
 		tx_send_failed++;
 		tx_dropped++;
 	} else {
@@ -749,11 +894,8 @@ static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 		netdev->trans_start = jiffies;
 	}
 
-	do {
-		dma_unmap_single(&adapter->vdev->dev,
-				desc[nfrags].fields.address,
-				desc[nfrags].fields.length, DMA_TO_DEVICE);
-	} while(--nfrags >= 0);
+	dma_unmap_single(&adapter->vdev->dev, desc.fields.address,
+			 skb->len, DMA_TO_DEVICE);
 
 out:	spin_lock_irqsave(&adapter->stats_lock, flags);
 	adapter->stats.tx_dropped += tx_dropped;
@@ -792,7 +934,11 @@ static int ibmveth_poll(struct net_device *netdev, int *budget)
 			} else {
 				int length = ibmveth_rxq_frame_length(adapter);
 				int offset = ibmveth_rxq_frame_offset(adapter);
+				int csum_good = ibmveth_rxq_csum_good(adapter);
+
 				skb = ibmveth_rxq_get_buffer(adapter);
+				if (csum_good)
+					skb->ip_summed = CHECKSUM_UNNECESSARY;
 
 				ibmveth_rxq_harvest_buffer(adapter);
 
@@ -963,8 +1109,10 @@ static void ibmveth_poll_controller(struct net_device *dev)
 static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
 {
 	int rc, i;
+	long ret;
 	struct net_device *netdev;
 	struct ibmveth_adapter *adapter = NULL;
+	u64 set_attr, ret_attr;
 
 	unsigned char *mac_addr_p;
 	unsigned int *mcastFilterSize_p;
@@ -1059,6 +1207,22 @@ static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_
 
 	ibmveth_debug_printk("registering netdev...\n");
 
+	ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr);
+
+	if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
+	    !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
+	    (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
+		set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
+
+		ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr);
+
+		if (ret == H_SUCCESS) {
+			adapter->rx_csum = 1;
+			netdev->features |= NETIF_F_IP_CSUM;
+		} else
+			ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr);
+	}
+
 	rc = register_netdev(netdev);
 
 	if(rc) {
@@ -1142,10 +1306,7 @@ static int ibmveth_seq_show(struct seq_file *seq, void *v)
 		   firmware_mac[3], firmware_mac[4], firmware_mac[5]);
 
 	seq_printf(seq, "\nAdapter Statistics:\n");
-	seq_printf(seq, "  TX:  skbuffs linearized:          %ld\n", adapter->tx_linearized);
-	seq_printf(seq, "       multi-descriptor sends:      %ld\n", adapter->tx_multidesc_send);
-	seq_printf(seq, "       skb_linearize failures:      %ld\n", adapter->tx_linearize_failed);
-	seq_printf(seq, "       vio_map_single failres:      %ld\n", adapter->tx_map_failed);
+	seq_printf(seq, "  TX:  vio_map_single failres:      %ld\n", adapter->tx_map_failed);
 	seq_printf(seq, "       send failures:               %ld\n", adapter->tx_send_failed);
 	seq_printf(seq, "  RX:  replenish task cycles:       %ld\n", adapter->replenish_task_cycles);
 	seq_printf(seq, "       alloc_skb_failures:          %ld\n", adapter->replenish_no_mem);
diff --git a/drivers/net/ibmveth.h b/drivers/net/ibmveth.h
index 413002f..62d1c44 100644
--- a/drivers/net/ibmveth.h
+++ b/drivers/net/ibmveth.h
@@ -25,8 +25,6 @@
 #ifndef _IBMVETH_H
 #define _IBMVETH_H
 
-#define IbmVethMaxSendFrags 6
-
 /* constants for H_MULTICAST_CTRL */
 #define IbmVethMcastReceptionModifyBit     0x80000UL
 #define IbmVethMcastReceptionEnableBit     0x20000UL
@@ -50,6 +48,13 @@
 #define H_MULTICAST_CTRL         0x130
 #define H_CHANGE_LOGICAL_LAN_MAC 0x14C
 #define H_FREE_LOGICAL_LAN_BUFFER 0x1D4
+#define H_ILLAN_ATTRIBUTES       0x244
+
+#define IBMVETH_ILLAN_PADDED_PKT_CSUM	0x0000000000002000ULL
+#define IBMVETH_ILLAN_TRUNK_PRI_MASK	0x0000000000000F00ULL
+#define IBMVETH_ILLAN_IPV6_TCP_CSUM		0x0000000000000004ULL
+#define IBMVETH_ILLAN_IPV4_TCP_CSUM		0x0000000000000002ULL
+#define IBMVETH_ILLAN_ACTIVE_TRUNK		0x0000000000000001ULL
 
 /* hcall macros */
 #define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
@@ -64,6 +69,21 @@
 #define h_send_logical_lan(ua, buf1, buf2, buf3, buf4, buf5, buf6, correlator) \
   plpar_hcall_8arg_2ret(H_SEND_LOGICAL_LAN, ua, buf1, buf2, buf3, buf4, buf5, buf6, correlator, &correlator)
 
+static inline long h_illan_attributes(unsigned long unit_address,
+				      unsigned long reset_mask, unsigned long set_mask,
+				      unsigned long *ret_attributes)
+{
+	long rc;
+	unsigned long retbuf[3];
+
+	rc = plpar_hcall(H_ILLAN_ATTRIBUTES, unit_address, reset_mask, set_mask,
+			 0, &retbuf[0], &retbuf[1], &retbuf[2]);
+
+	*ret_attributes = retbuf[0];
+
+	return rc;
+}
+
 #define h_multicast_ctrl(ua, cmd, mac) \
   plpar_hcall_norets(H_MULTICAST_CTRL, ua, cmd, mac)
 
@@ -120,6 +140,7 @@ struct ibmveth_adapter {
     struct ibmveth_buff_pool rx_buff_pool[IbmVethNumBufferPools];
     struct ibmveth_rx_q rx_queue;
     int pool_config;
+    int rx_csum;
 
     /* adapter specific stats */
     u64 replenish_task_cycles;
@@ -128,20 +149,19 @@ struct ibmveth_adapter {
     u64 replenish_add_buff_success;
     u64 rx_invalid_buffer;
     u64 rx_no_buffer;
-    u64 tx_multidesc_send;
-    u64 tx_linearized;
-    u64 tx_linearize_failed;
     u64 tx_map_failed;
     u64 tx_send_failed;
     spinlock_t stats_lock;
 };
 
 struct ibmveth_buf_desc_fields {
-    u32 valid : 1;
-    u32 toggle : 1;
-    u32 reserved : 6;
-    u32 length : 24;
-    u32 address;
+	u32 flags_len;
+#define IBMVETH_BUF_VALID	0x80000000
+#define IBMVETH_BUF_TOGGLE	0x40000000
+#define IBMVETH_BUF_NO_CSUM	0x02000000
+#define IBMVETH_BUF_CSUM_GOOD	0x01000000
+#define IBMVETH_BUF_LEN_MASK	0x00FFFFFF
+	u32 address;
 };
 
 union ibmveth_buf_desc {
@@ -150,12 +170,16 @@ union ibmveth_buf_desc {
 };
 
 struct ibmveth_rx_q_entry {
-    u16 toggle : 1;
-    u16 valid : 1;
-    u16 reserved : 14;
-    u16 offset;
-    u32 length;
-    u64 correlator;
+	u32 flags_off;
+#define IBMVETH_RXQ_TOGGLE		0x80000000
+#define IBMVETH_RXQ_TOGGLE_SHIFT	31
+#define IBMVETH_RXQ_VALID		0x40000000
+#define IBMVETH_RXQ_NO_CSUM		0x02000000
+#define IBMVETH_RXQ_CSUM_GOOD		0x01000000
+#define IBMVETH_RXQ_OFF_MASK		0x0000FFFF
+
+	u32 length;
+	u64 correlator;
 };
 
 #endif /* _IBMVETH_H */