EHEA updates

EHEA updates

[Thadeu Lima de Souza Cascardo]

This is a rebase of Anton's patches on top of net-next HEAD, commit
7ae60b3. Besides the conflicts with the latest patches, some trivia were
fixed as suggested.

Ben Hutchings' suggestions about doing packet split and NAPI fixes were
taken into consideration, but not done on this round.

The result was tested between two LPARs and also using a switch, with
ICMP and TCP tests.

[PATCH 01/15] ehea: Remove NETIF_F_LLTX

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

Remove the deprecated NETIF_F_LLTX feature. Since the network stack
now provides the locking we can remove the driver specific
pr->xmit_lock.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea.h      |    1 -
 drivers/net/ethernet/ibm/ehea/ehea_main.c |   12 ++----------
 2 files changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea.h b/drivers/net/ethernet/ibm/ehea/ehea.h
index 0b8e6a9..5b5c1b5 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea.h
+++ b/drivers/net/ethernet/ibm/ehea/ehea.h
@@ -363,7 +363,6 @@ struct ehea_port_res {
 	struct port_stats p_stats;
 	struct ehea_mr send_mr;       	/* send memory region */
 	struct ehea_mr recv_mr;       	/* receive memory region */
-	spinlock_t xmit_lock;
 	struct ehea_port *port;
 	char int_recv_name[EHEA_IRQ_NAME_SIZE];
 	char int_send_name[EHEA_IRQ_NAME_SIZE];
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index dfefe80..ce9a670 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -1534,7 +1534,6 @@ static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
 	pr->rx_packets = rx_packets;
 
 	pr->port = port;
-	spin_lock_init(&pr->xmit_lock);
 	spin_lock_init(&pr->netif_queue);
 
 	pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
@@ -2254,14 +2253,9 @@ static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
 
-	if (!spin_trylock(&pr->xmit_lock))
+	if (pr->queue_stopped)
 		return NETDEV_TX_BUSY;
 
-	if (pr->queue_stopped) {
-		spin_unlock(&pr->xmit_lock);
-		return NETDEV_TX_BUSY;
-	}
-
 	swqe = ehea_get_swqe(pr->qp, &swqe_index);
 	memset(swqe, 0, SWQE_HEADER_SIZE);
 	atomic_dec(&pr->swqe_avail);
@@ -2325,8 +2319,6 @@ static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		}
 		spin_unlock_irqrestore(&pr->netif_queue, flags);
 	}
-	dev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
-	spin_unlock(&pr->xmit_lock);
 
 	return NETDEV_TX_OK;
 }
@@ -3233,7 +3225,7 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
 	dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
 		      | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
 		      | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
-		      | NETIF_F_LLTX | NETIF_F_RXCSUM;
+		      | NETIF_F_RXCSUM;
 	dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
 
 	if (use_lro)
-- 
1.7.4.4

[PATCH 02/15] ehea: Update multiqueue support

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

The ehea driver had some multiqueue support but was missing the last
few years of networking stack improvements:

- Use skb_record_rx_queue to record which queue an skb came in on.

- Remove the driver specific netif_queue lock and use the networking
  stack transmit lock instead.

- Remove the driver specific transmit queue hashing and use
  skb_get_queue_mapping instead.

- Use netif_tx_{start|stop|wake}_queue where appropriate. We can also
  remove pr->queue_stopped and just check the queue status directly.

- Print all 16 queues in the ethtool stats.

We now enable multiqueue by default since it is a clear win on all my
testing so far.

v3:
[cascardo] fixed use_mcs parameter description
[cascardo] set ehea_ethtool_stats_keys as const

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea.h         |    2 -
 drivers/net/ethernet/ibm/ehea/ehea_ethtool.c |   17 +++--
 drivers/net/ethernet/ibm/ehea/ehea_main.c    |   92 +++++++++++---------------
 3 files changed, 49 insertions(+), 62 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea.h b/drivers/net/ethernet/ibm/ehea/ehea.h
index 5b5c1b5..e247927 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea.h
+++ b/drivers/net/ethernet/ibm/ehea/ehea.h
@@ -375,8 +375,6 @@ struct ehea_port_res {
 	struct ehea_q_skb_arr rq3_skba;
 	struct ehea_q_skb_arr sq_skba;
 	int sq_skba_size;
-	spinlock_t netif_queue;
-	int queue_stopped;
 	int swqe_refill_th;
 	atomic_t swqe_avail;
 	int swqe_ll_count;
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_ethtool.c b/drivers/net/ethernet/ibm/ehea/ehea_ethtool.c
index 7f642ae..d185016 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_ethtool.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_ethtool.c
@@ -180,7 +180,7 @@ static void ehea_set_msglevel(struct net_device *dev, u32 value)
 	port->msg_enable = value;
 }
 
-static char ehea_ethtool_stats_keys[][ETH_GSTRING_LEN] = {
+static const char ehea_ethtool_stats_keys[][ETH_GSTRING_LEN] = {
 	{"sig_comp_iv"},
 	{"swqe_refill_th"},
 	{"port resets"},
@@ -189,7 +189,6 @@ static char ehea_ethtool_stats_keys[][ETH_GSTRING_LEN] = {
 	{"IP cksum errors"},
 	{"Frame cksum errors"},
 	{"num SQ stopped"},
-	{"SQ stopped"},
 	{"PR0 free_swqes"},
 	{"PR1 free_swqes"},
 	{"PR2 free_swqes"},
@@ -198,6 +197,14 @@ static char ehea_ethtool_stats_keys[][ETH_GSTRING_LEN] = {
 	{"PR5 free_swqes"},
 	{"PR6 free_swqes"},
 	{"PR7 free_swqes"},
+	{"PR8 free_swqes"},
+	{"PR9 free_swqes"},
+	{"PR10 free_swqes"},
+	{"PR11 free_swqes"},
+	{"PR12 free_swqes"},
+	{"PR13 free_swqes"},
+	{"PR14 free_swqes"},
+	{"PR15 free_swqes"},
 	{"LRO aggregated"},
 	{"LRO flushed"},
 	{"LRO no_desc"},
@@ -255,11 +262,7 @@ static void ehea_get_ethtool_stats(struct net_device *dev,
 		tmp += port->port_res[k].p_stats.queue_stopped;
 	data[i++] = tmp;
 
-	for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
-		tmp |= port->port_res[k].queue_stopped;
-	data[i++] = tmp;
-
-	for (k = 0; k < 8; k++)
+	for (k = 0; k < 16; k++)
 		data[i++] = atomic_read(&port->port_res[k].swqe_avail);
 
 	for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index ce9a670..a6c4192 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -61,7 +61,7 @@ static int rq1_entries = EHEA_DEF_ENTRIES_RQ1;
 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
-static int use_mcs;
+static int use_mcs = 1;
 static int use_lro;
 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
 static int num_tx_qps = EHEA_NUM_TX_QP;
@@ -94,7 +94,8 @@ MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 "
 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
 		 "[2^x - 1], x = [6..14]. Default = "
 		 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")");
-MODULE_PARM_DESC(use_mcs, " 0:NAPI, 1:Multiple receive queues, Default = 0 ");
+MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
+		 "Default = 1");
 
 MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
 		 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
@@ -551,7 +552,8 @@ static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num)
 }
 
 static inline void ehea_fill_skb(struct net_device *dev,
-				 struct sk_buff *skb, struct ehea_cqe *cqe)
+				 struct sk_buff *skb, struct ehea_cqe *cqe,
+				 struct ehea_port_res *pr)
 {
 	int length = cqe->num_bytes_transfered - 4;	/*remove CRC */
 
@@ -565,6 +567,8 @@ static inline void ehea_fill_skb(struct net_device *dev,
 		skb->csum = csum_unfold(~cqe->inet_checksum_value);
 	} else
 		skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+	skb_record_rx_queue(skb, pr - &pr->port->port_res[0]);
 }
 
 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array,
@@ -750,7 +754,7 @@ static int ehea_proc_rwqes(struct net_device *dev,
 				}
 				skb_copy_to_linear_data(skb, ((char *)cqe) + 64,
 						 cqe->num_bytes_transfered - 4);
-				ehea_fill_skb(dev, skb, cqe);
+				ehea_fill_skb(dev, skb, cqe, pr);
 			} else if (rq == 2) {
 				/* RQ2 */
 				skb = get_skb_by_index(skb_arr_rq2,
@@ -760,7 +764,7 @@ static int ehea_proc_rwqes(struct net_device *dev,
 						  "rq2: skb=NULL\n");
 					break;
 				}
-				ehea_fill_skb(dev, skb, cqe);
+				ehea_fill_skb(dev, skb, cqe, pr);
 				processed_rq2++;
 			} else {
 				/* RQ3 */
@@ -771,7 +775,7 @@ static int ehea_proc_rwqes(struct net_device *dev,
 						  "rq3: skb=NULL\n");
 					break;
 				}
-				ehea_fill_skb(dev, skb, cqe);
+				ehea_fill_skb(dev, skb, cqe, pr);
 				processed_rq3++;
 			}
 
@@ -857,7 +861,8 @@ static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 	int cqe_counter = 0;
 	int swqe_av = 0;
 	int index;
-	unsigned long flags;
+	struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev,
+						pr - &pr->port->port_res[0]);
 
 	cqe = ehea_poll_cq(send_cq);
 	while (cqe && (quota > 0)) {
@@ -907,14 +912,15 @@ static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 	ehea_update_feca(send_cq, cqe_counter);
 	atomic_add(swqe_av, &pr->swqe_avail);
 
-	spin_lock_irqsave(&pr->netif_queue, flags);
-
-	if (pr->queue_stopped && (atomic_read(&pr->swqe_avail)
-				  >= pr->swqe_refill_th)) {
-		netif_wake_queue(pr->port->netdev);
-		pr->queue_stopped = 0;
+	if (unlikely(netif_tx_queue_stopped(txq) &&
+		     (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) {
+		__netif_tx_lock(txq, smp_processor_id());
+		if (netif_tx_queue_stopped(txq) &&
+		    (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))
+			netif_tx_wake_queue(txq);
+		__netif_tx_unlock(txq);
 	}
-	spin_unlock_irqrestore(&pr->netif_queue, flags);
+
 	wake_up(&pr->port->swqe_avail_wq);
 
 	return cqe;
@@ -1251,7 +1257,7 @@ static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
 				netif_info(port, link, dev,
 					   "Logical port down\n");
 				netif_carrier_off(dev);
-				netif_stop_queue(dev);
+				netif_tx_disable(dev);
 			}
 
 		if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) {
@@ -1282,7 +1288,7 @@ static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe)
 	case EHEA_EC_PORT_MALFUNC:
 		netdev_info(dev, "Port malfunction\n");
 		netif_carrier_off(dev);
-		netif_stop_queue(dev);
+		netif_tx_disable(dev);
 		break;
 	default:
 		netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe);
@@ -1534,7 +1540,6 @@ static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
 	pr->rx_packets = rx_packets;
 
 	pr->port = port;
-	spin_lock_init(&pr->netif_queue);
 
 	pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0);
 	if (!pr->eq) {
@@ -2226,35 +2231,17 @@ static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
 	dev_kfree_skb(skb);
 }
 
-static inline int ehea_hash_skb(struct sk_buff *skb, int num_qps)
-{
-	struct tcphdr *tcp;
-	u32 tmp;
-
-	if ((skb->protocol == htons(ETH_P_IP)) &&
-	    (ip_hdr(skb)->protocol == IPPROTO_TCP)) {
-		tcp = (struct tcphdr *)(skb_network_header(skb) +
-					(ip_hdr(skb)->ihl * 4));
-		tmp = (tcp->source + (tcp->dest << 16)) % 31;
-		tmp += ip_hdr(skb)->daddr % 31;
-		return tmp % num_qps;
-	} else
-		return 0;
-}
-
 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct ehea_port *port = netdev_priv(dev);
 	struct ehea_swqe *swqe;
-	unsigned long flags;
 	u32 lkey;
 	int swqe_index;
 	struct ehea_port_res *pr;
+	struct netdev_queue *txq;
 
-	pr = &port->port_res[ehea_hash_skb(skb, port->num_tx_qps)];
-
-	if (pr->queue_stopped)
-		return NETDEV_TX_BUSY;
+	pr = &port->port_res[skb_get_queue_mapping(skb)];
+	txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
 
 	swqe = ehea_get_swqe(pr->qp, &swqe_index);
 	memset(swqe, 0, SWQE_HEADER_SIZE);
@@ -2304,20 +2291,15 @@ static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		ehea_dump(swqe, 512, "swqe");
 
 	if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) {
-		netif_stop_queue(dev);
+		netif_tx_stop_queue(txq);
 		swqe->tx_control |= EHEA_SWQE_PURGE;
 	}
 
 	ehea_post_swqe(pr->qp, swqe);
 
 	if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
-		spin_lock_irqsave(&pr->netif_queue, flags);
-		if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) {
-			pr->p_stats.queue_stopped++;
-			netif_stop_queue(dev);
-			pr->queue_stopped = 1;
-		}
-		spin_unlock_irqrestore(&pr->netif_queue, flags);
+		pr->p_stats.queue_stopped++;
+		netif_tx_stop_queue(txq);
 	}
 
 	return NETDEV_TX_OK;
@@ -2642,7 +2624,7 @@ static int ehea_open(struct net_device *dev)
 	ret = ehea_up(dev);
 	if (!ret) {
 		port_napi_enable(port);
-		netif_start_queue(dev);
+		netif_tx_start_all_queues(dev);
 	}
 
 	mutex_unlock(&port->port_lock);
@@ -2688,7 +2670,7 @@ static int ehea_stop(struct net_device *dev)
 	cancel_work_sync(&port->reset_task);
 	cancel_delayed_work_sync(&port->stats_work);
 	mutex_lock(&port->port_lock);
-	netif_stop_queue(dev);
+	netif_tx_stop_all_queues(dev);
 	port_napi_disable(port);
 	ret = ehea_down(dev);
 	mutex_unlock(&port->port_lock);
@@ -2912,7 +2894,7 @@ static void ehea_reset_port(struct work_struct *work)
 	mutex_lock(&dlpar_mem_lock);
 	port->resets++;
 	mutex_lock(&port->port_lock);
-	netif_stop_queue(dev);
+	netif_tx_disable(dev);
 
 	port_napi_disable(port);
 
@@ -2928,7 +2910,7 @@ static void ehea_reset_port(struct work_struct *work)
 
 	port_napi_enable(port);
 
-	netif_wake_queue(dev);
+	netif_tx_wake_all_queues(dev);
 out:
 	mutex_unlock(&port->port_lock);
 	mutex_unlock(&dlpar_mem_lock);
@@ -2955,7 +2937,7 @@ static void ehea_rereg_mrs(void)
 
 				if (dev->flags & IFF_UP) {
 					mutex_lock(&port->port_lock);
-					netif_stop_queue(dev);
+					netif_tx_disable(dev);
 					ehea_flush_sq(port);
 					ret = ehea_stop_qps(dev);
 					if (ret) {
@@ -3000,7 +2982,7 @@ static void ehea_rereg_mrs(void)
 						if (!ret) {
 							check_sqs(port);
 							port_napi_enable(port);
-							netif_wake_queue(dev);
+							netif_tx_wake_all_queues(dev);
 						} else {
 							netdev_err(dev, "Unable to restart QPS\n");
 						}
@@ -3176,7 +3158,7 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
 	int jumbo;
 
 	/* allocate memory for the port structures */
-	dev = alloc_etherdev(sizeof(struct ehea_port));
+	dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES);
 
 	if (!dev) {
 		pr_err("no mem for net_device\n");
@@ -3208,6 +3190,10 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
 	if (ret)
 		goto out_free_mc_list;
 
+	netif_set_real_num_rx_queues(dev, port->num_def_qps);
+	netif_set_real_num_tx_queues(dev, port->num_def_qps +
+				     port->num_add_tx_qps);
+
 	port_dev = ehea_register_port(port, dn);
 	if (!port_dev)
 		goto out_free_mc_list;
-- 
1.7.4.4

[PATCH 03/15] ehea: Remove force_irq logic in napi poll routine

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

commit 18604c548545 (ehea: NAPI multi queue TX/RX path for SMP) added
driver specific logic for exiting napi mode. I'm not sure what it was
trying to solve and it should be up to the network stack to decide when
we are done polling so remove it.

v3:
[cascardo] Fixed extra parentheses.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea.h      |    1 -
 drivers/net/ethernet/ibm/ehea/ehea_main.c |   13 +++----------
 2 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea.h b/drivers/net/ethernet/ibm/ehea/ehea.h
index e247927..4a4d466 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea.h
+++ b/drivers/net/ethernet/ibm/ehea/ehea.h
@@ -383,7 +383,6 @@ struct ehea_port_res {
 	u64 tx_bytes;
 	u64 rx_packets;
 	u64 rx_bytes;
-	u32 poll_counter;
 	struct net_lro_mgr lro_mgr;
 	struct net_lro_desc lro_desc[MAX_LRO_DESCRIPTORS];
 	int sq_restart_flag;
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index a6c4192..4032a0a 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -926,7 +926,6 @@ static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota)
 	return cqe;
 }
 
-#define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 #define EHEA_POLL_MAX_CQES 65535
 
 static int ehea_poll(struct napi_struct *napi, int budget)
@@ -936,18 +935,13 @@ static int ehea_poll(struct napi_struct *napi, int budget)
 	struct net_device *dev = pr->port->netdev;
 	struct ehea_cqe *cqe;
 	struct ehea_cqe *cqe_skb = NULL;
-	int force_irq, wqe_index;
+	int wqe_index;
 	int rx = 0;
 
-	force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 	cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
+	rx += ehea_proc_rwqes(dev, pr, budget - rx);
 
-	if (!force_irq)
-		rx += ehea_proc_rwqes(dev, pr, budget - rx);
-
-	while ((rx != budget) || force_irq) {
-		pr->poll_counter = 0;
-		force_irq = 0;
+	while (rx != budget) {
 		napi_complete(napi);
 		ehea_reset_cq_ep(pr->recv_cq);
 		ehea_reset_cq_ep(pr->send_cq);
@@ -967,7 +961,6 @@ static int ehea_poll(struct napi_struct *napi, int budget)
 		rx += ehea_proc_rwqes(dev, pr, budget - rx);
 	}
 
-	pr->poll_counter++;
 	return rx;
 }
 
-- 
1.7.4.4

[PATCH 04/15] ehea: Remove num_tx_qps module option

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

The num_tx_qps module option allows a user to configure a different
number of tx and rx queues. Now the networking stack is multiqueue
aware it makes little sense just to enable the tx queues and not the
rx queues so remove the option.

v3:
[cascardo] fixed conflict with get_stats change

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea.h      |    3 --
 drivers/net/ethernet/ibm/ehea/ehea_main.c |   51 ++++++++++------------------
 2 files changed, 18 insertions(+), 36 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea.h b/drivers/net/ethernet/ibm/ehea/ehea.h
index 4a4d466..8e7c594 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea.h
+++ b/drivers/net/ethernet/ibm/ehea/ehea.h
@@ -58,7 +58,6 @@
 #define EHEA_MIN_ENTRIES_QP  127
 
 #define EHEA_SMALL_QUEUES
-#define EHEA_NUM_TX_QP 1
 #define EHEA_LRO_MAX_AGGR 64
 
 #ifdef EHEA_SMALL_QUEUES
@@ -460,8 +459,6 @@ struct ehea_port {
 	char int_aff_name[EHEA_IRQ_NAME_SIZE];
 	int allmulti;			 /* Indicates IFF_ALLMULTI state */
 	int promisc;		 	 /* Indicates IFF_PROMISC state */
-	int num_tx_qps;
-	int num_add_tx_qps;
 	int num_mcs;
 	int resets;
 	unsigned long flags;
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 4032a0a..6ded42a 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -64,7 +64,6 @@ static int sq_entries = EHEA_DEF_ENTRIES_SQ;
 static int use_mcs = 1;
 static int use_lro;
 static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
-static int num_tx_qps = EHEA_NUM_TX_QP;
 static int prop_carrier_state;
 
 module_param(msg_level, int, 0);
@@ -76,9 +75,7 @@ module_param(prop_carrier_state, int, 0);
 module_param(use_mcs, int, 0);
 module_param(use_lro, int, 0);
 module_param(lro_max_aggr, int, 0);
-module_param(num_tx_qps, int, 0);
 
-MODULE_PARM_DESC(num_tx_qps, "Number of TX-QPS");
 MODULE_PARM_DESC(msg_level, "msg_level");
 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
 		 "port to stack. 1:yes, 0:no.  Default = 0 ");
@@ -174,7 +171,7 @@ static void ehea_update_firmware_handles(void)
 				continue;
 
 			num_ports++;
-			num_portres += port->num_def_qps + port->num_add_tx_qps;
+			num_portres += port->num_def_qps;
 		}
 	}
 
@@ -200,9 +197,7 @@ static void ehea_update_firmware_handles(void)
 			    (num_ports == 0))
 				continue;
 
-			for (l = 0;
-			     l < port->num_def_qps + port->num_add_tx_qps;
-			     l++) {
+			for (l = 0; l < port->num_def_qps; l++) {
 				struct ehea_port_res *pr = &port->port_res[l];
 
 				arr[i].adh = adapter->handle;
@@ -340,7 +335,7 @@ static struct net_device_stats *ehea_get_stats(struct net_device *dev)
 		rx_bytes   += port->port_res[i].rx_bytes;
 	}
 
-	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+	for (i = 0; i < port->num_def_qps; i++) {
 		tx_packets += port->port_res[i].tx_packets;
 		tx_bytes   += port->port_res[i].tx_bytes;
 	}
@@ -810,7 +805,7 @@ static void reset_sq_restart_flag(struct ehea_port *port)
 {
 	int i;
 
-	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+	for (i = 0; i < port->num_def_qps; i++) {
 		struct ehea_port_res *pr = &port->port_res[i];
 		pr->sq_restart_flag = 0;
 	}
@@ -823,7 +818,7 @@ static void check_sqs(struct ehea_port *port)
 	int swqe_index;
 	int i, k;
 
-	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+	for (i = 0; i < port->num_def_qps; i++) {
 		struct ehea_port_res *pr = &port->port_res[i];
 		int ret;
 		k = 0;
@@ -1112,13 +1107,6 @@ int ehea_sense_port_attr(struct ehea_port *port)
 		goto out_free;
 	}
 
-	port->num_tx_qps = num_tx_qps;
-
-	if (port->num_def_qps >= port->num_tx_qps)
-		port->num_add_tx_qps = 0;
-	else
-		port->num_add_tx_qps = port->num_tx_qps - port->num_def_qps;
-
 	ret = 0;
 out_free:
 	if (ret || netif_msg_probe(port))
@@ -1359,7 +1347,7 @@ static int ehea_reg_interrupts(struct net_device *dev)
 		   port->qp_eq->attr.ist1);
 
 
-	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+	for (i = 0; i < port->num_def_qps; i++) {
 		pr = &port->port_res[i];
 		snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1,
 			 "%s-queue%d", dev->name, i);
@@ -1402,7 +1390,7 @@ static void ehea_free_interrupts(struct net_device *dev)
 
 	/* send */
 
-	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+	for (i = 0; i < port->num_def_qps; i++) {
 		pr = &port->port_res[i];
 		ibmebus_free_irq(pr->eq->attr.ist1, pr);
 		netif_info(port, intr, dev,
@@ -2438,8 +2426,7 @@ out:
 	return ret;
 }
 
-static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
-			       int add_tx_qps)
+static int ehea_port_res_setup(struct ehea_port *port, int def_qps)
 {
 	int ret, i;
 	struct port_res_cfg pr_cfg, pr_cfg_small_rx;
@@ -2472,7 +2459,7 @@ static int ehea_port_res_setup(struct ehea_port *port, int def_qps,
 		if (ret)
 			goto out_clean_pr;
 	}
-	for (i = def_qps; i < def_qps + add_tx_qps; i++) {
+	for (i = def_qps; i < def_qps; i++) {
 		ret = ehea_init_port_res(port, &port->port_res[i],
 					 &pr_cfg_small_rx, i);
 		if (ret)
@@ -2495,7 +2482,7 @@ static int ehea_clean_all_portres(struct ehea_port *port)
 	int ret = 0;
 	int i;
 
-	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
+	for (i = 0; i < port->num_def_qps; i++)
 		ret |= ehea_clean_portres(port, &port->port_res[i]);
 
 	ret |= ehea_destroy_eq(port->qp_eq);
@@ -2527,8 +2514,7 @@ static int ehea_up(struct net_device *dev)
 	if (port->state == EHEA_PORT_UP)
 		return 0;
 
-	ret = ehea_port_res_setup(port, port->num_def_qps,
-				  port->num_add_tx_qps);
+	ret = ehea_port_res_setup(port, port->num_def_qps);
 	if (ret) {
 		netdev_err(dev, "port_res_failed\n");
 		goto out;
@@ -2547,7 +2533,7 @@ static int ehea_up(struct net_device *dev)
 		goto out_clean_pr;
 	}
 
-	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+	for (i = 0; i < port->num_def_qps; i++) {
 		ret = ehea_activate_qp(port->adapter, port->port_res[i].qp);
 		if (ret) {
 			netdev_err(dev, "activate_qp failed\n");
@@ -2593,7 +2579,7 @@ static void port_napi_disable(struct ehea_port *port)
 {
 	int i;
 
-	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
+	for (i = 0; i < port->num_def_qps; i++)
 		napi_disable(&port->port_res[i].napi);
 }
 
@@ -2601,7 +2587,7 @@ static void port_napi_enable(struct ehea_port *port)
 {
 	int i;
 
-	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++)
+	for (i = 0; i < port->num_def_qps; i++)
 		napi_enable(&port->port_res[i].napi);
 }
 
@@ -2689,7 +2675,7 @@ static void ehea_flush_sq(struct ehea_port *port)
 {
 	int i;
 
-	for (i = 0; i < port->num_def_qps + port->num_add_tx_qps; i++) {
+	for (i = 0; i < port->num_def_qps; i++) {
 		struct ehea_port_res *pr = &port->port_res[i];
 		int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count;
 		int ret;
@@ -2723,7 +2709,7 @@ int ehea_stop_qps(struct net_device *dev)
 		goto out;
 	}
 
-	for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
+	for (i = 0; i < (port->num_def_qps); i++) {
 		struct ehea_port_res *pr =  &port->port_res[i];
 		struct ehea_qp *qp = pr->qp;
 
@@ -2825,7 +2811,7 @@ int ehea_restart_qps(struct net_device *dev)
 		goto out;
 	}
 
-	for (i = 0; i < (port->num_def_qps + port->num_add_tx_qps); i++) {
+	for (i = 0; i < (port->num_def_qps); i++) {
 		struct ehea_port_res *pr =  &port->port_res[i];
 		struct ehea_qp *qp = pr->qp;
 
@@ -3184,8 +3170,7 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
 		goto out_free_mc_list;
 
 	netif_set_real_num_rx_queues(dev, port->num_def_qps);
-	netif_set_real_num_tx_queues(dev, port->num_def_qps +
-				     port->num_add_tx_qps);
+	netif_set_real_num_tx_queues(dev, port->num_def_qps);
 
 	port_dev = ehea_register_port(port, dn);
 	if (!port_dev)
-- 
1.7.4.4

[PATCH 05/15] ehea: Dont check NETIF_F_TSO in TX path

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

It seems like the ehea xmit routine and an ethtool change of TSO
mode could race, resulting in corrupt packets. Checking gso_size
is enough and we can use the helper function.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea_main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 6ded42a..0cb3a9b 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -1787,7 +1787,7 @@ static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
 	swqe->descriptors = 0;
 	sg1entry_contains_frag_data = 0;
 
-	if ((dev->features & NETIF_F_TSO) && skb_shinfo(skb)->gso_size)
+	if (skb_is_gso(skb))
 		write_swqe2_TSO(skb, swqe, lkey);
 	else
 		write_swqe2_nonTSO(skb, swqe, lkey);
-- 
1.7.4.4

[PATCH 06/15] ehea: Add vlan_features

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

We weren't enabling any VLAN features so we missed out on checksum
offload and TSO when using VLANs. Enable them.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea_main.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 0cb3a9b..1321809 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -3190,6 +3190,8 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
 		      | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
 		      | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER
 		      | NETIF_F_RXCSUM;
+	dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA |
+			NETIF_F_IP_CSUM;
 	dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
 
 	if (use_lro)
-- 
1.7.4.4

[PATCH 07/15] ehea: Allocate large enough skbs to avoid partial cacheline DMA writes

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

The ehea adapter has a mode where it will avoid partial cacheline DMA
writes on receive by always padding packets to fall on a cacheline
boundary.

Unfortunately we currently aren't allocating enough space for a full
ethernet MTU packet to be rounded up, so this optimisation doesn't hit.

It's unfortunate that the next largest packet size exposed by the
hypervisor interface is 2kB, meaning our skb allocation comes out of a
4kB SLAB. However the performance increase due to this optimisation is
quite large and my TCP stream numbers increase from 900MB to 1000MB/sec.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea.h b/drivers/net/ethernet/ibm/ehea/ehea.h
index 8e7c594..7aa47d8 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea.h
+++ b/drivers/net/ethernet/ibm/ehea/ehea.h
@@ -82,7 +82,7 @@
 #define EHEA_SG_RQ3 0
 
 #define EHEA_MAX_PACKET_SIZE    9022	/* for jumbo frames */
-#define EHEA_RQ2_PKT_SIZE       1522
+#define EHEA_RQ2_PKT_SIZE       2048
 #define EHEA_L_PKT_SIZE         256	/* low latency */
 
 #define MAX_LRO_DESCRIPTORS 8
@@ -93,7 +93,7 @@
 #define EHEA_PD_ID        0xaabcdeff
 
 #define EHEA_RQ2_THRESHOLD 	   1
-#define EHEA_RQ3_THRESHOLD 	   9	/* use RQ3 threshold of 1522 bytes */
+#define EHEA_RQ3_THRESHOLD	   4	/* use RQ3 threshold of 2048 bytes */
 
 #define EHEA_SPEED_10G         10000
 #define EHEA_SPEED_1G           1000
-- 
1.7.4.4

[PATCH 08/15] ehea: Simplify ehea_xmit2 and ehea_xmit3

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

Based on a patch from Michael Ellerman, clean up a significant
portion of the transmit path. There was a lot of duplication here.
Even worse, we were always checksumming tx packets and ignoring the
skb->ip_summed field.

Also remove NETIF_F_FRAGLIST from dev->features, I'm not sure why
it was enabled.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea_main.c |  137 ++++++++---------------------
 1 files changed, 36 insertions(+), 101 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 1321809..77aafba 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -1676,37 +1676,6 @@ static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
 	return ret;
 }
 
-/*
- * The write_* functions store information in swqe which is used by
- * the hardware to calculate the ip/tcp/udp checksum
- */
-
-static inline void write_ip_start_end(struct ehea_swqe *swqe,
-				      const struct sk_buff *skb)
-{
-	swqe->ip_start = skb_network_offset(skb);
-	swqe->ip_end = (u8)(swqe->ip_start + ip_hdrlen(skb) - 1);
-}
-
-static inline void write_tcp_offset_end(struct ehea_swqe *swqe,
-					const struct sk_buff *skb)
-{
-	swqe->tcp_offset =
-		(u8)(swqe->ip_end + 1 + offsetof(struct tcphdr, check));
-
-	swqe->tcp_end = (u16)skb->len - 1;
-}
-
-static inline void write_udp_offset_end(struct ehea_swqe *swqe,
-					const struct sk_buff *skb)
-{
-	swqe->tcp_offset =
-		(u8)(swqe->ip_end + 1 + offsetof(struct udphdr, check));
-
-	swqe->tcp_end = (u16)skb->len - 1;
-}
-
-
 static void write_swqe2_TSO(struct sk_buff *skb,
 			    struct ehea_swqe *swqe, u32 lkey)
 {
@@ -2105,41 +2074,46 @@ static int ehea_change_mtu(struct net_device *dev, int new_mtu)
 	return 0;
 }
 
-static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
-		       struct ehea_swqe *swqe, u32 lkey)
+static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
 {
-	if (skb->protocol == htons(ETH_P_IP)) {
-		const struct iphdr *iph = ip_hdr(skb);
+	swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC;
 
-		/* IPv4 */
-		swqe->tx_control |= EHEA_SWQE_CRC
-				 | EHEA_SWQE_IP_CHECKSUM
-				 | EHEA_SWQE_TCP_CHECKSUM
-				 | EHEA_SWQE_IMM_DATA_PRESENT
-				 | EHEA_SWQE_DESCRIPTORS_PRESENT;
+	if (skb->protocol != htons(ETH_P_IP))
+		return;
 
-		write_ip_start_end(swqe, skb);
+	if (skb->ip_summed == CHECKSUM_PARTIAL)
+		swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM;
 
-		if (iph->protocol == IPPROTO_UDP) {
-			if ((iph->frag_off & IP_MF) ||
-			    (iph->frag_off & IP_OFFSET))
-				/* IP fragment, so don't change cs */
-				swqe->tx_control &= ~EHEA_SWQE_TCP_CHECKSUM;
-			else
-				write_udp_offset_end(swqe, skb);
-		} else if (iph->protocol == IPPROTO_TCP) {
-			write_tcp_offset_end(swqe, skb);
-		}
+	swqe->ip_start = skb_network_offset(skb);
+	swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1;
 
-		/* icmp (big data) and ip segmentation packets (all other ip
-		   packets) do not require any special handling */
+	switch (ip_hdr(skb)->protocol) {
+	case IPPROTO_UDP:
+		if (skb->ip_summed == CHECKSUM_PARTIAL)
+			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
 
-	} else {
-		/* Other Ethernet Protocol */
-		swqe->tx_control |= EHEA_SWQE_CRC
-				 | EHEA_SWQE_IMM_DATA_PRESENT
-				 | EHEA_SWQE_DESCRIPTORS_PRESENT;
+		swqe->tcp_offset = swqe->ip_end + 1 +
+				   offsetof(struct udphdr, check);
+		swqe->tcp_end = skb->len - 1;
+		break;
+
+	case IPPROTO_TCP:
+		if (skb->ip_summed == CHECKSUM_PARTIAL)
+			swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM;
+
+		swqe->tcp_offset = swqe->ip_end + 1 +
+				   offsetof(struct tcphdr, check);
+		swqe->tcp_end = skb->len - 1;
+		break;
 	}
+}
+
+static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
+		       struct ehea_swqe *swqe, u32 lkey)
+{
+	swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT;
+
+	xmit_common(skb, swqe);
 
 	write_swqe2_data(skb, dev, swqe, lkey);
 }
@@ -2152,51 +2126,11 @@ static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
 	skb_frag_t *frag;
 	int i;
 
-	if (skb->protocol == htons(ETH_P_IP)) {
-		const struct iphdr *iph = ip_hdr(skb);
+	xmit_common(skb, swqe);
 
-		/* IPv4 */
-		write_ip_start_end(swqe, skb);
-
-		if (iph->protocol == IPPROTO_TCP) {
-			swqe->tx_control |= EHEA_SWQE_CRC
-					 | EHEA_SWQE_IP_CHECKSUM
-					 | EHEA_SWQE_TCP_CHECKSUM
-					 | EHEA_SWQE_IMM_DATA_PRESENT;
-
-			write_tcp_offset_end(swqe, skb);
-
-		} else if (iph->protocol == IPPROTO_UDP) {
-			if ((iph->frag_off & IP_MF) ||
-			    (iph->frag_off & IP_OFFSET))
-				/* IP fragment, so don't change cs */
-				swqe->tx_control |= EHEA_SWQE_CRC
-						 | EHEA_SWQE_IMM_DATA_PRESENT;
-			else {
-				swqe->tx_control |= EHEA_SWQE_CRC
-						 | EHEA_SWQE_IP_CHECKSUM
-						 | EHEA_SWQE_TCP_CHECKSUM
-						 | EHEA_SWQE_IMM_DATA_PRESENT;
-
-				write_udp_offset_end(swqe, skb);
-			}
-		} else {
-			/* icmp (big data) and
-			   ip segmentation packets (all other ip packets) */
-			swqe->tx_control |= EHEA_SWQE_CRC
-					 | EHEA_SWQE_IP_CHECKSUM
-					 | EHEA_SWQE_IMM_DATA_PRESENT;
-		}
-	} else {
-		/* Other Ethernet Protocol */
-		swqe->tx_control |= EHEA_SWQE_CRC | EHEA_SWQE_IMM_DATA_PRESENT;
-	}
-	/* copy (immediate) data */
 	if (nfrags == 0) {
-		/* data is in a single piece */
 		skb_copy_from_linear_data(skb, imm_data, skb->len);
 	} else {
-		/* first copy data from the skb->data buffer ... */
 		skb_copy_from_linear_data(skb, imm_data,
 					  skb_headlen(skb));
 		imm_data += skb_headlen(skb);
@@ -2208,6 +2142,7 @@ static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
 			imm_data += frag->size;
 		}
 	}
+
 	swqe->immediate_data_length = skb->len;
 	dev_kfree_skb(skb);
 }
@@ -3184,7 +3119,7 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
 	dev->netdev_ops = &ehea_netdev_ops;
 	ehea_set_ethtool_ops(dev);
 
-	dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
+	dev->hw_features = NETIF_F_SG | NETIF_F_TSO
 		      | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO;
 	dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO
 		      | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX
-- 
1.7.4.4

[PATCH 09/15] ehea: Merge swqe2 TSO and non TSO paths

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

write_swqe2_TSO and write_swqe2_nonTSO are almost identical.

For TSO we have to set the TSO and mss bits in the wqe and we only
put the header in the immediate area, no data. Collapse both
functions into write_swqe2_immediate.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea_main.c |   76 ++++++++---------------------
 1 files changed, 21 insertions(+), 55 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 77aafba..0fc0ae8 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -1676,65 +1676,35 @@ static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr)
 	return ret;
 }
 
-static void write_swqe2_TSO(struct sk_buff *skb,
-			    struct ehea_swqe *swqe, u32 lkey)
-{
-	struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
-	u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
-	int skb_data_size = skb_headlen(skb);
-	int headersize;
-
-	/* Packet is TCP with TSO enabled */
-	swqe->tx_control |= EHEA_SWQE_TSO;
-	swqe->mss = skb_shinfo(skb)->gso_size;
-	/* copy only eth/ip/tcp headers to immediate data and
-	 * the rest of skb->data to sg1entry
-	 */
-	headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
-
-	skb_data_size = skb_headlen(skb);
-
-	if (skb_data_size >= headersize) {
-		/* copy immediate data */
-		skb_copy_from_linear_data(skb, imm_data, headersize);
-		swqe->immediate_data_length = headersize;
-
-		if (skb_data_size > headersize) {
-			/* set sg1entry data */
-			sg1entry->l_key = lkey;
-			sg1entry->len = skb_data_size - headersize;
-			sg1entry->vaddr =
-				ehea_map_vaddr(skb->data + headersize);
-			swqe->descriptors++;
-		}
-	} else
-		pr_err("cannot handle fragmented headers\n");
-}
-
-static void write_swqe2_nonTSO(struct sk_buff *skb,
-			       struct ehea_swqe *swqe, u32 lkey)
+static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe,
+				  u32 lkey)
 {
 	int skb_data_size = skb_headlen(skb);
 	u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0];
 	struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry;
+	unsigned int immediate_len = SWQE2_MAX_IMM;
+
+	swqe->descriptors = 0;
 
-	/* Packet is any nonTSO type
-	 *
-	 * Copy as much as possible skb->data to immediate data and
-	 * the rest to sg1entry
-	 */
-	if (skb_data_size >= SWQE2_MAX_IMM) {
-		/* copy immediate data */
-		skb_copy_from_linear_data(skb, imm_data, SWQE2_MAX_IMM);
+	if (skb_is_gso(skb)) {
+		swqe->tx_control |= EHEA_SWQE_TSO;
+		swqe->mss = skb_shinfo(skb)->gso_size;
+		/*
+		 * For TSO packets we only copy the headers into the
+		 * immediate area.
+		 */
+		immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
+	}
 
-		swqe->immediate_data_length = SWQE2_MAX_IMM;
+	if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) {
+		skb_copy_from_linear_data(skb, imm_data, immediate_len);
+		swqe->immediate_data_length = immediate_len;
 
-		if (skb_data_size > SWQE2_MAX_IMM) {
-			/* copy sg1entry data */
+		if (skb_data_size > immediate_len) {
 			sg1entry->l_key = lkey;
-			sg1entry->len = skb_data_size - SWQE2_MAX_IMM;
+			sg1entry->len = skb_data_size - immediate_len;
 			sg1entry->vaddr =
-				ehea_map_vaddr(skb->data + SWQE2_MAX_IMM);
+				ehea_map_vaddr(skb->data + immediate_len);
 			swqe->descriptors++;
 		}
 	} else {
@@ -1753,13 +1723,9 @@ static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev,
 	nfrags = skb_shinfo(skb)->nr_frags;
 	sg1entry = &swqe->u.immdata_desc.sg_entry;
 	sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list;
-	swqe->descriptors = 0;
 	sg1entry_contains_frag_data = 0;
 
-	if (skb_is_gso(skb))
-		write_swqe2_TSO(skb, swqe, lkey);
-	else
-		write_swqe2_nonTSO(skb, swqe, lkey);
+	write_swqe2_immediate(skb, swqe, lkey);
 
 	/* write descriptors */
 	if (nfrags > 0) {
-- 
1.7.4.4

[PATCH 10/15] ehea: Simplify type 3 transmit routine

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

If a nonlinear skb fits within the immediate area, use skb_copy_bits
instead of copying the frags by hand.

v3:
[cascardo] fixed conflict with use of skb frag API

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea_main.c |   19 +++----------------
 1 files changed, 3 insertions(+), 16 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 0fc0ae8..289ad4d 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -2087,27 +2087,14 @@ static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev,
 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev,
 		       struct ehea_swqe *swqe)
 {
-	int nfrags = skb_shinfo(skb)->nr_frags;
 	u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0];
-	skb_frag_t *frag;
-	int i;
 
 	xmit_common(skb, swqe);
 
-	if (nfrags == 0) {
+	if (!skb->data_len)
 		skb_copy_from_linear_data(skb, imm_data, skb->len);
-	} else {
-		skb_copy_from_linear_data(skb, imm_data,
-					  skb_headlen(skb));
-		imm_data += skb_headlen(skb);
-
-		/* ... then copy data from the fragments */
-		for (i = 0; i < nfrags; i++) {
-			frag = &skb_shinfo(skb)->frags[i];
-			memcpy(imm_data, skb_frag_address(frag), frag->size);
-			imm_data += frag->size;
-		}
-	}
+	else
+		skb_copy_bits(skb, 0, imm_data, skb->len);
 
 	swqe->immediate_data_length = skb->len;
 	dev_kfree_skb(skb);
-- 
1.7.4.4

[PATCH 11/15] ehea: Remove some unused definitions

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

The queue macros are many levels deep and it makes it harder to
work your way through them when many of the versions are unused.
Remove the unused versions.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea_hw.h |   25 -------------------------
 1 files changed, 0 insertions(+), 25 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_hw.h b/drivers/net/ethernet/ibm/ehea/ehea_hw.h
index 567981b..1a2fe4d 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_hw.h
+++ b/drivers/net/ethernet/ibm/ehea/ehea_hw.h
@@ -210,36 +210,11 @@ static inline void epa_store_acc(struct h_epa epa, u32 offset, u64 value)
 	__raw_writeq(value, (void __iomem *)(epa.addr + offset));
 }
 
-#define epa_store_eq(epa, offset, value)\
-	epa_store(epa, EQTEMM_OFFSET(offset), value)
-#define epa_load_eq(epa, offset)\
-	epa_load(epa, EQTEMM_OFFSET(offset))
-
 #define epa_store_cq(epa, offset, value)\
 	epa_store(epa, CQTEMM_OFFSET(offset), value)
 #define epa_load_cq(epa, offset)\
 	epa_load(epa, CQTEMM_OFFSET(offset))
 
-#define epa_store_qp(epa, offset, value)\
-	epa_store(epa, QPTEMM_OFFSET(offset), value)
-#define epa_load_qp(epa, offset)\
-	epa_load(epa, QPTEMM_OFFSET(offset))
-
-#define epa_store_qped(epa, offset, value)\
-	epa_store(epa, QPEDMM_OFFSET(offset), value)
-#define epa_load_qped(epa, offset)\
-	epa_load(epa, QPEDMM_OFFSET(offset))
-
-#define epa_store_mrmw(epa, offset, value)\
-	epa_store(epa, MRMWMM_OFFSET(offset), value)
-#define epa_load_mrmw(epa, offset)\
-	epa_load(epa, MRMWMM_OFFSET(offset))
-
-#define epa_store_base(epa, offset, value)\
-	epa_store(epa, HCAGR_OFFSET(offset), value)
-#define epa_load_base(epa, offset)\
-	epa_load(epa, HCAGR_OFFSET(offset))
-
 static inline void ehea_update_sqa(struct ehea_qp *qp, u16 nr_wqes)
 {
 	struct h_epa epa = qp->epas.kernel;
-- 
1.7.4.4

[PATCH 12/15] ehea: Add 64bit statistics

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

Switch to using ndo_get_stats64 to get 64bit statistics.

v3:
[cascardo] use rtnl_link_stats64 as port stats

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea.h      |    2 +-
 drivers/net/ethernet/ibm/ehea/ehea_main.c |    8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea.h b/drivers/net/ethernet/ibm/ehea/ehea.h
index 7aa47d8..c9dbe52 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea.h
+++ b/drivers/net/ethernet/ibm/ehea/ehea.h
@@ -448,7 +448,7 @@ struct ehea_bcmc_reg_array {
 struct ehea_port {
 	struct ehea_adapter *adapter;	 /* adapter that owns this port */
 	struct net_device *netdev;
-	struct net_device_stats stats;
+	struct rtnl_link_stats64 stats;
 	struct ehea_port_res port_res[EHEA_MAX_PORT_RES];
 	struct platform_device  ofdev; /* Open Firmware Device */
 	struct ehea_mc_list *mc_list;	 /* Multicast MAC addresses */
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 289ad4d..a0a3c5f 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -323,10 +323,10 @@ out:
 	spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags);
 }
 
-static struct net_device_stats *ehea_get_stats(struct net_device *dev)
+static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev,
+					struct rtnl_link_stats64 *stats)
 {
 	struct ehea_port *port = netdev_priv(dev);
-	struct net_device_stats *stats = &port->stats;
 	u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0;
 	int i;
 
@@ -353,7 +353,7 @@ static void ehea_update_stats(struct work_struct *work)
 	struct ehea_port *port =
 		container_of(work, struct ehea_port, stats_work.work);
 	struct net_device *dev = port->netdev;
-	struct net_device_stats *stats = &port->stats;
+	struct rtnl_link_stats64 *stats = &port->stats;
 	struct hcp_ehea_port_cb2 *cb2;
 	u64 hret;
 
@@ -3004,7 +3004,7 @@ static const struct net_device_ops ehea_netdev_ops = {
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= ehea_netpoll,
 #endif
-	.ndo_get_stats		= ehea_get_stats,
+	.ndo_get_stats64	= ehea_get_stats64,
 	.ndo_set_mac_address	= ehea_set_mac_addr,
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_set_rx_mode	= ehea_set_multicast_list,
-- 
1.7.4.4

[PATCH 13/15] ehea: Remove LRO support

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

In preparation for adding GRO to ehea, remove LRO.

v3:
[cascardo] fixed conflict with vlan cleanup

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea.h         |    7 ---
 drivers/net/ethernet/ibm/ehea/ehea_ethtool.c |   16 -------
 drivers/net/ethernet/ibm/ehea/ehea_main.c    |   61 +-------------------------
 3 files changed, 1 insertions(+), 83 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea.h b/drivers/net/ethernet/ibm/ehea/ehea.h
index c9dbe52..410d6a1 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea.h
+++ b/drivers/net/ethernet/ibm/ehea/ehea.h
@@ -33,7 +33,6 @@
 #include <linux/ethtool.h>
 #include <linux/vmalloc.h>
 #include <linux/if_vlan.h>
-#include <linux/inet_lro.h>
 
 #include <asm/ibmebus.h>
 #include <asm/abs_addr.h>
@@ -58,7 +57,6 @@
 #define EHEA_MIN_ENTRIES_QP  127
 
 #define EHEA_SMALL_QUEUES
-#define EHEA_LRO_MAX_AGGR 64
 
 #ifdef EHEA_SMALL_QUEUES
 #define EHEA_MAX_CQE_COUNT      1023
@@ -85,8 +83,6 @@
 #define EHEA_RQ2_PKT_SIZE       2048
 #define EHEA_L_PKT_SIZE         256	/* low latency */
 
-#define MAX_LRO_DESCRIPTORS 8
-
 /* Send completion signaling */
 
 /* Protection Domain Identifier */
@@ -382,8 +378,6 @@ struct ehea_port_res {
 	u64 tx_bytes;
 	u64 rx_packets;
 	u64 rx_bytes;
-	struct net_lro_mgr lro_mgr;
-	struct net_lro_desc lro_desc[MAX_LRO_DESCRIPTORS];
 	int sq_restart_flag;
 };
 
@@ -468,7 +462,6 @@ struct ehea_port {
 	u32 msg_enable;
 	u32 sig_comp_iv;
 	u32 state;
-	u32 lro_max_aggr;
 	u8 phy_link;
 	u8 full_duplex;
 	u8 autoneg;
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_ethtool.c b/drivers/net/ethernet/ibm/ehea/ehea_ethtool.c
index d185016..05b7359 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_ethtool.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_ethtool.c
@@ -205,9 +205,6 @@ static const char ehea_ethtool_stats_keys[][ETH_GSTRING_LEN] = {
 	{"PR13 free_swqes"},
 	{"PR14 free_swqes"},
 	{"PR15 free_swqes"},
-	{"LRO aggregated"},
-	{"LRO flushed"},
-	{"LRO no_desc"},
 };
 
 static void ehea_get_strings(struct net_device *dev, u32 stringset, u8 *data)
@@ -264,19 +261,6 @@ static void ehea_get_ethtool_stats(struct net_device *dev,
 
 	for (k = 0; k < 16; k++)
 		data[i++] = atomic_read(&port->port_res[k].swqe_avail);
-
-	for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
-		tmp |= port->port_res[k].lro_mgr.stats.aggregated;
-	data[i++] = tmp;
-
-	for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
-		tmp |= port->port_res[k].lro_mgr.stats.flushed;
-	data[i++] = tmp;
-
-	for (k = 0, tmp = 0; k < EHEA_MAX_PORT_RES; k++)
-		tmp |= port->port_res[k].lro_mgr.stats.no_desc;
-	data[i++] = tmp;
-
 }
 
 const struct ethtool_ops ehea_ethtool_ops = {
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index a0a3c5f..3b8e657 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -62,8 +62,6 @@ static int rq2_entries = EHEA_DEF_ENTRIES_RQ2;
 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3;
 static int sq_entries = EHEA_DEF_ENTRIES_SQ;
 static int use_mcs = 1;
-static int use_lro;
-static int lro_max_aggr = EHEA_LRO_MAX_AGGR;
 static int prop_carrier_state;
 
 module_param(msg_level, int, 0);
@@ -73,8 +71,6 @@ module_param(rq3_entries, int, 0);
 module_param(sq_entries, int, 0);
 module_param(prop_carrier_state, int, 0);
 module_param(use_mcs, int, 0);
-module_param(use_lro, int, 0);
-module_param(lro_max_aggr, int, 0);
 
 MODULE_PARM_DESC(msg_level, "msg_level");
 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical "
@@ -94,11 +90,6 @@ MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue  "
 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, "
 		 "Default = 1");
 
-MODULE_PARM_DESC(lro_max_aggr, " LRO: Max packets to be aggregated. Default = "
-		 __MODULE_STRING(EHEA_LRO_MAX_AGGR));
-MODULE_PARM_DESC(use_lro, " Large Receive Offload, 1: enable, 0: disable, "
-		 "Default = 0");
-
 static int port_name_cnt;
 static LIST_HEAD(adapter_list);
 static unsigned long ehea_driver_flags;
@@ -656,47 +647,13 @@ static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 	return 0;
 }
 
-static int get_skb_hdr(struct sk_buff *skb, void **iphdr,
-		       void **tcph, u64 *hdr_flags, void *priv)
-{
-	struct ehea_cqe *cqe = priv;
-	unsigned int ip_len;
-	struct iphdr *iph;
-
-	/* non tcp/udp packets */
-	if (!cqe->header_length)
-		return -1;
-
-	/* non tcp packet */
-	skb_reset_network_header(skb);
-	iph = ip_hdr(skb);
-	if (iph->protocol != IPPROTO_TCP)
-		return -1;
-
-	ip_len = ip_hdrlen(skb);
-	skb_set_transport_header(skb, ip_len);
-	*tcph = tcp_hdr(skb);
-
-	/* check if ip header and tcp header are complete */
-	if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
-		return -1;
-
-	*hdr_flags = LRO_IPV4 | LRO_TCP;
-	*iphdr = iph;
-
-	return 0;
-}
-
 static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
 			  struct sk_buff *skb)
 {
 	if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
 		__vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
 
-	if (skb->dev->features & NETIF_F_LRO)
-		lro_receive_skb(&pr->lro_mgr, skb, cqe);
-	else
-		netif_receive_skb(skb);
+	netif_receive_skb(skb);
 }
 
 static int ehea_proc_rwqes(struct net_device *dev,
@@ -786,8 +743,6 @@ static int ehea_proc_rwqes(struct net_device *dev,
 		}
 		cqe = ehea_poll_rq1(qp, &wqe_index);
 	}
-	if (dev->features & NETIF_F_LRO)
-		lro_flush_all(&pr->lro_mgr);
 
 	pr->rx_packets += processed;
 	pr->rx_bytes += processed_bytes;
@@ -1611,15 +1566,6 @@ static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr,
 
 	netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64);
 
-	pr->lro_mgr.max_aggr = pr->port->lro_max_aggr;
-	pr->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS;
-	pr->lro_mgr.lro_arr = pr->lro_desc;
-	pr->lro_mgr.get_skb_header = get_skb_hdr;
-	pr->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
-	pr->lro_mgr.dev = port->netdev;
-	pr->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
-	pr->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
-
 	ret = 0;
 	goto out;
 
@@ -3082,9 +3028,6 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
 			NETIF_F_IP_CSUM;
 	dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT;
 
-	if (use_lro)
-		dev->features |= NETIF_F_LRO;
-
 	INIT_WORK(&port->reset_task, ehea_reset_port);
 	INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats);
 
@@ -3098,8 +3041,6 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
 		goto out_unreg_port;
 	}
 
-	port->lro_max_aggr = lro_max_aggr;
-
 	ret = ehea_get_jumboframe_status(port, &jumbo);
 	if (ret)
 		netdev_err(dev, "failed determining jumbo frame status\n");
-- 
1.7.4.4

[PATCH 14/15] ehea: Add GRO support

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

Add GRO support to the ehea driver.

v3:
[cascardo] no need to enable GRO, since it's enabled by default
[cascardo] vgrp was removed in the vlan cleanup

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea_main.c |   15 +++++----------
 1 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 3b8e657..bfd08b2 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -647,15 +647,6 @@ static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq,
 	return 0;
 }
 
-static void ehea_proc_skb(struct ehea_port_res *pr, struct ehea_cqe *cqe,
-			  struct sk_buff *skb)
-{
-	if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
-		__vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
-
-	netif_receive_skb(skb);
-}
-
 static int ehea_proc_rwqes(struct net_device *dev,
 			   struct ehea_port_res *pr,
 			   int budget)
@@ -732,7 +723,11 @@ static int ehea_proc_rwqes(struct net_device *dev,
 			}
 
 			processed_bytes += skb->len;
-			ehea_proc_skb(pr, cqe, skb);
+
+			if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT)
+				__vlan_hwaccel_put_tag(skb, cqe->vlan_tag);
+
+			napi_gro_receive(&pr->napi, skb);
 		} else {
 			pr->p_stats.poll_receive_errors++;
 			port_reset = ehea_treat_poll_error(pr, rq, cqe,
-- 
1.7.4.4

[PATCH 15/15] ehea: Remove unused tcp_end field in send WQ

[Thadeu Lima de Souza Cascardo]

From: Anton Blanchard <anton@samba.org>

The tcp_end field is not actually used by the hardware, so there
is no need to set it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ehea/ehea_main.c |    2 --
 drivers/net/ethernet/ibm/ehea/ehea_qmr.h  |    2 +-
 2 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index bfd08b2..adb462d 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -2001,7 +2001,6 @@ static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
 
 		swqe->tcp_offset = swqe->ip_end + 1 +
 				   offsetof(struct udphdr, check);
-		swqe->tcp_end = skb->len - 1;
 		break;
 
 	case IPPROTO_TCP:
@@ -2010,7 +2009,6 @@ static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe)
 
 		swqe->tcp_offset = swqe->ip_end + 1 +
 				   offsetof(struct tcphdr, check);
-		swqe->tcp_end = skb->len - 1;
 		break;
 	}
 }
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_qmr.h b/drivers/net/ethernet/ibm/ehea/ehea_qmr.h
index fddff8e..337a47e 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_qmr.h
+++ b/drivers/net/ethernet/ibm/ehea/ehea_qmr.h
@@ -107,7 +107,7 @@ struct ehea_swqe {
 	u8 immediate_data_length;
 	u8 tcp_offset;
 	u8 reserved2;
-	u16 tcp_end;
+	u16 reserved2b;
 	u8 wrap_tag;
 	u8 descriptors;		/* number of valid descriptors in WQE */
 	u16 reserved3;
-- 
1.7.4.4

Re: EHEA updates

[David Miller]

From: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Date: Fri, 14 Oct 2011 12:30:57 -0300

> This is a rebase of Anton's patches on top of net-next HEAD, commit
> 7ae60b3. Besides the conflicts with the latest patches, some trivia were
> fixed as suggested.
> 
> Ben Hutchings' suggestions about doing packet split and NAPI fixes were
> taken into consideration, but not done on this round.
> 
> The result was tested between two LPARs and also using a switch, with
> ICMP and TCP tests.

Nice work, all applied, thanks.

[PATCH 00/15] ehea updates v2

[Anton Blanchard]

Ben, Jesse, Michael: thanks for the review. Here is an updated set of
patches based on the comments.

Anton

[PATCH 11/15] ehea: Remove some unused definitions

[Anton Blanchard]

[-- Attachment #1: ehea_15.patch --]
[-- Type: text/plain, Size: 1728 bytes --]

The queue macros are many levels deep and it makes it harder to
work your way through them when many of the versions are unused.
Remove the unused versions.

Signed-off-by: Anton Blanchard <anton@samba.org>
---

Index: linux-net/drivers/net/ehea/ehea_hw.h
===================================================================
--- linux-net.orig/drivers/net/ehea/ehea_hw.h	2011-05-12 07:47:05.769421104 +1000
+++ linux-net/drivers/net/ehea/ehea_hw.h	2011-05-12 07:48:01.630306772 +1000
@@ -210,36 +210,11 @@ static inline void epa_store_acc(struct
 	__raw_writeq(value, (void __iomem *)(epa.addr + offset));
 }
 
-#define epa_store_eq(epa, offset, value)\
-	epa_store(epa, EQTEMM_OFFSET(offset), value)
-#define epa_load_eq(epa, offset)\
-	epa_load(epa, EQTEMM_OFFSET(offset))
-
 #define epa_store_cq(epa, offset, value)\
 	epa_store(epa, CQTEMM_OFFSET(offset), value)
 #define epa_load_cq(epa, offset)\
 	epa_load(epa, CQTEMM_OFFSET(offset))
 
-#define epa_store_qp(epa, offset, value)\
-	epa_store(epa, QPTEMM_OFFSET(offset), value)
-#define epa_load_qp(epa, offset)\
-	epa_load(epa, QPTEMM_OFFSET(offset))
-
-#define epa_store_qped(epa, offset, value)\
-	epa_store(epa, QPEDMM_OFFSET(offset), value)
-#define epa_load_qped(epa, offset)\
-	epa_load(epa, QPEDMM_OFFSET(offset))
-
-#define epa_store_mrmw(epa, offset, value)\
-	epa_store(epa, MRMWMM_OFFSET(offset), value)
-#define epa_load_mrmw(epa, offset)\
-	epa_load(epa, MRMWMM_OFFSET(offset))
-
-#define epa_store_base(epa, offset, value)\
-	epa_store(epa, HCAGR_OFFSET(offset), value)
-#define epa_load_base(epa, offset)\
-	epa_load(epa, HCAGR_OFFSET(offset))
-
 static inline void ehea_update_sqa(struct ehea_qp *qp, u16 nr_wqes)
 {
 	struct h_epa epa = qp->epas.kernel;