diff mbox

s2io: add dynamic LRO disable support

Message ID 20100625044510.GC2739@exar.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Jon Mason June 25, 2010, 4:45 a.m. UTC
This patch adds dynamic LRO disable support for s2io net driver,
enables LRO by default, increases the driver version number, and
corrects the name of the LRO modparm.

This is mostly Wang's patch based on Neil's initial work, heavily
modified based on Ramkrishna's suggestions.  This has been tested on
a Neterion Xframe adapter and verified via adapter LRO statistics.

Signed-off-by: Jon Mason <jon.mason@exar.com>
Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: Neil Horman <nhorman@redhat.com>
Acked-by: Neil Horman <nhorman@redhat.com>
Reviewed-by: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Ramkrishna Vepa <Ramkrishna.Vepa@exar.com>

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Comments

Amerigo Wang June 25, 2010, 9:09 a.m. UTC | #1
On 06/25/10 12:45, Jon Mason wrote:
> This patch adds dynamic LRO disable support for s2io net driver,
> enables LRO by default, increases the driver version number, and
> corrects the name of the LRO modparm.
>

Very good work, Jon! I believe this version is the best we have.

Thanks again!
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David Miller June 29, 2010, 6:04 a.m. UTC | #2
From: Jon Mason <jon.mason@exar.com>
Date: Thu, 24 Jun 2010 23:45:10 -0500

> This patch adds dynamic LRO disable support for s2io net driver,
> enables LRO by default, increases the driver version number, and
> corrects the name of the LRO modparm.
> 
> This is mostly Wang's patch based on Neil's initial work, heavily
> modified based on Ramkrishna's suggestions.  This has been tested on
> a Neterion Xframe adapter and verified via adapter LRO statistics.
> 
> Signed-off-by: Jon Mason <jon.mason@exar.com>
> Signed-off-by: WANG Cong <amwang@redhat.com>
> Signed-off-by: Neil Horman <nhorman@redhat.com>
> Acked-by: Neil Horman <nhorman@redhat.com>
> Reviewed-by: Stanislaw Gruszka <sgruszka@redhat.com>
> Cc: Ramkrishna Vepa <Ramkrishna.Vepa@exar.com>

Applied to net-next-2.6
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diff mbox

Patch

diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index 668327c..a032d72 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -38,7 +38,7 @@ 
  * Tx descriptors that can be associated with each corresponding FIFO.
  * intr_type: This defines the type of interrupt. The values can be 0(INTA),
  *     2(MSI_X). Default value is '2(MSI_X)'
- * lro_enable: Specifies whether to enable Large Receive Offload (LRO) or not.
+ * lro: Specifies whether to enable Large Receive Offload (LRO) or not.
  *     Possible values '1' for enable '0' for disable. Default is '0'
  * lro_max_pkts: This parameter defines maximum number of packets can be
  *     aggregated as a single large packet
@@ -90,7 +90,7 @@ 
 #include "s2io.h"
 #include "s2io-regs.h"
 
-#define DRV_VERSION "2.0.26.25"
+#define DRV_VERSION "2.0.26.26"
 
 /* S2io Driver name & version. */
 static char s2io_driver_name[] = "Neterion";
@@ -496,7 +496,7 @@  S2IO_PARM_INT(rxsync_frequency, 3);
 /* Interrupt type. Values can be 0(INTA), 2(MSI_X) */
 S2IO_PARM_INT(intr_type, 2);
 /* Large receive offload feature */
-static unsigned int lro_enable;
+static unsigned int lro_enable = 1;
 module_param_named(lro, lro_enable, uint, 0);
 
 /* Max pkts to be aggregated by LRO at one time. If not specified,
@@ -795,7 +795,6 @@  static int init_shared_mem(struct s2io_nic *nic)
 		ring->rx_curr_put_info.ring_len = rx_cfg->num_rxd - 1;
 		ring->nic = nic;
 		ring->ring_no = i;
-		ring->lro = lro_enable;
 
 		blk_cnt = rx_cfg->num_rxd / (rxd_count[nic->rxd_mode] + 1);
 		/*  Allocating all the Rx blocks */
@@ -6675,6 +6674,7 @@  static u32 s2io_ethtool_op_get_tso(struct net_device *dev)
 {
 	return (dev->features & NETIF_F_TSO) != 0;
 }
+
 static int s2io_ethtool_op_set_tso(struct net_device *dev, u32 data)
 {
 	if (data)
@@ -6685,6 +6685,42 @@  static int s2io_ethtool_op_set_tso(struct net_device *dev, u32 data)
 	return 0;
 }
 
+static int s2io_ethtool_set_flags(struct net_device *dev, u32 data)
+{
+	struct s2io_nic *sp = netdev_priv(dev);
+	int rc = 0;
+	int changed = 0;
+
+	if (data & ~ETH_FLAG_LRO)
+		return -EOPNOTSUPP;
+
+	if (data & ETH_FLAG_LRO) {
+		if (lro_enable) {
+			if (!(dev->features & NETIF_F_LRO)) {
+				dev->features |= NETIF_F_LRO;
+				changed = 1;
+			}
+		} else
+			rc = -EINVAL;
+	} else if (dev->features & NETIF_F_LRO) {
+		dev->features &= ~NETIF_F_LRO;
+		changed = 1;
+	}
+
+	if (changed && netif_running(dev)) {
+		s2io_stop_all_tx_queue(sp);
+		s2io_card_down(sp);
+		sp->lro = !!(dev->features & NETIF_F_LRO);
+		rc = s2io_card_up(sp);
+		if (rc)
+			s2io_reset(sp);
+		else
+			s2io_start_all_tx_queue(sp);
+	}
+
+	return rc;
+}
+
 static const struct ethtool_ops netdev_ethtool_ops = {
 	.get_settings = s2io_ethtool_gset,
 	.set_settings = s2io_ethtool_sset,
@@ -6701,6 +6737,8 @@  static const struct ethtool_ops netdev_ethtool_ops = {
 	.get_rx_csum = s2io_ethtool_get_rx_csum,
 	.set_rx_csum = s2io_ethtool_set_rx_csum,
 	.set_tx_csum = s2io_ethtool_op_set_tx_csum,
+	.set_flags = s2io_ethtool_set_flags,
+	.get_flags = ethtool_op_get_flags,
 	.set_sg = ethtool_op_set_sg,
 	.get_tso = s2io_ethtool_op_get_tso,
 	.set_tso = s2io_ethtool_op_set_tso,
@@ -7229,6 +7267,7 @@  static int s2io_card_up(struct s2io_nic *sp)
 		struct ring_info *ring = &mac_control->rings[i];
 
 		ring->mtu = dev->mtu;
+		ring->lro = sp->lro;
 		ret = fill_rx_buffers(sp, ring, 1);
 		if (ret) {
 			DBG_PRINT(ERR_DBG, "%s: Out of memory in Open\n",
@@ -7974,7 +8013,8 @@  s2io_init_nic(struct pci_dev *pdev, const struct pci_device_id *pre)
 	dev->netdev_ops = &s2io_netdev_ops;
 	SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
 	dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
-
+	if (lro_enable)
+		dev->features |= NETIF_F_LRO;
 	dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
 	if (sp->high_dma_flag == true)
 		dev->features |= NETIF_F_HIGHDMA;