Commit 958de193 authored by Jon Mason's avatar Jon Mason Committed by David S. Miller
Browse files

s2io: add dynamic LRO disable support 



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: default avatarJon Mason <jon.mason@exar.com>
Signed-off-by: default avatarWANG Cong <amwang@redhat.com>
Signed-off-by: default avatarNeil Horman <nhorman@redhat.com>
Acked-by: default avatarNeil Horman <nhorman@redhat.com>
Reviewed-by: default avatarStanislaw Gruszka <sgruszka@redhat.com>
Cc: Ramkrishna Vepa <Ramkrishna.Vepa@exar.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 172d69e6

drivers/net/s2io.c

+45 −5
Original line number Diff line number Diff line
@@ -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;

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