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Commit b47385bd authored by Divy Le Ray's avatar Divy Le Ray Committed by Jeff Garzik
Browse files

cxgb3 - Add LRO support 



Add LRO support.

Signed-off-by: default avatarDivy Le Ray <divy@chelsio.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 7385ecf3

drivers/net/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -2409,6 +2409,7 @@ config CHELSIO_T3 
	tristate "Chelsio Communications T3 10Gb Ethernet support"

	depends on PCI

	select FW_LOADER

	select INET_LRO

	help

	  This driver supports Chelsio T3-based gigabit and 10Gb Ethernet

	  adapters.

drivers/net/cxgb3/adapter.h

+14 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ 
#include <linux/cache.h>

#include <linux/mutex.h>

#include <linux/bitops.h>

#include <linux/inet_lro.h>

#include "t3cdev.h"

#include <asm/io.h>
@@ -173,16 +174,29 @@ enum { /* per port SGE statistics */ 
	SGE_PSTAT_TX_CSUM,	/* # of TX checksum offloads */

	SGE_PSTAT_VLANEX,	/* # of VLAN tag extractions */

	SGE_PSTAT_VLANINS,	/* # of VLAN tag insertions */

	SGE_PSTAT_LRO_AGGR,	/* # of page chunks added to LRO sessions */

	SGE_PSTAT_LRO_FLUSHED,	/* # of flushed LRO sessions */

	SGE_PSTAT_LRO_NO_DESC,	/* # of overflown LRO sessions */



	SGE_PSTAT_MAX		/* must be last */

};



#define T3_MAX_LRO_SES 8

#define T3_MAX_LRO_MAX_PKTS 64



struct sge_qset {		/* an SGE queue set */

	struct adapter *adap;

	struct napi_struct napi;

	struct sge_rspq rspq;

	struct sge_fl fl[SGE_RXQ_PER_SET];

	struct sge_txq txq[SGE_TXQ_PER_SET];

	struct net_lro_mgr lro_mgr;

	struct net_lro_desc lro_desc[T3_MAX_LRO_SES];

	struct skb_frag_struct *lro_frag_tbl;

	int lro_nfrags;

	int lro_enabled;

	int lro_frag_len;

	void *lro_va;

	struct net_device *netdev;

	unsigned long txq_stopped;	/* which Tx queues are stopped */

	struct timer_list tx_reclaim_timer;	/* reclaims TX buffers */

drivers/net/cxgb3/common.h

+1 −0
Original line number Diff line number Diff line
@@ -351,6 +351,7 @@ struct tp_params { 


struct qset_params {		/* SGE queue set parameters */

	unsigned int polling;	/* polling/interrupt service for rspq */

	unsigned int lro;	/* large receive offload */

	unsigned int coalesce_usecs;	/* irq coalescing timer */

	unsigned int rspq_size;	/* # of entries in response queue */

	unsigned int fl_size;	/* # of entries in regular free list */

drivers/net/cxgb3/cxgb3_ioctl.h

+1 −0
Original line number Diff line number Diff line
@@ -90,6 +90,7 @@ struct ch_qset_params { 
	int32_t fl_size[2];

	int32_t intr_lat;

	int32_t polling;

	int32_t lro;

	int32_t cong_thres;

};

drivers/net/cxgb3/cxgb3_main.c

+19 −0
Original line number Diff line number Diff line
@@ -1212,6 +1212,9 @@ static char stats_strings[][ETH_GSTRING_LEN] = { 
	"VLANinsertions     ",

	"TxCsumOffload      ",

	"RxCsumGood         ",

	"LroAggregated      ",

	"LroFlushed         ",

	"LroNoDesc          ",

	"RxDrops            ",



	"CheckTXEnToggled   ",
@@ -1340,6 +1343,9 @@ static void get_stats(struct net_device *dev, struct ethtool_stats *stats, 
	*data++ = collect_sge_port_stats(adapter, pi, SGE_PSTAT_VLANINS);

	*data++ = collect_sge_port_stats(adapter, pi, SGE_PSTAT_TX_CSUM);

	*data++ = collect_sge_port_stats(adapter, pi, SGE_PSTAT_RX_CSUM_GOOD);

	*data++ = collect_sge_port_stats(adapter, pi, SGE_PSTAT_LRO_AGGR);

	*data++ = collect_sge_port_stats(adapter, pi, SGE_PSTAT_LRO_FLUSHED);

	*data++ = collect_sge_port_stats(adapter, pi, SGE_PSTAT_LRO_NO_DESC);

	*data++ = s->rx_cong_drops;



	*data++ = s->num_toggled;
@@ -1558,6 +1564,13 @@ static int set_rx_csum(struct net_device *dev, u32 data) 
	struct port_info *p = netdev_priv(dev);



	p->rx_csum_offload = data;

	if (!data) {

		struct adapter *adap = p->adapter;

		int i;



		for (i = p->first_qset; i < p->first_qset + p->nqsets; i++)

			adap->sge.qs[i].lro_enabled = 0;

	}

	return 0;

}
@@ -1830,6 +1843,11 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr) 
				}

			}

		}

		if (t.lro >= 0) {

			struct sge_qset *qs = &adapter->sge.qs[t.qset_idx];

			q->lro = t.lro;

			qs->lro_enabled = t.lro;

		}

		break;

	}

	case CHELSIO_GET_QSET_PARAMS:{
@@ -1849,6 +1867,7 @@ static int cxgb_extension_ioctl(struct net_device *dev, void __user *useraddr) 
		t.fl_size[0] = q->fl_size;

		t.fl_size[1] = q->jumbo_size;

		t.polling = q->polling;

		t.lro = q->lro;

		t.intr_lat = q->coalesce_usecs;

		t.cong_thres = q->cong_thres;