jenna
/
kernel_samsung_sm7125
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge branch 'lro'

Browse Source
tirimbino
Jeff Garzik 19 years ago
parent 75e47b3600 79dc190147
commit 2ade43618b
2 changed files with 565 additions and 62 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 589
      drivers/net/s2io.c
  2. 38
      drivers/net/s2io.h

589
drivers/net/s2io.c
Unescape View File

@ -57,16 +57,20 @@
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <net/tcp.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/div64.h>
/* local include */
#include "s2io.h"
#include "s2io-regs.h"
#define DRV_VERSION "Version 2.0.9.4"
#define DRV_VERSION "2.0.11.2"
/* S2io Driver name & version. */
static char s2io_driver_name[] = "Neterion";
@ -168,6 +172,11 @@ static char ethtool_stats_keys[][ETH_GSTRING_LEN] = {
{"\n DRIVER STATISTICS"},
{"single_bit_ecc_errs"},
{"double_bit_ecc_errs"},
("lro_aggregated_pkts"),
("lro_flush_both_count"),
("lro_out_of_sequence_pkts"),
("lro_flush_due_to_max_pkts"),
("lro_avg_aggr_pkts"),
};
#define S2IO_STAT_LEN sizeof(ethtool_stats_keys)/ ETH_GSTRING_LEN
@ -317,6 +326,12 @@ static unsigned int indicate_max_pkts;
static unsigned int rxsync_frequency = 3;
/* Interrupt type. Values can be 0(INTA), 1(MSI), 2(MSI_X) */
static unsigned int intr_type = 0;
/* Large receive offload feature */
static unsigned int lro = 0;
/* Max pkts to be aggregated by LRO at one time. If not specified,
* aggregation happens until we hit max IP pkt size(64K)
*/
static unsigned int lro_max_pkts = 0xFFFF;
/*
* S2IO device table.
@ -1476,6 +1491,19 @@ static int init_nic(struct s2io_nic *nic)
writel((u32) (val64 >> 32), (add + 4));
val64 = readq(&bar0->mac_cfg);
/* Enable FCS stripping by adapter */
add = &bar0->mac_cfg;
val64 = readq(&bar0->mac_cfg);
val64 |= MAC_CFG_RMAC_STRIP_FCS;
if (nic->device_type == XFRAME_II_DEVICE)
writeq(val64, &bar0->mac_cfg);
else {
writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
writel((u32) (val64), add);
writeq(RMAC_CFG_KEY(0x4C0D), &bar0->rmac_cfg_key);
writel((u32) (val64 >> 32), (add + 4));
}
/*
* Set the time value to be inserted in the pause frame
* generated by xena.
@ -2569,6 +2597,8 @@ static void rx_intr_handler(ring_info_t *ring_data)
#ifndef CONFIG_S2IO_NAPI
int pkt_cnt = 0;
#endif
int i;
spin_lock(&nic->rx_lock);
if (atomic_read(&nic->card_state) == CARD_DOWN) {
DBG_PRINT(INTR_DBG, "%s: %s going down for reset\n",
@ -2661,6 +2691,18 @@ static void rx_intr_handler(ring_info_t *ring_data)
break;
#endif
}
if (nic->lro) {
/* Clear all LRO sessions before exiting */
for (i=0; i<MAX_LRO_SESSIONS; i++) {
lro_t *lro = &nic->lro0_n[i];
if (lro->in_use) {
update_L3L4_header(nic, lro);
queue_rx_frame(lro->parent);
clear_lro_session(lro);
}
}
}
spin_unlock(&nic->rx_lock);
}
@ -3668,23 +3710,32 @@ s2io_msi_handle(int irq, void *dev_id, struct pt_regs *regs)
* else schedule a tasklet to reallocate the buffers.
*/
for (i = 0; i < config->rx_ring_num; i++) {
int rxb_size = atomic_read(&sp->rx_bufs_left[i]);
int level = rx_buffer_level(sp, rxb_size, i);
if ((level == PANIC) && (!TASKLET_IN_USE)) {
DBG_PRINT(INTR_DBG, "%s: Rx BD hit ", dev->name);
DBG_PRINT(INTR_DBG, "PANIC levels\n");
if ((ret = fill_rx_buffers(sp, i)) == -ENOMEM) {
DBG_PRINT(ERR_DBG, "%s:Out of memory",
dev->name);
DBG_PRINT(ERR_DBG, " in ISR!!\n");
if (!sp->lro) {
int rxb_size = atomic_read(&sp->rx_bufs_left[i]);
int level = rx_buffer_level(sp, rxb_size, i);
if ((level == PANIC) && (!TASKLET_IN_USE)) {
DBG_PRINT(INTR_DBG, "%s: Rx BD hit ",
dev->name);
DBG_PRINT(INTR_DBG, "PANIC levels\n");
if ((ret = fill_rx_buffers(sp, i)) == -ENOMEM) {
DBG_PRINT(ERR_DBG, "%s:Out of memory",
dev->name);
DBG_PRINT(ERR_DBG, " in ISR!!\n");
clear_bit(0, (&sp->tasklet_status));
atomic_dec(&sp->isr_cnt);
return IRQ_HANDLED;
}
clear_bit(0, (&sp->tasklet_status));
atomic_dec(&sp->isr_cnt);
return IRQ_HANDLED;
} else if (level == LOW) {
tasklet_schedule(&sp->task);
}
clear_bit(0, (&sp->tasklet_status));
} else if (level == LOW) {
tasklet_schedule(&sp->task);
}
else if (fill_rx_buffers(sp, i) == -ENOMEM) {
DBG_PRINT(ERR_DBG, "%s:Out of memory",
dev->name);
DBG_PRINT(ERR_DBG, " in Rx Intr!!\n");
break;
}
}
@ -3697,29 +3748,37 @@ s2io_msix_ring_handle(int irq, void *dev_id, struct pt_regs *regs)
{
ring_info_t *ring = (ring_info_t *)dev_id;
nic_t *sp = ring->nic;
struct net_device *dev = (struct net_device *) dev_id;
int rxb_size, level, rng_n;
atomic_inc(&sp->isr_cnt);
rx_intr_handler(ring);
rng_n = ring->ring_no;
rxb_size = atomic_read(&sp->rx_bufs_left[rng_n]);
level = rx_buffer_level(sp, rxb_size, rng_n);
if ((level == PANIC) && (!TASKLET_IN_USE)) {
int ret;
DBG_PRINT(INTR_DBG, "%s: Rx BD hit ", __FUNCTION__);
DBG_PRINT(INTR_DBG, "PANIC levels\n");
if ((ret = fill_rx_buffers(sp, rng_n)) == -ENOMEM) {
DBG_PRINT(ERR_DBG, "Out of memory in %s",
__FUNCTION__);
if (!sp->lro) {
rxb_size = atomic_read(&sp->rx_bufs_left[rng_n]);
level = rx_buffer_level(sp, rxb_size, rng_n);
if ((level == PANIC) && (!TASKLET_IN_USE)) {
int ret;
DBG_PRINT(INTR_DBG, "%s: Rx BD hit ", __FUNCTION__);
DBG_PRINT(INTR_DBG, "PANIC levels\n");
if ((ret = fill_rx_buffers(sp, rng_n)) == -ENOMEM) {
DBG_PRINT(ERR_DBG, "Out of memory in %s",
__FUNCTION__);
clear_bit(0, (&sp->tasklet_status));
return IRQ_HANDLED;
}
clear_bit(0, (&sp->tasklet_status));
return IRQ_HANDLED;
} else if (level == LOW) {
tasklet_schedule(&sp->task);
}
clear_bit(0, (&sp->tasklet_status));
} else if (level == LOW) {
tasklet_schedule(&sp->task);
}
else if (fill_rx_buffers(sp, rng_n) == -ENOMEM) {
DBG_PRINT(ERR_DBG, "%s:Out of memory", dev->name);
DBG_PRINT(ERR_DBG, " in Rx Intr!!\n");
}
atomic_dec(&sp->isr_cnt);
return IRQ_HANDLED;
@ -3875,24 +3934,33 @@ static irqreturn_t s2io_isr(int irq, void *dev_id, struct pt_regs *regs)
*/
#ifndef CONFIG_S2IO_NAPI
for (i = 0; i < config->rx_ring_num; i++) {
int ret;
int rxb_size = atomic_read(&sp->rx_bufs_left[i]);
int level = rx_buffer_level(sp, rxb_size, i);
if ((level == PANIC) && (!TASKLET_IN_USE)) {
DBG_PRINT(INTR_DBG, "%s: Rx BD hit ", dev->name);
DBG_PRINT(INTR_DBG, "PANIC levels\n");
if ((ret = fill_rx_buffers(sp, i)) == -ENOMEM) {
DBG_PRINT(ERR_DBG, "%s:Out of memory",
dev->name);
DBG_PRINT(ERR_DBG, " in ISR!!\n");
if (!sp->lro) {
int ret;
int rxb_size = atomic_read(&sp->rx_bufs_left[i]);
int level = rx_buffer_level(sp, rxb_size, i);
if ((level == PANIC) && (!TASKLET_IN_USE)) {
DBG_PRINT(INTR_DBG, "%s: Rx BD hit ",
dev->name);
DBG_PRINT(INTR_DBG, "PANIC levels\n");
if ((ret = fill_rx_buffers(sp, i)) == -ENOMEM) {
DBG_PRINT(ERR_DBG, "%s:Out of memory",
dev->name);
DBG_PRINT(ERR_DBG, " in ISR!!\n");
clear_bit(0, (&sp->tasklet_status));
atomic_dec(&sp->isr_cnt);
return IRQ_HANDLED;
}
clear_bit(0, (&sp->tasklet_status));
atomic_dec(&sp->isr_cnt);
return IRQ_HANDLED;
} else if (level == LOW) {
tasklet_schedule(&sp->task);
}
clear_bit(0, (&sp->tasklet_status));
} else if (level == LOW) {
tasklet_schedule(&sp->task);
}
else if (fill_rx_buffers(sp, i) == -ENOMEM) {
DBG_PRINT(ERR_DBG, "%s:Out of memory",
dev->name);
DBG_PRINT(ERR_DBG, " in Rx intr!!\n");
break;
}
}
#endif
@ -5043,6 +5111,7 @@ static void s2io_get_ethtool_stats(struct net_device *dev,
int i = 0;
nic_t *sp = dev->priv;
StatInfo_t *stat_info = sp->mac_control.stats_info;
u64 tmp;
s2io_updt_stats(sp);
tmp_stats[i++] =
@ -5134,6 +5203,16 @@ static void s2io_get_ethtool_stats(struct net_device *dev,
tmp_stats[i++] = 0;
tmp_stats[i++] = stat_info->sw_stat.single_ecc_errs;
tmp_stats[i++] = stat_info->sw_stat.double_ecc_errs;
tmp_stats[i++] = stat_info->sw_stat.clubbed_frms_cnt;
tmp_stats[i++] = stat_info->sw_stat.sending_both;
tmp_stats[i++] = stat_info->sw_stat.outof_sequence_pkts;
tmp_stats[i++] = stat_info->sw_stat.flush_max_pkts;
tmp = 0;
if (stat_info->sw_stat.num_aggregations) {
tmp = stat_info->sw_stat.sum_avg_pkts_aggregated;
do_div(tmp, stat_info->sw_stat.num_aggregations);
}
tmp_stats[i++] = tmp;
}
static int s2io_ethtool_get_regs_len(struct net_device *dev)
@ -5515,6 +5594,14 @@ static int s2io_card_up(nic_t * sp)
/* Setting its receive mode */
s2io_set_multicast(dev);
if (sp->lro) {
/* Initialize max aggregatable pkts based on MTU */
sp->lro_max_aggr_per_sess = ((1<<16) - 1) / dev->mtu;
/* Check if we can use(if specified) user provided value */
if (lro_max_pkts < sp->lro_max_aggr_per_sess)
sp->lro_max_aggr_per_sess = lro_max_pkts;
}
/* Enable tasklet for the device */
tasklet_init(&sp->task, s2io_tasklet, (unsigned long) dev);
@ -5607,6 +5694,7 @@ static int rx_osm_handler(ring_info_t *ring_data, RxD_t * rxdp)
((unsigned long) rxdp->Host_Control);
int ring_no = ring_data->ring_no;
u16 l3_csum, l4_csum;
lro_t *lro;
skb->dev = dev;
if (rxdp->Control_1 & RXD_T_CODE) {
@ -5655,7 +5743,8 @@ static int rx_osm_handler(ring_info_t *ring_data, RxD_t * rxdp)
skb_put(skb, buf2_len);
}
if ((rxdp->Control_1 & TCP_OR_UDP_FRAME) &&
if ((rxdp->Control_1 & TCP_OR_UDP_FRAME) && ((!sp->lro) ||
(sp->lro && (!(rxdp->Control_1 & RXD_FRAME_IP_FRAG)))) &&
(sp->rx_csum)) {
l3_csum = RXD_GET_L3_CKSUM(rxdp->Control_1);
l4_csum = RXD_GET_L4_CKSUM(rxdp->Control_1);
@ -5666,6 +5755,54 @@ static int rx_osm_handler(ring_info_t *ring_data, RxD_t * rxdp)
* a flag in the RxD.
*/
skb->ip_summed = CHECKSUM_UNNECESSARY;
if (sp->lro) {
u32 tcp_len;
u8 *tcp;
int ret = 0;
ret = s2io_club_tcp_session(skb->data, &tcp,
&tcp_len, &lro, rxdp, sp);
switch (ret) {
case 3: /* Begin anew */
lro->parent = skb;
goto aggregate;
case 1: /* Aggregate */
{
lro_append_pkt(sp, lro,
skb, tcp_len);
goto aggregate;
}
case 4: /* Flush session */
{
lro_append_pkt(sp, lro,
skb, tcp_len);
queue_rx_frame(lro->parent);
clear_lro_session(lro);
sp->mac_control.stats_info->
sw_stat.flush_max_pkts++;
goto aggregate;
}
case 2: /* Flush both */
lro->parent->data_len =
lro->frags_len;
sp->mac_control.stats_info->
sw_stat.sending_both++;
queue_rx_frame(lro->parent);
clear_lro_session(lro);
goto send_up;
case 0: /* sessions exceeded */
case 5: /*
* First pkt in session not
* L3/L4 aggregatable
*/
break;
default:
DBG_PRINT(ERR_DBG,
"%s: Samadhana!!\n",
__FUNCTION__);
BUG();
}
}
} else {
/*
* Packet with erroneous checksum, let the
@ -5677,25 +5814,31 @@ static int rx_osm_handler(ring_info_t *ring_data, RxD_t * rxdp)
skb->ip_summed = CHECKSUM_NONE;
}
skb->protocol = eth_type_trans(skb, dev);
if (!sp->lro) {
skb->protocol = eth_type_trans(skb, dev);
#ifdef CONFIG_S2IO_NAPI
if (sp->vlgrp && RXD_GET_VLAN_TAG(rxdp->Control_2)) {
/* Queueing the vlan frame to the upper layer */
vlan_hwaccel_receive_skb(skb, sp->vlgrp,
RXD_GET_VLAN_TAG(rxdp->Control_2));
} else {
netif_receive_skb(skb);
}
if (sp->vlgrp && RXD_GET_VLAN_TAG(rxdp->Control_2)) {
/* Queueing the vlan frame to the upper layer */
vlan_hwaccel_receive_skb(skb, sp->vlgrp,
RXD_GET_VLAN_TAG(rxdp->Control_2));
} else {
netif_receive_skb(skb);
}
#else
if (sp->vlgrp && RXD_GET_VLAN_TAG(rxdp->Control_2)) {
/* Queueing the vlan frame to the upper layer */
vlan_hwaccel_rx(skb, sp->vlgrp,
RXD_GET_VLAN_TAG(rxdp->Control_2));
} else {
netif_rx(skb);
}
if (sp->vlgrp && RXD_GET_VLAN_TAG(rxdp->Control_2)) {
/* Queueing the vlan frame to the upper layer */
vlan_hwaccel_rx(skb, sp->vlgrp,
RXD_GET_VLAN_TAG(rxdp->Control_2));
} else {
netif_rx(skb);
}
#endif
} else {
send_up:
queue_rx_frame(skb);
}
dev->last_rx = jiffies;
aggregate:
atomic_dec(&sp->rx_bufs_left[ring_no]);
return SUCCESS;
}
@ -5807,6 +5950,8 @@ module_param(indicate_max_pkts, int, 0);
#endif
module_param(rxsync_frequency, int, 0);
module_param(intr_type, int, 0);
module_param(lro, int, 0);
module_param(lro_max_pkts, int, 0);
/**
* s2io_init_nic - Initialization of the adapter .
@ -5938,6 +6083,7 @@ Defaulting to INTA\n");
else
sp->device_type = XFRAME_I_DEVICE;
sp->lro = lro;
/* Initialize some PCI/PCI-X fields of the NIC. */
s2io_init_pci(sp);
@ -6241,6 +6387,10 @@ Defaulting to INTA\n");
DBG_PRINT(ERR_DBG, "%s: 3-Buffer mode support has been "
"enabled\n",dev->name);
if (sp->lro)
DBG_PRINT(ERR_DBG, "%s: Large receive offload enabled\n",
dev->name);
/* Initialize device name */
strcpy(sp->name, dev->name);
if (sp->device_type & XFRAME_II_DEVICE)
@ -6351,3 +6501,318 @@ static void s2io_closer(void)
module_init(s2io_starter);
module_exit(s2io_closer);
static int check_L2_lro_capable(u8 *buffer, struct iphdr **ip,
struct tcphdr **tcp, RxD_t *rxdp)
{
int ip_off;
u8 l2_type = (u8)((rxdp->Control_1 >> 37) & 0x7), ip_len;
if (!(rxdp->Control_1 & RXD_FRAME_PROTO_TCP)) {
DBG_PRINT(INIT_DBG,"%s: Non-TCP frames not supported for LRO\n",
__FUNCTION__);
return -1;
}
/* TODO:
* By default the VLAN field in the MAC is stripped by the card, if this
* feature is turned off in rx_pa_cfg register, then the ip_off field
* has to be shifted by a further 2 bytes
*/
switch (l2_type) {
case 0: /* DIX type */
case 4: /* DIX type with VLAN */
ip_off = HEADER_ETHERNET_II_802_3_SIZE;
break;
/* LLC, SNAP etc are considered non-mergeable */
default:
return -1;
}
*ip = (struct iphdr *)((u8 *)buffer + ip_off);
ip_len = (u8)((*ip)->ihl);
ip_len <<= 2;
*tcp = (struct tcphdr *)((unsigned long)*ip + ip_len);
return 0;
}
static int check_for_socket_match(lro_t *lro, struct iphdr *ip,
struct tcphdr *tcp)
{
DBG_PRINT(INFO_DBG,"%s: Been here...\n", __FUNCTION__);
if ((lro->iph->saddr != ip->saddr) || (lro->iph->daddr != ip->daddr) ||
(lro->tcph->source != tcp->source) || (lro->tcph->dest != tcp->dest))
return -1;
return 0;
}
static inline int get_l4_pyld_length(struct iphdr *ip, struct tcphdr *tcp)
{
return(ntohs(ip->tot_len) - (ip->ihl << 2) - (tcp->doff << 2));
}
static void initiate_new_session(lro_t *lro, u8 *l2h,
struct iphdr *ip, struct tcphdr *tcp, u32 tcp_pyld_len)
{
DBG_PRINT(INFO_DBG,"%s: Been here...\n", __FUNCTION__);
lro->l2h = l2h;
lro->iph = ip;
lro->tcph = tcp;
lro->tcp_next_seq = tcp_pyld_len + ntohl(tcp->seq);
lro->tcp_ack = ntohl(tcp->ack_seq);
lro->sg_num = 1;
lro->total_len = ntohs(ip->tot_len);
lro->frags_len = 0;
/*
* check if we saw TCP timestamp. Other consistency checks have
* already been done.
*/
if (tcp->doff == 8) {
u32 *ptr;
ptr = (u32 *)(tcp+1);
lro->saw_ts = 1;
lro->cur_tsval = *(ptr+1);
lro->cur_tsecr = *(ptr+2);
}
lro->in_use = 1;
}
static void update_L3L4_header(nic_t *sp, lro_t *lro)
{
struct iphdr *ip = lro->iph;
struct tcphdr *tcp = lro->tcph;
u16 nchk;
StatInfo_t *statinfo = sp->mac_control.stats_info;
DBG_PRINT(INFO_DBG,"%s: Been here...\n", __FUNCTION__);
/* Update L3 header */
ip->tot_len = htons(lro->total_len);
ip->check = 0;
nchk = ip_fast_csum((u8 *)lro->iph, ip->ihl);
ip->check = nchk;
/* Update L4 header */
tcp->ack_seq = lro->tcp_ack;
tcp->window = lro->window;
/* Update tsecr field if this session has timestamps enabled */
if (lro->saw_ts) {
u32 *ptr = (u32 *)(tcp + 1);
*(ptr+2) = lro->cur_tsecr;
}
/* Update counters required for calculation of
* average no. of packets aggregated.
*/
statinfo->sw_stat.sum_avg_pkts_aggregated += lro->sg_num;
statinfo->sw_stat.num_aggregations++;
}
static void aggregate_new_rx(lro_t *lro, struct iphdr *ip,
struct tcphdr *tcp, u32 l4_pyld)
{
DBG_PRINT(INFO_DBG,"%s: Been here...\n", __FUNCTION__);
lro->total_len += l4_pyld;
lro->frags_len += l4_pyld;
lro->tcp_next_seq += l4_pyld;
lro->sg_num++;
/* Update ack seq no. and window ad(from this pkt) in LRO object */
lro->tcp_ack = tcp->ack_seq;
lro->window = tcp->window;
if (lro->saw_ts) {
u32 *ptr;
/* Update tsecr and tsval from this packet */
ptr = (u32 *) (tcp + 1);
lro->cur_tsval = *(ptr + 1);
lro->cur_tsecr = *(ptr + 2);
}
}
static int verify_l3_l4_lro_capable(lro_t *l_lro, struct iphdr *ip,
struct tcphdr *tcp, u32 tcp_pyld_len)
{
u8 *ptr;
DBG_PRINT(INFO_DBG,"%s: Been here...\n", __FUNCTION__);
if (!tcp_pyld_len) {
/* Runt frame or a pure ack */
return -1;
}
if (ip->ihl != 5) /* IP has options */
return -1;
if (tcp->urg || tcp->psh || tcp->rst || tcp->syn || tcp->fin ||
!tcp->ack) {
/*
* Currently recognize only the ack control word and
* any other control field being set would result in
* flushing the LRO session
*/
return -1;
}
/*
* Allow only one TCP timestamp option. Don't aggregate if
* any other options are detected.
*/
if (tcp->doff != 5 && tcp->doff != 8)
return -1;
if (tcp->doff == 8) {
ptr = (u8 *)(tcp + 1);
while (*ptr == TCPOPT_NOP)
ptr++;
if (*ptr != TCPOPT_TIMESTAMP || *(ptr+1) != TCPOLEN_TIMESTAMP)
return -1;
/* Ensure timestamp value increases monotonically */
if (l_lro)
if (l_lro->cur_tsval > *((u32 *)(ptr+2)))
return -1;
/* timestamp echo reply should be non-zero */
if (*((u32 *)(ptr+6)) == 0)
return -1;
}
return 0;
}
static int
s2io_club_tcp_session(u8 *buffer, u8 **tcp, u32 *tcp_len, lro_t **lro,
RxD_t *rxdp, nic_t *sp)
{
struct iphdr *ip;
struct tcphdr *tcph;
int ret = 0, i;
if (!(ret = check_L2_lro_capable(buffer, &ip, (struct tcphdr **)tcp,
rxdp))) {
DBG_PRINT(INFO_DBG,"IP Saddr: %x Daddr: %x\n",
ip->saddr, ip->daddr);
} else {
return ret;
}
tcph = (struct tcphdr *)*tcp;
*tcp_len = get_l4_pyld_length(ip, tcph);
for (i=0; i<MAX_LRO_SESSIONS; i++) {
lro_t *l_lro = &sp->lro0_n[i];
if (l_lro->in_use) {
if (check_for_socket_match(l_lro, ip, tcph))
continue;
/* Sock pair matched */
*lro = l_lro;
if ((*lro)->tcp_next_seq != ntohl(tcph->seq)) {
DBG_PRINT(INFO_DBG, "%s:Out of order. expected "
"0x%x, actual 0x%x\n", __FUNCTION__,
(*lro)->tcp_next_seq,
ntohl(tcph->seq));
sp->mac_control.stats_info->
sw_stat.outof_sequence_pkts++;
ret = 2;
break;
}
if (!verify_l3_l4_lro_capable(l_lro, ip, tcph,*tcp_len))
ret = 1; /* Aggregate */
else
ret = 2; /* Flush both */
break;
}
}
if (ret == 0) {
/* Before searching for available LRO objects,
* check if the pkt is L3/L4 aggregatable. If not
* don't create new LRO session. Just send this
* packet up.
*/
if (verify_l3_l4_lro_capable(NULL, ip, tcph, *tcp_len)) {
return 5;
}
for (i=0; i<MAX_LRO_SESSIONS; i++) {
lro_t *l_lro = &sp->lro0_n[i];
if (!(l_lro->in_use)) {
*lro = l_lro;
ret = 3; /* Begin anew */
break;
}
}
}
if (ret == 0) { /* sessions exceeded */
DBG_PRINT(INFO_DBG,"%s:All LRO sessions already in use\n",
__FUNCTION__);
*lro = NULL;
return ret;
}
switch (ret) {
case 3:
initiate_new_session(*lro, buffer, ip, tcph, *tcp_len);
break;
case 2:
update_L3L4_header(sp, *lro);
break;
case 1:
aggregate_new_rx(*lro, ip, tcph, *tcp_len);
if ((*lro)->sg_num == sp->lro_max_aggr_per_sess) {
update_L3L4_header(sp, *lro);
ret = 4; /* Flush the LRO */
}
break;
default:
DBG_PRINT(ERR_DBG,"%s:Dont know, can't say!!\n",
__FUNCTION__);
break;
}
return ret;
}
static void clear_lro_session(lro_t *lro)
{
static u16 lro_struct_size = sizeof(lro_t);
memset(lro, 0, lro_struct_size);
}
static void queue_rx_frame(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
skb->protocol = eth_type_trans(skb, dev);
#ifdef CONFIG_S2IO_NAPI
netif_receive_skb(skb);
#else
netif_rx(skb);
#endif
}
static void lro_append_pkt(nic_t *sp, lro_t *lro, struct sk_buff *skb,
u32 tcp_len)
{
struct sk_buff *tmp, *first = lro->parent;
first->len += tcp_len;
first->data_len = lro->frags_len;
skb_pull(skb, (skb->len - tcp_len));
if ((tmp = skb_shinfo(first)->frag_list)) {
while (tmp->next)
tmp = tmp->next;
tmp->next = skb;
}
else
skb_shinfo(first)->frag_list = skb;
sp->mac_control.stats_info->sw_stat.clubbed_frms_cnt++;
return;
}

38
drivers/net/s2io.h
Unescape View File

@ -78,6 +78,13 @@ static int debug_level = ERR_DBG;
typedef struct {
unsigned long long single_ecc_errs;
unsigned long long double_ecc_errs;
/* LRO statistics */
unsigned long long clubbed_frms_cnt;
unsigned long long sending_both;
unsigned long long outof_sequence_pkts;
unsigned long long flush_max_pkts;
unsigned long long sum_avg_pkts_aggregated;
unsigned long long num_aggregations;
} swStat_t;
/* The statistics block of Xena */
@ -680,6 +687,24 @@ struct msix_info_st {
u64 data;
};
/* Data structure to represent a LRO session */
typedef struct lro {
struct sk_buff *parent;
u8 *l2h;
struct iphdr *iph;
struct tcphdr *tcph;
u32 tcp_next_seq;
u32 tcp_ack;
int total_len;
int frags_len;
int sg_num;
int in_use;
u16 window;
u32 cur_tsval;
u32 cur_tsecr;
u8 saw_ts;
}lro_t;
/* Structure representing one instance of the NIC */
struct s2io_nic {
int rxd_mode;
@ -784,6 +809,13 @@ struct s2io_nic {
#define XFRAME_II_DEVICE 2
u8 device_type;
#define MAX_LRO_SESSIONS 32
lro_t lro0_n[MAX_LRO_SESSIONS];
unsigned long clubbed_frms_cnt;
unsigned long sending_both;
u8 lro;
u16 lro_max_aggr_per_sess;
#define INTA 0
#define MSI 1
#define MSI_X 2
@ -937,4 +969,10 @@ static void s2io_card_down(nic_t *nic);
static int s2io_card_up(nic_t *nic);
static int get_xena_rev_id(struct pci_dev *pdev);
static void restore_xmsi_data(nic_t *nic);
static int s2io_club_tcp_session(u8 *buffer, u8 **tcp, u32 *tcp_len, lro_t **lro, RxD_t *rxdp, nic_t *sp);
static void clear_lro_session(lro_t *lro);
static void queue_rx_frame(struct sk_buff *skb);
static void update_L3L4_header(nic_t *sp, lro_t *lro);
static void lro_append_pkt(nic_t *sp, lro_t *lro, struct sk_buff *skb, u32 tcp_len);
#endif /* _S2IO_H */

Write Preview
Loading…
Cancel
Save