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dae5708683
freebsd-dev/sys/dev/sfxge/sfxge_rx.c
Andrew Rybchenko dae5708683 sfxge(4): allow to have no NIC handle on Rx datapath in DPDK PMD 
It is required to minimize RxQ context in the driver or avoid chaising
for the NIC handle in adapter (global per-interface) structure.

Reviewed by:    gnn
Sponsored by:   Solarflare Communications, Inc.
MFC after:      2 days
Differential Revision:  https://reviews.freebsd.org/D8950
2016-12-29 07:00:26 +00:00

1422 lines
36 KiB
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/*-
* Copyright (c) 2010-2016 Solarflare Communications Inc.
* All rights reserved.
*
* This software was developed in part by Philip Paeps under contract for
* Solarflare Communications, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are
* those of the authors and should not be interpreted as representing official
* policies, either expressed or implied, of the FreeBSD Project.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_rss.h"
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/limits.h>
#include <sys/syslog.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_vlan_var.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <machine/in_cksum.h>
#ifdef RSS
#include <net/rss_config.h>
#endif
#include "common/efx.h"
#include "sfxge.h"
#include "sfxge_rx.h"
#define RX_REFILL_THRESHOLD(_entries) (EFX_RXQ_LIMIT(_entries) * 9 / 10)
#ifdef SFXGE_LRO
SYSCTL_NODE(_hw_sfxge, OID_AUTO, lro, CTLFLAG_RD, NULL,
"Large receive offload (LRO) parameters");
#define SFXGE_LRO_PARAM(_param) SFXGE_PARAM(lro._param)
/* Size of the LRO hash table. Must be a power of 2. A larger table
* means we can accelerate a larger number of streams.
*/
static unsigned lro_table_size = 128;
TUNABLE_INT(SFXGE_LRO_PARAM(table_size), &lro_table_size);
SYSCTL_UINT(_hw_sfxge_lro, OID_AUTO, table_size, CTLFLAG_RDTUN,
&lro_table_size, 0,
"Size of the LRO hash table (must be a power of 2)");
/* Maximum length of a hash chain. If chains get too long then the lookup
* time increases and may exceed the benefit of LRO.
*/
static unsigned lro_chain_max = 20;
TUNABLE_INT(SFXGE_LRO_PARAM(chain_max), &lro_chain_max);
SYSCTL_UINT(_hw_sfxge_lro, OID_AUTO, chain_max, CTLFLAG_RDTUN,
&lro_chain_max, 0,
"The maximum length of a hash chain");
/* Maximum time (in ticks) that a connection can be idle before it's LRO
* state is discarded.
*/
static unsigned lro_idle_ticks; /* initialised in sfxge_rx_init() */
TUNABLE_INT(SFXGE_LRO_PARAM(idle_ticks), &lro_idle_ticks);
SYSCTL_UINT(_hw_sfxge_lro, OID_AUTO, idle_ticks, CTLFLAG_RDTUN,
&lro_idle_ticks, 0,
"The maximum time (in ticks) that a connection can be idle "
"before it's LRO state is discarded");
/* Number of packets with payload that must arrive in-order before a
* connection is eligible for LRO. The idea is we should avoid coalescing
* segments when the sender is in slow-start because reducing the ACK rate
* can damage performance.
*/
static int lro_slow_start_packets = 2000;
TUNABLE_INT(SFXGE_LRO_PARAM(slow_start_packets), &lro_slow_start_packets);
SYSCTL_UINT(_hw_sfxge_lro, OID_AUTO, slow_start_packets, CTLFLAG_RDTUN,
&lro_slow_start_packets, 0,
"Number of packets with payload that must arrive in-order before "
"a connection is eligible for LRO");
/* Number of packets with payload that must arrive in-order following loss
* before a connection is eligible for LRO. The idea is we should avoid
* coalescing segments when the sender is recovering from loss, because
* reducing the ACK rate can damage performance.
*/
static int lro_loss_packets = 20;
TUNABLE_INT(SFXGE_LRO_PARAM(loss_packets), &lro_loss_packets);
SYSCTL_UINT(_hw_sfxge_lro, OID_AUTO, loss_packets, CTLFLAG_RDTUN,
&lro_loss_packets, 0,
"Number of packets with payload that must arrive in-order "
"following loss before a connection is eligible for LRO");
/* Flags for sfxge_lro_conn::l2_id; must not collide with EVL_VLID_MASK */
#define SFXGE_LRO_L2_ID_VLAN 0x4000
#define SFXGE_LRO_L2_ID_IPV6 0x8000
#define SFXGE_LRO_CONN_IS_VLAN_ENCAP(c) ((c)->l2_id & SFXGE_LRO_L2_ID_VLAN)
#define SFXGE_LRO_CONN_IS_TCPIPV4(c) (!((c)->l2_id & SFXGE_LRO_L2_ID_IPV6))
/* Compare IPv6 addresses, avoiding conditional branches */
static unsigned long ipv6_addr_cmp(const struct in6_addr *left,
const struct in6_addr *right)
{
#if LONG_BIT == 64
const uint64_t *left64 = (const uint64_t *)left;
const uint64_t *right64 = (const uint64_t *)right;
return (left64[0] - right64[0]) | (left64[1] - right64[1]);
#else
return (left->s6_addr32[0] - right->s6_addr32[0]) |
(left->s6_addr32[1] - right->s6_addr32[1]) |
(left->s6_addr32[2] - right->s6_addr32[2]) |
(left->s6_addr32[3] - right->s6_addr32[3]);
#endif
}
#endif /* SFXGE_LRO */
void
sfxge_rx_qflush_done(struct sfxge_rxq *rxq)
{
rxq->flush_state = SFXGE_FLUSH_DONE;
}
void
sfxge_rx_qflush_failed(struct sfxge_rxq *rxq)
{
rxq->flush_state = SFXGE_FLUSH_FAILED;
}
#ifdef RSS
static uint8_t toep_key[RSS_KEYSIZE];
#else
static uint8_t toep_key[] = {
0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
};
#endif
static void
sfxge_rx_post_refill(void *arg)
{
struct sfxge_rxq *rxq = arg;
struct sfxge_softc *sc;
unsigned int index;
struct sfxge_evq *evq;
uint16_t magic;
sc = rxq->sc;
index = rxq->index;
evq = sc->evq[index];
magic = sfxge_sw_ev_rxq_magic(SFXGE_SW_EV_RX_QREFILL, rxq);
/* This is guaranteed due to the start/stop order of rx and ev */
KASSERT(evq->init_state == SFXGE_EVQ_STARTED,
("evq not started"));
KASSERT(rxq->init_state == SFXGE_RXQ_STARTED,
("rxq not started"));
efx_ev_qpost(evq->common, magic);
}
static void
sfxge_rx_schedule_refill(struct sfxge_rxq *rxq, boolean_t retrying)
{
/* Initially retry after 100 ms, but back off in case of
* repeated failures as we probably have to wait for the
* administrator to raise the pool limit. */
if (retrying)
rxq->refill_delay = min(rxq->refill_delay * 2, 10 * hz);
else
rxq->refill_delay = hz / 10;
callout_reset_curcpu(&rxq->refill_callout, rxq->refill_delay,
sfxge_rx_post_refill, rxq);
}
#define SFXGE_REFILL_BATCH 64
static void
sfxge_rx_qfill(struct sfxge_rxq *rxq, unsigned int target, boolean_t retrying)
{
struct sfxge_softc *sc;
unsigned int index;
struct sfxge_evq *evq;
unsigned int batch;
unsigned int rxfill;
unsigned int mblksize;
int ntodo;
efsys_dma_addr_t addr[SFXGE_REFILL_BATCH];
sc = rxq->sc;
index = rxq->index;
evq = sc->evq[index];
prefetch_read_many(sc->enp);
prefetch_read_many(rxq->common);
SFXGE_EVQ_LOCK_ASSERT_OWNED(evq);
if (__predict_false(rxq->init_state != SFXGE_RXQ_STARTED))
return;
rxfill = rxq->added - rxq->completed;
KASSERT(rxfill <= EFX_RXQ_LIMIT(rxq->entries),
("rxfill > EFX_RXQ_LIMIT(rxq->entries)"));
ntodo = min(EFX_RXQ_LIMIT(rxq->entries) - rxfill, target);
KASSERT(ntodo <= EFX_RXQ_LIMIT(rxq->entries),
("ntodo > EFX_RQX_LIMIT(rxq->entries)"));
if (ntodo == 0)
return;
batch = 0;
mblksize = sc->rx_buffer_size - sc->rx_buffer_align;
while (ntodo-- > 0) {
unsigned int id;
struct sfxge_rx_sw_desc *rx_desc;
bus_dma_segment_t seg;
struct mbuf *m;
id = (rxq->added + batch) & rxq->ptr_mask;
rx_desc = &rxq->queue[id];
KASSERT(rx_desc->mbuf == NULL, ("rx_desc->mbuf != NULL"));
rx_desc->flags = EFX_DISCARD;
m = rx_desc->mbuf = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
sc->rx_cluster_size);
if (m == NULL)
break;
/* m_len specifies length of area to be mapped for DMA */
m->m_len = mblksize;
m->m_data = (caddr_t)P2ROUNDUP((uintptr_t)m->m_data, CACHE_LINE_SIZE);
m->m_data += sc->rx_buffer_align;
sfxge_map_mbuf_fast(rxq->mem.esm_tag, rxq->mem.esm_map, m, &seg);
addr[batch++] = seg.ds_addr;
if (batch == SFXGE_REFILL_BATCH) {
efx_rx_qpost(rxq->common, addr, mblksize, batch,
rxq->completed, rxq->added);
rxq->added += batch;
batch = 0;
}
}
if (ntodo != 0)
sfxge_rx_schedule_refill(rxq, retrying);
if (batch != 0) {
efx_rx_qpost(rxq->common, addr, mblksize, batch,
rxq->completed, rxq->added);
rxq->added += batch;
}
/* Make the descriptors visible to the hardware */
bus_dmamap_sync(rxq->mem.esm_tag, rxq->mem.esm_map,
BUS_DMASYNC_PREWRITE);
efx_rx_qpush(rxq->common, rxq->added, &rxq->pushed);
/* The queue could still be empty if no descriptors were actually
* pushed, in which case there will be no event to cause the next
* refill, so we must schedule a refill ourselves.
*/
if(rxq->pushed == rxq->completed) {
sfxge_rx_schedule_refill(rxq, retrying);
}
}
void
sfxge_rx_qrefill(struct sfxge_rxq *rxq)
{
if (__predict_false(rxq->init_state != SFXGE_RXQ_STARTED))
return;
/* Make sure the queue is full */
sfxge_rx_qfill(rxq, EFX_RXQ_LIMIT(rxq->entries), B_TRUE);
}
static void __sfxge_rx_deliver(struct sfxge_softc *sc, struct mbuf *m)
{
struct ifnet *ifp = sc->ifnet;
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.csum_data = 0xffff;
ifp->if_input(ifp, m);
}
static void
sfxge_rx_deliver(struct sfxge_rxq *rxq, struct sfxge_rx_sw_desc *rx_desc)
{
struct sfxge_softc *sc = rxq->sc;
struct mbuf *m = rx_desc->mbuf;
int flags = rx_desc->flags;
int csum_flags;
/* Convert checksum flags */
csum_flags = (flags & EFX_CKSUM_IPV4) ?
(CSUM_IP_CHECKED | CSUM_IP_VALID) : 0;
if (flags & EFX_CKSUM_TCPUDP)
csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
if (flags & (EFX_PKT_IPV4 | EFX_PKT_IPV6)) {
m->m_pkthdr.flowid =
efx_psuedo_hdr_hash_get(rxq->common,
EFX_RX_HASHALG_TOEPLITZ,
mtod(m, uint8_t *));
/* The hash covers a 4-tuple for TCP only */
M_HASHTYPE_SET(m,
(flags & EFX_PKT_IPV4) ?
((flags & EFX_PKT_TCP) ?
M_HASHTYPE_RSS_TCP_IPV4 : M_HASHTYPE_RSS_IPV4) :
((flags & EFX_PKT_TCP) ?
M_HASHTYPE_RSS_TCP_IPV6 : M_HASHTYPE_RSS_IPV6));
}
m->m_data += sc->rx_prefix_size;
m->m_len = rx_desc->size - sc->rx_prefix_size;
m->m_pkthdr.len = m->m_len;
m->m_pkthdr.csum_flags = csum_flags;
__sfxge_rx_deliver(sc, rx_desc->mbuf);
rx_desc->flags = EFX_DISCARD;
rx_desc->mbuf = NULL;
}
#ifdef SFXGE_LRO
static void
sfxge_lro_deliver(struct sfxge_lro_state *st, struct sfxge_lro_conn *c)
{
struct sfxge_softc *sc = st->sc;
struct mbuf *m = c->mbuf;
struct tcphdr *c_th;
int csum_flags;
KASSERT(m, ("no mbuf to deliver"));
++st->n_bursts;
/* Finish off packet munging and recalculate IP header checksum. */
if (SFXGE_LRO_CONN_IS_TCPIPV4(c)) {
struct ip *iph = c->nh;
iph->ip_len = htons(iph->ip_len);
iph->ip_sum = 0;
iph->ip_sum = in_cksum_hdr(iph);
c_th = (struct tcphdr *)(iph + 1);
csum_flags = (CSUM_DATA_VALID | CSUM_PSEUDO_HDR |
CSUM_IP_CHECKED | CSUM_IP_VALID);
} else {
struct ip6_hdr *iph = c->nh;
iph->ip6_plen = htons(iph->ip6_plen);
c_th = (struct tcphdr *)(iph + 1);
csum_flags = CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
}
c_th->th_win = c->th_last->th_win;
c_th->th_ack = c->th_last->th_ack;
if (c_th->th_off == c->th_last->th_off) {
/* Copy TCP options (take care to avoid going negative). */
int optlen = ((c_th->th_off - 5) & 0xf) << 2u;
memcpy(c_th + 1, c->th_last + 1, optlen);
}
m->m_pkthdr.flowid = c->conn_hash;
M_HASHTYPE_SET(m,
SFXGE_LRO_CONN_IS_TCPIPV4(c) ?
M_HASHTYPE_RSS_TCP_IPV4 : M_HASHTYPE_RSS_TCP_IPV6);
m->m_pkthdr.csum_flags = csum_flags;
__sfxge_rx_deliver(sc, m);
c->mbuf = NULL;
c->delivered = 1;
}
/* Drop the given connection, and add it to the free list. */
static void sfxge_lro_drop(struct sfxge_rxq *rxq, struct sfxge_lro_conn *c)
{
unsigned bucket;
KASSERT(!c->mbuf, ("found orphaned mbuf"));
if (c->next_buf.mbuf != NULL) {
sfxge_rx_deliver(rxq, &c->next_buf);
LIST_REMOVE(c, active_link);
}
bucket = c->conn_hash & rxq->lro.conns_mask;
KASSERT(rxq->lro.conns_n[bucket] > 0, ("LRO: bucket fill level wrong"));
--rxq->lro.conns_n[bucket];
TAILQ_REMOVE(&rxq->lro.conns[bucket], c, link);
TAILQ_INSERT_HEAD(&rxq->lro.free_conns, c, link);
}
/* Stop tracking connections that have gone idle in order to keep hash
* chains short.
*/
static void sfxge_lro_purge_idle(struct sfxge_rxq *rxq, unsigned now)
{
struct sfxge_lro_conn *c;
unsigned i;
KASSERT(LIST_EMPTY(&rxq->lro.active_conns),
("found active connections"));
rxq->lro.last_purge_ticks = now;
for (i = 0; i <= rxq->lro.conns_mask; ++i) {
if (TAILQ_EMPTY(&rxq->lro.conns[i]))
continue;
c = TAILQ_LAST(&rxq->lro.conns[i], sfxge_lro_tailq);
if (now - c->last_pkt_ticks > lro_idle_ticks) {
++rxq->lro.n_drop_idle;
sfxge_lro_drop(rxq, c);
}
}
}
static void
sfxge_lro_merge(struct sfxge_lro_state *st, struct sfxge_lro_conn *c,
struct mbuf *mbuf, struct tcphdr *th)
{
struct tcphdr *c_th;
/* Tack the new mbuf onto the chain. */
KASSERT(!mbuf->m_next, ("mbuf already chained"));
c->mbuf_tail->m_next = mbuf;
c->mbuf_tail = mbuf;
/* Increase length appropriately */
c->mbuf->m_pkthdr.len += mbuf->m_len;
/* Update the connection state flags */
if (SFXGE_LRO_CONN_IS_TCPIPV4(c)) {
struct ip *iph = c->nh;
iph->ip_len += mbuf->m_len;
c_th = (struct tcphdr *)(iph + 1);
} else {
struct ip6_hdr *iph = c->nh;
iph->ip6_plen += mbuf->m_len;
c_th = (struct tcphdr *)(iph + 1);
}
c_th->th_flags |= (th->th_flags & TH_PUSH);
c->th_last = th;
++st->n_merges;
/* Pass packet up now if another segment could overflow the IP
* length.
*/
if (c->mbuf->m_pkthdr.len > 65536 - 9200)
sfxge_lro_deliver(st, c);
}
static void
sfxge_lro_start(struct sfxge_lro_state *st, struct sfxge_lro_conn *c,
struct mbuf *mbuf, void *nh, struct tcphdr *th)
{
/* Start the chain */
c->mbuf = mbuf;
c->mbuf_tail = c->mbuf;
c->nh = nh;
c->th_last = th;
mbuf->m_pkthdr.len = mbuf->m_len;
/* Mangle header fields for later processing */
if (SFXGE_LRO_CONN_IS_TCPIPV4(c)) {
struct ip *iph = nh;
iph->ip_len = ntohs(iph->ip_len);
} else {
struct ip6_hdr *iph = nh;
iph->ip6_plen = ntohs(iph->ip6_plen);
}
}
/* Try to merge or otherwise hold or deliver (as appropriate) the
* packet buffered for this connection (c->next_buf). Return a flag
* indicating whether the connection is still active for LRO purposes.
*/
static int
sfxge_lro_try_merge(struct sfxge_rxq *rxq, struct sfxge_lro_conn *c)
{
struct sfxge_rx_sw_desc *rx_buf = &c->next_buf;
char *eh = c->next_eh;
int data_length, hdr_length, dont_merge;
unsigned th_seq, pkt_length;
struct tcphdr *th;
unsigned now;
if (SFXGE_LRO_CONN_IS_TCPIPV4(c)) {
struct ip *iph = c->next_nh;
th = (struct tcphdr *)(iph + 1);
pkt_length = ntohs(iph->ip_len) + (char *) iph - eh;
} else {
struct ip6_hdr *iph = c->next_nh;
th = (struct tcphdr *)(iph + 1);
pkt_length = ntohs(iph->ip6_plen) + (char *) th - eh;
}
hdr_length = (char *) th + th->th_off * 4 - eh;
data_length = (min(pkt_length, rx_buf->size - rxq->sc->rx_prefix_size) -
hdr_length);
th_seq = ntohl(th->th_seq);
dont_merge = ((data_length <= 0)
| (th->th_flags & (TH_URG | TH_SYN | TH_RST | TH_FIN)));
/* Check for options other than aligned timestamp. */
if (th->th_off != 5) {
const uint32_t *opt_ptr = (const uint32_t *) (th + 1);
if (th->th_off == 8 &&
opt_ptr[0] == ntohl((TCPOPT_NOP << 24) |
(TCPOPT_NOP << 16) |
(TCPOPT_TIMESTAMP << 8) |
TCPOLEN_TIMESTAMP)) {
/* timestamp option -- okay */
} else {
dont_merge = 1;
}
}
if (__predict_false(th_seq != c->next_seq)) {
/* Out-of-order, so start counting again. */
if (c->mbuf != NULL)
sfxge_lro_deliver(&rxq->lro, c);
c->n_in_order_pkts -= lro_loss_packets;
c->next_seq = th_seq + data_length;
++rxq->lro.n_misorder;
goto deliver_buf_out;
}
c->next_seq = th_seq + data_length;
now = ticks;
if (now - c->last_pkt_ticks > lro_idle_ticks) {
++rxq->lro.n_drop_idle;
if (c->mbuf != NULL)
sfxge_lro_deliver(&rxq->lro, c);
sfxge_lro_drop(rxq, c);
return (0);
}
c->last_pkt_ticks = ticks;
if (c->n_in_order_pkts < lro_slow_start_packets) {
/* May be in slow-start, so don't merge. */
++rxq->lro.n_slow_start;
++c->n_in_order_pkts;
goto deliver_buf_out;
}
if (__predict_false(dont_merge)) {
if (c->mbuf != NULL)
sfxge_lro_deliver(&rxq->lro, c);
if (th->th_flags & (TH_FIN | TH_RST)) {
++rxq->lro.n_drop_closed;
sfxge_lro_drop(rxq, c);
return (0);
}
goto deliver_buf_out;
}
rx_buf->mbuf->m_data += rxq->sc->rx_prefix_size;
if (__predict_true(c->mbuf != NULL)) {
/* Remove headers and any padding */
rx_buf->mbuf->m_data += hdr_length;
rx_buf->mbuf->m_len = data_length;
sfxge_lro_merge(&rxq->lro, c, rx_buf->mbuf, th);
} else {
/* Remove any padding */
rx_buf->mbuf->m_len = pkt_length;
sfxge_lro_start(&rxq->lro, c, rx_buf->mbuf, c->next_nh, th);
}
rx_buf->mbuf = NULL;
return (1);
deliver_buf_out:
sfxge_rx_deliver(rxq, rx_buf);
return (1);
}
static void sfxge_lro_new_conn(struct sfxge_lro_state *st, uint32_t conn_hash,
uint16_t l2_id, void *nh, struct tcphdr *th)
{
unsigned bucket = conn_hash & st->conns_mask;
struct sfxge_lro_conn *c;
if (st->conns_n[bucket] >= lro_chain_max) {
++st->n_too_many;
return;
}
if (!TAILQ_EMPTY(&st->free_conns)) {
c = TAILQ_FIRST(&st->free_conns);
TAILQ_REMOVE(&st->free_conns, c, link);
} else {
c = malloc(sizeof(*c), M_SFXGE, M_NOWAIT);
if (c == NULL)
return;
c->mbuf = NULL;
c->next_buf.mbuf = NULL;
}
/* Create the connection tracking data */
++st->conns_n[bucket];
TAILQ_INSERT_HEAD(&st->conns[bucket], c, link);
c->l2_id = l2_id;
c->conn_hash = conn_hash;
c->source = th->th_sport;
c->dest = th->th_dport;
c->n_in_order_pkts = 0;
c->last_pkt_ticks = *(volatile int *)&ticks;
c->delivered = 0;
++st->n_new_stream;
/* NB. We don't initialise c->next_seq, and it doesn't matter what
* value it has. Most likely the next packet received for this
* connection will not match -- no harm done.
*/
}
/* Process mbuf and decide whether to dispatch it to the stack now or
* later.
*/
static void
sfxge_lro(struct sfxge_rxq *rxq, struct sfxge_rx_sw_desc *rx_buf)
{
struct sfxge_softc *sc = rxq->sc;
struct mbuf *m = rx_buf->mbuf;
struct ether_header *eh;
struct sfxge_lro_conn *c;
uint16_t l2_id;
uint16_t l3_proto;
void *nh;
struct tcphdr *th;
uint32_t conn_hash;
unsigned bucket;
/* Get the hardware hash */
conn_hash = efx_psuedo_hdr_hash_get(rxq->common,
EFX_RX_HASHALG_TOEPLITZ,
mtod(m, uint8_t *));
eh = (struct ether_header *)(m->m_data + sc->rx_prefix_size);
if (eh->ether_type == htons(ETHERTYPE_VLAN)) {
struct ether_vlan_header *veh = (struct ether_vlan_header *)eh;
l2_id = EVL_VLANOFTAG(ntohs(veh->evl_tag)) |
SFXGE_LRO_L2_ID_VLAN;
l3_proto = veh->evl_proto;
nh = veh + 1;
} else {
l2_id = 0;
l3_proto = eh->ether_type;
nh = eh + 1;
}
/* Check whether this is a suitable packet (unfragmented
* TCP/IPv4 or TCP/IPv6). If so, find the TCP header and
* length, and compute a hash if necessary. If not, return.
*/
if (l3_proto == htons(ETHERTYPE_IP)) {
struct ip *iph = nh;
KASSERT(iph->ip_p == IPPROTO_TCP,
("IPv4 protocol is not TCP, but packet marker is set"));
if ((iph->ip_hl - (sizeof(*iph) >> 2u)) |
(iph->ip_off & htons(IP_MF | IP_OFFMASK)))
goto deliver_now;
th = (struct tcphdr *)(iph + 1);
} else if (l3_proto == htons(ETHERTYPE_IPV6)) {
struct ip6_hdr *iph = nh;
KASSERT(iph->ip6_nxt == IPPROTO_TCP,
("IPv6 next header is not TCP, but packet marker is set"));
l2_id |= SFXGE_LRO_L2_ID_IPV6;
th = (struct tcphdr *)(iph + 1);
} else {
goto deliver_now;
}
bucket = conn_hash & rxq->lro.conns_mask;
TAILQ_FOREACH(c, &rxq->lro.conns[bucket], link) {
if ((c->l2_id - l2_id) | (c->conn_hash - conn_hash))
continue;
if ((c->source - th->th_sport) | (c->dest - th->th_dport))
continue;
if (c->mbuf != NULL) {
if (SFXGE_LRO_CONN_IS_TCPIPV4(c)) {
struct ip *c_iph, *iph = nh;
c_iph = c->nh;
if ((c_iph->ip_src.s_addr - iph->ip_src.s_addr) |
(c_iph->ip_dst.s_addr - iph->ip_dst.s_addr))
continue;
} else {
struct ip6_hdr *c_iph, *iph = nh;
c_iph = c->nh;
if (ipv6_addr_cmp(&c_iph->ip6_src, &iph->ip6_src) |
ipv6_addr_cmp(&c_iph->ip6_dst, &iph->ip6_dst))
continue;
}
}
/* Re-insert at head of list to reduce lookup time. */
TAILQ_REMOVE(&rxq->lro.conns[bucket], c, link);
TAILQ_INSERT_HEAD(&rxq->lro.conns[bucket], c, link);
if (c->next_buf.mbuf != NULL) {
if (!sfxge_lro_try_merge(rxq, c))
goto deliver_now;
} else {
LIST_INSERT_HEAD(&rxq->lro.active_conns, c,
active_link);
}
c->next_buf = *rx_buf;
c->next_eh = eh;
c->next_nh = nh;
rx_buf->mbuf = NULL;
rx_buf->flags = EFX_DISCARD;
return;
}
sfxge_lro_new_conn(&rxq->lro, conn_hash, l2_id, nh, th);
deliver_now:
sfxge_rx_deliver(rxq, rx_buf);
}
static void sfxge_lro_end_of_burst(struct sfxge_rxq *rxq)
{
struct sfxge_lro_state *st = &rxq->lro;
struct sfxge_lro_conn *c;
unsigned t;
while (!LIST_EMPTY(&st->active_conns)) {
c = LIST_FIRST(&st->active_conns);
if (!c->delivered && c->mbuf != NULL)
sfxge_lro_deliver(st, c);
if (sfxge_lro_try_merge(rxq, c)) {
if (c->mbuf != NULL)
sfxge_lro_deliver(st, c);
LIST_REMOVE(c, active_link);
}
c->delivered = 0;
}
t = *(volatile int *)&ticks;
if (__predict_false(t != st->last_purge_ticks))
sfxge_lro_purge_idle(rxq, t);
}
#else /* !SFXGE_LRO */
static void
sfxge_lro(struct sfxge_rxq *rxq, struct sfxge_rx_sw_desc *rx_buf)
{
}
static void
sfxge_lro_end_of_burst(struct sfxge_rxq *rxq)
{
}
#endif /* SFXGE_LRO */
void
sfxge_rx_qcomplete(struct sfxge_rxq *rxq, boolean_t eop)
{
struct sfxge_softc *sc = rxq->sc;
int if_capenable = sc->ifnet->if_capenable;
int lro_enabled = if_capenable & IFCAP_LRO;
unsigned int index;
struct sfxge_evq *evq;
unsigned int completed;
unsigned int level;
struct mbuf *m;
struct sfxge_rx_sw_desc *prev = NULL;
index = rxq->index;
evq = sc->evq[index];
SFXGE_EVQ_LOCK_ASSERT_OWNED(evq);
completed = rxq->completed;
while (completed != rxq->pending) {
unsigned int id;
struct sfxge_rx_sw_desc *rx_desc;
id = completed++ & rxq->ptr_mask;
rx_desc = &rxq->queue[id];
m = rx_desc->mbuf;
if (__predict_false(rxq->init_state != SFXGE_RXQ_STARTED))
goto discard;
if (rx_desc->flags & (EFX_ADDR_MISMATCH | EFX_DISCARD))
goto discard;
/* Read the length from the pseudo header if required */
if (rx_desc->flags & EFX_PKT_PREFIX_LEN) {
uint16_t tmp_size;
int rc;
rc = efx_psuedo_hdr_pkt_length_get(rxq->common,
mtod(m, uint8_t *),
&tmp_size);
KASSERT(rc == 0, ("cannot get packet length: %d", rc));
rx_desc->size = (int)tmp_size + sc->rx_prefix_size;
}
prefetch_read_many(mtod(m, caddr_t));
switch (rx_desc->flags & (EFX_PKT_IPV4 | EFX_PKT_IPV6)) {
case EFX_PKT_IPV4:
if (~if_capenable & IFCAP_RXCSUM)
rx_desc->flags &=
~(EFX_CKSUM_IPV4 | EFX_CKSUM_TCPUDP);
break;
case EFX_PKT_IPV6:
if (~if_capenable & IFCAP_RXCSUM_IPV6)
rx_desc->flags &= ~EFX_CKSUM_TCPUDP;
break;
case 0:
/* Check for loopback packets */
{
struct ether_header *etherhp;
/*LINTED*/
etherhp = mtod(m, struct ether_header *);
if (etherhp->ether_type ==
htons(SFXGE_ETHERTYPE_LOOPBACK)) {
EFSYS_PROBE(loopback);
rxq->loopback++;
goto discard;
}
}
break;
default:
KASSERT(B_FALSE,
("Rx descriptor with both IPv4 and IPv6 flags"));
goto discard;
}
/* Pass packet up the stack or into LRO (pipelined) */
if (prev != NULL) {
if (lro_enabled &&
((prev->flags & (EFX_PKT_TCP | EFX_CKSUM_TCPUDP)) ==
(EFX_PKT_TCP | EFX_CKSUM_TCPUDP)))
sfxge_lro(rxq, prev);
else
sfxge_rx_deliver(rxq, prev);
}
prev = rx_desc;
continue;
discard:
/* Return the packet to the pool */
m_free(m);
rx_desc->mbuf = NULL;
}
rxq->completed = completed;
level = rxq->added - rxq->completed;
/* Pass last packet up the stack or into LRO */
if (prev != NULL) {
if (lro_enabled &&
((prev->flags & (EFX_PKT_TCP | EFX_CKSUM_TCPUDP)) ==
(EFX_PKT_TCP | EFX_CKSUM_TCPUDP)))
sfxge_lro(rxq, prev);
else
sfxge_rx_deliver(rxq, prev);
}
/*
* If there are any pending flows and this is the end of the
* poll then they must be completed.
*/
if (eop)
sfxge_lro_end_of_burst(rxq);
/* Top up the queue if necessary */
if (level < rxq->refill_threshold)
sfxge_rx_qfill(rxq, EFX_RXQ_LIMIT(rxq->entries), B_FALSE);
}
static void
sfxge_rx_qstop(struct sfxge_softc *sc, unsigned int index)
{
struct sfxge_rxq *rxq;
struct sfxge_evq *evq;
unsigned int count;
unsigned int retry = 3;
SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc);
rxq = sc->rxq[index];
evq = sc->evq[index];
SFXGE_EVQ_LOCK(evq);
KASSERT(rxq->init_state == SFXGE_RXQ_STARTED,
("rxq not started"));
rxq->init_state = SFXGE_RXQ_INITIALIZED;
callout_stop(&rxq->refill_callout);
while (rxq->flush_state != SFXGE_FLUSH_DONE && retry != 0) {
rxq->flush_state = SFXGE_FLUSH_PENDING;
SFXGE_EVQ_UNLOCK(evq);
/* Flush the receive queue */
if (efx_rx_qflush(rxq->common) != 0) {
SFXGE_EVQ_LOCK(evq);
rxq->flush_state = SFXGE_FLUSH_FAILED;
break;
}
count = 0;
do {
/* Spin for 100 ms */
DELAY(100000);
if (rxq->flush_state != SFXGE_FLUSH_PENDING)
break;
} while (++count < 20);
SFXGE_EVQ_LOCK(evq);
if (rxq->flush_state == SFXGE_FLUSH_PENDING) {
/* Flush timeout - neither done nor failed */
log(LOG_ERR, "%s: Cannot flush Rx queue %u\n",
device_get_nameunit(sc->dev), index);
rxq->flush_state = SFXGE_FLUSH_DONE;
}
retry--;
}
if (rxq->flush_state == SFXGE_FLUSH_FAILED) {
log(LOG_ERR, "%s: Flushing Rx queue %u failed\n",
device_get_nameunit(sc->dev), index);
rxq->flush_state = SFXGE_FLUSH_DONE;
}
rxq->pending = rxq->added;
sfxge_rx_qcomplete(rxq, B_TRUE);
KASSERT(rxq->completed == rxq->pending,
("rxq->completed != rxq->pending"));
rxq->added = 0;
rxq->pushed = 0;
rxq->pending = 0;
rxq->completed = 0;
rxq->loopback = 0;
/* Destroy the common code receive queue. */
efx_rx_qdestroy(rxq->common);
efx_sram_buf_tbl_clear(sc->enp, rxq->buf_base_id,
EFX_RXQ_NBUFS(sc->rxq_entries));
SFXGE_EVQ_UNLOCK(evq);
}
static int
sfxge_rx_qstart(struct sfxge_softc *sc, unsigned int index)
{
struct sfxge_rxq *rxq;
efsys_mem_t *esmp;
struct sfxge_evq *evq;
int rc;
SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc);
rxq = sc->rxq[index];
esmp = &rxq->mem;
evq = sc->evq[index];
KASSERT(rxq->init_state == SFXGE_RXQ_INITIALIZED,
("rxq->init_state != SFXGE_RXQ_INITIALIZED"));
KASSERT(evq->init_state == SFXGE_EVQ_STARTED,
("evq->init_state != SFXGE_EVQ_STARTED"));
/* Program the buffer table. */
if ((rc = efx_sram_buf_tbl_set(sc->enp, rxq->buf_base_id, esmp,
EFX_RXQ_NBUFS(sc->rxq_entries))) != 0)
return (rc);
/* Create the common code receive queue. */
if ((rc = efx_rx_qcreate(sc->enp, index, 0, EFX_RXQ_TYPE_DEFAULT,
esmp, sc->rxq_entries, rxq->buf_base_id, evq->common,
&rxq->common)) != 0)
goto fail;
SFXGE_EVQ_LOCK(evq);
/* Enable the receive queue. */
efx_rx_qenable(rxq->common);
rxq->init_state = SFXGE_RXQ_STARTED;
rxq->flush_state = SFXGE_FLUSH_REQUIRED;
/* Try to fill the queue from the pool. */
sfxge_rx_qfill(rxq, EFX_RXQ_LIMIT(sc->rxq_entries), B_FALSE);
SFXGE_EVQ_UNLOCK(evq);
return (0);
fail:
efx_sram_buf_tbl_clear(sc->enp, rxq->buf_base_id,
EFX_RXQ_NBUFS(sc->rxq_entries));
return (rc);
}
void
sfxge_rx_stop(struct sfxge_softc *sc)
{
int index;
efx_mac_filter_default_rxq_clear(sc->enp);
/* Stop the receive queue(s) */
index = sc->rxq_count;
while (--index >= 0)
sfxge_rx_qstop(sc, index);
sc->rx_prefix_size = 0;
sc->rx_buffer_size = 0;
efx_rx_fini(sc->enp);
}
int
sfxge_rx_start(struct sfxge_softc *sc)
{
struct sfxge_intr *intr;
const efx_nic_cfg_t *encp;
size_t hdrlen, align, reserved;
int index;
int rc;
intr = &sc->intr;
/* Initialize the common code receive module. */
if ((rc = efx_rx_init(sc->enp)) != 0)
return (rc);
encp = efx_nic_cfg_get(sc->enp);
sc->rx_buffer_size = EFX_MAC_PDU(sc->ifnet->if_mtu);
/* Calculate the receive packet buffer size. */
sc->rx_prefix_size = encp->enc_rx_prefix_size;
/* Ensure IP headers are 32bit aligned */
hdrlen = sc->rx_prefix_size + sizeof (struct ether_header);
sc->rx_buffer_align = P2ROUNDUP(hdrlen, 4) - hdrlen;
sc->rx_buffer_size += sc->rx_buffer_align;
/* Align end of packet buffer for RX DMA end padding */
align = MAX(1, encp->enc_rx_buf_align_end);
EFSYS_ASSERT(ISP2(align));
sc->rx_buffer_size = P2ROUNDUP(sc->rx_buffer_size, align);
/*
* Standard mbuf zones only guarantee pointer-size alignment;
* we need extra space to align to the cache line
*/
reserved = sc->rx_buffer_size + CACHE_LINE_SIZE;
/* Select zone for packet buffers */
if (reserved <= MCLBYTES)
sc->rx_cluster_size = MCLBYTES;
else if (reserved <= MJUMPAGESIZE)
sc->rx_cluster_size = MJUMPAGESIZE;
else if (reserved <= MJUM9BYTES)
sc->rx_cluster_size = MJUM9BYTES;
else
sc->rx_cluster_size = MJUM16BYTES;
/*
* Set up the scale table. Enable all hash types and hash insertion.
*/
for (index = 0; index < nitems(sc->rx_indir_table); index++)
#ifdef RSS
sc->rx_indir_table[index] =
rss_get_indirection_to_bucket(index) % sc->rxq_count;
#else
sc->rx_indir_table[index] = index % sc->rxq_count;
#endif
if ((rc = efx_rx_scale_tbl_set(sc->enp, sc->rx_indir_table,
nitems(sc->rx_indir_table))) != 0)
goto fail;
(void)efx_rx_scale_mode_set(sc->enp, EFX_RX_HASHALG_TOEPLITZ,
(1 << EFX_RX_HASH_IPV4) | (1 << EFX_RX_HASH_TCPIPV4) |
(1 << EFX_RX_HASH_IPV6) | (1 << EFX_RX_HASH_TCPIPV6), B_TRUE);
#ifdef RSS
rss_getkey(toep_key);
#endif
if ((rc = efx_rx_scale_key_set(sc->enp, toep_key,
sizeof(toep_key))) != 0)
goto fail;
/* Start the receive queue(s). */
for (index = 0; index < sc->rxq_count; index++) {
if ((rc = sfxge_rx_qstart(sc, index)) != 0)
goto fail2;
}
rc = efx_mac_filter_default_rxq_set(sc->enp, sc->rxq[0]->common,
sc->intr.n_alloc > 1);
if (rc != 0)
goto fail3;
return (0);
fail3:
fail2:
while (--index >= 0)
sfxge_rx_qstop(sc, index);
fail:
efx_rx_fini(sc->enp);
return (rc);
}
#ifdef SFXGE_LRO
static void sfxge_lro_init(struct sfxge_rxq *rxq)
{
struct sfxge_lro_state *st = &rxq->lro;
unsigned i;
st->conns_mask = lro_table_size - 1;
KASSERT(!((st->conns_mask + 1) & st->conns_mask),
("lro_table_size must be a power of 2"));
st->sc = rxq->sc;
st->conns = malloc((st->conns_mask + 1) * sizeof(st->conns[0]),
M_SFXGE, M_WAITOK);
st->conns_n = malloc((st->conns_mask + 1) * sizeof(st->conns_n[0]),
M_SFXGE, M_WAITOK);
for (i = 0; i <= st->conns_mask; ++i) {
TAILQ_INIT(&st->conns[i]);
st->conns_n[i] = 0;
}
LIST_INIT(&st->active_conns);
TAILQ_INIT(&st->free_conns);
}
static void sfxge_lro_fini(struct sfxge_rxq *rxq)
{
struct sfxge_lro_state *st = &rxq->lro;
struct sfxge_lro_conn *c;
unsigned i;
/* Return cleanly if sfxge_lro_init() has not been called. */
if (st->conns == NULL)
return;
KASSERT(LIST_EMPTY(&st->active_conns), ("found active connections"));
for (i = 0; i <= st->conns_mask; ++i) {
while (!TAILQ_EMPTY(&st->conns[i])) {
c = TAILQ_LAST(&st->conns[i], sfxge_lro_tailq);
sfxge_lro_drop(rxq, c);
}
}
while (!TAILQ_EMPTY(&st->free_conns)) {
c = TAILQ_FIRST(&st->free_conns);
TAILQ_REMOVE(&st->free_conns, c, link);
KASSERT(!c->mbuf, ("found orphaned mbuf"));
free(c, M_SFXGE);
}
free(st->conns_n, M_SFXGE);
free(st->conns, M_SFXGE);
st->conns = NULL;
}
#else
static void
sfxge_lro_init(struct sfxge_rxq *rxq)
{
}
static void
sfxge_lro_fini(struct sfxge_rxq *rxq)
{
}
#endif /* SFXGE_LRO */
static void
sfxge_rx_qfini(struct sfxge_softc *sc, unsigned int index)
{
struct sfxge_rxq *rxq;
rxq = sc->rxq[index];
KASSERT(rxq->init_state == SFXGE_RXQ_INITIALIZED,
("rxq->init_state != SFXGE_RXQ_INITIALIZED"));
/* Free the context array and the flow table. */
free(rxq->queue, M_SFXGE);
sfxge_lro_fini(rxq);
/* Release DMA memory. */
sfxge_dma_free(&rxq->mem);
sc->rxq[index] = NULL;
free(rxq, M_SFXGE);
}
static int
sfxge_rx_qinit(struct sfxge_softc *sc, unsigned int index)
{
struct sfxge_rxq *rxq;
struct sfxge_evq *evq;
efsys_mem_t *esmp;
int rc;
KASSERT(index < sc->rxq_count, ("index >= %d", sc->rxq_count));
rxq = malloc(sizeof(struct sfxge_rxq), M_SFXGE, M_ZERO | M_WAITOK);
rxq->sc = sc;
rxq->index = index;
rxq->entries = sc->rxq_entries;
rxq->ptr_mask = rxq->entries - 1;
rxq->refill_threshold = RX_REFILL_THRESHOLD(rxq->entries);
sc->rxq[index] = rxq;
esmp = &rxq->mem;
evq = sc->evq[index];
/* Allocate and zero DMA space. */
if ((rc = sfxge_dma_alloc(sc, EFX_RXQ_SIZE(sc->rxq_entries), esmp)) != 0)
return (rc);
/* Allocate buffer table entries. */
sfxge_sram_buf_tbl_alloc(sc, EFX_RXQ_NBUFS(sc->rxq_entries),
&rxq->buf_base_id);
/* Allocate the context array and the flow table. */
rxq->queue = malloc(sizeof(struct sfxge_rx_sw_desc) * sc->rxq_entries,
M_SFXGE, M_WAITOK | M_ZERO);
sfxge_lro_init(rxq);
callout_init(&rxq->refill_callout, 1);
rxq->init_state = SFXGE_RXQ_INITIALIZED;
return (0);
}
static const struct {
const char *name;
size_t offset;
} sfxge_rx_stats[] = {
#define SFXGE_RX_STAT(name, member) \
{ #name, offsetof(struct sfxge_rxq, member) }
#ifdef SFXGE_LRO
SFXGE_RX_STAT(lro_merges, lro.n_merges),
SFXGE_RX_STAT(lro_bursts, lro.n_bursts),
SFXGE_RX_STAT(lro_slow_start, lro.n_slow_start),
SFXGE_RX_STAT(lro_misorder, lro.n_misorder),
SFXGE_RX_STAT(lro_too_many, lro.n_too_many),
SFXGE_RX_STAT(lro_new_stream, lro.n_new_stream),
SFXGE_RX_STAT(lro_drop_idle, lro.n_drop_idle),
SFXGE_RX_STAT(lro_drop_closed, lro.n_drop_closed)
#endif
};
static int
sfxge_rx_stat_handler(SYSCTL_HANDLER_ARGS)
{
struct sfxge_softc *sc = arg1;
unsigned int id = arg2;
unsigned int sum, index;
/* Sum across all RX queues */
sum = 0;
for (index = 0; index < sc->rxq_count; index++)
sum += *(unsigned int *)((caddr_t)sc->rxq[index] +
sfxge_rx_stats[id].offset);
return (SYSCTL_OUT(req, &sum, sizeof(sum)));
}
static void
sfxge_rx_stat_init(struct sfxge_softc *sc)
{
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev);
struct sysctl_oid_list *stat_list;
unsigned int id;
stat_list = SYSCTL_CHILDREN(sc->stats_node);
for (id = 0; id < nitems(sfxge_rx_stats); id++) {
SYSCTL_ADD_PROC(
ctx, stat_list,
OID_AUTO, sfxge_rx_stats[id].name,
CTLTYPE_UINT|CTLFLAG_RD,
sc, id, sfxge_rx_stat_handler, "IU",
"");
}
}
void
sfxge_rx_fini(struct sfxge_softc *sc)
{
int index;
index = sc->rxq_count;
while (--index >= 0)
sfxge_rx_qfini(sc, index);
sc->rxq_count = 0;
}
int
sfxge_rx_init(struct sfxge_softc *sc)
{
struct sfxge_intr *intr;
int index;
int rc;
#ifdef SFXGE_LRO
if (!ISP2(lro_table_size)) {
log(LOG_ERR, "%s=%u must be power of 2",
SFXGE_LRO_PARAM(table_size), lro_table_size);
rc = EINVAL;
goto fail_lro_table_size;
}
if (lro_idle_ticks == 0)
lro_idle_ticks = hz / 10 + 1; /* 100 ms */
#endif
intr = &sc->intr;
sc->rxq_count = intr->n_alloc;
KASSERT(intr->state == SFXGE_INTR_INITIALIZED,
("intr->state != SFXGE_INTR_INITIALIZED"));
/* Initialize the receive queue(s) - one per interrupt. */
for (index = 0; index < sc->rxq_count; index++) {
if ((rc = sfxge_rx_qinit(sc, index)) != 0)
goto fail;
}
sfxge_rx_stat_init(sc);
return (0);
fail:
/* Tear down the receive queue(s). */
while (--index >= 0)
sfxge_rx_qfini(sc, index);
sc->rxq_count = 0;
#ifdef SFXGE_LRO
fail_lro_table_size:
#endif
return (rc);
}
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