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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/xl/@/dev/sfxge/sfxge_ev.c |
/*-
* Copyright (c) 2010-2011 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 AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/sfxge/sfxge_ev.c 227569 2011-11-16 17:11:13Z philip $");
#include <sys/param.h>
#include <sys/systm.h>
#include "common/efx.h"
#include "sfxge.h"
static void
sfxge_ev_qcomplete(struct sfxge_evq *evq, boolean_t eop)
{
struct sfxge_softc *sc;
unsigned int index;
struct sfxge_rxq *rxq;
struct sfxge_txq *txq;
sc = evq->sc;
index = evq->index;
rxq = sc->rxq[index];
if ((txq = evq->txq) != NULL) {
evq->txq = NULL;
evq->txqs = &(evq->txq);
do {
struct sfxge_txq *next;
next = txq->next;
txq->next = NULL;
KASSERT(txq->evq_index == index,
("txq->evq_index != index"));
if (txq->pending != txq->completed)
sfxge_tx_qcomplete(txq);
txq = next;
} while (txq != NULL);
}
if (rxq->pending != rxq->completed)
sfxge_rx_qcomplete(rxq, eop);
}
static boolean_t
sfxge_ev_rx(void *arg, uint32_t label, uint32_t id, uint32_t size,
uint16_t flags)
{
struct sfxge_evq *evq;
struct sfxge_softc *sc;
struct sfxge_rxq *rxq;
unsigned int expected;
struct sfxge_rx_sw_desc *rx_desc;
evq = arg;
sc = evq->sc;
if (evq->exception)
goto done;
rxq = sc->rxq[label];
KASSERT(rxq != NULL, ("rxq == NULL"));
KASSERT(evq->index == rxq->index,
("evq->index != rxq->index"));
if (rxq->init_state != SFXGE_RXQ_STARTED)
goto done;
expected = rxq->pending++ & (SFXGE_NDESCS - 1);
if (id != expected) {
evq->exception = B_TRUE;
device_printf(sc->dev, "RX completion out of order"
" (id=%#x expected=%#x flags=%#x); resetting\n",
id, expected, flags);
sfxge_schedule_reset(sc);
goto done;
}
rx_desc = &rxq->queue[id];
KASSERT(rx_desc->flags == EFX_DISCARD,
("rx_desc->flags != EFX_DISCARD"));
rx_desc->flags = flags;
KASSERT(size < (1 << 16), ("size > (1 << 16)"));
rx_desc->size = (uint16_t)size;
prefetch_read_many(rx_desc->mbuf);
evq->rx_done++;
if (rxq->pending - rxq->completed >= SFXGE_RX_BATCH)
sfxge_ev_qcomplete(evq, B_FALSE);
done:
return (evq->rx_done >= SFXGE_EV_BATCH);
}
static boolean_t
sfxge_ev_exception(void *arg, uint32_t code, uint32_t data)
{
struct sfxge_evq *evq;
struct sfxge_softc *sc;
evq = (struct sfxge_evq *)arg;
sc = evq->sc;
evq->exception = B_TRUE;
if (code != EFX_EXCEPTION_UNKNOWN_SENSOREVT) {
device_printf(sc->dev,
"hardware exception (code=%u); resetting\n",
code);
sfxge_schedule_reset(sc);
}
return (B_FALSE);
}
static boolean_t
sfxge_ev_rxq_flush_done(void *arg, uint32_t label)
{
struct sfxge_evq *evq;
struct sfxge_softc *sc;
struct sfxge_rxq *rxq;
unsigned int index;
uint16_t magic;
evq = (struct sfxge_evq *)arg;
sc = evq->sc;
rxq = sc->rxq[label];
KASSERT(rxq != NULL, ("rxq == NULL"));
/* Resend a software event on the correct queue */
index = rxq->index;
evq = sc->evq[index];
KASSERT((label & SFXGE_MAGIC_DMAQ_LABEL_MASK) == label,
("(label & SFXGE_MAGIC_DMAQ_LABEL_MASK) != level"));
magic = SFXGE_MAGIC_RX_QFLUSH_DONE | label;
KASSERT(evq->init_state == SFXGE_EVQ_STARTED,
("evq not started"));
efx_ev_qpost(evq->common, magic);
return (B_FALSE);
}
static boolean_t
sfxge_ev_rxq_flush_failed(void *arg, uint32_t label)
{
struct sfxge_evq *evq;
struct sfxge_softc *sc;
struct sfxge_rxq *rxq;
unsigned int index;
uint16_t magic;
evq = (struct sfxge_evq *)arg;
sc = evq->sc;
rxq = sc->rxq[label];
KASSERT(rxq != NULL, ("rxq == NULL"));
/* Resend a software event on the correct queue */
index = rxq->index;
evq = sc->evq[index];
KASSERT((label & SFXGE_MAGIC_DMAQ_LABEL_MASK) == label,
("(label & SFXGE_MAGIC_DMAQ_LABEL_MASK) != label"));
magic = SFXGE_MAGIC_RX_QFLUSH_FAILED | label;
KASSERT(evq->init_state == SFXGE_EVQ_STARTED,
("evq not started"));
efx_ev_qpost(evq->common, magic);
return (B_FALSE);
}
static boolean_t
sfxge_ev_tx(void *arg, uint32_t label, uint32_t id)
{
struct sfxge_evq *evq;
struct sfxge_softc *sc;
struct sfxge_txq *txq;
unsigned int stop;
unsigned int delta;
evq = (struct sfxge_evq *)arg;
sc = evq->sc;
txq = sc->txq[label];
KASSERT(txq != NULL, ("txq == NULL"));
KASSERT(evq->index == txq->evq_index,
("evq->index != txq->evq_index"));
if (txq->init_state != SFXGE_TXQ_STARTED)
goto done;
stop = (id + 1) & (SFXGE_NDESCS - 1);
id = txq->pending & (SFXGE_NDESCS - 1);
delta = (stop >= id) ? (stop - id) : (SFXGE_NDESCS - id + stop);
txq->pending += delta;
evq->tx_done++;
if (txq->next == NULL &&
evq->txqs != &(txq->next)) {
*(evq->txqs) = txq;
evq->txqs = &(txq->next);
}
if (txq->pending - txq->completed >= SFXGE_TX_BATCH)
sfxge_tx_qcomplete(txq);
done:
return (evq->tx_done >= SFXGE_EV_BATCH);
}
static boolean_t
sfxge_ev_txq_flush_done(void *arg, uint32_t label)
{
struct sfxge_evq *evq;
struct sfxge_softc *sc;
struct sfxge_txq *txq;
uint16_t magic;
evq = (struct sfxge_evq *)arg;
sc = evq->sc;
txq = sc->txq[label];
KASSERT(txq != NULL, ("txq == NULL"));
KASSERT(txq->init_state == SFXGE_TXQ_INITIALIZED,
("txq not initialized"));
/* Resend a software event on the correct queue */
evq = sc->evq[txq->evq_index];
KASSERT((label & SFXGE_MAGIC_DMAQ_LABEL_MASK) == label,
("(label & SFXGE_MAGIC_DMAQ_LABEL_MASK) != label"));
magic = SFXGE_MAGIC_TX_QFLUSH_DONE | label;
KASSERT(evq->init_state == SFXGE_EVQ_STARTED,
("evq not started"));
efx_ev_qpost(evq->common, magic);
return (B_FALSE);
}
static boolean_t
sfxge_ev_software(void *arg, uint16_t magic)
{
struct sfxge_evq *evq;
struct sfxge_softc *sc;
unsigned int label;
evq = (struct sfxge_evq *)arg;
sc = evq->sc;
label = magic & SFXGE_MAGIC_DMAQ_LABEL_MASK;
magic &= ~SFXGE_MAGIC_DMAQ_LABEL_MASK;
switch (magic) {
case SFXGE_MAGIC_RX_QFLUSH_DONE: {
struct sfxge_rxq *rxq = sc->rxq[label];
KASSERT(rxq != NULL, ("rxq == NULL"));
KASSERT(evq->index == rxq->index,
("evq->index != rxq->index"));
sfxge_rx_qflush_done(rxq);
break;
}
case SFXGE_MAGIC_RX_QFLUSH_FAILED: {
struct sfxge_rxq *rxq = sc->rxq[label];
KASSERT(rxq != NULL, ("rxq == NULL"));
KASSERT(evq->index == rxq->index,
("evq->index != rxq->index"));
sfxge_rx_qflush_failed(rxq);
break;
}
case SFXGE_MAGIC_RX_QREFILL: {
struct sfxge_rxq *rxq = sc->rxq[label];
KASSERT(rxq != NULL, ("rxq == NULL"));
KASSERT(evq->index == rxq->index,
("evq->index != rxq->index"));
sfxge_rx_qrefill(rxq);
break;
}
case SFXGE_MAGIC_TX_QFLUSH_DONE: {
struct sfxge_txq *txq = sc->txq[label];
KASSERT(txq != NULL, ("txq == NULL"));
KASSERT(evq->index == txq->evq_index,
("evq->index != txq->evq_index"));
sfxge_tx_qflush_done(txq);
break;
}
default:
break;
}
return (B_FALSE);
}
static boolean_t
sfxge_ev_sram(void *arg, uint32_t code)
{
(void)arg;
(void)code;
switch (code) {
case EFX_SRAM_UPDATE:
EFSYS_PROBE(sram_update);
break;
case EFX_SRAM_CLEAR:
EFSYS_PROBE(sram_clear);
break;
case EFX_SRAM_ILLEGAL_CLEAR:
EFSYS_PROBE(sram_illegal_clear);
break;
default:
KASSERT(B_FALSE, ("Impossible SRAM event"));
break;
}
return (B_FALSE);
}
static boolean_t
sfxge_ev_timer(void *arg, uint32_t index)
{
(void)arg;
(void)index;
return (B_FALSE);
}
static boolean_t
sfxge_ev_wake_up(void *arg, uint32_t index)
{
(void)arg;
(void)index;
return (B_FALSE);
}
static void
sfxge_ev_stat_update(struct sfxge_softc *sc)
{
struct sfxge_evq *evq;
unsigned int index;
clock_t now;
sx_xlock(&sc->softc_lock);
if (sc->evq[0]->init_state != SFXGE_EVQ_STARTED)
goto out;
now = ticks;
if (now - sc->ev_stats_update_time < hz)
goto out;
sc->ev_stats_update_time = now;
/* Add event counts from each event queue in turn */
for (index = 0; index < sc->intr.n_alloc; index++) {
evq = sc->evq[index];
mtx_lock(&evq->lock);
efx_ev_qstats_update(evq->common, sc->ev_stats);
mtx_unlock(&evq->lock);
}
out:
sx_xunlock(&sc->softc_lock);
}
static int
sfxge_ev_stat_handler(SYSCTL_HANDLER_ARGS)
{
struct sfxge_softc *sc = arg1;
unsigned int id = arg2;
sfxge_ev_stat_update(sc);
return SYSCTL_OUT(req, &sc->ev_stats[id], sizeof(sc->ev_stats[id]));
}
static void
sfxge_ev_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;
char name[40];
stat_list = SYSCTL_CHILDREN(sc->stats_node);
for (id = 0; id < EV_NQSTATS; id++) {
snprintf(name, sizeof(name), "ev_%s",
efx_ev_qstat_name(sc->enp, id));
SYSCTL_ADD_PROC(
ctx, stat_list,
OID_AUTO, name, CTLTYPE_U64|CTLFLAG_RD,
sc, id, sfxge_ev_stat_handler, "Q",
"");
}
}
static void
sfxge_ev_qmoderate(struct sfxge_softc *sc, unsigned int idx, unsigned int us)
{
struct sfxge_evq *evq;
efx_evq_t *eep;
evq = sc->evq[idx];
eep = evq->common;
KASSERT(evq->init_state == SFXGE_EVQ_STARTED,
("evq->init_state != SFXGE_EVQ_STARTED"));
(void)efx_ev_qmoderate(eep, us);
}
static int
sfxge_int_mod_handler(SYSCTL_HANDLER_ARGS)
{
struct sfxge_softc *sc = arg1;
struct sfxge_intr *intr = &sc->intr;
unsigned int moderation;
int error;
int index;
sx_xlock(&sc->softc_lock);
if (req->newptr) {
if ((error = SYSCTL_IN(req, &moderation, sizeof(moderation)))
!= 0)
goto out;
/* We may not be calling efx_ev_qmoderate() now,
* so we have to range-check the value ourselves.
*/
if (moderation >
efx_nic_cfg_get(sc->enp)->enc_evq_moderation_max) {
error = EINVAL;
goto out;
}
sc->ev_moderation = moderation;
if (intr->state == SFXGE_INTR_STARTED) {
for (index = 0; index < intr->n_alloc; index++)
sfxge_ev_qmoderate(sc, index, moderation);
}
} else {
error = SYSCTL_OUT(req, &sc->ev_moderation,
sizeof(sc->ev_moderation));
}
out:
sx_xunlock(&sc->softc_lock);
return error;
}
static boolean_t
sfxge_ev_initialized(void *arg)
{
struct sfxge_evq *evq;
evq = (struct sfxge_evq *)arg;
KASSERT(evq->init_state == SFXGE_EVQ_STARTING,
("evq not starting"));
evq->init_state = SFXGE_EVQ_STARTED;
return (0);
}
static boolean_t
sfxge_ev_link_change(void *arg, efx_link_mode_t link_mode)
{
struct sfxge_evq *evq;
struct sfxge_softc *sc;
evq = (struct sfxge_evq *)arg;
sc = evq->sc;
sfxge_mac_link_update(sc, link_mode);
return (0);
}
static const efx_ev_callbacks_t sfxge_ev_callbacks = {
.eec_initialized = sfxge_ev_initialized,
.eec_rx = sfxge_ev_rx,
.eec_tx = sfxge_ev_tx,
.eec_exception = sfxge_ev_exception,
.eec_rxq_flush_done = sfxge_ev_rxq_flush_done,
.eec_rxq_flush_failed = sfxge_ev_rxq_flush_failed,
.eec_txq_flush_done = sfxge_ev_txq_flush_done,
.eec_software = sfxge_ev_software,
.eec_sram = sfxge_ev_sram,
.eec_wake_up = sfxge_ev_wake_up,
.eec_timer = sfxge_ev_timer,
.eec_link_change = sfxge_ev_link_change,
};
int
sfxge_ev_qpoll(struct sfxge_softc *sc, unsigned int index)
{
struct sfxge_evq *evq;
int rc;
evq = sc->evq[index];
mtx_lock(&evq->lock);
if (evq->init_state != SFXGE_EVQ_STARTING &&
evq->init_state != SFXGE_EVQ_STARTED) {
rc = EINVAL;
goto fail;
}
/* Synchronize the DMA memory for reading */
bus_dmamap_sync(evq->mem.esm_tag, evq->mem.esm_map,
BUS_DMASYNC_POSTREAD);
KASSERT(evq->rx_done == 0, ("evq->rx_done != 0"));
KASSERT(evq->tx_done == 0, ("evq->tx_done != 0"));
KASSERT(evq->txq == NULL, ("evq->txq != NULL"));
KASSERT(evq->txqs == &evq->txq, ("evq->txqs != &evq->txq"));
/* Poll the queue */
efx_ev_qpoll(evq->common, &evq->read_ptr, &sfxge_ev_callbacks, evq);
evq->rx_done = 0;
evq->tx_done = 0;
/* Perform any pending completion processing */
sfxge_ev_qcomplete(evq, B_TRUE);
/* Re-prime the event queue for interrupts */
if ((rc = efx_ev_qprime(evq->common, evq->read_ptr)) != 0)
goto fail;
mtx_unlock(&evq->lock);
return (0);
fail:
mtx_unlock(&(evq->lock));
return (rc);
}
static void
sfxge_ev_qstop(struct sfxge_softc *sc, unsigned int index)
{
struct sfxge_evq *evq;
evq = sc->evq[index];
KASSERT(evq->init_state == SFXGE_EVQ_STARTED,
("evq->init_state != SFXGE_EVQ_STARTED"));
mtx_lock(&evq->lock);
evq->init_state = SFXGE_EVQ_INITIALIZED;
evq->read_ptr = 0;
evq->exception = B_FALSE;
/* Add event counts before discarding the common evq state */
efx_ev_qstats_update(evq->common, sc->ev_stats);
efx_ev_qdestroy(evq->common);
efx_sram_buf_tbl_clear(sc->enp, evq->buf_base_id,
EFX_EVQ_NBUFS(SFXGE_NEVS));
mtx_unlock(&evq->lock);
}
static int
sfxge_ev_qstart(struct sfxge_softc *sc, unsigned int index)
{
struct sfxge_evq *evq;
efsys_mem_t *esmp;
int count;
int rc;
evq = sc->evq[index];
esmp = &evq->mem;
KASSERT(evq->init_state == SFXGE_EVQ_INITIALIZED,
("evq->init_state != SFXGE_EVQ_INITIALIZED"));
/* Clear all events. */
(void)memset(esmp->esm_base, 0xff, EFX_EVQ_SIZE(SFXGE_NEVS));
/* Program the buffer table. */
if ((rc = efx_sram_buf_tbl_set(sc->enp, evq->buf_base_id, esmp,
EFX_EVQ_NBUFS(SFXGE_NEVS))) != 0)
return rc;
/* Create the common code event queue. */
if ((rc = efx_ev_qcreate(sc->enp, index, esmp, SFXGE_NEVS,
evq->buf_base_id, &evq->common)) != 0)
goto fail;
mtx_lock(&evq->lock);
/* Set the default moderation */
(void)efx_ev_qmoderate(evq->common, sc->ev_moderation);
/* Prime the event queue for interrupts */
if ((rc = efx_ev_qprime(evq->common, evq->read_ptr)) != 0)
goto fail2;
evq->init_state = SFXGE_EVQ_STARTING;
mtx_unlock(&evq->lock);
/* Wait for the initialization event */
count = 0;
do {
/* Pause for 100 ms */
pause("sfxge evq init", hz / 10);
/* Check to see if the test event has been processed */
if (evq->init_state == SFXGE_EVQ_STARTED)
goto done;
} while (++count < 20);
rc = ETIMEDOUT;
goto fail3;
done:
return (0);
fail3:
mtx_lock(&evq->lock);
evq->init_state = SFXGE_EVQ_INITIALIZED;
fail2:
mtx_unlock(&evq->lock);
efx_ev_qdestroy(evq->common);
fail:
efx_sram_buf_tbl_clear(sc->enp, evq->buf_base_id,
EFX_EVQ_NBUFS(SFXGE_NEVS));
return (rc);
}
void
sfxge_ev_stop(struct sfxge_softc *sc)
{
struct sfxge_intr *intr;
efx_nic_t *enp;
int index;
intr = &sc->intr;
enp = sc->enp;
KASSERT(intr->state == SFXGE_INTR_STARTED,
("Interrupts not started"));
/* Stop the event queue(s) */
index = intr->n_alloc;
while (--index >= 0)
sfxge_ev_qstop(sc, index);
/* Tear down the event module */
efx_ev_fini(enp);
}
int
sfxge_ev_start(struct sfxge_softc *sc)
{
struct sfxge_intr *intr;
int index;
int rc;
intr = &sc->intr;
KASSERT(intr->state == SFXGE_INTR_STARTED,
("intr->state != SFXGE_INTR_STARTED"));
/* Initialize the event module */
if ((rc = efx_ev_init(sc->enp)) != 0)
return rc;
/* Start the event queues */
for (index = 0; index < intr->n_alloc; index++) {
if ((rc = sfxge_ev_qstart(sc, index)) != 0)
goto fail;
}
return (0);
fail:
/* Stop the event queue(s) */
while (--index >= 0)
sfxge_ev_qstop(sc, index);
/* Tear down the event module */
efx_ev_fini(sc->enp);
return (rc);
}
static void
sfxge_ev_qfini(struct sfxge_softc *sc, unsigned int index)
{
struct sfxge_evq *evq;
evq = sc->evq[index];
KASSERT(evq->init_state == SFXGE_EVQ_INITIALIZED,
("evq->init_state != SFXGE_EVQ_INITIALIZED"));
KASSERT(evq->txqs == &evq->txq, ("evq->txqs != &evq->txq"));
sfxge_dma_free(&evq->mem);
sc->evq[index] = NULL;
mtx_destroy(&evq->lock);
free(evq, M_SFXGE);
}
static int
sfxge_ev_qinit(struct sfxge_softc *sc, unsigned int index)
{
struct sfxge_evq *evq;
efsys_mem_t *esmp;
int rc;
KASSERT(index < SFXGE_RX_SCALE_MAX, ("index >= SFXGE_RX_SCALE_MAX"));
evq = malloc(sizeof(struct sfxge_evq), M_SFXGE, M_ZERO | M_WAITOK);
evq->sc = sc;
evq->index = index;
sc->evq[index] = evq;
esmp = &evq->mem;
/* Initialise TX completion list */
evq->txqs = &evq->txq;
/* Allocate DMA space. */
if ((rc = sfxge_dma_alloc(sc, EFX_EVQ_SIZE(SFXGE_NEVS), esmp)) != 0)
return (rc);
/* Allocate buffer table entries. */
sfxge_sram_buf_tbl_alloc(sc, EFX_EVQ_NBUFS(SFXGE_NEVS),
&evq->buf_base_id);
mtx_init(&evq->lock, "evq", NULL, MTX_DEF);
evq->init_state = SFXGE_EVQ_INITIALIZED;
return (0);
}
void
sfxge_ev_fini(struct sfxge_softc *sc)
{
struct sfxge_intr *intr;
int index;
intr = &sc->intr;
KASSERT(intr->state == SFXGE_INTR_INITIALIZED,
("intr->state != SFXGE_INTR_INITIALIZED"));
sc->ev_moderation = 0;
/* Tear down the event queue(s). */
index = intr->n_alloc;
while (--index >= 0)
sfxge_ev_qfini(sc, index);
}
int
sfxge_ev_init(struct sfxge_softc *sc)
{
struct sysctl_ctx_list *sysctl_ctx = device_get_sysctl_ctx(sc->dev);
struct sysctl_oid *sysctl_tree = device_get_sysctl_tree(sc->dev);
struct sfxge_intr *intr;
int index;
int rc;
intr = &sc->intr;
KASSERT(intr->state == SFXGE_INTR_INITIALIZED,
("intr->state != SFXGE_INTR_INITIALIZED"));
/* Set default interrupt moderation; add a sysctl to
* read and change it.
*/
sc->ev_moderation = 30;
SYSCTL_ADD_PROC(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
OID_AUTO, "int_mod", CTLTYPE_UINT|CTLFLAG_RW,
sc, 0, sfxge_int_mod_handler, "IU",
"sfxge interrupt moderation (us)");
/*
* Initialize the event queue(s) - one per interrupt.
*/
for (index = 0; index < intr->n_alloc; index++) {
if ((rc = sfxge_ev_qinit(sc, index)) != 0)
goto fail;
}
sfxge_ev_stat_init(sc);
return (0);
fail:
while (--index >= 0)
sfxge_ev_qfini(sc, index);
return (rc);
}