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sfxge(4): prepare the number of Tx queues on event queue 0 to become variable

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The number of Tx queues on event queue 0 can depend on the NIC family type,
and this property will be leveraged by future patches.
This patch prepares the code for this change.

Submitted by:   Ivan Malov <Ivan.Malov at oktetlabs.ru>
Sponsored by:   Solarflare Communications, Inc.
MFC after:      1 week
Differential Revision:  https://reviews.freebsd.org/D18389
This commit is contained in:
Andrew Rybchenko 2018-12-10 09:35:53 +00:00
parent dc373f7885
commit e4b0a127b5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=341784
4 changed files with 14 additions and 11 deletions
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12
sys/dev/sfxge/sfxge.c
View file

@ -151,8 +151,8 @@ sfxge_estimate_rsrc_limits(struct sfxge_softc *sc)
limits.edl_min_evq_count = 1;
limits.edl_max_evq_count = evq_max;
limits.edl_min_txq_count = SFXGE_TXQ_NTYPES;
limits.edl_max_txq_count = evq_max + SFXGE_TXQ_NTYPES - 1;
limits.edl_min_txq_count = SFXGE_EVQ0_N_TXQ(sc);
limits.edl_max_txq_count = evq_max + SFXGE_EVQ0_N_TXQ(sc) - 1;
limits.edl_min_rxq_count = 1;
limits.edl_max_rxq_count = evq_max;
@ -168,12 +168,12 @@ sfxge_estimate_rsrc_limits(struct sfxge_softc *sc)
return (rc);
}
KASSERT(txq_allocated >= SFXGE_TXQ_NTYPES,
("txq_allocated < SFXGE_TXQ_NTYPES"));
KASSERT(txq_allocated >= SFXGE_EVQ0_N_TXQ(sc),
("txq_allocated < %u", SFXGE_EVQ0_N_TXQ(sc)));
sc->evq_max = MIN(evq_allocated, evq_max);
sc->evq_max = MIN(rxq_allocated, sc->evq_max);
sc->evq_max = MIN(txq_allocated - (SFXGE_TXQ_NTYPES - 1),
sc->evq_max = MIN(txq_allocated - (SFXGE_EVQ0_N_TXQ(sc) - 1),
sc->evq_max);
KASSERT(sc->evq_max <= evq_max,
@ -205,7 +205,7 @@ sfxge_set_drv_limits(struct sfxge_softc *sc)
limits.edl_min_evq_count = limits.edl_max_evq_count =
sc->intr.n_alloc;
limits.edl_min_txq_count = limits.edl_max_txq_count =
sc->intr.n_alloc + SFXGE_TXQ_NTYPES - 1;
sc->intr.n_alloc + SFXGE_EVQ0_N_TXQ(sc) - 1;
limits.edl_min_rxq_count = limits.edl_max_rxq_count =
sc->intr.n_alloc;

5
sys/dev/sfxge/sfxge_ev.c
View file

@ -269,9 +269,10 @@ sfxge_get_txq_by_label(struct sfxge_evq *evq, enum sfxge_txq_type label)
{
unsigned int index;
KASSERT((evq->index == 0 && label < SFXGE_TXQ_NTYPES) ||
KASSERT((evq->index == 0 && label < SFXGE_EVQ0_N_TXQ(evq->sc)) ||
(label == SFXGE_TXQ_IP_TCP_UDP_CKSUM), ("unexpected txq label"));
index = (evq->index == 0) ? label : (evq->index - 1 + SFXGE_TXQ_NTYPES);
index = (evq->index == 0) ?
label : (evq->index - 1 + SFXGE_EVQ0_N_TXQ(evq->sc));
return (evq->sc->txq[index]);
}

6
sys/dev/sfxge/sfxge_tx.c
View file

@ -1973,7 +1973,7 @@ sfxge_tx_init(struct sfxge_softc *sc)
goto fail_tx_dpl_put_max;
}
sc->txq_count = SFXGE_TXQ_NTYPES - 1 + sc->intr.n_alloc;
sc->txq_count = SFXGE_EVQ0_N_TXQ(sc) - 1 + sc->intr.n_alloc;
sc->tso_fw_assisted = sfxge_tso_fw_assisted;
if ((~encp->enc_features & EFX_FEATURE_FW_ASSISTED_TSO) ||
@ -2002,9 +2002,9 @@ sfxge_tx_init(struct sfxge_softc *sc)
goto fail2;
for (index = 0;
index < sc->txq_count - SFXGE_TXQ_NTYPES + 1;
index < sc->txq_count - SFXGE_EVQ0_N_TXQ(sc) + 1;
index++) {
if ((rc = sfxge_tx_qinit(sc, SFXGE_TXQ_NTYPES - 1 + index,
if ((rc = sfxge_tx_qinit(sc, SFXGE_EVQ0_N_TXQ(sc) - 1 + index,
SFXGE_TXQ_IP_TCP_UDP_CKSUM, index)) != 0)
goto fail3;
}

2
sys/dev/sfxge/sfxge_tx.h
View file

@ -139,6 +139,8 @@ enum sfxge_txq_type {
SFXGE_TXQ_NTYPES
};
#define SFXGE_EVQ0_N_TXQ(_sc) SFXGE_TXQ_NTYPES
#define SFXGE_TXQ_UNBLOCK_LEVEL(_entries) (EFX_TXQ_LIMIT(_entries) / 4)
#define SFXGE_TX_BATCH 64