Module Name: src
Committed By: skrll
Date: Sun Aug 14 09:01:25 UTC 2022
Modified Files:
src/sys/dev/pci: if_bge.c if_bgevar.h
Log Message:
Make bge(4) MP safe
This started out as a fix so that LOCKDEBUG wouldn't explode with kernel
lock spinout. LOCKDEBUG is too aggressive now and really should be
relaxed.
To generate a diff of this commit:
cvs rdiff -u -r1.374 -r1.375 src/sys/dev/pci/if_bge.c
cvs rdiff -u -r1.32 -r1.33 src/sys/dev/pci/if_bgevar.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/pci/if_bge.c
diff -u src/sys/dev/pci/if_bge.c:1.374 src/sys/dev/pci/if_bge.c:1.375
--- src/sys/dev/pci/if_bge.c:1.374 Sun Aug 14 08:42:33 2022
+++ src/sys/dev/pci/if_bge.c Sun Aug 14 09:01:25 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: if_bge.c,v 1.374 2022/08/14 08:42:33 skrll Exp $ */
+/* $NetBSD: if_bge.c,v 1.375 2022/08/14 09:01:25 skrll Exp $ */
/*
* Copyright (c) 2001 Wind River Systems
@@ -79,7 +79,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.374 2022/08/14 08:42:33 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.375 2022/08/14 09:01:25 skrll Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -206,13 +206,17 @@ static int bge_encap(struct bge_softc *,
static int bge_intr(void *);
static void bge_start(struct ifnet *);
+static void bge_start_locked(struct ifnet *);
static int bge_ifflags_cb(struct ethercom *);
static int bge_ioctl(struct ifnet *, u_long, void *);
static int bge_init(struct ifnet *);
+static int bge_init_locked(struct ifnet *);
static void bge_stop(struct ifnet *, int);
-static void bge_watchdog(struct ifnet *);
+static void bge_stop_locked(struct ifnet *, int);
+static bool bge_watchdog(struct ifnet *);
static int bge_ifmedia_upd(struct ifnet *);
static void bge_ifmedia_sts(struct ifnet *, struct ifmediareq *);
+static void bge_handle_reset_work(struct work *, void *);
static uint8_t bge_nvram_getbyte(struct bge_softc *, int, uint8_t *);
static int bge_read_nvram(struct bge_softc *, uint8_t *, int, int);
@@ -529,6 +533,12 @@ static const struct bge_revision bge_maj
static int bge_allow_asf = 1;
+#ifndef BGE_WATCHDOG_TIMEOUT
+#define BGE_WATCHDOG_TIMEOUT 5
+#endif
+static int bge_watchdog_timeout = BGE_WATCHDOG_TIMEOUT;
+
+
CFATTACH_DECL3_NEW(bge, sizeof(struct bge_softc),
bge_probe, bge_attach, bge_detach, NULL, NULL, NULL, DVF_DETACH_SHUTDOWN);
@@ -1247,7 +1257,6 @@ static void
bge_set_thresh(struct ifnet *ifp, int lvl)
{
struct bge_softc * const sc = ifp->if_softc;
- int s;
/*
* For now, just save the new Rx-intr thresholds and record
@@ -1256,11 +1265,11 @@ bge_set_thresh(struct ifnet *ifp, int lv
* occasionally cause glitches where Rx-interrupts are not
* honoured for up to 10 seconds. [email protected], 2003-04-05
*/
- s = splnet();
+ mutex_enter(sc->sc_core_lock);
sc->bge_rx_coal_ticks = bge_rx_threshes[lvl].rx_ticks;
sc->bge_rx_max_coal_bds = bge_rx_threshes[lvl].rx_max_bds;
sc->bge_pending_rxintr_change = 1;
- splx(s);
+ mutex_exit(sc->sc_core_lock);
}
@@ -1311,8 +1320,8 @@ static int
bge_alloc_jumbo_mem(struct bge_softc *sc)
{
char *ptr, *kva;
- int i, rseg, state, error;
- struct bge_jpool_entry *entry;
+ int i, rseg, state, error;
+ struct bge_jpool_entry *entry;
state = error = 0;
@@ -1325,8 +1334,7 @@ bge_alloc_jumbo_mem(struct bge_softc *sc
state = 1;
if (bus_dmamem_map(sc->bge_dmatag, &sc->bge_cdata.bge_rx_jumbo_seg,
- rseg, BGE_JMEM, (void **)&kva,
- BUS_DMA_NOWAIT)) {
+ rseg, BGE_JMEM, (void **)&kva, BUS_DMA_NOWAIT)) {
aprint_error_dev(sc->bge_dev,
"can't map DMA buffers (%d bytes)\n", (int)BGE_JMEM);
error = ENOBUFS;
@@ -1443,7 +1451,6 @@ bge_jfree(struct mbuf *m, void *buf, siz
{
struct bge_jpool_entry *entry;
struct bge_softc * const sc = arg;
- int s;
if (sc == NULL)
panic("bge_jfree: can't find softc pointer!");
@@ -1454,17 +1461,17 @@ bge_jfree(struct mbuf *m, void *buf, siz
if (i < 0 || i >= BGE_JSLOTS)
panic("bge_jfree: asked to free buffer that we don't manage!");
- s = splvm();
+ mutex_enter(sc->sc_core_lock);
entry = SLIST_FIRST(&sc->bge_jinuse_listhead);
if (entry == NULL)
panic("bge_jfree: buffer not in use!");
entry->slot = i;
SLIST_REMOVE_HEAD(&sc->bge_jinuse_listhead, jpool_entries);
SLIST_INSERT_HEAD(&sc->bge_jfree_listhead, entry, jpool_entries);
+ mutex_exit(sc->sc_core_lock);
if (__predict_true(m != NULL))
pool_cache_put(mb_cache, m);
- splx(s);
}
@@ -1576,6 +1583,7 @@ bge_newbuf_jumbo(struct bge_softc *sc, i
bus_dmamap_sync(sc->bge_dmatag, sc->bge_cdata.bge_rx_jumbo_map,
mtod(m_new, char *) - (char *)sc->bge_cdata.bge_jumbo_buf,
BGE_JLEN, BUS_DMASYNC_PREREAD);
+
/* Set up the descriptor. */
r = &sc->bge_rdata->bge_rx_jumbo_ring[i];
sc->bge_cdata.bge_rx_jumbo_chain[i] = m_new;
@@ -1810,14 +1818,14 @@ static void
bge_setmulti(struct bge_softc *sc)
{
struct ethercom * const ec = &sc->ethercom;
- struct ifnet * const ifp = &ec->ec_if;
struct ether_multi *enm;
struct ether_multistep step;
uint32_t hashes[4] = { 0, 0, 0, 0 };
uint32_t h;
int i;
- if (ifp->if_flags & IFF_PROMISC)
+ KASSERT(mutex_owned(sc->sc_core_lock));
+ if (sc->bge_if_flags & IFF_PROMISC)
goto allmulti;
/* Now program new ones. */
@@ -1845,13 +1853,15 @@ bge_setmulti(struct bge_softc *sc)
hashes[(h & 0x60) >> 5] |= 1U << (h & 0x1F);
ETHER_NEXT_MULTI(step, enm);
}
+ ec->ec_flags &= ~ETHER_F_ALLMULTI;
ETHER_UNLOCK(ec);
- ifp->if_flags &= ~IFF_ALLMULTI;
goto setit;
allmulti:
- ifp->if_flags |= IFF_ALLMULTI;
+ ETHER_LOCK(ec);
+ ec->ec_flags |= ETHER_F_ALLMULTI;
+ ETHER_UNLOCK(ec);
hashes[0] = hashes[1] = hashes[2] = hashes[3] = 0xffffffff;
setit:
@@ -3631,6 +3641,18 @@ bge_attach(device_t parent, device_t sel
break;
}
+ char wqname[MAXCOMLEN];
+ snprintf(wqname, sizeof(wqname), "%sReset", device_xname(sc->bge_dev));
+ int error = workqueue_create(&sc->sc_reset_wq, wqname,
+ bge_handle_reset_work, sc, PRI_NONE, IPL_SOFTCLOCK,
+ WQ_MPSAFE);
+ if (error) {
+ aprint_error_dev(sc->bge_dev,
+ "unable to create reset workqueue\n");
+ return;
+ }
+
+
/*
* All controllers except BCM5700 supports tagged status but
* we use tagged status only for MSI case on BCM5717. Otherwise
@@ -3830,15 +3852,17 @@ bge_attach(device_t parent, device_t sel
else
sc->bge_return_ring_cnt = BGE_RETURN_RING_CNT;
+ sc->sc_core_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET);
+
/* Set up ifnet structure */
ifp = &sc->ethercom.ec_if;
ifp->if_softc = sc;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
+ ifp->if_extflags = IFEF_MPSAFE;
ifp->if_ioctl = bge_ioctl;
ifp->if_stop = bge_stop;
ifp->if_start = bge_start;
ifp->if_init = bge_init;
- ifp->if_watchdog = bge_watchdog;
IFQ_SET_MAXLEN(&ifp->if_snd, uimax(BGE_TX_RING_CNT - 1, IFQ_MAXLEN));
IFQ_SET_READY(&ifp->if_snd);
DPRINTFN(5, ("strcpy if_xname\n"));
@@ -3986,12 +4010,16 @@ again:
/*
* Call MI attach routine.
*/
- DPRINTFN(5, ("if_attach\n"));
- if_attach(ifp);
+ DPRINTFN(5, ("if_initialize\n"));
+ if_initialize(ifp);
+ ifp->if_percpuq = if_percpuq_create(ifp);
if_deferred_start_init(ifp, NULL);
+ if_register(ifp);
+
DPRINTFN(5, ("ether_ifattach\n"));
ether_ifattach(ifp, eaddr);
ether_set_ifflags_cb(&sc->ethercom, bge_ifflags_cb);
+
rnd_attach_source(&sc->rnd_source, device_xname(sc->bge_dev),
RND_TYPE_NET, RND_FLAG_DEFAULT);
#ifdef BGE_EVENT_COUNTERS
@@ -4018,7 +4046,7 @@ again:
NULL, device_xname(sc->bge_dev), "xoffentered");
#endif /* BGE_EVENT_COUNTERS */
DPRINTFN(5, ("callout_init\n"));
- callout_init(&sc->bge_timeout, 0);
+ callout_init(&sc->bge_timeout, CALLOUT_MPSAFE);
callout_setfunc(&sc->bge_timeout, bge_tick, sc);
if (pmf_device_register(self, NULL, NULL))
@@ -4042,12 +4070,9 @@ bge_detach(device_t self, int flags __un
{
struct bge_softc * const sc = device_private(self);
struct ifnet * const ifp = &sc->ethercom.ec_if;
- int s;
- s = splnet();
/* Stop the interface. Callouts are stopped in it. */
bge_stop(ifp, 1);
- splx(s);
mii_detach(&sc->bge_mii, MII_PHY_ANY, MII_OFFSET_ANY);
@@ -4654,11 +4679,8 @@ bge_txeof(struct bge_softc *sc)
}
sc->bge_txcnt--;
BGE_INC(sc->bge_tx_saved_considx, BGE_TX_RING_CNT);
- ifp->if_timer = 0;
+ sc->bge_tx_sending = false;
}
-
- if (cur_tx != NULL)
- ifp->if_flags &= ~IFF_OACTIVE;
}
static int
@@ -4669,11 +4691,12 @@ bge_intr(void *xsc)
uint32_t pcistate, statusword, statustag;
uint32_t intrmask = BGE_PCISTATE_INTR_NOT_ACTIVE;
-
/* 5717 and newer chips have no BGE_PCISTATE_INTR_NOT_ACTIVE bit */
if (BGE_IS_5717_PLUS(sc))
intrmask = 0;
+ mutex_enter(sc->sc_core_lock);
+
/*
* It is possible for the interrupt to arrive before
* the status block is updated prior to the interrupt.
@@ -4694,6 +4717,7 @@ bge_intr(void *xsc)
if (sc->bge_lasttag == statustag &&
(~pcistate & intrmask)) {
BGE_EVCNT_INCR(sc->bge_ev_intr_spurious);
+ mutex_exit(sc->sc_core_lock);
return 0;
}
sc->bge_lasttag = statustag;
@@ -4701,6 +4725,7 @@ bge_intr(void *xsc)
if (!(statusword & BGE_STATFLAG_UPDATED) &&
!(~pcistate & intrmask)) {
BGE_EVCNT_INCR(sc->bge_ev_intr_spurious2);
+ mutex_exit(sc->sc_core_lock);
return 0;
}
statustag = 0;
@@ -4722,7 +4747,7 @@ bge_intr(void *xsc)
BGE_STS_BIT(sc, BGE_STS_LINK_EVT))
bge_link_upd(sc);
- if (ifp->if_flags & IFF_RUNNING) {
+ if (sc->bge_if_flags & IFF_RUNNING) {
/* Check RX return ring producer/consumer */
bge_rxeof(sc);
@@ -4749,9 +4774,11 @@ bge_intr(void *xsc)
/* Re-enable interrupts. */
bge_writembx_flush(sc, BGE_MBX_IRQ0_LO, statustag);
- if (ifp->if_flags & IFF_RUNNING)
+ if (sc->bge_if_flags & IFF_RUNNING)
if_schedule_deferred_start(ifp);
+ mutex_exit(sc->sc_core_lock);
+
return 1;
}
@@ -4783,10 +4810,10 @@ static void
bge_tick(void *xsc)
{
struct bge_softc * const sc = xsc;
+ struct ifnet * const ifp = &sc->ethercom.ec_if;
struct mii_data * const mii = &sc->bge_mii;
- int s;
- s = splnet();
+ mutex_enter(sc->sc_core_lock);
if (BGE_IS_5705_PLUS(sc))
bge_stats_update_regs(sc);
@@ -4813,16 +4840,18 @@ bge_tick(void *xsc)
bge_asf_driver_up(sc);
- if (!sc->bge_detaching)
+ const bool ok = bge_watchdog(ifp);
+
+ if (ok && !sc->bge_detaching)
callout_schedule(&sc->bge_timeout, hz);
- splx(s);
+ mutex_exit(sc->sc_core_lock);
}
static void
bge_stats_update_regs(struct bge_softc *sc)
{
- struct ifnet *const ifp = &sc->ethercom.ec_if;
+ struct ifnet * const ifp = &sc->ethercom.ec_if;
net_stat_ref_t nsr = IF_STAT_GETREF(ifp);
@@ -5096,7 +5125,6 @@ bge_compact_dma_runt(struct mbuf *pkt)
static int
bge_encap(struct bge_softc *sc, struct mbuf *m_head, uint32_t *txidx)
{
- struct ifnet * const ifp = &sc->ethercom.ec_if;
struct bge_tx_bd *f, *prev_f;
uint32_t frag, cur;
uint16_t csum_flags = 0;
@@ -5149,7 +5177,6 @@ check_dma_bug:
doit:
dma = SLIST_FIRST(&sc->txdma_list);
if (dma == NULL) {
- ifp->if_flags |= IFF_OACTIVE;
return ENOBUFS;
}
dmamap = dma->dmamap;
@@ -5420,17 +5447,27 @@ load_again:
fail_unload:
bus_dmamap_unload(dmatag, dmamap);
- ifp->if_flags |= IFF_OACTIVE;
return ENOBUFS;
}
+
+static void
+bge_start(struct ifnet *ifp)
+{
+ struct bge_softc * const sc = ifp->if_softc;
+
+ mutex_enter(sc->sc_core_lock);
+ bge_start_locked(ifp);
+ mutex_exit(sc->sc_core_lock);
+}
+
/*
* Main transmit routine. To avoid having to do mbuf copies, we put pointers
* to the mbuf data regions directly in the transmit descriptors.
*/
static void
-bge_start(struct ifnet *ifp)
+bge_start_locked(struct ifnet *ifp)
{
struct bge_softc * const sc = ifp->if_softc;
struct mbuf *m_head = NULL;
@@ -5439,7 +5476,7 @@ bge_start(struct ifnet *ifp)
int pkts = 0;
int error;
- if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
+ if ((sc->bge_if_flags & IFF_RUNNING) != IFF_RUNNING)
return;
prodidx = sc->bge_tx_prodidx;
@@ -5475,7 +5512,7 @@ bge_start(struct ifnet *ifp)
*/
error = bge_encap(sc, m_head, &prodidx);
if (__predict_false(error)) {
- if (ifp->if_flags & IFF_OACTIVE) {
+ if (SLIST_EMPTY(&sc->txdma_list)) {
/* just wait for the transmit ring to drain */
break;
}
@@ -5506,27 +5543,37 @@ bge_start(struct ifnet *ifp)
bge_writembx(sc, BGE_MBX_TX_HOST_PROD0_LO, prodidx);
sc->bge_tx_prodidx = prodidx;
-
- /*
- * Set a timeout in case the chip goes out to lunch.
- */
- ifp->if_timer = 5;
+ sc->bge_tx_lastsent = time_uptime;
+ sc->bge_tx_sending = true;
}
static int
bge_init(struct ifnet *ifp)
{
struct bge_softc * const sc = ifp->if_softc;
+
+ mutex_enter(sc->sc_core_lock);
+ int ret = bge_init_locked(ifp);
+ mutex_exit(sc->sc_core_lock);
+
+ return ret;
+}
+
+
+static int
+bge_init_locked(struct ifnet *ifp)
+{
+ struct bge_softc * const sc = ifp->if_softc;
const uint16_t *m;
uint32_t mode, reg;
- int s, error = 0;
-
- s = splnet();
+ int error = 0;
+ KASSERT(IFNET_LOCKED(ifp));
+ KASSERT(mutex_owned(sc->sc_core_lock));
KASSERT(ifp == &sc->ethercom.ec_if);
/* Cancel pending I/O and flush buffers. */
- bge_stop(ifp, 0);
+ bge_stop_locked(ifp, 0);
bge_stop_fw(sc);
bge_sig_pre_reset(sc, BGE_RESET_START);
@@ -5593,7 +5640,6 @@ bge_init(struct ifnet *ifp)
if (error != 0) {
aprint_error_dev(sc->bge_dev, "initialization error %d\n",
error);
- splx(s);
return error;
}
@@ -5610,7 +5656,7 @@ bge_init(struct ifnet *ifp)
((uint32_t)htons(m[1]) << 16) | htons(m[2]));
/* Enable or disable promiscuous mode as needed. */
- if (ifp->if_flags & IFF_PROMISC)
+ if (sc->bge_if_flags & IFF_PROMISC)
BGE_SETBIT(sc, BGE_RX_MODE, BGE_RXMODE_RX_PROMISC);
else
BGE_CLRBIT(sc, BGE_RX_MODE, BGE_RXMODE_RX_PROMISC);
@@ -5700,14 +5746,13 @@ bge_init(struct ifnet *ifp)
if ((error = bge_ifmedia_upd(ifp)) != 0)
goto out;
+ /* IFNET_LOCKED asserted above */
ifp->if_flags |= IFF_RUNNING;
- ifp->if_flags &= ~IFF_OACTIVE;
callout_schedule(&sc->bge_timeout, hz);
out:
sc->bge_if_flags = ifp->if_flags;
- splx(s);
return error;
}
@@ -5846,22 +5891,28 @@ bge_ifflags_cb(struct ethercom *ec)
{
struct ifnet * const ifp = &ec->ec_if;
struct bge_softc * const sc = ifp->if_softc;
- u_short change = ifp->if_flags ^ sc->bge_if_flags;
+ int ret = 0;
- if ((change & ~(IFF_CANTCHANGE | IFF_DEBUG)) != 0)
- return ENETRESET;
- else if ((change & (IFF_PROMISC | IFF_ALLMULTI)) == 0)
- return 0;
+ KASSERT(IFNET_LOCKED(ifp));
+ mutex_enter(sc->sc_core_lock);
- if ((ifp->if_flags & IFF_PROMISC) == 0)
- BGE_CLRBIT(sc, BGE_RX_MODE, BGE_RXMODE_RX_PROMISC);
- else
- BGE_SETBIT(sc, BGE_RX_MODE, BGE_RXMODE_RX_PROMISC);
+ u_short change = ifp->if_flags ^ sc->bge_if_flags;
- bge_setmulti(sc);
+ if ((change & ~(IFF_CANTCHANGE | IFF_DEBUG)) != 0) {
+ ret = ENETRESET;
+ } else if ((change & (IFF_PROMISC | IFF_ALLMULTI)) != 0) {
+ if ((ifp->if_flags & IFF_PROMISC) == 0)
+ BGE_CLRBIT(sc, BGE_RX_MODE, BGE_RXMODE_RX_PROMISC);
+ else
+ BGE_SETBIT(sc, BGE_RX_MODE, BGE_RXMODE_RX_PROMISC);
+
+ bge_setmulti(sc);
+ }
sc->bge_if_flags = ifp->if_flags;
- return 0;
+ mutex_exit(sc->sc_core_lock);
+
+ return ret;
}
static int
@@ -5869,13 +5920,21 @@ bge_ioctl(struct ifnet *ifp, u_long comm
{
struct bge_softc * const sc = ifp->if_softc;
struct ifreq * const ifr = (struct ifreq *) data;
- int s, error = 0;
- struct mii_data *mii;
+ int error = 0;
+
+ switch (command) {
+ case SIOCADDMULTI:
+ case SIOCDELMULTI:
+ break;
+ default:
+ KASSERT(IFNET_LOCKED(ifp));
+ }
- s = splnet();
+ const int s = splnet();
switch (command) {
case SIOCSIFMEDIA:
+ mutex_enter(sc->sc_core_lock);
/* XXX Flow control is not supported for 1000BASE-SX */
if (sc->bge_flags & BGEF_FIBER_TBI) {
ifr->ifr_media &= ~IFM_ETH_FMASK;
@@ -5895,12 +5954,13 @@ bge_ioctl(struct ifnet *ifp, u_long comm
}
sc->bge_flowflags = ifr->ifr_media & IFM_ETH_FMASK;
}
+ mutex_exit(sc->sc_core_lock);
if (sc->bge_flags & BGEF_FIBER_TBI) {
error = ifmedia_ioctl(ifp, ifr, &sc->bge_ifmedia,
command);
} else {
- mii = &sc->bge_mii;
+ struct mii_data * const mii = &sc->bge_mii;
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media,
command);
}
@@ -5911,10 +5971,13 @@ bge_ioctl(struct ifnet *ifp, u_long comm
error = 0;
- if (command != SIOCADDMULTI && command != SIOCDELMULTI)
- ;
- else if (ifp->if_flags & IFF_RUNNING)
- bge_setmulti(sc);
+ if (command == SIOCADDMULTI || command == SIOCDELMULTI) {
+ mutex_enter(sc->sc_core_lock);
+ if (sc->bge_if_flags & IFF_RUNNING) {
+ bge_setmulti(sc);
+ }
+ mutex_exit(sc->sc_core_lock);
+ }
break;
}
@@ -5923,23 +5986,29 @@ bge_ioctl(struct ifnet *ifp, u_long comm
return error;
}
-static void
-bge_watchdog(struct ifnet *ifp)
+static bool
+bge_watchdog_check(struct bge_softc * const sc)
{
- struct bge_softc * const sc = ifp->if_softc;
- uint32_t status;
+
+ KASSERT(mutex_owned(sc->sc_core_lock));
+
+ if (!sc->bge_tx_sending)
+ return true;
+
+ if (time_uptime - sc->bge_tx_lastsent <= bge_watchdog_timeout)
+ return true;
/* If pause frames are active then don't reset the hardware. */
if ((CSR_READ_4(sc, BGE_RX_MODE) & BGE_RXMODE_FLOWCTL_ENABLE) != 0) {
- status = CSR_READ_4(sc, BGE_RX_STS);
+ const uint32_t status = CSR_READ_4(sc, BGE_RX_STS);
if ((status & BGE_RXSTAT_REMOTE_XOFFED) != 0) {
/*
* If link partner has us in XOFF state then wait for
* the condition to clear.
*/
CSR_WRITE_4(sc, BGE_RX_STS, status);
- ifp->if_timer = 5;
- return;
+ sc->bge_tx_lastsent = time_uptime;
+ return true;
} else if ((status & BGE_RXSTAT_RCVD_XOFF) != 0 &&
(status & BGE_RXSTAT_RCVD_XON) != 0) {
/*
@@ -5947,8 +6016,8 @@ bge_watchdog(struct ifnet *ifp)
* the condition to clear.
*/
CSR_WRITE_4(sc, BGE_RX_STS, status);
- ifp->if_timer = 5;
- return;
+ sc->bge_tx_lastsent = time_uptime;
+ return true;
}
/*
* Any other condition is unexpected and the controller
@@ -5956,12 +6025,52 @@ bge_watchdog(struct ifnet *ifp)
*/
}
+ return false;
+}
+
+static bool
+bge_watchdog(struct ifnet *ifp)
+{
+ struct bge_softc * const sc = ifp->if_softc;
+
+ KASSERT(mutex_owned(sc->sc_core_lock));
+
+ if (!sc->sc_triggerreset && bge_watchdog_check(sc))
+ return true;
+
aprint_error_dev(sc->bge_dev, "watchdog timeout -- resetting\n");
- ifp->if_flags &= ~IFF_RUNNING;
+ if (atomic_swap_uint(&sc->sc_reset_pending, 1) == 0)
+ workqueue_enqueue(sc->sc_reset_wq, &sc->sc_reset_work, NULL);
+
+ return false;
+}
+
+/*
+ * Perform an interface watchdog reset.
+ */
+static void
+bge_handle_reset_work(struct work *work, void *arg)
+{
+ struct bge_softc * const sc = arg;
+ struct ifnet * const ifp = &sc->ethercom.ec_if;
+
+ /* Don't want ioctl operations to happen */
+ IFNET_LOCK(ifp);
+
+ /* reset the interface. */
bge_init(ifp);
- if_statinc(ifp, if_oerrors);
+ IFNET_UNLOCK(ifp);
+
+ /*
+ * There are still some upper layer processing which call
+ * ifp->if_start(). e.g. ALTQ or one CPU system
+ */
+ /* Try to get more packets going. */
+ ifp->if_start(ifp);
+
+ atomic_store_relaxed(&sc->sc_reset_pending, 0);
}
static void
@@ -5987,15 +6096,30 @@ bge_stop_block(struct bge_softc *sc, bus
(u_long)reg, bit);
}
+
+static void
+bge_stop(struct ifnet *ifp, int disable)
+{
+ struct bge_softc * const sc = ifp->if_softc;
+
+ ASSERT_SLEEPABLE();
+
+ mutex_enter(sc->sc_core_lock);
+ bge_stop_locked(ifp, disable);
+ mutex_exit(sc->sc_core_lock);
+}
+
/*
* Stop the adapter and free any mbufs allocated to the
* RX and TX lists.
*/
static void
-bge_stop(struct ifnet *ifp, int disable)
+bge_stop_locked(struct ifnet *ifp, int disable)
{
struct bge_softc * const sc = ifp->if_softc;
+ KASSERT(mutex_owned(sc->sc_core_lock));
+
if (disable) {
sc->bge_detaching = 1;
callout_halt(&sc->bge_timeout, NULL);
@@ -6093,7 +6217,7 @@ bge_stop(struct ifnet *ifp, int disable)
/* Clear MAC's link state (PHY may still have link UP). */
BGE_STS_CLRBIT(sc, BGE_STS_LINK);
- ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
+ ifp->if_flags &= ~IFF_RUNNING;
}
static void
@@ -6277,6 +6401,16 @@ bge_sysctl_init(struct bge_softc *sc)
bge_rxthresh_nodenum = node->sysctl_num;
+#ifdef BGE_DEBUG
+ if ((rc = sysctl_createv(&sc->bge_log, 0, NULL, &node,
+ CTLFLAG_READWRITE,
+ CTLTYPE_BOOL, "trigger_reset",
+ SYSCTL_DESCR("Trigger an interface reset"),
+ NULL, 0, &sc->sc_triggerreset, 0, CTL_CREATE,
+ CTL_EOL)) != 0) {
+ goto out;
+ }
+#endif
return;
out:
Index: src/sys/dev/pci/if_bgevar.h
diff -u src/sys/dev/pci/if_bgevar.h:1.32 src/sys/dev/pci/if_bgevar.h:1.33
--- src/sys/dev/pci/if_bgevar.h:1.32 Sun Aug 14 08:45:56 2022
+++ src/sys/dev/pci/if_bgevar.h Sun Aug 14 09:01:25 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: if_bgevar.h,v 1.32 2022/08/14 08:45:56 skrll Exp $ */
+/* $NetBSD: if_bgevar.h,v 1.33 2022/08/14 09:01:25 skrll Exp $ */
/*
* Copyright (c) 2001 Wind River Systems
* Copyright (c) 1997, 1998, 1999, 2001
@@ -68,6 +68,7 @@
#include <sys/bus.h>
#include <sys/rndsource.h>
+#include <sys/time.h>
#include <net/if_ether.h>
@@ -327,6 +328,9 @@ struct bge_softc {
uint32_t bge_flags;
uint32_t bge_phy_flags;
int bge_flowflags;
+ time_t bge_tx_lastsent;
+ bool bge_tx_sending;
+
#ifdef BGE_EVENT_COUNTERS
/*
* Event counters.
@@ -352,6 +356,13 @@ struct bge_softc {
struct sysctllog *bge_log;
krndsource_t rnd_source; /* random source */
+
+ kmutex_t *sc_core_lock; /* lock for softc operations */
+ struct workqueue *sc_reset_wq;
+ struct work sc_reset_work;
+ volatile unsigned sc_reset_pending;
+
+ bool sc_triggerreset;
};
#endif /* _DEV_PCI_IF_BGEVAR_H_ */
