From 76c33d7c994317b5fe40c14516a3c151f9a8f843 Mon Sep 17 00:00:00 2001 From: jmg Date: Fri, 20 Aug 2004 06:22:04 +0000 Subject: fix LOR's in sk. Original patch from dwhite. This moves the memory allocation earlier on in sk_attach so we don't have to lock until a bit later. PR: 69752 --- sys/dev/sk/if_sk.c | 96 +++++++++++++++++++++++++++++---------------------- sys/dev/sk/if_skreg.h | 4 +-- 2 files changed, 56 insertions(+), 44 deletions(-) (limited to 'sys/dev/sk') diff --git a/sys/dev/sk/if_sk.c b/sys/dev/sk/if_sk.c index ab84645..49ad9e2 100644 --- a/sys/dev/sk/if_sk.c +++ b/sys/dev/sk/if_sk.c @@ -1337,7 +1337,6 @@ sk_attach(dev) error = 0; sc_if = device_get_softc(dev); sc = device_get_softc(device_get_parent(dev)); - SK_LOCK(sc); port = *(int *)device_get_ivars(dev); free(device_get_ivars(dev), M_DEVBUF); device_set_ivars(dev, NULL); @@ -1352,6 +1351,40 @@ sk_attach(dev) if (port == SK_PORT_B) sc_if->sk_tx_bmu = SK_BMU_TXS_CSR1; + /* Allocate the descriptor queues. */ + sc_if->sk_rdata = contigmalloc(sizeof(struct sk_ring_data), M_DEVBUF, + M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0); + + if (sc_if->sk_rdata == NULL) { + printf("sk%d: no memory for list buffers!\n", sc_if->sk_unit); + error = ENOMEM; + goto fail; + } + + bzero(sc_if->sk_rdata, sizeof(struct sk_ring_data)); + + /* Try to allocate memory for jumbo buffers. */ + if (sk_alloc_jumbo_mem(sc_if)) { + printf("sk%d: jumbo buffer allocation failed\n", + sc_if->sk_unit); + error = ENOMEM; + goto fail; + } + + ifp = &sc_if->arpcom.ac_if; + ifp->if_softc = sc_if; + if_initname(ifp, device_get_name(dev), device_get_unit(dev)); + ifp->if_mtu = ETHERMTU; + ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; + ifp->if_ioctl = sk_ioctl; + ifp->if_start = sk_start; + ifp->if_watchdog = sk_watchdog; + ifp->if_init = sk_init; + ifp->if_baudrate = 1000000000; + ifp->if_snd.ifq_maxlen = SK_TX_RING_CNT - 1; + + callout_handle_init(&sc_if->sk_tick_ch); + /* * Get station address for this interface. Note that * dual port cards actually come with three station @@ -1361,6 +1394,7 @@ sk_attach(dev) * are operating in failover mode. Currently we don't * use this extra address. */ + SK_LOCK(sc); for (i = 0; i < ETHER_ADDR_LEN; i++) sc_if->arpcom.ac_enaddr[i] = sk_win_read_1(sc, SK_MAC0_0 + (port * 8) + i); @@ -1414,47 +1448,17 @@ sk_attach(dev) printf("skc%d: unsupported PHY type: %d\n", sc->sk_unit, sc_if->sk_phytype); error = ENODEV; + SK_UNLOCK(sc); goto fail; } - /* Allocate the descriptor queues. */ - sc_if->sk_rdata = contigmalloc(sizeof(struct sk_ring_data), M_DEVBUF, - M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0); - - if (sc_if->sk_rdata == NULL) { - printf("sk%d: no memory for list buffers!\n", sc_if->sk_unit); - error = ENOMEM; - goto fail; - } - - bzero(sc_if->sk_rdata, sizeof(struct sk_ring_data)); - - /* Try to allocate memory for jumbo buffers. */ - if (sk_alloc_jumbo_mem(sc_if)) { - printf("sk%d: jumbo buffer allocation failed\n", - sc_if->sk_unit); - error = ENOMEM; - goto fail; - } - - ifp = &sc_if->arpcom.ac_if; - ifp->if_softc = sc_if; - if_initname(ifp, device_get_name(dev), device_get_unit(dev)); - ifp->if_mtu = ETHERMTU; - ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; - ifp->if_ioctl = sk_ioctl; - ifp->if_start = sk_start; - ifp->if_watchdog = sk_watchdog; - ifp->if_init = sk_init; - ifp->if_baudrate = 1000000000; - ifp->if_snd.ifq_maxlen = SK_TX_RING_CNT - 1; - - callout_handle_init(&sc_if->sk_tick_ch); /* - * Call MI attach routine. + * Call MI attach routine. Can't hold locks when calling into ether_*. */ + SK_UNLOCK(sc); ether_ifattach(ifp, sc_if->arpcom.ac_enaddr); + SK_LOCK(sc); /* * Do miibus setup. @@ -1468,6 +1472,7 @@ sk_attach(dev) break; } + SK_UNLOCK(sc); if (mii_phy_probe(dev, &sc_if->sk_miibus, sk_ifmedia_upd, sk_ifmedia_sts)) { printf("skc%d: no PHY found!\n", sc_if->sk_unit); @@ -1477,7 +1482,6 @@ sk_attach(dev) } fail: - SK_UNLOCK(sc); if (error) { /* Access should be ok even though lock has been dropped */ sc->sk_if[port] = NULL; @@ -1629,7 +1633,7 @@ skc_attach(dev) bus_generic_attach(dev); /* Hook interrupt last to avoid having to lock softc */ - error = bus_setup_intr(dev, sc->sk_irq, INTR_TYPE_NET, + error = bus_setup_intr(dev, sc->sk_irq, INTR_TYPE_NET|INTR_MPSAFE, sk_intr, sc, &sc->sk_intrhand); if (error) { @@ -1667,14 +1671,24 @@ sk_detach(dev) /* These should only be active if attach_xmac succeeded */ if (device_is_attached(dev)) { sk_stop(sc_if); + /* Can't hold locks while calling detach */ + SK_IF_UNLOCK(sc_if); ether_ifdetach(ifp); + SK_IF_LOCK(sc_if); } - if (sc_if->sk_miibus) + /* + * We're generally called from skc_detach() which is using + * device_delete_child() to get to here. It's already trashed + * miibus for us, so don't do it here or we'll panic. + */ + /* + if (sc_if->sk_miibus != NULL) device_delete_child(dev, sc_if->sk_miibus); + */ bus_generic_detach(dev); - if (sc_if->sk_cdata.sk_jumbo_buf) + if (sc_if->sk_cdata.sk_jumbo_buf != NULL) contigfree(sc_if->sk_cdata.sk_jumbo_buf, SK_JMEM, M_DEVBUF); - if (sc_if->sk_rdata) { + if (sc_if->sk_rdata != NULL) { contigfree(sc_if->sk_rdata, sizeof(struct sk_ring_data), M_DEVBUF); } @@ -1691,7 +1705,6 @@ skc_detach(dev) sc = device_get_softc(dev); KASSERT(mtx_initialized(&sc->sk_mtx), ("sk mutex not initialized")); - SK_LOCK(sc); if (device_is_alive(dev)) { if (sc->sk_devs[SK_PORT_A] != NULL) @@ -1708,7 +1721,6 @@ skc_detach(dev) if (sc->sk_res) bus_release_resource(dev, SK_RES, SK_RID, sc->sk_res); - SK_UNLOCK(sc); mtx_destroy(&sc->sk_mtx); return(0); diff --git a/sys/dev/sk/if_skreg.h b/sys/dev/sk/if_skreg.h index 51ce15d..2ef61c4 100644 --- a/sys/dev/sk/if_skreg.h +++ b/sys/dev/sk/if_skreg.h @@ -1439,8 +1439,8 @@ struct sk_softc { #define SK_LOCK(_sc) mtx_lock(&(_sc)->sk_mtx) #define SK_UNLOCK(_sc) mtx_unlock(&(_sc)->sk_mtx) #define SK_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->sk_mtx, MA_OWNED) -#define SK_IF_LOCK(_sc) mtx_lock(&(_sc)->sk_softc->sk_mtx) -#define SK_IF_UNLOCK(_sc) mtx_unlock(&(_sc)->sk_softc->sk_mtx) +#define SK_IF_LOCK(_sc) SK_LOCK((_sc)->sk_softc) +#define SK_IF_UNLOCK(_sc) SK_UNLOCK((_sc)->sk_softc) /* Softc for each logical interface */ struct sk_if_softc { -- cgit v1.1