static void
ntb_transport_free_queue(struct ntb_transport_qp *qp)
{
struct ntb_queue_entry *entry;
if (qp == NULL)
return;
callout_drain(&qp->link_work);
ntb_db_set_mask(qp->ntb, 1ull << qp->qp_num);
taskqueue_drain(taskqueue_swi, &qp->rxc_db_work);
taskqueue_drain(taskqueue_swi, &qp->rx_completion_task);
qp->cb_data = NULL;
qp->rx_handler = NULL;
qp->tx_handler = NULL;
qp->event_handler = NULL;
while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_pend_q)))
free(entry, M_NTB_IF);
while ((entry = ntb_list_rm(&qp->ntb_rx_q_lock, &qp->rx_post_q)))
free(entry, M_NTB_IF);
while ((entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q)))
free(entry, M_NTB_IF);
set_bit(qp->qp_num, &qp->transport->qp_bitmap_free);
}
void vboxNetFltOsDeleteInstance(PVBOXNETFLTINS pThis)
{
taskqueue_drain(taskqueue_fast, &pThis->u.s.tskin);
taskqueue_drain(taskqueue_fast, &pThis->u.s.tskout);
mtx_destroy(&pThis->u.s.inq.ifq_mtx);
mtx_destroy(&pThis->u.s.outq.ifq_mtx);
if (pThis->u.s.node != NULL)
ng_rmnode_self(pThis->u.s.node);
pThis->u.s.node = NULL;
}
int main(int argc, char **argv)
{
struct taskqueue *t;
struct task task;
int retval;
t = taskqueue_create("test", M_WAITOK, taskqueue_thread_enqueue, &t);
if (!t) {
kprintf("unable to create taskqueue\n");
return 1;
}
retval = taskqueue_start_threads(&t,
4, /*num threads*/
PWAIT, /*priority*/
"%s", /* thread name */
"test");
if (retval != 0) {
kprintf("failed to create taskqueue threads\n");
return 1;
}
TASK_INIT(&task, /*priority*/0, task_worker, NULL);
retval = taskqueue_enqueue(t, &task);
if (retval != 0) {
kprintf("failed to enqueue task\n");
return 1;
}
taskqueue_drain(t, &task);
taskqueue_free(t);
return 0;
}
int
ubt_detach(device_t dev)
{
struct ubt_softc *sc = device_get_softc(dev);
node_p node = sc->sc_node;
/* Destroy Netgraph node */
if (node != NULL) {
sc->sc_node = NULL;
NG_NODE_REALLY_DIE(node);
ng_rmnode_self(node);
}
/* Make sure ubt_task in gone */
taskqueue_drain(taskqueue_swi, &sc->sc_task);
/* Free USB transfers, if any */
usbd_transfer_unsetup(sc->sc_xfer, UBT_N_TRANSFER);
/* Destroy queues */
UBT_NG_LOCK(sc);
NG_BT_MBUFQ_DESTROY(&sc->sc_cmdq);
NG_BT_MBUFQ_DESTROY(&sc->sc_aclq);
NG_BT_MBUFQ_DESTROY(&sc->sc_scoq);
UBT_NG_UNLOCK(sc);
mtx_destroy(&sc->sc_if_mtx);
mtx_destroy(&sc->sc_ng_mtx);
return (0);
} /* ubt_detach */
void
dmar_fini_qi(struct dmar_unit *unit)
{
struct dmar_qi_genseq gseq;
if (unit->qi_enabled)
return;
taskqueue_drain(unit->qi_taskqueue, &unit->qi_task);
taskqueue_free(unit->qi_taskqueue);
unit->qi_taskqueue = NULL;
DMAR_LOCK(unit);
/* quisce */
dmar_qi_ensure(unit, 1);
dmar_qi_emit_wait_seq(unit, &gseq, true);
dmar_qi_advance_tail(unit);
dmar_qi_wait_for_seq(unit, &gseq, false);
/* only after the quisce, disable queue */
dmar_disable_qi_intr(unit);
dmar_disable_qi(unit);
KASSERT(unit->inv_seq_waiters == 0,
("dmar%d: waiters on disabled queue", unit->unit));
DMAR_UNLOCK(unit);
kmem_free(kernel_arena, unit->inv_queue, unit->inv_queue_size);
unit->inv_queue = 0;
unit->inv_queue_size = 0;
unit->qi_enabled = 0;
}
static int
vtblk_detach(device_t dev)
{
struct vtblk_softc *sc;
sc = device_get_softc(dev);
VTBLK_LOCK(sc);
sc->vtblk_flags |= VTBLK_FLAG_DETACH;
if (device_is_attached(dev))
vtblk_stop(sc);
VTBLK_UNLOCK(sc);
if (sc->vtblk_tq != NULL) {
taskqueue_drain(sc->vtblk_tq, &sc->vtblk_intr_task);
taskqueue_free(sc->vtblk_tq);
sc->vtblk_tq = NULL;
}
vtblk_drain(sc);
if (sc->vtblk_disk != NULL) {
disk_destroy(sc->vtblk_disk);
sc->vtblk_disk = NULL;
}
if (sc->vtblk_sglist != NULL) {
sglist_free(sc->vtblk_sglist);
sc->vtblk_sglist = NULL;
}
VTBLK_LOCK_DESTROY(sc);
return (0);
}
static void
ntb_transport_free(struct ntb_transport_ctx *nt)
{
struct ntb_softc *ntb = nt->ntb;
struct _qpset qp_bitmap_alloc;
uint8_t i;
ntb_transport_link_cleanup(nt);
taskqueue_drain(taskqueue_swi, &nt->link_cleanup);
callout_drain(&nt->link_work);
callout_drain(&nt->link_watchdog);
BIT_COPY(QP_SETSIZE, &nt->qp_bitmap, &qp_bitmap_alloc);
BIT_NAND(QP_SETSIZE, &qp_bitmap_alloc, &nt->qp_bitmap_free);
/* Verify that all the QPs are freed */
for (i = 0; i < nt->qp_count; i++)
if (test_bit(i, &qp_bitmap_alloc))
ntb_transport_free_queue(&nt->qp_vec[i]);
ntb_link_disable(ntb);
ntb_clear_ctx(ntb);
for (i = 0; i < nt->mw_count; i++)
ntb_free_mw(nt, i);
free(nt->qp_vec, M_NTB_IF);
}
/*
* Tear down vap state and reclaim the ifnet.
* The driver is assumed to have prepared for
* this; e.g. by turning off interrupts for the
* underlying device.
*/
void
ieee80211_vap_detach(struct ieee80211vap *vap)
{
struct ieee80211com *ic = vap->iv_ic;
struct ifnet *ifp = vap->iv_ifp;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
__func__, ieee80211_opmode_name[vap->iv_opmode],
ic->ic_ifp->if_xname);
/* NB: bpfdetach is called by ether_ifdetach and claims all taps */
ether_ifdetach(ifp);
ieee80211_stop(vap);
/*
* Flush any deferred vap tasks.
*/
ieee80211_draintask(ic, &vap->iv_nstate_task);
ieee80211_draintask(ic, &vap->iv_swbmiss_task);
/* XXX band-aid until ifnet handles this for us */
taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
IEEE80211_LOCK(ic);
KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
#ifdef IEEE80211_SUPPORT_SUPERG
ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
#endif
ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
/* NB: this handles the bpfdetach done below */
ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
ieee80211_syncifflag_locked(ic, IFF_PROMISC);
ieee80211_syncifflag_locked(ic, IFF_ALLMULTI);
IEEE80211_UNLOCK(ic);
ifmedia_removeall(&vap->iv_media);
ieee80211_radiotap_vdetach(vap);
ieee80211_regdomain_vdetach(vap);
ieee80211_scan_vdetach(vap);
#ifdef IEEE80211_SUPPORT_SUPERG
ieee80211_superg_vdetach(vap);
#endif
ieee80211_ht_vdetach(vap);
/* NB: must be before ieee80211_node_vdetach */
ieee80211_proto_vdetach(vap);
ieee80211_crypto_vdetach(vap);
ieee80211_power_vdetach(vap);
ieee80211_node_vdetach(vap);
ieee80211_sysctl_vdetach(vap);
if_free(ifp);
}
static int
hv_timesync_detach(device_t dev)
{
hv_timesync_sc *softc = device_get_softc(dev);
taskqueue_drain(taskqueue_thread, &softc->task);
return hv_util_detach(dev);
}
/**
* radeon_irq_kms_fini - tear down driver interrrupt info
*
* @rdev: radeon device pointer
*
* Tears down the work irq handlers, vblank handlers, MSIs, etc. (all asics).
*/
void radeon_irq_kms_fini(struct radeon_device *rdev)
{
drm_vblank_cleanup(rdev->ddev);
if (rdev->irq.installed) {
drm_irq_uninstall(rdev->ddev);
rdev->irq.installed = false;
}
taskqueue_drain(rdev->tq, &rdev->hotplug_work);
}
void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
{
struct mlx4_en_dev *mdev = priv->mdev;
taskqueue_drain(cq->tq, &cq->cq_task);
if (cq->is_tx)
del_timer(&cq->timer);
mlx4_cq_free(mdev->dev, &cq->mcq);
}
static int
kr_detach(device_t dev)
{
struct kr_softc *sc = device_get_softc(dev);
struct ifnet *ifp = sc->kr_ifp;
KASSERT(mtx_initialized(&sc->kr_mtx), ("vr mutex not initialized"));
/* These should only be active if attach succeeded */
if (device_is_attached(dev)) {
KR_LOCK(sc);
sc->kr_detach = 1;
kr_stop(sc);
KR_UNLOCK(sc);
taskqueue_drain(taskqueue_swi, &sc->kr_link_task);
ether_ifdetach(ifp);
}
if (sc->kr_miibus)
device_delete_child(dev, sc->kr_miibus);
bus_generic_detach(dev);
if (sc->kr_rx_intrhand)
bus_teardown_intr(dev, sc->kr_rx_irq, sc->kr_rx_intrhand);
if (sc->kr_rx_irq)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->kr_rx_irq);
if (sc->kr_tx_intrhand)
bus_teardown_intr(dev, sc->kr_tx_irq, sc->kr_tx_intrhand);
if (sc->kr_tx_irq)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->kr_tx_irq);
if (sc->kr_rx_und_intrhand)
bus_teardown_intr(dev, sc->kr_rx_und_irq,
sc->kr_rx_und_intrhand);
if (sc->kr_rx_und_irq)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->kr_rx_und_irq);
if (sc->kr_tx_ovr_intrhand)
bus_teardown_intr(dev, sc->kr_tx_ovr_irq,
sc->kr_tx_ovr_intrhand);
if (sc->kr_tx_ovr_irq)
bus_release_resource(dev, SYS_RES_IRQ, 0, sc->kr_tx_ovr_irq);
if (sc->kr_res)
bus_release_resource(dev, SYS_RES_MEMORY, sc->kr_rid,
sc->kr_res);
if (ifp)
if_free(ifp);
kr_dma_free(sc);
mtx_destroy(&sc->kr_mtx);
return (0);
}
void
AcpiOsWaitEventsComplete(void)
{
int i;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
for (i = 0; i < acpi_max_tasks; i++)
if ((atomic_load_acq_int(&acpi_tasks[i].at_flag) &
ACPI_TASK_ENQUEUED) != 0)
taskqueue_drain(acpi_taskq, &acpi_tasks[i].at_task);
return_VOID;
}
int
pefs_uninit(struct vfsconf *vfsp)
{
taskqueue_enqueue(pefs_taskq, &pefs_task_freenode);
taskqueue_drain(pefs_taskq, &pefs_task_freenode);
taskqueue_free(pefs_taskq);
pefs_dircache_uninit();
pefs_crypto_uninit();
mtx_destroy(&pefs_node_listmtx);
free(pefs_nodehash_tbl, M_PEFSHASH);
uma_zdestroy(pefs_node_zone);
return (0);
}
void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq)
{
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_en_cq *cq = *pcq;
taskqueue_drain(cq->tq, &cq->cq_task);
taskqueue_free(cq->tq);
mlx4_en_unmap_buffer(&cq->wqres.buf);
mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
if (priv->mdev->dev->caps.comp_pool && cq->vector)
mlx4_release_eq(priv->mdev->dev, cq->vector);
kfree(cq);
*pcq = NULL;
}
static void
sfxge_destroy(struct sfxge_softc *sc)
{
efx_nic_t *enp;
/* Clean up port state. */
sfxge_port_fini(sc);
/* Clean up transmit state. */
sfxge_tx_fini(sc);
/* Clean up receive state. */
sfxge_rx_fini(sc);
/* Clean up event processing state. */
sfxge_ev_fini(sc);
/* Clean up interrupts. */
sfxge_intr_fini(sc);
/* Tear down common code subsystems. */
efx_nic_reset(sc->enp);
efx_vpd_fini(sc->enp);
efx_nvram_fini(sc->enp);
efx_nic_unprobe(sc->enp);
/* Tear down MCDI. */
sfxge_mcdi_fini(sc);
/* Destroy common code context. */
enp = sc->enp;
sc->enp = NULL;
efx_nic_destroy(enp);
/* Free DMA memory. */
sfxge_dma_fini(sc);
/* Free mapped BARs. */
sfxge_bar_fini(sc);
(void) pci_disable_busmaster(sc->dev);
taskqueue_drain(taskqueue_thread, &sc->task_reset);
/* Destroy the softc lock. */
sx_destroy(&sc->softc_lock);
}
int
ata_detach(device_t dev)
{
struct ata_channel *ch = device_get_softc(dev);
/* check that we have a valid channel to detach */
if (!ch->r_irq)
return ENXIO;
/* grap the channel lock so no new requests gets launched */
mtx_lock(&ch->state_mtx);
ch->state |= ATA_STALL_QUEUE;
mtx_unlock(&ch->state_mtx);
if (ch->flags & ATA_PERIODIC_POLL)
callout_drain(&ch->poll_callout);
taskqueue_drain(taskqueue_thread, &ch->conntask);
mtx_lock(&ch->state_mtx);
xpt_async(AC_LOST_DEVICE, ch->path, NULL);
xpt_free_path(ch->path);
xpt_bus_deregister(cam_sim_path(ch->sim));
cam_sim_free(ch->sim, /*free_devq*/TRUE);
ch->sim = NULL;
mtx_unlock(&ch->state_mtx);
/* release resources */
bus_teardown_intr(dev, ch->r_irq, ch->ih);
bus_release_resource(dev, SYS_RES_IRQ, ATA_IRQ_RID, ch->r_irq);
ch->r_irq = NULL;
/* free DMA resources if DMA HW present*/
if (ch->dma.free)
ch->dma.free(dev);
mtx_destroy(&ch->state_mtx);
return 0;
}
static void
nmdm_free(void *softc)
{
struct nmdmpart *np = (struct nmdmpart *)softc;
struct nmdmsoftc *ns = np->np_pair;
callout_drain(&np->np_callout);
taskqueue_drain(taskqueue_swi, &np->np_task);
/*
* The function is called on both parts simultaneously. We serialize
* with help of ns_mtx. The first invocation should return and
* delegate freeing of resources to the second.
*/
mtx_lock(&ns->ns_mtx);
if (np->np_other != NULL) {
np->np_other->np_other = NULL;
mtx_unlock(&ns->ns_mtx);
return;
}
mtx_destroy(&ns->ns_mtx);
free(ns, M_NMDM);
atomic_subtract_int(&nmdm_count, 1);
}
static void
vmbus_chan_close_internal(struct vmbus_channel *chan)
{
struct vmbus_softc *sc = chan->ch_vmbus;
struct vmbus_msghc *mh;
struct vmbus_chanmsg_chclose *req;
struct taskqueue *tq = chan->ch_tq;
int error;
/* TODO: stringent check */
atomic_clear_int(&chan->ch_stflags, VMBUS_CHAN_ST_OPENED);
/*
* Free this channel's sysctl tree attached to its device's
* sysctl tree.
*/
sysctl_ctx_free(&chan->ch_sysctl_ctx);
/*
* Set ch_tq to NULL to avoid more requests be scheduled.
* XXX pretty broken; need rework.
*/
chan->ch_tq = NULL;
taskqueue_drain(tq, &chan->ch_task);
chan->ch_cb = NULL;
/*
* Close this channel.
*/
mh = vmbus_msghc_get(sc, sizeof(*req));
if (mh == NULL) {
device_printf(sc->vmbus_dev,
"can not get msg hypercall for chclose(chan%u)\n",
chan->ch_id);
return;
}
req = vmbus_msghc_dataptr(mh);
req->chm_hdr.chm_type = VMBUS_CHANMSG_TYPE_CHCLOSE;
req->chm_chanid = chan->ch_id;
error = vmbus_msghc_exec_noresult(mh);
vmbus_msghc_put(sc, mh);
if (error) {
device_printf(sc->vmbus_dev,
"chclose(chan%u) msg hypercall exec failed: %d\n",
chan->ch_id, error);
return;
} else if (bootverbose) {
device_printf(sc->vmbus_dev, "close chan%u\n", chan->ch_id);
}
/*
* Disconnect the TX+RX bufrings from this channel.
*/
if (chan->ch_bufring_gpadl) {
vmbus_chan_gpadl_disconnect(chan, chan->ch_bufring_gpadl);
chan->ch_bufring_gpadl = 0;
}
/*
* Destroy the TX+RX bufrings.
*/
if (chan->ch_bufring != NULL) {
hyperv_dmamem_free(&chan->ch_bufring_dma, chan->ch_bufring);
chan->ch_bufring = NULL;
}
}
int
smc_detach(device_t dev)
{
int type;
struct smc_softc *sc;
sc = device_get_softc(dev);
SMC_LOCK(sc);
smc_stop(sc);
SMC_UNLOCK(sc);
if (sc->smc_ifp != NULL) {
ether_ifdetach(sc->smc_ifp);
}
callout_drain(&sc->smc_watchdog);
callout_drain(&sc->smc_mii_tick_ch);
#ifdef DEVICE_POLLING
if (sc->smc_ifp->if_capenable & IFCAP_POLLING)
ether_poll_deregister(sc->smc_ifp);
#endif
if (sc->smc_ih != NULL)
bus_teardown_intr(sc->smc_dev, sc->smc_irq, sc->smc_ih);
if (sc->smc_tq != NULL) {
taskqueue_drain(sc->smc_tq, &sc->smc_intr);
taskqueue_drain(sc->smc_tq, &sc->smc_rx);
taskqueue_drain(sc->smc_tq, &sc->smc_tx);
taskqueue_free(sc->smc_tq);
sc->smc_tq = NULL;
}
if (sc->smc_ifp != NULL) {
if_free(sc->smc_ifp);
}
if (sc->smc_miibus != NULL) {
device_delete_child(sc->smc_dev, sc->smc_miibus);
bus_generic_detach(sc->smc_dev);
}
if (sc->smc_reg != NULL) {
type = SYS_RES_IOPORT;
if (sc->smc_usemem)
type = SYS_RES_MEMORY;
bus_release_resource(sc->smc_dev, type, sc->smc_reg_rid,
sc->smc_reg);
}
if (sc->smc_irq != NULL)
bus_release_resource(sc->smc_dev, SYS_RES_IRQ, sc->smc_irq_rid,
sc->smc_irq);
if (mtx_initialized(&sc->smc_mtx))
mtx_destroy(&sc->smc_mtx);
return (0);
}
