843e19887f64dde75055cf8842fc4db2171eff45johnlev/*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * CDDL HEADER START
843e19887f64dde75055cf8842fc4db2171eff45johnlev *
843e19887f64dde75055cf8842fc4db2171eff45johnlev * The contents of this file are subject to the terms of the
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Common Development and Distribution License (the "License").
843e19887f64dde75055cf8842fc4db2171eff45johnlev * You may not use this file except in compliance with the License.
843e19887f64dde75055cf8842fc4db2171eff45johnlev *
843e19887f64dde75055cf8842fc4db2171eff45johnlev * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
843e19887f64dde75055cf8842fc4db2171eff45johnlev * or http://www.opensolaris.org/os/licensing.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * See the License for the specific language governing permissions
843e19887f64dde75055cf8842fc4db2171eff45johnlev * and limitations under the License.
843e19887f64dde75055cf8842fc4db2171eff45johnlev *
843e19887f64dde75055cf8842fc4db2171eff45johnlev * When distributing Covered Code, include this CDDL HEADER in each
843e19887f64dde75055cf8842fc4db2171eff45johnlev * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * If applicable, add the following below this CDDL HEADER, with the
843e19887f64dde75055cf8842fc4db2171eff45johnlev * fields enclosed by brackets "[]" replaced with your own identifying
843e19887f64dde75055cf8842fc4db2171eff45johnlev * information: Portions Copyright [yyyy] [name of copyright owner]
843e19887f64dde75055cf8842fc4db2171eff45johnlev *
843e19887f64dde75055cf8842fc4db2171eff45johnlev * CDDL HEADER END
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Use is subject to license terms.
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * evtchn.c
843e19887f64dde75055cf8842fc4db2171eff45johnlev *
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Driver for receiving and demuxing event-channel signals.
843e19887f64dde75055cf8842fc4db2171eff45johnlev *
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Copyright (c) 2004-2005, K A Fraser
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Multi-process extensions Copyright (c) 2004, Steven Smith
843e19887f64dde75055cf8842fc4db2171eff45johnlev *
843e19887f64dde75055cf8842fc4db2171eff45johnlev * This file may be distributed separately from the Linux kernel, or
843e19887f64dde75055cf8842fc4db2171eff45johnlev * incorporated into other software packages, subject to the following license:
843e19887f64dde75055cf8842fc4db2171eff45johnlev *
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Permission is hereby granted, free of charge, to any person obtaining a copy
843e19887f64dde75055cf8842fc4db2171eff45johnlev * of this source file (the "Software"), to deal in the Software without
843e19887f64dde75055cf8842fc4db2171eff45johnlev * restriction, including without limitation the rights to use, copy, modify,
843e19887f64dde75055cf8842fc4db2171eff45johnlev * merge, publish, distribute, sublicense, and/or sell copies of the Software,
843e19887f64dde75055cf8842fc4db2171eff45johnlev * and to permit persons to whom the Software is furnished to do so, subject to
843e19887f64dde75055cf8842fc4db2171eff45johnlev * the following conditions:
843e19887f64dde75055cf8842fc4db2171eff45johnlev *
843e19887f64dde75055cf8842fc4db2171eff45johnlev * The above copyright notice and this permission notice shall be included in
843e19887f64dde75055cf8842fc4db2171eff45johnlev * all copies or substantial portions of the Software.
843e19887f64dde75055cf8842fc4db2171eff45johnlev *
843e19887f64dde75055cf8842fc4db2171eff45johnlev * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
843e19887f64dde75055cf8842fc4db2171eff45johnlev * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
843e19887f64dde75055cf8842fc4db2171eff45johnlev * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
843e19887f64dde75055cf8842fc4db2171eff45johnlev * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
843e19887f64dde75055cf8842fc4db2171eff45johnlev * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
843e19887f64dde75055cf8842fc4db2171eff45johnlev * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
843e19887f64dde75055cf8842fc4db2171eff45johnlev * IN THE SOFTWARE.
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/types.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/hypervisor.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/machsystm.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/mutex.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/evtchn_impl.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/ddi_impldefs.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/avintr.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/cpuvar.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/smp_impldefs.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/archsystm.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/sysmacros.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/fcntl.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/open.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/stat.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/psm.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/cpu.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/cmn_err.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <sys/xen_errno.h>
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlev#include <sys/policy.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev#include <xen/sys/evtchn.h>
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/* Some handy macros */
843e19887f64dde75055cf8842fc4db2171eff45johnlev#define EVTCHNDRV_MINOR2INST(minor) ((int)(minor))
843e19887f64dde75055cf8842fc4db2171eff45johnlev#define EVTCHNDRV_DEFAULT_NCLONES 256
843e19887f64dde75055cf8842fc4db2171eff45johnlev#define EVTCHNDRV_INST2SOFTS(inst) \
843e19887f64dde75055cf8842fc4db2171eff45johnlev (ddi_get_soft_state(evtchndrv_statep, (inst)))
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/* Soft state data structure for evtchn driver */
843e19887f64dde75055cf8842fc4db2171eff45johnlevstruct evtsoftdata {
843e19887f64dde75055cf8842fc4db2171eff45johnlev dev_info_t *dip;
843e19887f64dde75055cf8842fc4db2171eff45johnlev /* Notification ring, accessed via /dev/xen/evtchn. */
843e19887f64dde75055cf8842fc4db2171eff45johnlev#define EVTCHN_RING_SIZE (PAGESIZE / sizeof (evtchn_port_t))
843e19887f64dde75055cf8842fc4db2171eff45johnlev#define EVTCHN_RING_MASK(_i) ((_i) & (EVTCHN_RING_SIZE - 1))
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchn_port_t *ring;
843e19887f64dde75055cf8842fc4db2171eff45johnlev unsigned int ring_cons, ring_prod, ring_overflow;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee kcondvar_t evtchn_wait; /* Processes wait on this when ring is empty. */
843e19887f64dde75055cf8842fc4db2171eff45johnlev kmutex_t evtchn_lock;
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct pollhead evtchn_pollhead;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee pid_t pid; /* last pid to bind to this event channel. */
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee processorid_t cpu; /* cpu thread/evtchn is bound to */
843e19887f64dde75055cf8842fc4db2171eff45johnlev};
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic void *evtchndrv_statep;
843e19887f64dde75055cf8842fc4db2171eff45johnlevint evtchndrv_nclones = EVTCHNDRV_DEFAULT_NCLONES;
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int *evtchndrv_clone_tab;
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic dev_info_t *evtchndrv_dip;
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic kmutex_t evtchndrv_clone_tab_mutex;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int evtchndrv_detach(dev_info_t *, ddi_detach_cmd_t);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/* Who's bound to each port? */
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic struct evtsoftdata *port_user[NR_EVENT_CHANNELS];
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic kmutex_t port_user_lock;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevvoid
843e19887f64dde75055cf8842fc4db2171eff45johnlevevtchn_device_upcall()
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct evtsoftdata *ep;
843e19887f64dde75055cf8842fc4db2171eff45johnlev int port;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * This is quite gross, we had to leave the evtchn that led to this
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee * invocation in a per-cpu mailbox, retrieve it now.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * We do this because the interface doesn't offer us a way to pass
843e19887f64dde75055cf8842fc4db2171eff45johnlev * a dynamic argument up through the generic interrupt service layer.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * The mailbox is safe since we either run with interrupts disabled or
843e19887f64dde75055cf8842fc4db2171eff45johnlev * non-preemptable till we reach here.
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee port = CPU->cpu_m.mcpu_ec_mbox;
843e19887f64dde75055cf8842fc4db2171eff45johnlev ASSERT(port != 0);
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee CPU->cpu_m.mcpu_ec_mbox = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev ec_clear_evtchn(port);
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if ((ep = port_user[port]) != NULL) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&ep->evtchn_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev if ((ep->ring_prod - ep->ring_cons) < EVTCHN_RING_SIZE) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep->ring[EVTCHN_RING_MASK(ep->ring_prod)] = port;
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Wake up reader when ring goes non-empty
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (ep->ring_cons == ep->ring_prod++) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev cv_signal(&ep->evtchn_wait);
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&ep->evtchn_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev pollwakeup(&ep->evtchn_pollhead,
843e19887f64dde75055cf8842fc4db2171eff45johnlev POLLIN | POLLRDNORM);
843e19887f64dde75055cf8842fc4db2171eff45johnlev goto done;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev } else {
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep->ring_overflow = 1;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&ep->evtchn_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevdone:
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/* ARGSUSED */
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlevevtchndrv_read(dev_t dev, struct uio *uio, cred_t *cr)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev int rc = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev ssize_t count;
843e19887f64dde75055cf8842fc4db2171eff45johnlev unsigned int c, p, bytes1 = 0, bytes2 = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct evtsoftdata *ep;
843e19887f64dde75055cf8842fc4db2171eff45johnlev minor_t minor = getminor(dev);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlev if (secpolicy_xvm_control(cr))
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlev return (EPERM);
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep = EVTCHNDRV_INST2SOFTS(EVTCHNDRV_MINOR2INST(minor));
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /* Whole number of ports. */
843e19887f64dde75055cf8842fc4db2171eff45johnlev count = uio->uio_resid;
843e19887f64dde75055cf8842fc4db2171eff45johnlev count &= ~(sizeof (evtchn_port_t) - 1);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (count == 0)
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (count > PAGESIZE)
843e19887f64dde75055cf8842fc4db2171eff45johnlev count = PAGESIZE;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&ep->evtchn_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev for (;;) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (ep->ring_overflow) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev rc = EFBIG;
843e19887f64dde75055cf8842fc4db2171eff45johnlev goto done;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if ((c = ep->ring_cons) != (p = ep->ring_prod))
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (uio->uio_fmode & O_NONBLOCK) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev rc = EAGAIN;
843e19887f64dde75055cf8842fc4db2171eff45johnlev goto done;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (cv_wait_sig(&ep->evtchn_wait, &ep->evtchn_lock) == 0) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev rc = EINTR;
843e19887f64dde75055cf8842fc4db2171eff45johnlev goto done;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /* Byte lengths of two chunks. Chunk split (if any) is at ring wrap. */
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (((c ^ p) & EVTCHN_RING_SIZE) != 0) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev bytes1 = (EVTCHN_RING_SIZE - EVTCHN_RING_MASK(c)) *
843e19887f64dde75055cf8842fc4db2171eff45johnlev sizeof (evtchn_port_t);
843e19887f64dde75055cf8842fc4db2171eff45johnlev bytes2 = EVTCHN_RING_MASK(p) * sizeof (evtchn_port_t);
843e19887f64dde75055cf8842fc4db2171eff45johnlev } else {
843e19887f64dde75055cf8842fc4db2171eff45johnlev bytes1 = (p - c) * sizeof (evtchn_port_t);
843e19887f64dde75055cf8842fc4db2171eff45johnlev bytes2 = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /* Truncate chunks according to caller's maximum byte count. */
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (bytes1 > count) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev bytes1 = count;
843e19887f64dde75055cf8842fc4db2171eff45johnlev bytes2 = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev } else if ((bytes1 + bytes2) > count) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev bytes2 = count - bytes1;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (uiomove(&ep->ring[EVTCHN_RING_MASK(c)], bytes1, UIO_READ, uio) ||
843e19887f64dde75055cf8842fc4db2171eff45johnlev ((bytes2 != 0) && uiomove(&ep->ring[0], bytes2, UIO_READ, uio))) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev rc = EFAULT;
843e19887f64dde75055cf8842fc4db2171eff45johnlev goto done;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep->ring_cons += (bytes1 + bytes2) / sizeof (evtchn_port_t);
843e19887f64dde75055cf8842fc4db2171eff45johnlevdone:
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&ep->evtchn_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (rc);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/* ARGSUSED */
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlevevtchndrv_write(dev_t dev, struct uio *uio, cred_t *cr)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev int rc, i;
843e19887f64dde75055cf8842fc4db2171eff45johnlev ssize_t count;
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchn_port_t *kbuf;
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct evtsoftdata *ep;
843e19887f64dde75055cf8842fc4db2171eff45johnlev ulong_t flags;
843e19887f64dde75055cf8842fc4db2171eff45johnlev minor_t minor = getminor(dev);
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee evtchn_port_t sbuf[32];
843e19887f64dde75055cf8842fc4db2171eff45johnlev
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlev if (secpolicy_xvm_control(cr))
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlev return (EPERM);
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep = EVTCHNDRV_INST2SOFTS(EVTCHNDRV_MINOR2INST(minor));
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /* Whole number of ports. */
843e19887f64dde75055cf8842fc4db2171eff45johnlev count = uio->uio_resid;
843e19887f64dde75055cf8842fc4db2171eff45johnlev count &= ~(sizeof (evtchn_port_t) - 1);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee if (count == 0)
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee return (0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (count > PAGESIZE)
843e19887f64dde75055cf8842fc4db2171eff45johnlev count = PAGESIZE;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee if (count <= sizeof (sbuf))
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee kbuf = sbuf;
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee else
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee kbuf = kmem_alloc(PAGESIZE, KM_SLEEP);
843e19887f64dde75055cf8842fc4db2171eff45johnlev if ((rc = uiomove(kbuf, count, UIO_WRITE, uio)) != 0)
843e19887f64dde75055cf8842fc4db2171eff45johnlev goto out;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev for (i = 0; i < (count / sizeof (evtchn_port_t)); i++)
843e19887f64dde75055cf8842fc4db2171eff45johnlev if ((kbuf[i] < NR_EVENT_CHANNELS) &&
843e19887f64dde75055cf8842fc4db2171eff45johnlev (port_user[kbuf[i]] == ep)) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev flags = intr_clear();
843e19887f64dde75055cf8842fc4db2171eff45johnlev ec_unmask_evtchn(kbuf[i]);
843e19887f64dde75055cf8842fc4db2171eff45johnlev intr_restore(flags);
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevout:
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee if (kbuf != sbuf)
349b53dd4e695e3d833b5380540385145b2d3ae8Stuart Maybee kmem_free(kbuf, PAGESIZE);
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (rc);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic void
843e19887f64dde75055cf8842fc4db2171eff45johnlevevtchn_bind_to_user(struct evtsoftdata *u, int port)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev ulong_t flags;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * save away the PID of the last process to bind to this event channel.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Useful for debugging.
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev u->pid = ddi_get_pid();
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev ASSERT(port_user[port] == NULL);
843e19887f64dde75055cf8842fc4db2171eff45johnlev port_user[port] = u;
843e19887f64dde75055cf8842fc4db2171eff45johnlev ec_irq_add_evtchn(ec_dev_irq, port);
843e19887f64dde75055cf8842fc4db2171eff45johnlev flags = intr_clear();
843e19887f64dde75055cf8842fc4db2171eff45johnlev ec_unmask_evtchn(port);
843e19887f64dde75055cf8842fc4db2171eff45johnlev intr_restore(flags);
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic void
843e19887f64dde75055cf8842fc4db2171eff45johnlevevtchndrv_close_evtchn(int port)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct evtsoftdata *ep;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ASSERT(MUTEX_HELD(&port_user_lock));
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep = port_user[port];
843e19887f64dde75055cf8842fc4db2171eff45johnlev ASSERT(ep != NULL);
843e19887f64dde75055cf8842fc4db2171eff45johnlev (void) ec_mask_evtchn(port);
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * It is possible the event is in transit to us.
843e19887f64dde75055cf8842fc4db2171eff45johnlev * If it is already in the ring buffer, then a client may
843e19887f64dde75055cf8842fc4db2171eff45johnlev * get a spurious event notification on the next read of
843e19887f64dde75055cf8842fc4db2171eff45johnlev * of the evtchn device. Clients will need to be able to
843e19887f64dde75055cf8842fc4db2171eff45johnlev * handle getting a spurious event notification.
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev port_user[port] = NULL;
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * The event is masked and should stay so, clean it up.
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev ec_irq_rm_evtchn(ec_dev_irq, port);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/* ARGSUSED */
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlevevtchndrv_ioctl(dev_t dev, int cmd, intptr_t data, int flag, cred_t *cr,
843e19887f64dde75055cf8842fc4db2171eff45johnlev int *rvalp)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev int err = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct evtsoftdata *ep;
843e19887f64dde75055cf8842fc4db2171eff45johnlev minor_t minor = getminor(dev);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlev if (secpolicy_xvm_control(cr))
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlev return (EPERM);
b26a64ae582e72d0b4c710cd8eba9c4afd4a9fddjohnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep = EVTCHNDRV_INST2SOFTS(EVTCHNDRV_MINOR2INST(minor));
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev *rvalp = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev switch (cmd) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev case IOCTL_EVTCHN_BIND_VIRQ: {
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct ioctl_evtchn_bind_virq bind;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (copyin((void *)data, &bind, sizeof (bind))) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = EFAULT;
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if ((err = xen_bind_virq(bind.virq, 0, rvalp)) != 0)
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchn_bind_to_user(ep, *rvalp);
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev case IOCTL_EVTCHN_BIND_INTERDOMAIN: {
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct ioctl_evtchn_bind_interdomain bind;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (copyin((void *)data, &bind, sizeof (bind))) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = EFAULT;
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if ((err = xen_bind_interdomain(bind.remote_domain,
843e19887f64dde75055cf8842fc4db2171eff45johnlev bind.remote_port, rvalp)) != 0)
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ec_bind_vcpu(*rvalp, 0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchn_bind_to_user(ep, *rvalp);
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev case IOCTL_EVTCHN_BIND_UNBOUND_PORT: {
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct ioctl_evtchn_bind_unbound_port bind;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (copyin((void *)data, &bind, sizeof (bind))) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = EFAULT;
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if ((err = xen_alloc_unbound_evtchn(bind.remote_domain,
843e19887f64dde75055cf8842fc4db2171eff45johnlev rvalp)) != 0)
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchn_bind_to_user(ep, *rvalp);
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev case IOCTL_EVTCHN_UNBIND: {
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct ioctl_evtchn_unbind unbind;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (copyin((void *)data, &unbind, sizeof (unbind))) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = EFAULT;
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (unbind.port >= NR_EVENT_CHANNELS) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = EFAULT;
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (port_user[unbind.port] != ep) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = ENOTCONN;
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_close_evtchn(unbind.port);
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev case IOCTL_EVTCHN_NOTIFY: {
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct ioctl_evtchn_notify notify;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (copyin((void *)data, &notify, sizeof (notify))) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = EFAULT;
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (notify.port >= NR_EVENT_CHANNELS) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = EINVAL;
843e19887f64dde75055cf8842fc4db2171eff45johnlev } else if (port_user[notify.port] != ep) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = ENOTCONN;
843e19887f64dde75055cf8842fc4db2171eff45johnlev } else {
843e19887f64dde75055cf8842fc4db2171eff45johnlev ec_notify_via_evtchn(notify.port);
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev default:
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = ENOSYS;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (err);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int
843e19887f64dde75055cf8842fc4db2171eff45johnlevevtchndrv_poll(dev_t dev, short ev, int anyyet, short *revp, pollhead_t **phpp)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct evtsoftdata *ep;
843e19887f64dde75055cf8842fc4db2171eff45johnlev minor_t minor = getminor(dev);
843e19887f64dde75055cf8842fc4db2171eff45johnlev short mask = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep = EVTCHNDRV_INST2SOFTS(EVTCHNDRV_MINOR2INST(minor));
843e19887f64dde75055cf8842fc4db2171eff45johnlev *phpp = (struct pollhead *)NULL;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (ev & POLLOUT)
843e19887f64dde75055cf8842fc4db2171eff45johnlev mask |= POLLOUT;
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (ep->ring_overflow)
843e19887f64dde75055cf8842fc4db2171eff45johnlev mask |= POLLERR;
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (ev & (POLLIN | POLLRDNORM)) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&ep->evtchn_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (ep->ring_cons != ep->ring_prod)
843e19887f64dde75055cf8842fc4db2171eff45johnlev mask |= (POLLIN | POLLRDNORM) & ev;
843e19887f64dde75055cf8842fc4db2171eff45johnlev else
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (mask == 0 && !anyyet)
843e19887f64dde75055cf8842fc4db2171eff45johnlev *phpp = &ep->evtchn_pollhead;
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&ep->evtchn_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev *revp = mask;
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/* ARGSUSED */
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int
843e19887f64dde75055cf8842fc4db2171eff45johnlevevtchndrv_open(dev_t *devp, int flag, int otyp, cred_t *credp)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct evtsoftdata *ep;
843e19887f64dde75055cf8842fc4db2171eff45johnlev minor_t minor = getminor(*devp);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (otyp == OTYP_BLK)
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (ENXIO);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * only allow open on minor = 0 - the clone device
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (minor != 0)
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (ENXIO);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * find a free slot and grab it
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&evtchndrv_clone_tab_mutex);
843e19887f64dde75055cf8842fc4db2171eff45johnlev for (minor = 1; minor < evtchndrv_nclones; minor++) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (evtchndrv_clone_tab[minor] == 0) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_clone_tab[minor] = 1;
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&evtchndrv_clone_tab_mutex);
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (minor == evtchndrv_nclones)
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (EAGAIN);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /* Allocate softstate structure */
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (ddi_soft_state_zalloc(evtchndrv_statep,
843e19887f64dde75055cf8842fc4db2171eff45johnlev EVTCHNDRV_MINOR2INST(minor)) != DDI_SUCCESS) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&evtchndrv_clone_tab_mutex);
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_clone_tab[minor] = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&evtchndrv_clone_tab_mutex);
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (EAGAIN);
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep = EVTCHNDRV_INST2SOFTS(EVTCHNDRV_MINOR2INST(minor));
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /* ... and init it */
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep->dip = evtchndrv_dip;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev cv_init(&ep->evtchn_wait, NULL, CV_DEFAULT, NULL);
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_init(&ep->evtchn_lock, NULL, MUTEX_DEFAULT, NULL);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep->ring = kmem_alloc(PAGESIZE, KM_SLEEP);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /* clone driver */
843e19887f64dde75055cf8842fc4db2171eff45johnlev *devp = makedevice(getmajor(*devp), minor);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/* ARGSUSED */
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int
843e19887f64dde75055cf8842fc4db2171eff45johnlevevtchndrv_close(dev_t dev, int flag, int otyp, struct cred *credp)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev struct evtsoftdata *ep;
843e19887f64dde75055cf8842fc4db2171eff45johnlev minor_t minor = getminor(dev);
843e19887f64dde75055cf8842fc4db2171eff45johnlev int i;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ep = EVTCHNDRV_INST2SOFTS(EVTCHNDRV_MINOR2INST(minor));
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (ep == NULL)
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (ENXIO);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev for (i = 0; i < NR_EVENT_CHANNELS; i++) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (port_user[i] != ep)
843e19887f64dde75055cf8842fc4db2171eff45johnlev continue;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_close_evtchn(i);
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&port_user_lock);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev kmem_free(ep->ring, PAGESIZE);
843e19887f64dde75055cf8842fc4db2171eff45johnlev ddi_soft_state_free(evtchndrv_statep, EVTCHNDRV_MINOR2INST(minor));
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * free clone tab slot
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_enter(&evtchndrv_clone_tab_mutex);
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_clone_tab[minor] = 0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_exit(&evtchndrv_clone_tab_mutex);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/* ARGSUSED */
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int
843e19887f64dde75055cf8842fc4db2171eff45johnlevevtchndrv_info(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **result)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev dev_t dev = (dev_t)arg;
843e19887f64dde75055cf8842fc4db2171eff45johnlev minor_t minor = getminor(dev);
843e19887f64dde75055cf8842fc4db2171eff45johnlev int retval;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev switch (cmd) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev case DDI_INFO_DEVT2DEVINFO:
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (minor != 0 || evtchndrv_dip == NULL) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev *result = (void *)NULL;
843e19887f64dde75055cf8842fc4db2171eff45johnlev retval = DDI_FAILURE;
843e19887f64dde75055cf8842fc4db2171eff45johnlev } else {
843e19887f64dde75055cf8842fc4db2171eff45johnlev *result = (void *)evtchndrv_dip;
843e19887f64dde75055cf8842fc4db2171eff45johnlev retval = DDI_SUCCESS;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev case DDI_INFO_DEVT2INSTANCE:
843e19887f64dde75055cf8842fc4db2171eff45johnlev *result = (void *)0;
843e19887f64dde75055cf8842fc4db2171eff45johnlev retval = DDI_SUCCESS;
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev default:
843e19887f64dde75055cf8842fc4db2171eff45johnlev retval = DDI_FAILURE;
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (retval);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int
843e19887f64dde75055cf8842fc4db2171eff45johnlevevtchndrv_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev int error;
843e19887f64dde75055cf8842fc4db2171eff45johnlev int unit = ddi_get_instance(dip);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev switch (cmd) {
843e19887f64dde75055cf8842fc4db2171eff45johnlev case DDI_ATTACH:
843e19887f64dde75055cf8842fc4db2171eff45johnlev break;
843e19887f64dde75055cf8842fc4db2171eff45johnlev case DDI_RESUME:
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (DDI_SUCCESS);
843e19887f64dde75055cf8842fc4db2171eff45johnlev default:
843e19887f64dde75055cf8842fc4db2171eff45johnlev cmn_err(CE_WARN, "evtchn_attach: unknown cmd 0x%x\n", cmd);
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (DDI_FAILURE);
843e19887f64dde75055cf8842fc4db2171eff45johnlev }
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /* DDI_ATTACH */
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * only one instance - but we clone using the open routine
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (ddi_get_instance(dip) > 0)
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (DDI_FAILURE);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_init(&evtchndrv_clone_tab_mutex, NULL, MUTEX_DRIVER,
843e19887f64dde75055cf8842fc4db2171eff45johnlev NULL);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev error = ddi_create_minor_node(dip, "evtchn", S_IFCHR, unit,
843e19887f64dde75055cf8842fc4db2171eff45johnlev DDI_PSEUDO, NULL);
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (error != DDI_SUCCESS)
843e19887f64dde75055cf8842fc4db2171eff45johnlev goto fail;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * save dip for getinfo
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_dip = dip;
843e19887f64dde75055cf8842fc4db2171eff45johnlev ddi_report_dev(dip);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev mutex_init(&port_user_lock, NULL, MUTEX_DRIVER, NULL);
843e19887f64dde75055cf8842fc4db2171eff45johnlev (void) memset(port_user, 0, sizeof (port_user));
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ec_dev_irq = ec_dev_alloc_irq();
843e19887f64dde75055cf8842fc4db2171eff45johnlev (void) add_avintr(NULL, IPL_EVTCHN, (avfunc)evtchn_device_upcall,
843e19887f64dde75055cf8842fc4db2171eff45johnlev "evtchn_driver", ec_dev_irq, NULL, NULL, NULL, dip);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (DDI_SUCCESS);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevfail:
843e19887f64dde75055cf8842fc4db2171eff45johnlev (void) evtchndrv_detach(dip, DDI_DETACH);
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (error);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/*ARGSUSED*/
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic int
843e19887f64dde75055cf8842fc4db2171eff45johnlevevtchndrv_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev /*
843e19887f64dde75055cf8842fc4db2171eff45johnlev * Don't allow detach for now.
843e19887f64dde75055cf8842fc4db2171eff45johnlev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (DDI_FAILURE);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev/* Solaris driver framework */
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic struct cb_ops evtchndrv_cb_ops = {
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_open, /* cb_open */
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_close, /* cb_close */
843e19887f64dde75055cf8842fc4db2171eff45johnlev nodev, /* cb_strategy */
843e19887f64dde75055cf8842fc4db2171eff45johnlev nodev, /* cb_print */
843e19887f64dde75055cf8842fc4db2171eff45johnlev nodev, /* cb_dump */
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_read, /* cb_read */
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_write, /* cb_write */
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_ioctl, /* cb_ioctl */
843e19887f64dde75055cf8842fc4db2171eff45johnlev nodev, /* cb_devmap */
843e19887f64dde75055cf8842fc4db2171eff45johnlev nodev, /* cb_mmap */
843e19887f64dde75055cf8842fc4db2171eff45johnlev nodev, /* cb_segmap */
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_poll, /* cb_chpoll */
843e19887f64dde75055cf8842fc4db2171eff45johnlev ddi_prop_op, /* cb_prop_op */
843e19887f64dde75055cf8842fc4db2171eff45johnlev 0, /* cb_stream */
843e19887f64dde75055cf8842fc4db2171eff45johnlev D_NEW | D_MP | D_64BIT /* cb_flag */
843e19887f64dde75055cf8842fc4db2171eff45johnlev};
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic struct dev_ops evtchndrv_dev_ops = {
843e19887f64dde75055cf8842fc4db2171eff45johnlev DEVO_REV, /* devo_rev */
843e19887f64dde75055cf8842fc4db2171eff45johnlev 0, /* devo_refcnt */
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_info, /* devo_getinfo */
843e19887f64dde75055cf8842fc4db2171eff45johnlev nulldev, /* devo_identify */
843e19887f64dde75055cf8842fc4db2171eff45johnlev nulldev, /* devo_probe */
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_attach, /* devo_attach */
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_detach, /* devo_detach */
843e19887f64dde75055cf8842fc4db2171eff45johnlev nodev, /* devo_reset */
843e19887f64dde75055cf8842fc4db2171eff45johnlev &evtchndrv_cb_ops, /* devo_cb_ops */
843e19887f64dde75055cf8842fc4db2171eff45johnlev NULL, /* devo_bus_ops */
193974072f41a843678abf5f61979c748687e66bSherry Moore NULL, /* power */
193974072f41a843678abf5f61979c748687e66bSherry Moore ddi_quiesce_not_needed, /* devo_quiesce */
843e19887f64dde75055cf8842fc4db2171eff45johnlev};
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic struct modldrv modldrv = {
843e19887f64dde75055cf8842fc4db2171eff45johnlev &mod_driverops, /* Type of module. This one is a driver */
193974072f41a843678abf5f61979c748687e66bSherry Moore "Evtchn driver", /* Name of the module. */
843e19887f64dde75055cf8842fc4db2171eff45johnlev &evtchndrv_dev_ops /* driver ops */
843e19887f64dde75055cf8842fc4db2171eff45johnlev};
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevstatic struct modlinkage modlinkage = {
843e19887f64dde75055cf8842fc4db2171eff45johnlev MODREV_1,
843e19887f64dde75055cf8842fc4db2171eff45johnlev &modldrv,
843e19887f64dde75055cf8842fc4db2171eff45johnlev NULL
843e19887f64dde75055cf8842fc4db2171eff45johnlev};
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevint
843e19887f64dde75055cf8842fc4db2171eff45johnlev_init(void)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev int err;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = ddi_soft_state_init(&evtchndrv_statep,
843e19887f64dde75055cf8842fc4db2171eff45johnlev sizeof (struct evtsoftdata), 1);
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (err)
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (err);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev err = mod_install(&modlinkage);
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (err)
843e19887f64dde75055cf8842fc4db2171eff45johnlev ddi_soft_state_fini(&evtchndrv_statep);
843e19887f64dde75055cf8842fc4db2171eff45johnlev else
843e19887f64dde75055cf8842fc4db2171eff45johnlev evtchndrv_clone_tab = kmem_zalloc(
843e19887f64dde75055cf8842fc4db2171eff45johnlev sizeof (int) * evtchndrv_nclones, KM_SLEEP);
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (err);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevint
843e19887f64dde75055cf8842fc4db2171eff45johnlev_fini(void)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev int e;
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev e = mod_remove(&modlinkage);
843e19887f64dde75055cf8842fc4db2171eff45johnlev if (e)
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (e);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev ddi_soft_state_fini(&evtchndrv_statep);
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (0);
843e19887f64dde75055cf8842fc4db2171eff45johnlev}
843e19887f64dde75055cf8842fc4db2171eff45johnlev
843e19887f64dde75055cf8842fc4db2171eff45johnlevint
843e19887f64dde75055cf8842fc4db2171eff45johnlev_info(struct modinfo *modinfop)
843e19887f64dde75055cf8842fc4db2171eff45johnlev{
843e19887f64dde75055cf8842fc4db2171eff45johnlev return (mod_info(&modlinkage, modinfop));
843e19887f64dde75055cf8842fc4db2171eff45johnlev}